Light-spot view-finding device and method
A light spot and aperture technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve the problems of resolution reduction, light and dark changes are not easy, low sensitivity, etc., to achieve the effect of improving the dynamic range
Inactive Publication Date: 2007-06-13
NO 5 INST ZHONGSHAN SCI ACADEMY
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The structure of the 040 case is simple, but if the incident surface is very smooth, the size of the spot will become very small, so it will not be easy to interpret the light and dark changes of the spot, so its resolution will be reduced. Much lower and less sensitive
[0007] The 623 case mainly uses the sensor to receive the reflected light close to the mirror. Therefore, the signal received by the sensor can be divided into a DC part and an AC part. When the size of the spot is too small, its change, that is, the AC part, is difficult to distinguish, so the interpretation is even more difficult
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[0055] Please refer to FIG. 1A , which is a system architecture diagram of the present invention. When light is incident on a surface 100, the characteristics of the reflected light depend on the roughness of the surface 100. The smoother the surface 100, the more mirror-like the surface 100 is, which can reflect the incident light 110 almost completely, making the reflected light The energy of the incident light 110 is almost the same. If the roughness of the surface 100 is larger, then the surface 100 is more like a foggy surface. After the incident light 110 is incident on the surface 100 of the foggy surface, the light is almost uniformly scattered in all directions on the surface 100, because the surface 100 has a large The unevenness of the surface causes the incident light to produce a scattering effect, making the light propagate in any direction. In addition, the smoother the surface 100 is, the less obvious the scattering effect is, so the generated light spots are ...
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The invention relates to a facula image picking-up device and method, emitting a highly coherent light from light source, when the highly coherent light irradiates surface, further generating scattered light, which passes through light limiting piece to form diffracted beams by aperture effect of the light limiting piece, where these diffracted beams interfere with one another to generate facula and limit scattered light to enter incident visual angle of a sensor by the blocking action of the light limiting piece so as to reduce deformation quantity of facula as moving, and finally the sensor picks up the facula into facula diagram, and continuous comparison of the facula diagram can identify moving direction and size of the facula. And it makes facula image clear and easy to identify, stable and sensitive.
Description
technical field [0001] The present invention relates to a device and method for taking images of light spots, in particular to a device and method for taking images by scattering light through a small-aperture light-limiting element to generate diffracted light, and the diffracted lights interfere with each other to form light spots . Background technique [0002] Laser is a light source with high coherence. Therefore, when two high coherence beams collide and their optical path difference is smaller than the coherent length, interference effects will occur, and the interference effects are divided into constructive Interference and destructive interference, constructive interference is bright, and destructive interference is dark, so the interference effect is often a pattern of light and dark arrangement. Moreover, the interference system is related to the wavelength. When two light beams meet, if the phase difference is half the wavelength, destructive interference will ...
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Inventor 黄宜裕陈铭王茂燃黄文政马心一
Owner NO 5 INST ZHONGSHAN SCI ACADEMY