High-magnification high-resolution catadioptric telecentric lens

Abstract

The invention relates to a high-magnification high-resolution catadioptric telecentric lens which comprises a first reflector and a second reflector, wherein a first lens is arranged between an object plane and the first reflector, and a second lens, a third lens and a fourth lens are arranged between the first reflector and the second reflector; a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens are arranged between the second reflector and the image plane, and the first lens is a plano-convex lens protruding towards the image direction; the second lens is a plano-convex lens protruding towards the image direction; the third lens is glued with the fourth lens; the third lens is a biconvex lens; the fourth lens is a plano-concave lens which is concave towards the object direction; the fifth lens is glued with the sixth lens; the fifth lens is a concave plano-concave lens; the sixth lens is a biconvex lens; the seventh lens is glued with the eighth lens; the seventh lens is a biconvex lens; the eighth lens is a biconcave lens; and the ninth lens is a biconcave lens. The maximum magnification is 4 times, the maximum support of the target surface is 30 mm, and NA is greater than 1.5.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to a high-magnification and high-resolution reflection telecentric lens. Background technique [0002] With the rapid development of science and technology, lens imaging is applied to more and more fields, such as industrial automation detection, laser ranging, spectral measurement and many other fields. These fields have higher and higher requirements for lenses, requiring lens resolution High, large depth of field, wide applicable spectral range, achromatic, small size, strong versatility, large target surface, etc. [0003] At present, the maximum magnification of telecentric lens is generally 1-1.5 times, 2 times is relatively rare, NA (fiber numerical aperture) is generally below 0.1, and the target surface is generally less than 1 inch. For some new applications at present, magnification and resolution rate cannot meet the requirements. Contents of the invention [0004] The ...

AI Technical Summary

Problems solved by technology

[0003] At present, the maximum magnification of telecentric lens is generally 1-1.5 times, 2 times is relatively rare, NA (fiber numerical aperture) is generally below 0.1, and the target surface is generally less than 1 inch. For some new applications at present, magnification and resolution rate can not meet the requirements

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