Calibration Standards & Uniform Light Sources - Page 131

Table of Contents

General Information
Calibration standards are em- and the technically competency detectors are used. Calibration is bration of spectral radiometers
ployed in determining the corre- of the calibration laboratory (see accomplished using the transfer with a spectral irradiance stan-
lation between an input and an Calibration Chapter). method described previously. dard source for example.
output quantity for all types of Proper care and use of the cali- Absolute sensitivity is confirmed In imaging applications the
measurement instrumentation. bration standards is critical to in a calibration certificate that uniformity in sensitivity of the
By supplying a signal of known long term success in the calibra- includes other descriptive and imaging detection system is very
quantity, the difference between tion transfer method. procedural information . important. Light sources with a
the output signal of the test de- A typical example of a detector uniform light emitting area are
vice and the calibration stan- Photometric and radiometric based calibration is the spectral needed as reference standards
dard can be evaluated. From light measurement applica- sensitivity calibration of photodi- in this type of calibration to de-
these differences calibration tions involve many different odes employing a tunable mono- termine the non-uniformity of a
correction factors can be calcu- measurement quantities such as: chromatic light source with its lens system or imaging detection
lated allowing adjustment of the • Illuminance / Irradiance output compared to the known system. Uniform light sources
test device for absolute readings. spectral sensitivity of a standard built around integrating spheres
Transfer standards are used to
• Luminance / Radiance detector. are the best known solution for
transfer the values of the primary • Luminous Flux /Radiant Power setting up uniform light sources.
standard, often certified by a • Luminous Intensity / Radiant For the calibration of light
national calibration laboratory, to Intensity sources calibration standards in Gigahertz-Optik offers a wide
the secondary calibration facility. the form of light sources are selection of calibration standards
This fulfills the traceability re- Each quantity requires its own used. Here reference standard and uniform light sources.
quirement for an unbroken chain calibration standard. light sources are used to cali- For the measurement quantities
of transfer comparisons back to brate the light measurement of spectral sensitivity and spec-
the national primary standard. For optical radiation calibra- system which in turn is used to tral irradiance Gigahertz-Optik’s
Calibration uncertainty de- tion of light detectors calibra- calibrate the unknown light calibration laboratory is ISO EN
pends on the calibration hierar- tion standards in the form of light source. 17025 accredited.
chy of the standards employed This method is used for the cali-

Table of Contents
Light Sources
Model Transfer Unit Unit Spectral Lamp Power Comments Spec.
Range nm Reflectance Page
BN-LH250 Spectral Irradiance W/m² nm 250-2500 250 W QH Lamp, Horizontal Emitting Axis 132
BN-9101 Spectral Irradiance W/m² nm 250-2500 1000 W QH Lamp, Horizontal Emitting Axis 133
BN-0001 Spectral Irradiance W/m² nm 250-2500 1000 W QH Lamp, Vertical Emitting Axis 133
BN-0104 Spectral Radiant Power W/nm 350-1100 100 W QH Lamp, Post Mounted for use in 500 mm 134
& Luminance lm 380-780 Diameter Integrating Sphere
BN-0102 Spectral Radiance W/(m²sr) nm 380-1100 10 W 50 mm OP.DI.MA. Sphere with 20 mm Port 135
BN-ULS-K190 300-2500 ≤ 100 W 190 mm OP.DI.MA. Sphere with 75 mm Port 138
BN-ULS-M150 350-2400 ≤ 100 W Integrating Sphere Based Uniform Light 136 - 137
• Spectral Radiance W/(m² sr) nm
Sources with BaSO4 or OP.DI.MA. Coating.
BN-ULS-M300 cd/m² 350-2400 ≤ 300 W 136 - 137
• Luminance %
Different Sphere Diameters with Custom
BN-ULS-M500 • Uniformity 350-2400 ≤ 500 W Specified Light Emitting Ports, Internal and 136 - 137
BN-ULS-M1000 350-2400 External Light Sources, Reference Light De- 136 - 137
≤ 1000 W
tectors, Variable Apertures & accys.
BN-ULS-M1700 350-2400 ≤ 2000 W 136 - 137
Light Detectors
BN-DSR-100 Spectral Radiant Power A/W nm 200-1100 - Large Size Si Photodiode 139
Sensitivity
BN-DSI-33 Spectral Irradiance A/(W/m²) nm 250-1100 - Photodiode with 11 mm Diameter Diffuser 139
Sensitivity Window
Reflectance Plates
BN-Rxx-D2 Spectral Reflectance % @ nm 250-2500 3, 50 & 98 % 2 in Diameter. xx = Reflectance 140
BN-R98-SQ50 Spectral Reflectance % @ nm 250-2500 98 % 50 mm Square. xx = Reflectance 140
BN-R98-SQ100 Spectral Reflectance % @ nm 250-2500 98 % 100 mm Square. xx = Reflectance 140
BN-R98-SQ200 Spectral Reflectance % @ nm 250-2500 98 % 200 mm Square. xx = Reflectance 140
BN-R98-SQ300 Spectral Reflectance % @ nm 250-2500 98 % 300 mm Square. xx = Reflectance 140
BN-Rxx-SQ5 Spectral Reflectance % @ nm 250-2500 3, 50 & 98 % 5 in / 127 mm Square. xx = Reflectance 140
BN-Rxx-SQ12 Spectral Reflectance % @ nm 250-2500 3, 50 & 98 % 12 in / 304 mm Square. xx = Reflectance 140
BN-Rxx-SQ18 Spectral Reflectance % @ nm 250-2500 3, 50 & 98 % 18 in / 457 mm Square. xx = Reflectance 140
Page 132 - Calibration Standards & Uniform Light Sources
Spectral Irradiance

