Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Infrared large-view-field front-fixed-group-free zoom optical system capable of eliminating cold images

A front fixed group and optical system technology, applied in the field of optics, can solve the problems of degradation of correction effect, difficult to eliminate, serious cold reflection effect of large field of view, etc., and achieve good image quality and stable image plane position

Active Publication Date: 2021-01-15
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When designing this configuration, the contribution of the narcissus intensity of the shared objective lens to different fields of view is different. It is difficult to take into account the narcissus intensity of each field of view in the design to reach the tolerance of the system, which usually results in large field of view narcissus. The effect is serious and difficult to eliminate, seriously affecting the imaging quality and observation effect of the large field of view
For the infrared large field of view zoom optical system, this imaging defect is unacceptable
[0004] At present, the method of electric correction is usually adopted at home and abroad to improve or weaken the intensity of narcissus, and to compensate or weaken its adverse influence on the image, but this method can only be aimed at a specific zoom position, and cannot take into account the entire zoom range. , the scene changes, the correction effect will degrade, which will seriously affect the image quality

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
  • Infrared large-view-field front-fixed-group-free zoom optical system capable of eliminating cold images
  • Infrared large-view-field front-fixed-group-free zoom optical system capable of eliminating cold images
  • Infrared large-view-field front-fixed-group-free zoom optical system capable of eliminating cold images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0036] The technical solution of the present invention is: an infrared large field of view without front fixed group zoom optical system configuration for eliminating cold images, which sequentially includes a variable power lens group 1, a compensation lens group 2, a fixed lens group 3, and two The secondary imaging lens group 4 and the detector 5 are composed.

[0037] see Figure 1~4 According to the direction of the optical path, the configuration of an infrared large-field-of-view zoom optical system without a front fixed group for eliminating cold images includes: a zoom lens group 1, a compensation lens group 2, a fixed lens group 3, and a secondary imaging lens group 4 , Detector 5.

[0038] When the optical interval between the variable power lens group 1 and the compensation lens group 2 is d11, and the optical distance between the compensation lens ...

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 relates to an infrared large-view-field front-fixed-group-free zoom optical system capable of eliminating cold images. The core of the configuration of the optical system is to cancel afront fixed lens group in a zoom optical path of a common mechanical compensation method, thereby eliminating the influence of the front fixed lens group on cold images at each zoom position. The optical system is composed of a zoom lens group, a compensation lens group, a fixed lens group, a secondary imaging lens group and a detector. According to the infrared large-view-field front-fixed-group-free zoom optical system configuration design for eliminating cold images, the configuration of the optical system is determined on the basis of a front-fixed-group-free mechanical compensation zoom principle and near-axis optical system theoretical calculation and analysis, aberration of the optical system is corrected through optical structure parameter optimization, aberration balance and aspheric surface, and the image quality is optimal.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to an infrared large field of view zoom optical system without a front fixed group for eliminating cold images. Background technique [0002] Depending on the distance of the target to be observed, the photoelectric observation and monitoring system usually requires the optical system to have multiple focal lengths, which are used for detection, identification and large-scale monitoring of targets at different distances. The zoom thermal imager can change the focal length of the optical system. Therefore, target images of different sizes can be obtained on the image plane, which is very beneficial for photoelectric observation and monitoring. [0003] Since high-performance thermal imaging cameras usually use cooled detectors, the cold reflection effect should be considered in system design, otherwise it will have a serious impact on the imaging effect. Most of the implementation me...

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): G02B15/163
CPCG02B15/163
Inventor 刘红霞
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products