METHOD OF THREE-COLOUR MIRROR-LENS COLLIMATORS-APOCHROMATS CONSTRUCTING Russian patent published in 2025 - IPC G02B17/08 

FIELD: optics.

SUBSTANCE: invention relates to the field of optical instrument making and can be used to create transmitting lenses for collimator-type optoelectronic systems that form an imaginary image of objects at infinity behind them, for checking alignment of spectral channels and image quality of multispectral optoelectronic system of look-up type. Method of constructing three-colour mirror-lens collimator-apochromats is characterized by that the spectrum divider used is a beam-dividing lens, one of the surfaces of which also acts as the secondary mirror of the mirror lens, the focal planes of the two channels are combined into one and the exit pupils of the channels are spaced apart. Pupil of the visible channel lies inside the central shielding zone of the infrared channel.

EFFECT: high transmission coefficient of the optical system, superposition of focal planes of spectral channels, high quality of correcting chromatic aberrations in two spectral subranges, easier assembling and adjustment.

1 cl, 3 dwg