BN-LH250: 250 W Spectral Irradiance Standard Lamp

80

70

60

irradiance mW/(m²nm)
50

40

30

20

10

0
250 450 650 850 1050 1250 1450 1650 1850

wavelengt h ( nm )

Typical Spectral Irradiance at 3100 K

LPS-250 Power Supply

The BN-LH250 spectral irradi- neers evaluate this data to de-

ance standard lamp is a precise cide if the lamp qualifies for use
transfer standard for spectral ir- as a reference standard lamp. If
radiance in the wavelength range the lamp qualifies a burn-in cer-
from 250 to 2500 nm. tificate that includes this data is
The lamp standard consists of a issued.
carefully selected 250 W tung- Calibration of spectral irradiance
sten halogen lamp with a diffuse is done using a double-
quartz envelope and stable fila- monochromator spectral radi- LPS-250 in Bench-Top Housing BTH-19/2
ment mounted into a ceramic ometer at a distance of 50 cm to
lamp base to help with tempera- the reference plane of the stan-
The LPS-250 lamp power supply The RS232 or RS488 interface
ture equalization. The lamp base dard lamp. Description and is specially designed for stable enables full remote control op-
allows free standing and post specifications for this KLW-S1 operation of lamps. It offers a eration. In the manual control
mounted operation. The two spectral irradiance calibration
maximum operating voltage of mode an alphanumerical four
banana sockets provided to procedure is listed in the Calibra-
26 V and a maximum lamp cur- line display shows the set-up
supply power to the lamp are tion Service chapter.
rent of 15 A. parameters. Manual set-up is
mounted so that they are
A high resolution 16 bit digital to accomplished via menu selec-
shielded from light and heat A BHO-10 carrying case is a re-
analog converter provides a high tion.
irradiation by the lamp. quired component for all BN-
level of lamp current control with The power supply is offered in a
The BN-
BN-LH250-
LH250-BC is qualified as LH250 standard lamp deliveries.
a resolution of 0.3 mA at the 1/2-19” housing which allows
a reference transfer standard.
nominal current of 15 A. The rack-mounting. For laboratory
The BC version of the BN-LH250 To power the BN-LH250 and BN-
current stability is specified at use an optional bench top hous-
undergoes a burn-in procedure LH250-BC lamps Gigahertz-
0.1x10-4 A at the nominal current ing is offered. Full specifications
where the lamp current, operat- Optik recommends the LPS-250 within 8 hours. An on/off ramp are listed in the Integrating
ing voltage and irradiance are lamp power supply which is function prevents lamp filament Spheres section.
documented during burn-in. The specially designed for the opera-
shock during the on/off proce-
Gigahertz-Optik calibration engi- tion of light emitting standards.
dure.

Typical Specifications and Ordering Information:

Model Lamp Spectral Irradiance at 50 cm in mW/(m² nm)
Type Power Voltage Current 250 nm 1100 nm 1800 nm Distance
@ 3100 K cm
BN-LH250 Halogen Lamp 250 W ~ 24 V 10.5 A 1.19 E-01 5.93 E+1 2.35 E+01 50
BN-LH250-BC Halogen Lamp with Burn-in Certificate
BHO-10 Hard case for up to 3 of BN-LH250. Required part for either BN-LH250 order.
BPC-2 Banana-plug cable with 2 m length. Available in red, blue and black color
LPS-250 Precise current controlled power supply. Current ramp function. RS232 or RS488 interface. 230 V / 50 Hz
LPS-250A Precise current controlled power supply. Current ramp function. RS232 or RS488 interface. 100 to 230 V / 50 to 60 Hz
BTH—19/2 1/2 19” width bench top housing for LPS-250 and LPS-250A
KLW-S1 Calibration of spectral Irradiance
 Calibration Standards & Uniform Light Sources - Page 133
Spectral Irradiance

