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 infrared output against which a spectroradiometer or radiometer can be calibrated.

Three calibrations and certificates are supplied. First, a white-light source calibration is performed from 380 to 1100 nm. The second calibration is with the filter inserted with nominal luminance output of 45 footlamberts, and the third calibration is with the filter and aperture. Nominal output is 1 footlambert and 10-10 AR (Anvis Radiance).


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

Precision Calibration Solutions

  • Standard of spectral radiance and luminance
  • RS-12D white-light standard without NVIS requirements
  • Correlated color temperature of 2856 K ±25 K
  • 3-inch diffuse exit diameter with ±3% uniformity
  • ANVIS output with 10-10 AR
  • NIST Traceable

In addition to our exceptional technical and functional capabilities, Gamma Scientific is ISO/IEC 17025 accredited by NVLAP (NVLAP lab code 200823-0).

RS-12DN Uniform Light Source

Calibrated Wavelength Range @ Data Interval

380-1100 nm @ 5 nm

Calibrated NVIS Wavelength Range

380-930 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)

Nominal Luminance with ANVIS Filter

488 cd/m2

140 fl (n-1 · cd/ft2)

Nominal Luminance with ANVIS Filter and Low Level Aperture

6.6 cd/m2

1.9 fl (n-1 · cd/ft2)

Nominal NVIS “A” Radiance with ANVIS Filter and Low Level Aperture

450 x 10-10 NVIS “A” radiance

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

Specifications are subject to change without notice.


Options and accessories include a power brick, different sized apertures, and NVIS filter set to allow users to order lamp with custom output requirements.