Gamma Scientific has expanded their family of SpectralLED Tunable LED Light Sources for camera and image sensor calibration with a new system having a larger output port as well as increased output uniformity.
Specifically, the new SpectralLED RS-7-2 mates up to four LED light source engines together, with a 1-meter sphere that includes a 300-mm output port (other sphere and port sizes are available as well).
The result is a calibration light source for very large area detectors and large field of view cameras that delivers significantly higher brightness and radiometric stability of <0.1% and wavelength accuracy of 0.25 nm.
SpectralLED RS-7-2’s light engine
As with its smaller predecessor, the SpectralLED RS-7-2 utilizes a light engine consisting of 35 discrete LEDs, each having a different center wavelength that can be programed on-demand to reproduce the output of virtually any illuminant source (e.g., blackbody, daylight, fluorescent, LED, CIE illuminants) or the spectrum of any illuminant reflected by a target (such as a Macbeth or XRITE target).
The system can be swept through wavelengths to simulate a scanning monochromator, but with no moving parts. The SpectralLED RS-7-2 is user-friendly thanks to its simple firmware interface, which also contains a detailed calibration matrix for every LED channel. Plus, a combination of DC constant current drivers, optical feedback and thermoelectric cooling maintains high luminance accuracy in real time.
Tasks and applications
The SpectralLED RS-7-2 is suited for a range of detector and camera testing and calibration tasks that involve collecting light over a large area and/or a large field of view. From telescope or telephoto lenses for astronomical, spaceborne and aerospace applications, to fish-eye or wide-angle lens for virtual reality and other consumer applications, this product enables flat field calibration.
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