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VOLUME -24 NUMBER 3
Publication Date: 03/1/2009
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March 2009 Issue
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Low-Level Light Detector from Gigahertz-Optic
Low level light detector.
Newburyport MA — A new photometric detector — the VL-6000 — with a large diameter front lens for high sensitivity illuminance measurement, has been developed by Gigahertz-Optik for night vision applications, sleep studies, sky light simulation, zoological night habit studies and general low light level photometry.
The device uses a large-area low-noise Silicon photodiode with a precise photometric correction filter (f1' <5 percent) and front barrel housing a 50mm diameter achromatic corrected lens.
In combination with the company's single or multi-channel optometer illuminance resolution is less than 1 microlux (50 µlx with a signal-to-noise ratio of 50). For comparison, starlight illuminance is about one millilux.
Certification of absolute calibration in amperes/lux (typical sensitivity 477nA/lx) including relative spectral responsivity plot is supplied for each detector. Optional calibration in cd/m} for luminance measurements (typical luminance sensitivity 0.3 nA/cd/m
) is also available. The VL-6000 field of view is 1.72°.
Contact: Gigahertz-Optik, Inc., 5 Perry Way, Newburyport MA 01950
978-462-1818 fax: 978-462-3677 E-mail: email@example.com Web:
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