Wide-angle lens and atomic filter-based optical signal detection system

Abstract

The invention discloses a wide-angle lens and atomic filter-based optical signal detection system, which belongs to the field of photoelectric signal detection. The system comprises a wide-angle lens, an atomic filter and an photoelectric sensor which are arranged in turn in the propagation direction of light, wherein the wide-angle lens is a wide-view field lens or a fish-eye lens with the view field angle reaching over 60 degrees; the atomic filter is a Faraday-type atomic filter or a Voigt-type atomic filter; and the photoelectric sensor is a high-forming quality image sensor or a commonly used photoelectric detection sensor such as a complementary metal-oxide-semiconductor transistor (CMOS), charged-coupled device (CCD) or the like. In the system, the view field angle of the wide-angle lens is large, so that the wide-view field detection is easy to realize, system capture time is reduced, and software and hardware cost are reduced. The atomic filter has the characteristic of extremely narrow filter bandwidth and can effectively inhibit the influence of background noises so as to ensure that the detection accuracy cannot be reduced because of the increment of the view field angle. The system has low complexity and a clear structure, is convenient to operate, reduces detection time, and improves detection precision.

Description

technical field [0001] The invention relates to an optical signal detection system based on a wide-angle lens and an atomic filter, belonging to the field of photoelectric signal detection. Background technique [0002] In optical signal detection, the detection performance largely depends on the detection time and detection accuracy. The wide field of view can obtain a large detection range, thereby saving scanning time and reducing the consumption of detection time; but at the same time, noise in the wide field of view is also introduced, resulting in a decrease in the overall detection signal-to-noise ratio, and the detection Accuracy is reduced. Therefore, how to obtain a wide detection field of view while removing complex background noise is very important in optical signal detection. However, under normal circumstances, the detection time and detection accuracy are contradictory to each other: increasing the detection time can increase the detection accuracy; and red...

AI Technical Summary

Problems solved by technology

However, the field of view of the interference filter is small, and it only has a better filtering effect on light near the optical axis, while the filtering performance on light off the optical axis decreases, which is manifested by an increase in filter bandwidth and a decrease in transmittance.

Therefore, for a wide-field-of-view wide-angle lens capture system, since the angle between the received light of the wide-angle lens and the optical axis of the filter can reach a large angle, the filtering performance of the interference filter is limited, which affects the capture performance of the wide-field of view

[0007] How to better deal with the detection time and detection accuracy has not been a better way

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