Star sensor optical system based on APS (Automatic Protection Switching) detector

An optical system and star sensor technology, applied in optics, optical components, instruments, etc., can solve the problems of unfavorable system attitude measurement accuracy, improvement, and small number of stars, and achieve optimal design, smooth image plane, and diffuse spot distribution uniform effect

Active Publication Date: 2013-03-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

The large diameter of the entrance pupil has a small field of view, and the number of stars that can be observed at one time is small, which is not conducive to the improvement of the accuracy of the attitude measurement of the final system.

Method used

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  • Star sensor optical system based on APS (Automatic Protection Switching) detector
  • Star sensor optical system based on APS (Automatic Protection Switching) detector
  • Star sensor optical system based on APS (Automatic Protection Switching) detector

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Embodiment Construction

[0051] Such as figure 1 , figure 2 As shown, the star sensor optical system based on the APS detector includes a first positive lens 1, a second positive lens 2, a first negative lens 3, a diaphragm 4, and a second negative lens whose axes are arranged in a straight line. 5. The third positive lens 6, the third negative lens 7, the fourth positive lens 8 and the fourth negative lens 9;

[0052] The optical properties of the first positive lens 1 are:

[0053] 4.5f′1 '1 1 1 ', R 2 1 ';

[0054] The optical characteristics of the second positive lens 2 are:

[0055] 1f′2 '2 3 2 ', 3.5f 2 '4 2 ';

[0056] The optical characteristics of the first negative lens 3 are:

[0057] -2f′3 '3 3 '5 3 ', -2.5f 3 '6 3 ;

[0058] The optical characteristic of the second negative lens 5 is:

[0059] -2f′4 '4 4 '7 4 ', R 8 4 ';

[0060] The optical characteristics of the third positive lens 6 are:

[0061] 0.5f'5 '5 5 '9 5 ', -2.5f 5 '10 5 ';

[0062] The optical characteristics...

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Abstract

The invention relates to a star sensor optical system based on an APS (Automatic Protection Switching) detector. The star sensor optical system comprises a first positive lens, a second positive lens, a first negative lens, a diaphragm, a second negative lens, a third positive lens, a third negative lens, a fourth positive lens and a fourth negative lens, which are arranged in turn with axes in a same line. The star sensor optical system is used for solving the technical problems of an existing optical system that an entrance pupil diameter of a view field is smaller and an observing magnitude is limited. The star sensor optical system is beneficial to correcting a curvature of the field and has the advantages of larger field of view, wider scope of observing starry sky, higher once detecting probability, bigger entrance pupil diameter and higher observing magnitude.

Description

technical field [0001] The invention belongs to the field of optical design, and relates to a star sensor optical system using stars as a reference system for navigation and positioning, in particular to a star sensor optical system based on an APS detector. Background technique [0002] Today, attitude measurement of controlled objects is the most important part of research tasks in the fields of spaceflight, aviation and navigation. Obtaining the precise attitude information of the control object becomes the key to the success of the mission. Among the many attitude measurement instruments, the inertial gyroscope has high instantaneous attitude measurement accuracy, but it drifts greatly under long-term working conditions, while the earth sensor and sun sensor use the earth and the sun as the reference system, the measurement accuracy can only be Reach the order of magnitude or minutes. [0003] Therefore, the optical star sensor appeared. The star sensor shoots the star...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B1/00G01C21/02
Inventor 王虎薛要克刘杰钟红军卢欣李春江
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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