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

Large-aperture off-axis optical system and passive athermal method

An optical system and large-aperture technology, applied in the direction of optics, optical components, installation, etc., can solve the problems of increasing the volume, weight and cost of the system, and achieve the effect of simple installation

Active Publication Date: 2014-11-26
11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a large-diameter off-axis optical system and a passive athermalization method to solve the shortcomings of the existing optical passive and mechanical active athermalization methods, and increase the cost of the original system. Questions of size, weight and cost

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
  • Large-aperture off-axis optical system and passive athermal method
  • Large-aperture off-axis optical system and passive athermal method
  • Large-aperture off-axis optical system and passive athermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, a large-aperture off-axis optical system includes: a displacement compensation mechanism 1, a secondary mirror chamber 2 with a parabolic secondary mirror 3 installed, a connecting frame 4, a primary mirror frame 5, and a primary mirror with an ellipsoidal primary mirror 6 installed Mirror chamber 7; the bottom of the displacement compensation mechanism 1 and the secondary mirror chamber 2 (the direction is the same as that shown in the accompanying drawing, the upper part of the secondary mirror chamber 2 is equipped with a secondary mirror 3, and the bottom of the secondary mirror chamber 2 faces away from the secondary mirror The upper part of chamber 2) is fixedly connected, the primary mirror frame 5 is fixedly connected with the primary mirror chamber 7, and the primary mirror frame 5 and the secondary mirror chamber 2 are connected by the connecting frame 4; the parabolic secondary mirror 3 and the ellipsoidal primary mirror 6 a...

example

[0045] Table 2

[0046]

[0047] The data in Table 2 is calculated based on the above interval compensation formula. The displacement compensation mechanism 1 prepared by using a 64mm aluminum block can fully compensate the system interval caused by temperature. It effectively guarantees that the image quality of the system does not change with temperature.

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

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a large-aperture off-axis optical system and a passive athermal method. The large-aperture off-axis optical system comprises a displacement compensation mechanism, a secondary mirror chamber with a secondary mirror, a connection framework, a primary mirror framework and a primary mirror chamber with a primary mirror. The displacement compensation mechanism is fixedly connected with the bottom of the secondary mirror chamber, the primary mirror framework is fixedly connected with the primary mirror chamber, and the primary mirror framework is connected with the secondary mirror chamber through the connection framework. According to the large-aperture off-axis optical system, the displacement compensation mechanism is arranged and can completely compensate a system interval caused by temperature, it is effectively guaranteed that image quality of the system does not change with temperature, the system is easy to install, and the size, the weight and cost are not increased on the basis of an original system.

Description

technical field [0001] The invention relates to the field of reflective optical systems, in particular to a large-diameter off-axis optical system and a passive adiabatic method. Background technique [0002] At present, optical systems working in complex environments have to withstand very large environmental temperature changes, typically up to -20°C to +60°C. In an environment with rapid temperature changes, the optical system will change the focal length, image plane position, and image plane quality due to thermal instability of optical materials and structural materials. The transmission optical system uses passive and active methods to eliminate thermal effects, and the technology development is relatively complete, and it is widely used in equipment. With the development of technology and the need for long-distance effects, the athermalization and athermalization technologies of large-aperture off-axis reflective optical systems have gradually been paid attention to...

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
IPC IPC(8): G02B7/182G02B7/185
Inventor 刘琳李松山张海武王岳张文海
Owner 11TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com