Continuous zoom eyepiece

A technology of magnification eyepiece and zoom group, which is applied in the field of visual optical devices, can solve the problems of short exit pupil distance, poor aberration correction, and unsatisfactory clarity, etc., to achieve aberration correction, aberration correction, effective Good for craftsmanship

Active Publication Date: 2013-01-30
WUZHOU OKA OPTICAL INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a continuous zoom eyepiece, which can solve the problems of poor aberration correction, unsatisfactory definition and short exit pupil distance existing in the existing 10x to 20x zoom eyepieces. question

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

[0028] figure 1 The zoom range of the continuous zoom eyepiece shown is 12.5-25mm, the achievable continuous zoom range is 20 times-10 times, and the zoom ratio is 2:1; it includes a fixed group I fixed at one end of the lens barrel and a Two movable components moving in the lens barrel, the two movable components are divided into zoom group II and compensation group III, fixed group I, zoom group II and compensation group III are arranged in sequence along the optical axis from the observation side, fixed group I and the zoom group II are arranged between the aperture diaphragm 1 and the field diaphragm 2, and the two movable components move axially along the optical axis to realize zooming. The focal power of compensation group III is negative, which belongs to the negative group compensation zoom system. The fixed group I takes positive optical pow...

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Abstract

The invention discloses a continuous zoom eyepiece and relates to the technical field of optical elements. The continuous zoom eyepiece comprises a fixed group with positive focal power, a zoom group with the positive focal power and a compensation group with negative focal power, which are sequentially arranged from the observation side along an optical axis, wherein the zoom group and the compensation group are of movable group components, the fixed group and the zoom group are arranged between an aperture diaphragm and a field diaphragm, the zoom group is constituted by two identical positive lenses, and the compensation group is of a negative lens and can meet the conditions that fI is more than 37mm and less than 42mm, fII is more than 28mm and less than 33mm, and fIII is more than -51mm and less than -47mm, in which fI is the focal length of the fixed group, fII is the focal length of the zoom group, and fIII is the focal length of the compensation group. Compared with the prior art, the continuous zoom eyepiece disclosed by the invention has the advantages of high definition, excellent optical image quality, excellent aberration correction, multiple reality and good process performances.

Description

technical field [0001] The invention relates to the technical field of optical elements, in particular to a visual optical device for observing images formed by a front optical system. Background technique [0002] The eyepiece is an integral part of the optical vision instrument. Its function is to image the image formed by the objective lens at infinity (or the distance of clear vision) through it, and form a magnified image on the observer's retina. Traditional eyepieces have a fixed multiple, that is to say, the focal length is a fixed value, such as 10x and 20x eyepieces, and their focal lengths are 25mm and 12.5mm respectively. When using this type of visual optical instrument installed with a fixed magnification eyepiece for observation, if you want to obtain different magnifications, you need to replace the eyepieces with different magnifications, which brings relative inconvenience to the operation. The focal length of the zoom eyepiece can be changed continuously,...

Claims

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Application Information

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IPC IPC(8): G02B25/00G02B7/04G02B1/00
Inventor 陈群梁小英高思颖李绮丽
Owner WUZHOU OKA OPTICAL INSTR
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