HIGH-POWER RADIATION-RESISTANT LENS Russian patent published in 2022 - IPC G02B9/62 

FIELD: optical equipment.

SUBSTANCE: invention can be used in optical devices that require a large rear focal length. A high-power lens consists of three components and an active diaphragm located between the second and third components. The first component is made of a single negative meniscus, with concavity facing the image, and a single biconvex lens. The second component is made in the form of a biconcave lens glued together from a positive meniscus with concavity facing the object and a biconcave lens. The third component consists of two positive separate lenses in the form of a positive meniscus, with convexity facing the image, and a biconvex lens and a meniscus located with concavity facing the image and glued from biconvex and biconvex lenses. The correlations given in the invention formula are performed.

EFFECT: increase in the field of view, an increase in image quality, a shift of the spectral range to the visible region from 0.485 to 0.760 mcm, a decrease in size, an increase in the rear segment.

1 cl, 4 dwg