BN-9101 & BN-0001: 1000W Spectral Irradiance Standard Lamps

BN-9101 & BN-0001 spectral ir- precision lamp socket for vertical
BN-0001
radiance standard lamps are light orientation.
precise spectral irradiance trans- Common features include hard-
fer standards for use in the wiring of the leads to the lamp
pins in order to reduce measure- BN-9101
wavelength range from 250 to
2500 nm. ment error caused by voltage
Both lamps feature a large di- drops across the connections.
ameter filament which is essen- Also lamp position is fixed in a
tial for a long operating life and temperature stable ceramic
stable irradiance. These 1000 W base.
spectral irradiance standard An optional transparent window
lamps have been supplied and target marks the position on the
calibrated by the Gigahertz-Optik filament used for the irradiance

used as reference standards. A Calibration of spectral irradiance

1,0 burn-in certificate is supplied with DKD certificate or traceable
with each qualified lamp. factory certificate is available
The BN-9101 is available in two through Gigahertz-Optik’s DIN
versions: EN ISO/IEC 17025 accredited
rel irradiance

• FEL type with filament support calibration laboratory. Descrip-

0,5 offers more intensity in the blue tions and specifications of the
and UV spectral range than the KLW-S1 and KLD-S1 spectral
Sylvania type irradiance calibrations is avail-
able in the Calibration Service
• Sylvania type is recommended section.
for universal use due to its
0,0 excellent long term stability.
250 500 750 1000 1250 1500 1750 2000 2250 2500
wavelength ( nm )
Set-up for Remote Control Operation
Typical Spectral Irradiance at 3100 K
calibration laboratory for optical
measurement quantities since
BN-9101
1991 and are in world wide use
or
in industrial and metrological
BN-0001
applications.
BN-9101: 1000 W FEL or Sylva-
Current
nia tungsten halogen lamp and
precision lamp socket for hori- calibration. This allows precision IEEE488
zontal light orientation.. alignment in the application or PC
BN-0001: 1000 W DXW tungsten for re-calibration.
halogen lamp mounted in a Each lamp undergoes a burn-in DMM-01
procedure with burn-in certifi-
cate. Several lamp parameters LPS-1000
Voltage
are documented by a on-line
data logger. By examination of
BN-9101
the burn-in data, only those
lamps which display the ex- LPS-Z01
BN-0001
pected trends are qualified to be

Typical Specifications and Ordering Information:

Model Lamp with Burn-in Certificate Spectral Irradiance at 70 cm in W/cm² nm-1
Typ Power Voltage Current 250 nm 1100 nm 2500 nm Distance
@ 3100 K cm
BN-9101-1 Halogen Lamp FEL Type 1000 W 110 V DC 8.000 A 0.11 mW/m² 116 mW/m² 18 mW/m² 70
BN-9101-2 Halogen Lamp Sylvania Type 1000 W 101 V DC 8.100 A 0.07 mW/m² 96 mW/m² 16 mW/m² 70
BN-0001 Halogen Lamp DXW Type 1000 W 115 V DC 8.000 A 0.18 mW/m² 219 mW/m² - 50
BN-9101Z-01 and BN-0001Z-01 Transparent cross-hair target for precise alignment onto the filament reference spot
BHO-10 Hard case for up to (3) BN-9101 and (2) BN-0001. Required part for BN lamp orders.
BPC-2 Banana-plug cable, 2 m length. Available in red, blue and black color
LPS-1000 Precise current controlled 1000 W power supply. Current ramp function. IEEE488 interface. 230 V / 50 Hz
LPS-Z01 High-power shunt resistor with DKD certificate for precise current measurements in combination with DMM-01
DMM-01 High resolution digital multimeter with IEEE488 interface and input port multiplexer
OS-LPS1000 Software to control and document BN-9101 & BN-0001 operation with LPS-1000, LPS-Z01 and DMM-01
KLD-S1 & KLW-S1 Calibration of spectral Irradiance with DKD or traceable factory certificate
Page 134 - Calibration Standards & Uniform Light Sources
Spectral Radiant Power & Luminous Flux

BN-0104: Spectral Radiant Power and Luminous Flux Standard Lamps

40

35

spectral radiant flux ( mW/nm)

30

25

20

15

10

0
350 400 450 500 550 600 650 700 750 800

wavelengt h ( nm )

Typical Spectral Radiant Power at 2856 K

LPS-250 Lamp Power Supply

The BN-0104 standard lamp is connector allows simple mount-

a precise transfer standard for ing and connection of the lamp
the quantities of spectral radiant to the UMLA-1.5B lamp adapter
power and luminous flux. base.
Carefully burned-in tungsten ha- The BN-0104 is available in three
logen lamps are mounted into a different power ranges.
UMLA-300 or UMLA-500 lamp Calibration of spectral radiant
adapter for use in the UMBB-300 power in W/nm within the wave-
and UMBB-500 integrating length range from 400 nm to The LPS-250 lamp power supply The RS232 or RS488 interface
spheres (see Integrating 1000 nm is supplied by Giga- is specially designed for stable enables full remote control op-
Spheres section). The holder and hertz-Optics calibration labora- operation of lamps. It offers a eration. In the manual control
lamp socket mounting plates are tory for optical radiation meas- maximum operating voltage of mode an alphanumerical four
coated with barium sulfate (ODP- urement quantities. 24 V and a maximum lamp cur- line display shows the set-up
97) with 97 % reflectance. The The standard lamps are supplied rent of 13 A. parameters. Manual set-up is
UMLA lamp holder’s PG type in a special carrying case which A high resolution 16 bit digital to accomplished via menu selec-
safely holds and protects the analog converter provides a high tion.
lamp and coated parts. level of lamp current control with The power supply is offered in a
a resolution of 0.3 mA at the 1/2-19” housing which allows
To power the BN series lamps nominal current of 13 A. The rack-mounting. For laboratory
Gigahertz-Optik recommends current stability is specified at use an optional bench top hous-
the LPS-250 lamp power supply 0.1x10-4 A at the nominal current ing is offered. Full specifications
which is specially designed for within 8 hours. An on/off ramp are listed in the Integrating
the operation of light emitting function prevents lamp filament Spheres section.
standards. shock during the on/off proce-
Carrying Case dure.

Typical Specifications and Ordering Information:

Model Lamp Spectral Radiant Power (mW/nm) Luminous
Type Power Voltage Current 400 nm 800 nm 1000 nm Flux (lm)

@ 2856 K
BN-0104-LH90 1) Halogen Lamp 90 W 12 V DC 7.17 A 2 37 - 1100
BN-0104-LH50 1) Halogen Lamp 50 W 12 V DC 4.16 A 1.11 20.55 - 550
BN-0104-LH35 1 ) Halogen Lamp 35 W 12 V DC 2,91 A 0.78 14.38 - 370
1) Lamp supplied in special carrying case mounted on lamp holder UMLA-300 or UMLA-500 for use in UMBB-300 or UMBB-500
BPC-2 Banana-plug cable, 2 m length. Available in red, blue and black color
LPS-250 Precise current controlled 250 W power supply. Current ramp function. RS232 or RS488 interface. 230 V / 50 Hz
LPS-250A Precise current controlled 250 W power supply. Current ramp function. RS232 or RS488 interface. 100 to 230 V / 50 to 60 Hz
BTH-19/2 19”/2 width bench top housing for LPS-250 and LPS-250A
KLW-S2 Calibration of spectral radiant power with calculated luminous flux
 Calibration Standards & Uniform Light Sources - Page 135
Spectral Radiance

BN-0102: Compact Spectral Radiance Standard Source

900

800
spectral radiance ( mW/(sr m² )

700

600

500

400

300

200

100

0
380 440 500 560 620 680 740 800 860 920 980 1040 1100

wavelengt h ( nm )

Typical Spectral Radiance

The BN-0102 standard source white diffuse reflecting plastic

is a precise spectral radiance material with excellent long term
transfer standard. Its compact stability.
size makes it ideal in applica- A carefully burned-in 5 W tung-
Dimensions
tions with limited space. sten halogen lamp operated in
The unit is built around a small constant current mode functions
diameter OP.DI.MA.* integrating as the light source.
sphere with a symmetrical The compact LCRT-2000 power
OP.DI.MA. baffle between lamp supply is specially designed to
and light output port. This offers run the BN-0102 lamp at a con-
the best possible uniformity stant current.
within the 20 mm diameter light Spectral radiance calibration is
emitting area. supplied by Gigahertz-Optik’s
The small diameter sphere in calibration laboratory for optical
combination with the large di- radiation measurement quanti-
ameter light port limits the use of ties and supported by a factory
the radiance standard to light calibration certificate.
detection systems having a nar-
row field-of-view. *Gigahertz-Optik’s Optically
OP.DI.MA. is a nearly perfect Diffuse Material

