DOUBLE-SPECTRUM OPTIC SYSTEM Russian patent published in 2011 - IPC G02B13/14 

FIELD: power industry.

SUBSTANCE: system includes common inlet channel, flat mirror with dichroic coating reflecting the spectrum range (0.5÷0.9) mcm and passing the spectrum range (8.0÷14.0) mcm, as well as two optic channels for each of spectrum ranges. Common inlet channel includes one component - positive meniscus. The second component of optic channel in direction (0.5÷0.9) mcm reflected from mirror with dichroic coating is negative lens, the third component is positive meniscus, the fourth component is negative meniscus and the fifth one is positive lens. The second component of optic channel in the direction (8.0÷14.0) mcm, which passes through mirror with dichroic coating, is negative lens. Thickness of mirror with dichroic coating corresponds to the ratio: d₃<0.1(d₂+d₄), where d₃ - thickness of mirror with dichroic coating; d₂ - distance between positive meniscus of common inlet channel and mirror with dichroic coating; d₄ - distance between mirror with dichroic coating and the first component of optic channel in the direction (8.0÷14.0) mcm passing through this mirror.

EFFECT: increasing optical efficiency of both channels and simplifying the technology at maintaining high optical characteristics.

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