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Digital type sun sensor visual field multiplex optical ostiole device

A solar sensor, digital technology, applied in the field of solar sensors, can solve the problems of complex back-end processing algorithms and poor versatility, and achieve the effects of expanding the field of view measurement range, improving the effective distance, and improving the detection accuracy.

Active Publication Date: 2008-01-30
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

For the arrayed small hole structure, since the solar sensor needs to calculate the center of the image spot for many arrayed small holes (up to hundreds of small holes), the back-end processing algorithm is complicated. Generally, in order to reduce the volume of the sensor, Image processing is carried out in the on-board computer, while the sun sensor is only responsible for outputting images, which is less versatile

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  • Digital type sun sensor visual field multiplex optical ostiole device
  • Digital type sun sensor visual field multiplex optical ostiole device

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Embodiment Construction

[0013] The following describes the present invention in detail with reference to the accompanying drawings and embodiments. The specific technical indicators of the embodiments are as follows:

[0014] The uniaxial field of view is ±64°×±64°, the accuracy requirement is better than 0.01° within -31°~+31°, the resolution is better than 0.005°; at -31°~-64°(+31 °~+64°) The accuracy requirement is better than 0.05°, the resolution is better than 0.01°, and the resolution of CMOS APS detector is 1024×1024. The pixel size is 15um×15um.

[0015] As shown in Figure 1, the digital sun sensor is composed of a CMOS APS detector 3, an optical head and a signal processing part (not shown in the figure). The optical head is composed of a narrow band filter 1 and an optical aperture device 2. The optical aperture device is located above the CMOS APS detector 3, and the central aperture 204 is directly facing the center of the CMOS APS detector array.

[0016] Among them, the narrow-band filter ...

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Abstract

The invention discloses an optical hole device of a digital sun sensor which uses a whole piece of quartz glass, a truncated cone is uplifted in the center of the device after optical processing. The center and the periphery of the truncated cone are provided with small holes formed by vacuum masking, therefore, the central hole of the truncated cone has greater height to a CMOS APS light-sensitive element than the peripheral holes, thus guaranteeing the high precision of the view field of the central hole and at the same time expanding the field measurement range of the peripheral holes. The holes are formed by a mask layer on the surface of a glass substrate and can further enhance the effective distance between an incident plane and a surface of a detector with the use of the refraction effect, thus improving the detection accuracy of the system in a disguised form. At the same time, eight pairs of peripheral holes are arranged, and the distance and the connected line slope of each pair are different. According to the feature and by the processing of the imaging spot in the detector, which view field the sun is positioned in can be determined and no other external system is needed.

Description

Technical field [0001] The invention belongs to the sun sensor in the attitude control system of satellites or other space vehicles, and specifically refers to the field of view multiplexing optical aperture device in the optical system of the sun sensor. Background technique [0002] With the continuous advancement of semiconductor technology, all aspects of CMOS image sensor performance are gradually reaching and surpassing CCD. At present, CMOS APS (active pixel sensor) is developing in the direction of high resolution, high dynamic range, high sensitivity, low noise, ultra-miniaturization, and digitization. As the size of the sun sensor continues to decrease, CMOS APS will be more and more widely used in this field by virtue of its advantages in volume, weight, power consumption, cost, radiation resistance and reliability. [0003] Nowadays, the optical pinhole device in the optical head of the high-precision digital solar sensor based on CMOS APS can be divided into two kind...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08B64G1/00B64G1/36
Inventor 朱鸿泰孙胜利仇善昌饶鹏席红霞陈凡胜
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI