Method for improving focusing precision of zoom optical system

An optical system and focusing technology, which is applied in the field of optimal design of the zoom optical system, can solve the problems of insufficient improvement of focusing precision, slow focusing, and failure to take into account the amount of focusing at the same time, so as to ensure accuracy and reduce the amount of focusing , Conducive to the effect of fast focusing

Active Publication Date: 2020-09-11
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to solve the technical problems that the existing method for improving the focusing precision does not take into account the focusing amount at the same time, resulting in an excessively large focusing stroke of the focusing group, resulting in slow focusing and insufficient improvement in focusing precision, and provides an improved Method of Focusing Accuracy of Zoom Optical System

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving focusing precision of zoom optical system
  • Method for improving focusing precision of zoom optical system
  • Method for improving focusing precision of zoom optical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the accompanying drawings. Apparently, the described embodiments do not limit the present invention.

[0034] The invention provides a method for improving the focusing precision of the zoom optical system. Aiming at technical problems such as too large focusing amount, slow focusing speed and low focusing precision of the traditional zoom optical system, starting from the origin of the optical system, a zoom optical system is proposed. The system adopts a passive semi-athermal design, that is, the short focus is a passive athermal design, and the focusing cam curve adopts a linear design method, which greatly reduces the focusing amount of the focusing group and is conducive to the rapid focusing of the zoom system; It also greatly improves the focusing accuracy of the zoom optical system and overcomes the short...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to an optimal design method of a zoom optical system. In order to solve the technical problems that the focusing stroke of a focusing group is too large, the focusing is slow andthe focusing precision is insufficient due to the fact that the focusing amount is not considered at the same time in the existing method for improving the focusing precision, the invention providesa method for improving the focusing precision of a zoom optical system, which comprises the following steps of: S1, optimizing the imaging quality of the zoom optical system; s2, carrying out passivesemi-athermalization design of the zoom optical system; s3, designing a focusing cam curve of the zoom optical system; and S4, adjusting and confirming the focusing precision. Starting from the sourceof an optical system, a passive semi-athermalization design method adopted by a zoom optical system is provided, namely, short focus is in passive athermalization design, and a linear design method is adopted by a focusing cam curve. The focusing amount of the focusing group is greatly reduced, and quick focusing of a zoom system is facilitated; and the focusing precision of the system is greatlyimproved, and the defects of a traditional focusing curve are overcome.

Description

technical field [0001] The invention belongs to a zoom optical system optimization design method, in particular to a method for improving the focusing precision of a zoom optical system. Background technique [0002] The application of zoom lenses has a history of decades and is widely used in all aspects of life. The optical path structure of the zoom lens is generally composed of a front fixed group, a zoom group, a compensation group and a rear fixed group. Usually, the fixed group is selected as the focusing group. By moving the focusing group back and forth along the optical axis, the zoom system is compensated for the defocus caused by the influence of the external environment temperature and the distance change of the target, so as to ensure the imaging clarity of the entire system. Focusing accuracy is an important indicator of the zoom system. The focusing accuracy generally takes 1 / 2 to 1 / 4 of the focal depth of the optical system, which directly affects the imagi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B15/00
CPCG02B15/00G02B27/0012
Inventor 闫阿奇董森梅超曹剑中
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap