Small-distortion high-image quality catadioptric optical system
An optical system and image quality technology, applied in the field of optical systems, can solve problems such as poor energy convergence and stray light, and achieve the effects of simple structure, insensitive tolerance, and small distortion
Pending Publication Date: 2019-04-02
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
View PDF0 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In view of the problem of stray light caused by the supporting structure of the secondary mirror of the existing catadioptric optical system, resulting in poor energy convergence, the present invention provides a small distortion and high image quality catadioptric optical system, which has small distortion and good image quality. Moreover, the tolerance of the optical system is not sensitive, and the processing and assembly are relatively simple
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0039] like figure 1 As shown, a small-distortion high-quality catadioptric optical system includes a lens barrel, a secondary mirror 2 coaxially arranged in the lens barrel from left to right, a transmission correction group 3 and a main reflector 1; the secondary mirror 2 The outer diameter is compatible with the inner mirror of the lens barrel; a diaphragm is set on the main mirror 1, the left side of the secondary mirror 2 is the object plane, and the right side of the main mirror 1 is the image plane; the main mirror 1 is opened in the middle A spherical reflector with a hole, the secondary mirror 2 is a spherical mirror curved to the object surface; the middle part of the surface of the secondary mirror 2 close to the primary reflector 1 is coated with a reflective film to form a reflective area; the secondary mirror 2 is coated with oth...
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
Login to View More Abstract
The invention belongs to the field of optical systems and provides a small-distortion high-image quality catadioptric optical system. For the problem of poor energy convergence due to the stray lightcaused by the support structure of the secondary mirror of the existing catadioptric optical system, the system comprises a mirror barrel, and a secondary mirror, a transmission correction group and aprimary reflecting mirror disposed in the mirror barrel, wherein the outer diameter of the secondary mirror is matched with the inner mirror of the mirror barrel; an aperture is arranged on the primary reflecting mirror, the left side of the secondary mirror is an object surface, and the right side of the primary reflecting mirror is an image surface; the primary reflecting mirror is a sphericalreflecting mirror with a light through hole in the middle, and the secondary mirror is a spherical mirror that is curved toward the object surface; the secondary mirror is coated with a reflective film near the middle surface of the primary reflecting mirror to form a reflective region; the regions other than that coated with the reflective film are transmissive regions; the light beam from the object surface is transmitted through the transmissive region of the secondary mirror and enters the primary reflecting mirror; the light beam reaches the reflective region of the secondary mirror afterbeing reflected by the primary reflecting mirror, and is reflected into the transmission correction group through the reflection region, and the light beam corrected by the transmission correction group is imaged on the image surface through the light through hole.
Description
technical field [0001] The invention belongs to the field of optical systems, in particular to a catadioptric optical system with small distortion and high image quality, which can be used as a star sensor for all-day observation of stars. Background technique [0002] Star sensors are widely used in astronomical navigation, positioning and orientation. Star sensors can be divided into three categories: transmissive, total reflection and catadioptric. [0003] The focal length of the optical system of the transmissive star sensor is short (generally no more than 300mm), the distortion is large (the relative distortion is about 2‰), and the aperture is small (generally no more than Φ80mm), which leads to its ability to detect the position of stars and weak magnitudes. Insufficient detection capabilities; [0004] Most of the total reflection star sensors are Cassegrain system and R-C system. The primary mirror of the classic Cassegrain system is a paraboloid, and the seconda...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/08
CPCG02B17/0856
Inventor 解来运李巧玲吴崔罡王晓伟
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI