RS-12D Series Calibration Light Source

The RS-12D Series consists of NIST Traceable sources that can be used as white light standards of spectral radiance or luminance. 

The base unit is supplied as an uncalibrated source, with calibration options including ISO 17025 calibration at maximum luminance, calibration at a user-specified Footlambert value, or via insertion of an optional filter/aperture assembly, can be incorporated into an NVIS display measurement system (please refer to model RS-12DN NVIS).

Full calibration, along with the appropriate calibration certificate is supplied with designated units, based on the requested option.



  • Sensor testing and calibration
  • Calibrate spectroradiometers, radiometers and photometers
  • Calibrate detector responsivity
  • Measure reflectance and transmittance


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Robust, Reliable and Traceable Calibration Solutions

  • Standard of spectral radiance and luminance
  • Correlated color temperature of 2856 K ±25 K
  • 3-inch diffuse exit diameter with ±3% uniformity
  • NIST Traceable
  • Optional calibration in Footlamberts
  • ANVIS output with 10c and 10AR options

RS-12D  Calibration Light Source

Calibrated Wavelength Range @ Data Interval

300-1100 nm @ 5 nm

Nominal Radiance of Diffuser

2.5 x 10-8 W/cm2*nm*sr at 380 nm

3.0 x 10-6 W/cm2*nm*sr at 550 nm

9.5 x 10-6 W/cm2*nm*sr at 800 nm

1.2 x 10-5 W/cm2*nm*sr at 1100 nm

Nominal Luminance of Diffuser

2398 cd/m2

700 fl (n-1 · cd/ft2)

Correlated Color Temperature (CCT)

2856 ± 25K

Uniformity of Diffuser

±3% over 65 mm

NIST Standards of Irradiance Output Uncertainty



197 mm (7.8 in) L x 216 mm (8.5 in) W x 203 mm (8.0 in) H          2.8 kg (6.25 lb)

Regulator Type

Constant current

Output Current

4A maximum

Current Accuracy, Long Term

Better than 0.5%

Temperature Range

15°C to 35°C

If NVIS display testing is required (ANVIS Radiance), please refer to model RS-12DN NVIS. Custom calibration options available.

Specifications are subject the change without notice.

RS-3A Lamp Monitor and Control

Regulation Type

Constant Current

Measurement Technique

Poggendorf Comparison Method


Null type (zero center)

Output Current

4A maximum

Current Accuracy, Long Term

Better than 0.05%


Better than 0.02%

Temperature Drift

< ± 0.25% / 10° C

Temperature Range

15 to 35° C


10 to 85% non-condensing


< ± 0.02% change for 10-volt line change

Thermal Drift After 8-min Warmup

< 0.01%

Current Ramp On / Off Time

Approximately 30 seconds

Power Consumption

90 Watts maximum

Input Line Voltage

105/125 VAC or 210/250 VAC    50/60 Hz


368 mm (14.5 in) L x 218 mm (8.6 in) W x 152 mm (6 in) H           5 kg (11 lbs)

Specifications are subject the change without notice.

Related Products

The RS-12DN is a NIST Traceable source that can be used as a white light standard of spectral radiance or luminance.  The insertion of the filter/aperture assembly transforms the unit into an NVIS display simulation source approximating a green cockpit display with a designed level of near infrar

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