LED lighting device compatible with night vision devices
AssigneeSchott AG
InventorsRalf Biertuempfel, Steffen Reichel, Michael Landi
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AssigneeSchott AG
InventorsRalf Biertuempfel, Steffen Reichel, Michael Landi
Estimating the term…
A lighting device is provided that includes an LED and an NIR filter for a control panel or a display, which does not interfere with a night vision device. The light of the LED is in an area of u′>0.19 and v′>0.46 of the u′v′ diagram of the CIE-LUV chromaticity diagram. The NIR filter exhibits descending light transmittance between 500 nm and 800 nm. The thickness of the NIR filter is chosen so that a sufficient blocking effect is provided in a range of wavelengths between 600 nm and 800 nm, so that the color coordinates of the filtered useful light are in an area with a radius of 0.04 around coordinates u′=0.19 and v′=0.49 of the u′v′ diagram.
A lighting device for illuminating a control panel or a display with light that does not interfere with operation of a night vision device whose spectral sensitivity is in a range of wavelengths above 600 nm, comprising:
Dependencies are inferred from the claim text.