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Miniaturized large zoom ratio digital telephoto lens and its working method

A technology of large zoom ratio and telephoto lens, applied in installation, optics, instruments, etc., can solve the problems of blurred zoom image, low transmittance, small zoom ratio, etc., to achieve improved resolution and high transmittance , the effect of large zoom ratio

Active Publication Date: 2018-06-15
FUJIAN FORECAM OPTICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The optical structure of the traditional telescopic lens is composed of objective lens and eyepiece, but there are generally large volume, small zoom ratio, low transmittance, and blurred zoom image, which is not suitable for handheld observation.

Method used

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  • Miniaturized large zoom ratio digital telephoto lens and its working method
  • Miniaturized large zoom ratio digital telephoto lens and its working method
  • Miniaturized large zoom ratio digital telephoto lens and its working method

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Embodiment Construction

[0034] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

[0035] Such as Figure 1~9 As shown, a miniaturized digital telephoto lens with large zoom ratio includes a front group A with a positive focal power, a zoom group B with a negative focal power, and a focal Compensation group C with positive power, variable diaphragm assembly D and rear fixed group E with positive power, the front group A includes negative crescent lens A-1 and positive moon lens arranged along the incident direction of light from left to right Dental lens A-2, biconvex lens A-3 and positive crescent lens A-4, the negative crescent lens A-1 and the positive crescent lens A-2 are in close contact as the first cemented group, and the zoom group B includes Negative crescent lens B-1, biconcave lens B-2, and biconvex lens B-3 arranged from left to...

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Abstract

The invention relates to a miniaturized digital telescopic lens with large zoom ratio, which comprises a front group A with positive focal power, a zoom group B with negative focal power, and an optical focal Compensation group C with positive power, iris diaphragm assembly D and rear fixed group E with positive power; also relates to a working method of miniaturized digital telephoto lens with large zoom ratio, comprising the following steps: The front group A with positive refractive power, the zoom group B with negative refractive power, the compensation group C with positive refractive power, the variable diaphragm assembly D and the positive refractive power are set in the right direction of incidence The rear fixed group E, and adjust the electric focus, electric zoom and electric dimming. The invention not only has reasonable and compact structural design, but also realizes light weight and miniaturization, large zoom ratio, high transmittance, clear zoom image, long observation distance, and greatly improves the vibration and shock resistance of the lens.

Description

technical field [0001] The invention relates to a miniaturized large zoom ratio digital telescopic head and a working method thereof. Background technique [0002] At present, the digital telescopic lens requires small size, light weight, long observation distance and high definition. The optical structure of the traditional telescopic lens is composed of objective lens and eyepiece, but it generally has large volume, small zoom ratio, low transmittance, and blurred zoom image, which is not suitable for handheld observation. Contents of the invention [0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a miniaturized large zoom ratio digital telephoto lens and its working method, which is not only reasonable in structural design, but also efficient and convenient. [0004] In order to solve the above-mentioned technical problems, the technical solution of the present invention is: a kind of miniat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/173G02B7/04
CPCG02B7/04G02B15/173
Inventor 刘辉张清苏丘国雄张新彬
Owner FUJIAN FORECAM OPTICS CO LTD
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