Optical arrangement for illuminating an object with the light of

Details Optical arrangement for illuminating an object with the light of Optical arrangement for illuminating an object with the light of

1974-11-08

1976-03-30

Willis, Davis L.

G02B 2714

Patent

active

039470920

ABSTRACT:
A light beam splitter comprises a light transmissive support which comprises a colored glass having an absorption edge spectrally limiting the reflection of the light splitter. A multilayer interference coating is applied to the colored glass and it includes two adjacent filter spectral region working ranges and it transmits one spectral region of one filter working range and reflects the other adjacent working range. The interference coating has a ratio of optical thickness of the low refraction to the high refractive layers of from 1 to 2 to 1 to 9. The colored glass support is advantageously formed with an absorption edge at the short wave side of the wave length centroid of the spectral region to be reflected by the light splitter.

REFERENCES:
patent: 3623797 (1971-11-01), Daw
patent: 3726192 (1973-04-01), Dalton
patent: 3860813 (1975-01-01), Herzog et al.

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