HIGH-SPEED LENS Russian patent published in 2009 - IPC G02B9/34 G02B13/14 

FIELD: physics; optics.

SUBSTANCE: present invention can be used in thermal imaging devices. The high-speed lens contains four components and an aperture diaphragm, located after the fourth component. The first component is a positive meniscus, whose concave surface faces the image space. The second component is negative meniscus, whose concave surface faces the image space. The third component is negative meniscus, the concave surface of which faces image space and the fourth is a positive lens. The distance between the second and third components is not less than 0.45 times the focal length of the lens.

EFFECT: design of a high-speed lens with high quality of image without vignetting.

3 cl, 3 dwg