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Small-distortion, small-volume, high-illumination and high-resolution optical system

A high-resolution, optical system technology, applied in the field of optical systems, can solve the problems of large volume, large distortion, low illumination, etc., and achieve the effect of low edge resolution, high edge resolution, and small lens volume

Active Publication Date: 2010-03-10
UNION OPTECH
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the shortcomings of the prior art such as large distortion, large volume, and low illumination, and provides an optical system with small distortion, small volume, high illumination, and high resolution

Method used

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  • Small-distortion, small-volume, high-illumination and high-resolution optical system

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Embodiment Construction

[0011] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0012] An optical system with small distortion, small volume, high illuminance, and high resolution, comprising a first lens 1, a second lens 2, a third lens 3, and a fourth lens 4 arranged in sequence. A diaphragm 6 is provided between the four lenses 4, the first lens 1 and the third lens 3 are spherical lenses made of glass materials, and the second lens 2 and the fourth lens 4 are aspheric lenses made of optical plastic materials. The focal lengths of the first lens 1, the third lens 3 and the fourth lens 4 are positive, the focal length of the second lens 2 is negative, and the second surface 8 of the second lens 2 is curved toward the image plane, as shown in the figure Show.

[0013] The small distortion is mainly achieved by the following four methods: 1. The second lens 2 adopts a negative lens with a larger curvature; 2. An aspheric surface ...

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Abstract

The invention relates to a small-distortion, small-volume, high-illumination and high-resolution optical system, which solves the problems of large distortion, large volume, small illumination, low resolution and the like, and comprises a first lend, a second lens, a third lens and a fourth lens, wherein the first lens, the second lens, the third lens and the fourth lens are arranged sequentially; an aperture is arranged between the third lens and the fourth lens; the first and third lenses are spherical lenses; the second and fourth lenses are non-spherical lenses; the first and third lensesare made of glass; and the second and the fourth lenses are made of plastic. The optical system is mainly used in the fields such as monitoring, photographic and vehicle-mounted systems.

Description

【Technical Field】 [0001] The invention relates to an optical system, in particular to an optical system with small distortion, small volume, high illuminance, and high resolution applied to monitoring, camera, and vehicle-mounted systems. 【Background technique】 [0002] At present, large field of view or medium field of view lenses used in photography, security, and vehicle-mounted vehicles generally have such shortcomings: large lens distortion; large size; low edge contrast; low resolution. There are only a few lenses now, and one aspect is improved at the expense of other aspects. For example, in order to achieve high edge illumination, it is necessary to make the distortion larger and the volume larger. There is no lens that overcomes all the above shortcomings. Therefore, the popular medium-field or large-field-of-view lenses for cameras, security, and vehicles on the market now have high cost, large volume and distortion, and low edge contrast. This has great inconvenienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B9/34
Inventor 李建华肖明志
Owner UNION OPTECH
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