COLLIMATOR LENS Russian patent published in 2014 - IPC G02B27/30 G02B17/08 

FIELD: instrument making.

SUBSTANCE: invention relates to collimator lenses, operating in medium IR-range of wavelengths (for spectral range from 3 to 5 mcm) and may be used in thermal imaging collimators or in receiving thermal imaging lenses (in return flow of beams) in different devices. The collimator lens comprises three components, besides, the first component along the travel of the beams is made in the form of a mirror, facing with a bulge to the plane of objects, the second component is made in the form of a single negative meniscus lens with a hole in the centre, facing with a bulge towards the plane of objects, besides, its concave surface has a mirror inner coating and it is arranged between the first component and the plane of objects, and the third meniscus lens facing with a bulge to the image and arranged between the first component and the image, the second and third components are made of zinc selenide, and in the first component the mirror coating is applied onto the convex surface of the mirror. Besides, the radius of the spherical optical reflecting surface of the mirror of the first component by modulus is equal to the radius of the convex surface of the third component.

EFFECT: increased relative hole, increased focus distance at simplified design, higher manufacturability and high quality of an image.

2 cl, 1 dwg, 2 tbl