Note: The RAD-900 Radiometer and BBS-200 Blackbody Source instruments are sold as accessories to the I-SITE Camera Testing System.
The RAD-900 Radiometer makes precise measurements of radiometric temperature and spectral radiance. It operates in both the MWIR and LWIR bands and may be used to carry out both 1D and 2D source radiance measurements when installed on the ASB-920 Angular Scan Base. Through its calibration, the RAD-900 provides traceability to national standards and to the International Temperature Scale. Most thermal Target Generators are factory calibrated to provide precise physical temperature differences between their foreground and background, but the reflective or refractive collimators with which they are typically paired attenuate the radiation form these target generators, making the thermal contrast of the target appear smaller than the physical difference.
The RAD-900 provides an accurate means to perform a radiometric calibration for a thermal target generation system by accurately measuring the radiometric temperature difference of the target as a function of the physical temperature difference. In this role, it is an essential component of a complete thermal imager testing laboratory.
- Uniformity and temporal stability testing of infrared sources
- Absolute calibration of collimated infrared test targets
- Calibration of radiometric vs physical temperature differences for collimated thermal targets with first and second order fitting
- NIST traceable radiometric calibration
- Absolute accuracy up to 0.1°C
- Serves as a cavity blackbody transfer standard for calibrating infrared sources
- State-of-the-art resolution and sensitivity
- Minimum Resolvable Temperature Difference (MRTD): 0.002°C
- Angular resolution (Instantaneous Field of View) I mRad / 0.05°C
- Tool-free interchangeability of objective optics using proprietary bayonet mount
- Tool-free interchangeability of detectors
- 12 position motorized filter wheel for broad and narrow-band filters
- Automatically compensates for changes in ambient temperature
- Built-in infrared verification source for checking the calibration status
- Boresighted camera and visible laser to aid in the pointing of the radiometer at the target region of interest and for the placement of the radiometer entrance pupil with collimated beam
- No external electronics control unit. Power is supplied from a single low voltage brick and all control is carried out from a laptop or desktop computer via a single USB cable
- Shipped in a sealed flight case for secure shipping and storage
The RAD-900 Radiometer consists of dual band infrared detection and dedicated signal processing. Radiation from the target is focused onto the detector by an objective lens. A reflective chopper alternately exposes the detector to this radiation and the radiation from an internal blackbody. The temperature of the blackbody is monitored by a sensor and is transmitted with the detector signal to a computer for analysis.The radiometric temperature (or radiance) of the target is then calculated and displayed.
A built-in utility facilitates calibration in the TTG-100 Thermal Test Target Generator.
RAD-900 Radiometer can be calibrated using the BBS-200 Black Body Source as an absolute radiometric standard.
|Spectral range||3-5 μm|
|Detectors||3-5 μm LN2 cooled InSb
8-12 μm LN2 cooled HgCdTe
|Field of view||0.9 mrad FWHM|
|Lens aperture||100 mm|
|Lens material 3-5 μm||Silicon|
|Lens material 8-12 μm||Germanium|
|Physical||W 200 mm x H 240 mm x D 340 mm (14 kg)|
|Temp range||Ambient ± 50°C|
|Calibrated temperature range||5°C – 70°C|
|Temp accuracy||Better than ± 0.7°C|
|Temp resolution||± 0.01°C|
Electronic control unit
|Power||110/220 VAC 50/60 Hz (specify when ordering)|
|Physical||W 520 mm x H 310 mm x D 510 mm (28 kg)|
A complete Optikos Radiometer System is supplied with the following items:
- Two detector assemblies
- Two objective lenses
- Set of twelve spectral filters in a manual filter wheel
- Electronic control unit
- Computer system
- ScanIRR software
ABS-920 Angular Scan Base
The ABS-920 fits under the optical head and enables it to be scanned in
azimuth and elevation about axes of rotation located at the entrance pupil
of the optical head.
|Range||± 1.5° horizontal
± 1.5° vertical
RAD-900 with Angular Scan Base