Refractive-reflective optical system with heavy caliber, large view field and small focal ratio

An optical system and large field of view technology, applied in the field of optical systems, can solve the problems of small focal ratio of R-C system, difficult processing and detection, etc., and achieve good effect of chromatic aberration

Inactive Publication Date: 2011-11-23
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the R-C telescope system has more advantages than the classic Cassegrain system, the primary mirror of the R-C system must be a hyperboloid, and the processing and inspe

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
  • Refractive-reflective optical system with heavy caliber, large view field and small focal ratio
  • Refractive-reflective optical system with heavy caliber, large view field and small focal ratio
  • Refractive-reflective optical system with heavy caliber, large view field and small focal ratio

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] See figure 1 with figure 2 , The large-aperture, large-field and small-focal-ratio refractive optical system of the present invention has a large-diameter Cassegrain system at the front end, which is composed of a parabolic primary mirror 1 and a hyperboloid secondary mirror 2 with a diameter of more than 1 m. Place a plane mirror 3 to introduce the optical path perpendicular to the main optical axis by placing a plane mirror at a position on the main optical axis Z composed of the center of the main and secondary mirrors about 1m from the main optical axis Z between the primary and secondary mirrors. Z is on the horizontal optical axis Y. According to the direction of the light path, the zoom system is connected to the primary image plane position, that is, the Nashimi focus position. Through the secondary imaging zoom system, the focal length of the Cassegrain system is shortened by more than 4 times, forming a small focal ratio and large field of view system. The zo...

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 a telescope system with heavy caliber, large view field and small focal ratio. The telescope system comprises a heavy-caliber Cassegrain system at the front end, and the heavy-caliber Cassegrain system comprises a paraboloidal primary mirror (1) the caliber of which exceeds 1 meter and a hyperboloidal secondary mirror (2); by adopting an inclined plane mirror (3), the optical path is led to the horizontal optical axis Y vertical to a primary optical axis Z which comprises the primary mirror and the secondary mirror, and the plane mirror (3) is connected with a focal reducing system at the Smith-resistant focal position, wherein the focal reducing system comprises four groups of lenses, that is to say, a field lens group (I) comprising only one positive-focal-powerlens, a second lens group (II) comprising four lenses, a positive-focal-power third lens group (III) comprising two lenses, and a positive-focal-power fourth lens group (IV) comprising three lenses. Especially, a diaphragm (9) is arranged between the second lens group and the third lens group, and the diaphragm (9) and the primary mirror conjugate and can be used for dimming.

Description

technical field [0001] The invention relates to the field of optical systems, in particular to an optical system with a large diameter, a large field of view and a small focal ratio, which can be applied to ground-based astronomical telescopes. Background technique [0002] Astronomical telescopes with large aperture, large field of view and small focal ratio are of great significance in astronomical observation, because large aperture means stronger light-gathering ability, large field of view means larger single-frame observation range, and small focal ratio can detect more Weak magnitude. Traditional large-aperture astronomical telescopes must use reflective primary mirrors, and the characteristics of reflective optical systems limit the enlargement of the field of view. The classic Cassegrain system (Cassegrain), because the image plane must be pulled out behind the main mirror, so the focal length is longer, and the focal ratio is generally around f / 7~f / 15. The primar...

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): G02B17/08G02B23/00
Inventor 马文礼向贤毅
Owner INST OF OPTICS & ELECTRONICS - 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