A super wide field of view optical lens using only three low-cost optical materials

Abstract

The invention discloses a super-large-field angle optical lens made of only three low-cost optical materials. The super-large-field angle optical lens comprises six lens groups which include eight lenses, wherein the first lens group is a meniscus lens with negative focal power, the second lens group is a biconcave lens with negative focal power, the third lens group is a cemented lens which comprises a plano-convex lens and a concave-convex lens and has negative focal power, the fourth lens group is a plano-convex lens with positive focal power, the fifth lens group is a cemented lens which comprises a plano-concave lens and a concave-convex lens and has positive focal power, and the sixth lens group is a plano-convex lens with positive focal power. With the super-large-field angle optical lens of the present invention adopted, deficiencies in the prior art can be eliminated, and the costs of projection lenses can be decreased.

Description

technical field [0001] The invention relates to a lens structure, in particular to a super large viewing angle optical lens using only three low-cost optical materials. Background technique [0002] With the development of projection technology, various exhibition projects and dome theater projects have higher and higher requirements for projection lenses, especially for fisheye projection lenses with a large field of view. The projection of the upper dome screen, ring screen and special-shaped screen is mostly realized by the fusion technology of multiple projectors. Even if the fisheye projection lens is used, more than 10 kinds of optical materials are usually required to meet the use requirements, and the average unit price of materials is more than 200 yuan / kg , and the structure is relatively complicated. The lens structure generally requires about 10 lens groups and the number of lenses is more than 15 pieces. The cost is very high, so the cost of such engineering pro...

AI Technical Summary

Problems solved by technology

[0002] With the development of projection technology, various exhibition projects and dome theater projects have higher and higher requirements for projection lenses, especially for fisheye projection lenses with a large field of view. The projection of the upper dome screen, ring screen and special-shaped screen is mostly realized by the fusion technology of multiple projectors. Even if the fisheye projection lens is used, more than 10 kinds of optical materials are usually required to meet the use requirements, and the average unit price of materials is more than 200 yuan / kg , and the structure is relatively complicated, the lens structure generally requires about 10 lens groups and the number of lenses is more than 15, the cost is very high, so the cost of such engineering projects remains high

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