OPTICAL SYSTEM Russian patent published in 2010 - IPC G02B23/00 

FIELD: physics, optics.

SUBSTANCE: invention relates to optical systems for viewing remote objects with formation of an image on a CCD matrix. The optical system consists of optically connected head objective lens consisting of three components and spectrum-splitting unit made with possibility of transmitting radiation with wavelength of 1570 nm and 1067 nm and reflecting radiation in the wavelength range from 500 nm to 850 nm, and also has a collecting lens, light filters and a matching objective lens, placed behind the spectrum-splitting unit along the path of the reflected beam. The collecting lens lies in the focal plane of the head objective lens and is made in form of a biconvex lens. The matching objective lens consists of six components. The first component is in form of a biconvex lens, the second is in form of a positive meniscus, the third is in form of a negative meniscus, the fourth is a negative meniscus made from biconcave and a biconvex lens glued together and the fifth and sixth elements are in form of a biconvex lens. The first component of the head objective lens is made in form of a negative meniscus. Converging lenses of the second and third components of the head objective lens are made from a biconvex and a negative meniscus glued together.

EFFECT: improved image quality with widening of the field of vision and simultaneous increase in range of the entrance pupil.

6 dwg, 2 cl