LCRT-2000: Lamp Power Supply

mode or light intensity controlled
1.06 mode (requires a reference de-
1.04 tector). The LCRT-2000 allows
1.02 temperature stabilization of four
25 external detectors at +40 oC to
25 avoid drift effects due to ambi-
20 ent temperature instability. One
20
15 of these detectors may be a
15 reference detector for the light
10 y / mm
x / mm 10 intensity control mode of the
The LCRT-2000 Lamp Power LCRT-2000. An additional output
5 5
Supply is designed to operate voltage for a cooling fan at the
lamps up to 10 W power. It can external lamp is available.
be operated in current controlled

Typical Specifications and Ordering Information:

Model Integrating Sphere Lamp Spectral Radiance (mW/m² sr nm) Luminance
Sphere Port Type Power Voltage Current 350 nm 1100 nm 2500 nm cd/m²
Diameter ( mm) @ 2700 K
BN-0102 40 20 Halogen Lamp 5W 12 V DC 417 mA 6 750 - 16000
LCRT-2000 Lamp power supply
KLD-S3 Calibration of spectral Radiance with traceable factory certificate
Page 136 - Calibration Standards & Uniform Light Sources
Spectral Radiance, Luminous and Uniformity

BN-ULS-M Series: Spectral Radiance, Luminance and Uniformity Standards

sphere. In-stock status of all External Sources are direc-
items limits the delivery time of tional lamps which transfer their
the spheres to the time of as- luminous flux through a sphere
sembly. port into the sphere. The advan-
Standard bench-top Sphere tage of this type of light source is
Stands are constructed using the ability to place light manipu-
modular aluminum rails that can lators like iris diaphragm attenu-
be easily customized to the indi- ators, optical filters and fast
vidual application. shutters into the light beam. The
Port Frames with free aperture restriction with this light source is
diameters from 0.5 in. (12.7 mm) the lower light intensity. Giga-
up to 5 in. (127 mm) provide the hertz-Optik’s unique lamp design
foundation for all accessory employing a diffuse reflector
components assembled to the offers high luminous flux effi-
sphere. ciency combined with a diffuse
Two different kinds of light sour- light input into the sphere. In
ces are available for assembly combination with its diffuse-
onto the port frames: baffle, light uniformities equal to
Internal Sources are positioned that of satellite sphere light
inside of the sphere. The advan- sources are achieved at higher
BN-ULS-500 with for internal lamps tage of this type of light source is light intensities.
that all of the luminous flux is
The BN-ULS-M Series radi- ports. emitted inside the sphere offer- Filter
ance, luminance and uniformity How high a luminance output is ing the highest possible light
standards offer the utmost flexi- required is the only selection intensity. Baffles are required to
bility in constructing a system to criteria for small diameter block direct illumination of the
individual customer require- spheres. light exit port by the internal
Integrating
ments. The design concept is A wide range of Sphere Acces- lamp. The resulting losses in Reflector
Sphere
based on providing the highest sory Components support uniformity and acceptance angle Iris Lamp
possible level specifications configuration of the basic can be reduced by the use of
multiple internal lamps. All available components for
the construction of standard light
source systems are described
and specified in the Integrating
Integrating Spheres section .
Sphere

Lamp

BN-ULS-300 with external lamp and remote controlled filter wheel

without adding more than is
needed. This modular approach
gives the customer exactly what
he requires without the added
cost of unnecessary parts.
Integrating Spheres with differ-
ent diameters from 4 in. (100
mm) up to 67 in. (1700 mm),
form the base units for each set-
up. The main selection criteria for
determining the sphere size is
how big the light emitting port
must be. A rule of thumb for the
maximum acceptable port di-
ameter is no more than 5 % of
the total sphere surface area
including detector and lamp BN-ULS-300 with 4 external lamp
 Calibration Standards & Uniform Light Sources - Page 137
Spectral Radiance, Luminance and Uniformity

BN-USM Series: Unit Construction System

Halogen Lamps are similar in calibration standard lamps.
construction to conventional gas Gigahertz-Optik supplies halo-
1,0
filled tungsten filament lamps gen lamps with and without UV-
except that a small trace amount blocking quartz envelopes. Note
of halogen is added. The addi- that lamps without UV blocking
tion of this halogen results in a exhibit a substantially shorter life
rel irradiance

regenerative cycle of the evapo- time.

