Light and miniature big-target-surface low-light lens and imaging method thereof

By setting specific lens combinations and air intervals in the low-light lens, the problem of designing a low-light lens with a large target surface is solved, aberration correction and lens miniaturization are achieved, and imaging quality and detection capabilities are improved.

CN108828753AInactive Publication Date: 2018-11-16FUJIAN FORECAM OPTICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUJIAN FORECAM OPTICS CO LTD
Filing Date
2018-09-04
Publication Date
2018-11-16
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing low-light lenses with large target surfaces are difficult to miniaturize in design, and the aberration correction caused by large apertures is difficult, resulting in complex lens structures, large tolerance burdens, and long debugging cycles, which affects production efficiency.

Method used

Use front lens group A and rear lens group C set along the incident direction of the light path, including a specific type and arrangement of lens combinations, to perform imaging through aperture B, and use air intervals and aspherical lenses for spherical aberration correction to reduce the number of lenses and systems length.

Benefits of technology

It effectively corrects the aberration of the optical system, improves the imaging quality, realizes the lightness and miniaturization of the lens, enhances the light collection and light transmission capabilities, is suitable for good detection capabilities in low illumination environments, and has high optical resolution and large field of view.

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Abstract

The invention relates to a light and miniature big-target-surface low-light lens, and the lens comprises a front lens group A, a diaphragm B and a rear lens group C, wherein the front lens group A, the diaphragm B and the rear lens group C are sequentially arranged in an incident direction of an optical path. The front lens group A includes a positive meniscus lens A1, a negative meniscus lens A2,a biconcave lens A3 and a biconvex lens A4, wherein the positive meniscus lens A1, the negative meniscus lens A2, the biconcave lens A3 and the biconvex lens A4 are sequentially arranged in an incident direction of the optical path. The biconcave lens A3 and the biconvex lens A4 are in close connection with each other as a first bonding group. The rear lens group C includes a biconcave lens C1, abiconvex lens C2, a biconvex lens C3, a plano-convex lens C4 and a negative meniscus lens C5, wherein the biconcave lens C1, the biconvex lens C2, the biconvex lens C3, the plano-convex lens C4 and the negative meniscus lens C5 are sequentially arranged in an incident direction of the optical path. The biconcave lens C1 and the biconvex lens C2 are in close connection with each other as a secondbonding group. The invention also relates to an imaging method of the lens. The lens is reasonable in design, effectively improves the imaging quality under the requirement of the large target surfaceof the lens, reduces the number of optical lenses, and realizes light and miniature lens. The lens has strong light collecting and light transmitting ability, and the target surface of the lens is large. The lens is high in optical resolution, is large in angle of view, and is large in observable range.
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