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 a calibrated 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

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

380-1100 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.

Options and accessories include a power brick, ND-filters and different sized apertures which allows users to order lamp with specific output data