0,5 rated tungsten. These lamps The following table shows the
exhibit: lamp specifications in combina-
• long operation time tion with different size Gigahertz-
Optik integrating spheres and
• broad band spectral radiation
lamp housings.
ranging from the UV through IR
For the precise operation of
0,0
250 500 750 1000 1250 1500 1750 2000 2250 2500
• stable light emittance charac- halogen lamps Gigahertz-Optik
wavelength ( nm )
teristic lamp power supplies are recom-
making them ideal for use as mended.
Typical Spectral Radiance
Typical Lamp and Light Source Specifications:
Halogen Lamp Inside Source Outside Source OS + Iris
Model Power UV Operation at Sphere Diameter Depending Illuminance in klx . Sphere Diameter in mm 1)
W Blocker V K 150 300 500 TC (K) 150 300 500 150 300 500 TC (K)
LH-5 5 ¥ 12 3100 13 3.3 1.2 2850 8.2 2 0.7 4.4 1 0.4 2800
LH-10 10 ¥ 12 3100 21 5.1 1.9 2850 11 2.9 1 6.6 1.6 0.6 2800
LH-35 35 ¥ 12 3100 97 24 8.9 2950 71 17 6.5 39 9.6 3.5 2900
LH-50 50 ¥ 12 3100 156 38 14 2950 116 28 10 62 15 5.6 2900
LH-75 75 ¥ 12 3100 248 61 22 2950 183 45 16 95 23 8.7 2900
LH-90 90 ¥ 12 3100 315 77 28 2950 237 58 21 122 29 11 2900
LH-10-UV 10 6 3100 25 6.2 2.3 3050 16 4.1 1.5 9.9 2.4 0.9 3000
LH-50-UV 50 12 3100 190 46.6 17 3050 143 35 13 77 18 7 3000
LH-100-UV 100 12 3100 436 107 39 3050 333 81 30 179 44 16 3000
LH-250-UV 250 24 3100 - - - - On Request
1) Typical values only. Illuminance (Luminance) may vary with port size and additional accessories. Please contact the company for more details

Light Detectors and Optometers LPS-250 Lamp Power Supply

Gigahertz-Optik offers a wide nous color detectors. The color

range of light detectors and temperature stabilization can be The LPS-250 lamp power supply 1/2-19” rack-mount housing.
optometers which can be com- done by manual or remote con- is specially designed for the For laboratory use an optional
bined with the integrating sphere trol current variation of the LPS- operation of halogen lamps. It bench top housing is available.
based light sources for precise 250 lamp power supply. If the offers a variable voltage from 0 Full specifications are shown in
radiance and luminance meas- intensity variation in color tem- to 24 V . A 16 bit digital to analog the Integrating Spheres chapter .
urement. perature controlled mode is not converter allows precise current
Temperature stabilized TD-11 acceptable, an iris diaphragm or set-up from 0 to 15 A with a
light detectors are the right motorized attenuator can be resolution of 0.3 mA. The current
choice to avoid drift in readings used to control the light output stability is specified at 0.1x10-4 A
caused by changes in ambient intensity. Complete remote con- at the nominal current over 8
temperature. trolled systems are offered by hours. An on/off ramp function
In applications that require long Gigahertz-Optik. prevents shock of the lamp fila-
term stability of the emission More information and specifica- ment during the on/off proce-
spectra, color temperature tions are available in the Light dure. RS232 or RS488 interface
controlled operation of the Detectors and Optometers sec- allows full remote control opera-
halogen lamp is possible using tions. tion of single and multiple units.
one of Gigahertz-Optik’s lumi- The power supply is offered in a
Page 138 - Calibration Standards & Uniform Light Sources
Spectral Radiance, Luminous and Uniformity

BN-ULS-K190: Spectral Radiance Standard

600

500

spectral radiance ( mW/(sr/m² nm)

400

300

200

The BN-
BN-ULS-
ULS-K190 spectral radi- found with elec-
ance standard offers high and tronically con- 100
controllable intensity and a uni- trolled intensity
form radiant output from 300 to methods.
2500 nm. To ensure high 0
The BN-ULS-K190 is built around intensity output 250 400 550 700 850 1000 1750 2500
a compact precision machined the halogen lamp
wavelength ( nm )
aluminum housing featuring an is placed within a
inlet made out of Gigahertz- diffuse reflector
Optik’s white diffuse plastic ma- for best flux cou- Typical Spectral Radiance at 100%, 75% and 50%
terial, OP.DI.MA. pling efficiency as
This material offers very good well as diffuse sphere illumina- A precise photometrically cor-
diffuse reflectance combined tion for high radiance uniformity rected reference detector is
with high spectral reflectance at the light output port. mounted to the integrating
sphere for connection to a Giga-
hertz-Optik optometer to read
out luminance values (see Op-
Integrating tometer chapter).
OP.DI.MA.
Sphere The lamp is operated by the
LPS-250 lamp power supply for
high resolution lamp current at three different intensity levels
Integrating Sphere control and long term stability is done by Gigahertz-Optics
Reflector (see Integrating Spheres chap- Calibration Laboratory and trace-
Lamp ter). ably confirmed in a factory cali-
Calibration of spectral radiance bration certificate.

