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Visual field multiplexing optical ostiole device of digital type sun sensor

A solar sensor and 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 effect of expanding the measurement range of the field of view, increasing the effective distance, and improving the detection accuracy

Active Publication Date: 2009-06-10
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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  • Visual field multiplexing optical ostiole device of digital type sun sensor
  • Visual field multiplexing optical ostiole device of digital type sun sensor

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Embodiment Construction

[0013] The present invention is described in detail below in conjunction with accompanying drawing and embodiment, and the specific technical index of embodiment is as follows:

[0014] The single-axis field of view is ±64°×±64°, and the accuracy requirement is better than 0.01° within -31°~+31°, and the resolution is better than 0.005°; °~+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] See figure 1 , the digital solar sensor consists 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 pinhole device 2 . The optical pinhole device is located above the CMOS APS detector 3 , and the central pinhole 204 faces the center of the CMOS APS detector array.

[0016] Among them, the narrow-band filter is a conventional product with a th...

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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 a sun sensor in an attitude control system of a satellite or other space vehicles, and specifically refers to a field of view multiplexing optical small hole device in an optical system of the sun sensor. Background technique [0002] With the continuous advancement of semiconductor technology, the performance of CMOS image sensors in all aspects is 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. With the development trend of solar sensor size reduction, 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 sun sensor based on CMOS APS can be divided...

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Application Information

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Patent Type & Authority Patents(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