Wide-angle telephoto imaging optical system

An optical system and wide-angle technology, which is applied in the field of wide-angle imaging optical systems, can solve the problems of short focal length, reduced field of view angle of zoom lens, and increased cost, and achieve the effect of increased field of view, effective focal length, and large total focal length

Active Publication Date: 2020-12-11
北京华力必维科技股份有限公司 +4
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] Existing optical imaging systems have deficiencies in field of view and focal length. For example, the wide-angle single-focus lens disclosed in CN102621667A has a field of view of 71° and an effective focal length of only 5.8 mm. The field of view is not large enough and the focal length is relatively short; In CN206411328U, although the field of view is increased to 95°, the focal length

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  • Wide-angle telephoto imaging optical system
  • Wide-angle telephoto imaging optical system
  • Wide-angle telephoto imaging optical system

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Embodiment Construction

[0040] Below, refer to the attached Figure 1-2 Embodiments of the present disclosure will be described in detail.

[0041] figure 1 is a configuration diagram of the wide-angle imaging optical system according to the first exemplary embodiment of the present disclosure. In this specification, the numerical value of the radius of curvature, the numerical value of the thickness, and the numerical value of the thickness of the lens may all be mm.

[0042] According to the wide-angle telephoto imaging optical system of the present disclosure, it is composed of a front lens group G1 and a rear lens group G2 arranged in sequence from the object side to the image side; wherein the front lens group G1 is composed of the first lens L1, the second lens L2 and the The third lens L3 is composed; the rear lens group G2 is composed of the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7, and the aperture is located between the front lens group G1 and the rear ...

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Abstract

A wide-angle telephoto imaging optical system is composed of a front lens group with negative focal power and a rear lens group with positive focal power which are sequentially arranged from an objectside to an image side. The front lens group is composed of a negative first lens, a negative second lens and a positive third lens. The rear lens group is composed of a positive fourth lens, a negative fifth lens, a positive sixth lens and a negative seventh lens. A diaphragm is located between the front lens group and the rear lens group. The imaging system meeting the conditional expression ofthe invention can obtain a larger focal length while meeting a larger field angle.

Description

technical field [0001] The invention relates to an imaging optical system, in particular to a wide-angle imaging optical system with a relatively large focal length. Background technique [0002] Existing optical imaging systems have deficiencies in field of view and focal length. For example, the wide-angle single-focus lens disclosed in CN102621667A has a field of view of 71° and an effective focal length of only 5.8 mm. The field of view is not large enough and the focal length is relatively short; In CN206411328U, although the field of view is increased to 95°, the focal length is only 3.61mm. When applied to monitoring, although a larger viewing angle image can be taken, it cannot be focused on a slightly distant object and cannot obtain a clear image. Therefore, in In many cases, the application is limited. Although a zoom lens can be used, its cost will increase significantly, and the field of view angle will be greatly reduced when the zoom lens becomes a telephoto ...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/00G02B13/06G02B13/18
Inventor 王翠莲
Owner 北京华力必维科技股份有限公司
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