Dimensions
a 238 c 210
Iris
Light Output Port
b 110
from 250 to 2500 nm. In com-
parison to barium sulfate coat- Dimensions ( mm ):
ings OP.DI.MA. exhibits greater a
irradiation stability in the ultravio-
let to infrared spectral ranges Pd

with better mechanical stability

as well.
Another key feature is that the
light source is externally posi- P1
tioned allowing the use of a vari-
able attenuator mounted be-
tween the lamp and sphere. An Pd
adjustable shutter eliminates
b c
changes in color temperature as
Typical Specifications and Ordering Information:
Integrating Sphere Light Source Radiance in mW/(m² sr nm)
Sphere ∅ Port ∅ Power Lamp Source Wavelength Iris 100 % Iris 75 % Iris 50 % CT
BN-ULS-K190-1 190 mm 50 mm 100 W Halogen LS-OK30 @ 1100 nm 1230 850 560 3050 K
BN-ULS-K190-2 190 mm 50 mm 50 W Halogen LS-OK30 @ 1100 nm 550 380 240 2800 K
Including LPS-250 power supply, VL-1101-2 light detector, P-9710-1 optometer, KLW-S3 calibration from 300 to 2500 nm at three dif-
ferent intensities (Iris 100%, 75% and 50% open) and luminance calibration of light detector.
 Calibration Standards & Uniform Light Sources - Page 139
Spectral Radiant Power and Irradiance Sensitivity

BN-DSR-100 Spectral Radiant Power Sensitivity Standard Detector

It’s 10 x 10 mm active area sili-
1,0
con photodiode is mounted in
the 37 mm diameter MD-37 type
detector housing. A machined V-
groove and side M6 threaded
hole are provided in the housing
rel. responsivity

0,5
for detector mounting. See Light
detector section for more details.
Photodiode linearity between
incident light and photocurrent
signal is up to 1 mA.
The spectral sensitivity range is gahertz-Optik’s P-9710 or X1,
0,0 200 to 1160 nm. X9 meters respectively are avail-
250 350 450 550 650 750 850 950 1050 1150 A 2 m long coaxial cable with able.
wavelength ( nm ) BNC connector enables the The BN-DSR-100 is available
detector to be used with an op- with either a DKD ISO-EN 17025
Typical Spectral Sensitivity
tometer or signal amplifier. Alter- calibration from 248,4 to 1160
The BN-DSR-100 calibration radiant power sensitivity in A/W natively a (type–2) calibration nm or with a factory calibration
standard detector is a precise in the wavelength range from data connector or (type–4) con- from 200 to 1100 nm. See Cali-
transfer standard for spectral 200 to 1160 nm. nector for compatibility with Gi- bration chapter for more details.

Typical Specifications and Ordering Information:

Model Photodiode Detector Calibration
Type Area Size mm Aperture Package Wavelength Range Unit
BN-DSR-100D Si 100 mm² 10 x 10 10 x 10 mm MD-37 1) A/W nm
BN-DSR-100F Si 100 mm² 10 x 10 10 x 10 mm MD-37 200-1100 nm in 10 nm steps 2) A/W nm
1) DKD calibration certificate . Calibration at 248.4; 265.3; 280.4; 289.4; 302.2; 313; 334.2; 366; from 380 to 1160 in 20 nm steps.
2) Factory calibration certificate

BN-DSI-33 Spectral Irradiance Standard Detector

1
relative sensitivity

0,5

0
250 350 450 550 650 750 850 950 1050 1150
wavelengt h ( nm )

Typical Spectral Sensitivity

The BN-DSI-33 calibration stan- V-groove and side M6 threaded A 2 m long coaxial cable with The BN-DSR-33 is available with
dard detector is a precise spec- hole allow mounting of the de- BNC connector enables the a calibration of its spectral irradi-
tral irradiance sensitivity [A/(W/ tector. The entrance window is detector to be used with an op- ance sensitivity from 250 to 1100
m²)] transfer standard for the composed of a spectrally neutral tometer or signal amplifier. Alter- with a factory certificate. See
wavelength range from 250 to broadband 11 mm diameter natively a (type–2) calibration Calibration chapter for more
1100 nm. RADIN* diffuser. data connector or (type–4) con- details.
The 33 mm² active area silicon The photodiode linearity between nector for compatibility with Gi-
photodiode is mounted in a 37 incident and detector signal is gahertz-Optik’s P-9710 or X1, * Gigahertz-Optik Radiation
mm diameter MD-37 type light up to 1 mA. The spectral sensi- X9 meters respectively are avail- Integrator
detector housing. A machined tivity range is 250 to 1100 nm. able.

