Wide-angle high-magnification zoom lens multiplier with flange

A zoom lens and multiplier technology, applied in installation, optics, instruments, etc., can solve the problem that the field of view of the imaging system cannot reach the level of wide-angle, and the field of view is small, so as to achieve excellent imaging effect, no image cutting, compact effect

Active Publication Date: 2015-12-09
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing structural type of multiplier can only be used with a fixed focal length lens or a low-magnification zoom lens, and the field of view of the lens that can be adapted is relatively small. After it is expanded, the field of view of the imaging system It can't reach the level of wide angle

Method used

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  • Wide-angle high-magnification zoom lens multiplier with flange
  • Wide-angle high-magnification zoom lens multiplier with flange

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Experimental program
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Embodiment Construction

[0016] Such as Figure 1~2 As shown, a wide-angle high-magnification zoom lens multiplier with a flange, the optical system of the multiplier is provided with a front lens group A with a negative focal power and a focal power of Positive rear lens group B, the front lens group A is sequentially provided with a negative crescent lens A-1 and a biconcave lens A-2, and the rear lens group B is composed of a negative crescent lens B-1 and a biconvex lens A-2 Lens B-2 is a tightly bonded glued group; the mechanical structure of the multiplier includes a lens barrel 1, and the lens barrel 1 is provided with a front group mounting seat and a rear group mounting seat, and the lens barrel 1 is mounted on the front group mounting seat A flange 5 is extended outwards from the transition position between the rear mounting seat and the negative crescent lens A-1 and the biconcave lens A-2 are placed on the front mounting seat and pressed by the front pressure ring 2, Negative crescent len...

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Abstract

The invention relates to a teleconverter provided with a flange wide-angle high-power lens. A front lens group A and a back lens group B are arranged in sequence in an optical system along a light ray incidence direction from left to right, the front lens group A is provided with a negative crescent lens A-1 and a biconcave lens A-2 in sequence, and the back lens group B is a glued group formed by hermetically connecting a negative crescent lens B-1 and a biconvex lens B-2. A mechanical structure comprises a lens barrel, a front group mounting seat and a back group mounting seat are arranged in the lens barrel, a flange extends out of the lens barrel at a transition position between the front group mounting seat and the back group mounting seat, the front lens group A is placed on the front group mounting seat and is compressed by using a front pressure ring, the back lens group A is placed on the back group mounting seat and is compressed by using a back pressure ring, and an AB isolating ring is arranged between the biconcave lens A-2 and the negative crescent lens B-1. By adopting the teleconverter, the field angle of a zoom lens is enlarged, and a good imaging effect is achieved in the high-power zooming process of the zoom lens.

Description

technical field [0001] The invention relates to a video camera lens device, in particular to a wide-angle high-magnification zoom lens multiplier with a flange, and belongs to the field of photoelectric technology. Background technique [0002] The rapid development of science and technology and the gradual improvement of people's safety awareness have promoted the continuous progress of the security market. Nowadays, with the continuous maturity of advanced video compression coding technology, the rapid development of IP-based network transmission and the application of digital zoom technology, a series of high-definition cameras with 3 million and 5 million pixels have been launched on the market. However, in the process of network transmission and digital zooming, the clarity (that is, resolution) of the video will decrease to a certain extent, but at the same time, people's requirements for image resolution are getting higher and higher. The requirements for the field o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/177G02B7/02
Inventor 陈文静刘辉林平郑勇强
Owner FUJIAN FORECAM OPTICS CO LTD
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