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An optical system for a miniaturized high-precision star sensor

A technology of optical system and star sensor, applied in the field of optical system for star sensor and optical engineering, can solve the problems of large volume and weight, large volume and weight, unfavorable light weight of the star sensor, etc., and achieves low difficulty in parts processing , the effect of excellent absolute distortion and good adaptability to the space environment

Active Publication Date: 2019-06-18
BEIJING INST OF CONTROL ENG
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AI Technical Summary

Problems solved by technology

After the optical system is complicated, the general volume and weight are relatively large
After the volume and weight of the optical system become larger, the star sensor needs to be structurally reinforced to meet the requirements of the stability of the optical system, resulting in a larger volume and weight of the star sensor product, which is not conducive to the light weight of the star sensor

Method used

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  • An optical system for a miniaturized high-precision star sensor

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Embodiment Construction

[0026] The star sensor is generally composed of a light shield, an optical system, a detector component and its circuit, a data processing circuit, a secondary power supply, software (system software, application software and star watch), a main structure and a reference mirror.

[0027] The star sensor uses an optical system to converge the energy of the star target, and the converged star point energy is imaged on the star sensor detector for subsequent image processing and attitude data output. Therefore, the imaging quality, volume weight, and space environment adaptability of the optical system are the key indicators for evaluating the optical system of the star sensor.

[0028] Such as figure 1 As shown, the optical system of the present invention is composed of six lenses. The optical system includes a first lens 1, a second lens 2, an aperture stop 3, a third lens 4, a fourth lens 5, and a fifth lens 6 from left to right. , The sixth lens 7, the detector protection glass 8...

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Abstract

The invention provides an optical system for a miniaturization high-precision star sensor. According to the invention, a quasi-gauss lens structure is adopted and formed by 6 lenses; all the lenses are spherical lenses; and the glass of the first lens is made of fused quartz materials so that the first lens can be immediately used for correcting image difference and can be used as protection glass of the optical system. According to the optical system is characterized by wide spectrum, large view side and large relative aperture and has quite small distortion quantity in a quite wide spectrum range and view field; the concentration degree of confusion disc energy of each view field is uniformly distributed; the imaging quality is good; the system can work at a temperature from -50 DEG C to +70 DEG C and has good image quality and defocusing amount; and posture measurement of high-precision star sensor working in severe space and temperature can be met.

Description

Technical field [0001] The invention relates to an optical system for a star sensor, which belongs to the category of optical engineering. Background technique [0002] The star sensor uses the star as the measurement target. The star is imaged on the photoelectric converter through the optical system. The output signal is sent to the data processing unit through A / D conversion. After star point extraction and star map recognition, the optical axis vector of the star sensor is determined The pointing in the inertial coordinate system is determined by the installation matrix of the star sensor on the aircraft, the starlight navigation system and the ship to determine its three-axis attitude in the inertial coordinate system. [0003] The star sensor is generally composed of a light shield, an optical system, a detector component and its circuit, a data processing circuit, a secondary power supply, software (system software, application software and star watch), a main structure and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B27/00G01C25/00
CPCG01C25/00G02B13/005G02B27/0012
Inventor 梁士通梅志武郑然赵晓雨李松王婧晔武宏宇李玉明隋杰张运方孙慧丽曹哲
Owner BEIJING INST OF CONTROL ENG
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