Typical Specifications and Ordering Information:

Model Photodiode Detector Calibration 1)
Type Area Size mm Aperture Package Wavelength Range Unit
BN-DSI-33 Si+RADIN 33 mm² 5.6 x 5.6 11 mm ∅ RADIN MD-37 250-1100 nm in 10 nm steps A/(W/m²)
1) Relative spectral sensitivity absolute scaled at 555 nm
Page 140 - Calibration Standards & Uniform Light Sources
Spectral Reflectance

BN-R: Spectral Reflectance Standards

100

80

Reflectance ( % )
60

40

20

0
250 500 750 1000 1250 1500 1750 2000 2250 2500
Wavelength ( nm )

¡ Light and temperature Typical Spectral Reflectance of BN-R98, 70,50 and 03

stable highly durable PTFE tance and data-set. Data is sup- using 8°/hemispherical measure-
material plied over the spectral range ment geometry. Gigahertz-Optik
¡ Optimally diffuse reflectance from 250 nm to 2500 nm in 50 calibrations employ transfer
In many optical measurement (Lambertian reflector) nm increments. Optionally, finer standards traceable to the NRC
tasks, optically diffuse reflectors wavelength resolution is avail- National Research Council of
¡ Different reflectance of 98 %,
for system calibration and/or able. Calibration is performed Canada and NIST National Insti-
50 % and 3 %
adjustment are required. These
standards should exhibit a maxi- ¡ Spectrally neutral reflectance
mally diffuse pattern of reflection. of 98 % +/- 1 % from 400 to
Also, in applications involving 800 nm.
spectrally broadband light sour- Different Sizes of reflectance
ces and detectors the reflec- standards are offered.
tance characteristic of the stan- The BN-Rxx-D2 offers a reflec-
dard should be spectrally neutral tance of 2 in. (50.8 mm) diame-
across the entire spectral band- ter. A screw top cover protects
pass of interest. For calibration the reflectance surface during
of spectrophotometers the abso- storage and transportation.
lute spectral reflectance of the The BN-Rxx-SQ reflectance
standard must be known. standards are available in 2 x 2
Gigahertz-Optik’s BN-R Re- in. (50 x 50 mm) to 18 x 18 in.
flectance Standard fits this speci- (457 x 457 mm) sizes. All stan-
fication profile nearly perfectly. dards are supplied with a re-
The standard is made from moveable cap
OP.DI.MA. which stands for Each BN-R98-S5C Reflec-
Optically Diffuse Material and tance Standard can be ordered
features: with a calibration certificate that
includes a plot of spectral reflec-
BN-R50-SQ18, 18 x 18 inch reflectance
Typical Specifications and Ordering Information:
Model Reflecting Area Model 1) Reflectance Model 1) Reflectance Model 1) Reflectance
%
dimension
@ 555 nm @ 555 nm @ 555 nm
mm in
BN-R-D2 50.8 ∅ 2∅ BN-R98-D2 BN-R50-D2 BN-R02-D2
BN-R-SQ50 50 x 50 2x2 BN-R98-SQ50 - -
BN-R-SQ100 100 x 100 3.9 x 3.9 BN-R98-SQ100 - -
BN-R-SQ200 200 x 200 7.9 x 7.9 BN-R98-SQ200 98 +/- 1 % - 50 +/- 5 % - 3 +/- 1.5 %
BN-R-SQ300 300 x 300 11.8 x 11.8 BN-R98-SQ300 - -
BN-R-SQ5 129 x 129 5x5 BN-R98-SQ5 BN-R50-SQ5 BN-R02-SQ5
BN-R-SQ12 305 x 305 12 x 12 BN-R98-SQ12 BN-R50-SQ12 BN-R02-SQ12
BN-R-SQ18 2) 457 x 457 18 x 18 BN-R98-SQ18 BN-R50-SQ18 BN-R02-SQ18
1) Add –C to the model for calibration of the 8/D hemispherical reflectance from 250-2500 nm in 50 nm steps
2) The reflectance plate is build by two halfs
Optional calibration available in 1 nm steps with data on disk