Calibration Light Sources

5000-16C
The Model 5000-16C 1000-watt FEL Lamp Standard provides absolute calibration of spectral irradiance from 250 nm to 2.5 microns. This tungsten-halogen lamp standard bears the ANSI designation of FEL. It has been selected by the National Institute of Standards and Technology to replace the 1000-watt, DXW standard. It is calibrated to the 1973 NIST spectral irradiance scale, while the DXW standard is calibrated to the 1965 NIST Scale.

Lamp calibration is directly traceable to the National Institute of Standards and Technology by incorporating two NIST spectral irradiance scales. This results in estimated accuracies of 2.4% at 250 nm, 1.8% at 450 nm and 1.5% over the range from 555 to 1600 nm. The 1965 NIST Scale of spectral irradiance is used over the spectral range from 1700- to 2500-nm. NIST uncertainty over this wavelength region is approximately 3%. There is no appreciable degradation of accuracy in the Gamma Scientific transfer calibration process.

• Quartz halogen, ANSI Type FEL, 1000-watt lamp
• – 8.3 amp operating current
• Spectral irradiance, 193 tabulated points consisting of:
  • 34 direct transfer points
  • 159 derived points
• 250 to 2500 nm spectral range

RS-10B
The RS-10B calibration light source is a precision source of radiant flux, used primarily to calibrate light-measuring instrumentation and as stimuli to measure detection devices.

Conservative design and rigid quality standards make Gamma Scientific sources the ones by which others are judged. They may be used as standards of irradiance or radiance, traceable to the National Institute of Standards Technology (NIST).

Near-constant radiant flux output is achieved via exclusive use of tungsten-halogen lamps. Ultra-stable, constant-current supplies utilize precision shunt-current measurement and comparison circuits built into the source housing.

With RS-70-X accessories, RS-Series light sources provide an absolute reference for producing standard outputs in a complete range of luminance, illuminance, spectral-radiance and spectral-irradiance units. Additional special filters and attenuators enable generation of different color temperatures, spectral outputs and intensities. Calibrations in photometric and/or spectroradiometric units are supplied and are traceable to NIST.

• NIST traceable
• Built-in timer shows elapsed time
• 200-hour calibration/one year
• Calibrate spectroradiometers, radiometers and photometers
• Calibrate detector responsivity
• Measure reflectance and transmittance
• Tungsten-halogen lamps for stable output
• Calibration reports in units of luminance, illuminance, radiance and irradiance

RS-12
The RS-12 is a versatile NIST-traceable calibration light source. Use it as a white-light standard of spectral radiance or luminance. Or, employ its filter/aperture assembly for an NVIS display simulation source approximating a green cockpit display with optimal near-infrared output against which a spectroradiometer or radiometer can be calibrated.

Lower near-infrared output from the tungsten-halogen lamp reduces the effects of stray light within the monochromator portion of a spectroradiometer. The RS-12 has a three-inch exit diameter with uniformity of ±3%.

Three calibrations and certificates are supplied. First, a white-light source calibration is performed from 380 to 1100 nm. Nominal luminance output is 700 footlamberts and correlated color temperature is set at 2856 K ± 25 K. The second calibration is with the filter inserted with nominal luminance output of 45 footlamberts. The third calibration is with the filter and aperture. Nominal output is 1 footlambert and 10-10 AR (Anvis Radiance).

• Standard of spectral radiance and luminance
• RS-12B 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

RS-50

The RS-50 projection light source is a precision source of radiant flux, used primarily to calibrate light-measuring instrumentation and as stimuli to measure detection devices.

Conservative design and rigid quality standards make Gamma Scientific sources the ones by which others are judged. They may be used as standards of irradiance or radiance, traceable to the National Institute of Standards Technology (NIST).

Near-constant radiant flux output is achieved via exclusive use of tungsten-halogen lamps. Ultra-stable, constant-current supplies utilize precision shunt-current measurement and comparison circuits built into the source housing.

Generate irradiance levels from six to 30 meters, or uniformly illuminate areas 46 cm or more in diameter. Source calibration is provided at a distance from the exit pupil. Beyond six meters, the source demonstrates point-source characteristics; approximate illuminance and irradiance levels may be generated by the inverse-square law.

Alternately, use the RS-50 uncalibrated for illuminating various materials. Correlated color temperature is set at CIE Illuminant A or 2856 ±20 K. The illumination area is easily varied by changing the field-aperture stop.

• NIST traceable
• Built-in timer shows elapsed time
• 200-hour calibration/one year
• Calibrate spectroradiometers, radiometers and photometers
• Calibrate detector responsivity
• Illuminate various materials
• Measure reflectance and transmittance
• Tungsten-halogen lamps for stable output
• Calibration reports in units of luminance, illuminance, radiance and irradiance