DOUBLE-SPECTRAL OPTICAL SYSTEM Russian patent published in 2019 - IPC G02B23/04 G02B13/14 

FIELD: optics.

SUBSTANCE: optical system can be used in heat and television surveillance and aiming devices. Optical system includes a common input channel, which contains a negative meniscus, a plane-parallel plate with dichroic coating on the first surface, which reflects spectral range (0.6÷1.0) mcm and transmitting spectral range (8.0÷14.0) mcm, two optical channels for each of the spectral bands. Optical channel for (0.6÷1.0) mcm contains a positive and a negative lens, a reflecting mirror, a glued negative and a positive lens, an aperture diaphragm and a negative meniscus whose convex surface faces the object. Optical channel for (8.0÷14.0) mcm contains an aperture diaphragm, positive and negative lenses. Ratio is as follows: F_TP=(0.5÷1.5)⋅F_TV⋅d_TP/d_TV, where F_TP, F_TV – focal distances of optical channels (8.0÷14.0) and (0.6÷1.0) mcm; d_TP , d_TV – pixel dimensions of ph/receivers of optical channels (8.0÷14.0) and (0.6÷1.0) mcm.

EFFECT: fewer optical components in the thermal imaging channel, wider angular field of view of both channels while maintaining high optical characteristics.

1 cl, 1 dwg, 1 tbl