A method and system for object motion detection based on an optical structure space-time differentiator
A technology of object movement and optical structure, which is applied in the direction of transmitting sensing components, instruments, measuring devices, etc. by using optical devices, can solve the problems of lack of detection research, failure to work normally, difficulty in device integration, etc., and achieve simple structural design and easy The effect of large-scale production integration and small size
Active Publication Date: 2022-03-25
ZHEJIANG UNIV
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Problems solved by technology
The device does not use the time dimension, and there is a lack of research on the detection of moving objects; and the response of the device to the incident angle of the input light field is required to be greater than zero, so it cannot work normally in the case of normal incidence, which brings difficulties to device integration.
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[0021] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0022] like figure 1 Shown is an embodiment of a system based on a space-time differentiator of an optical structure for object motion detection, including an optical pulse information loading system, a space-time differential system, and an optical pulse information receiving system connected in sequence.
[0023] The optical pulse information loading system includes a pulse laser, a spatial light modulator, and a coherent imaging system. The pulsed laser outputs pulsed laser light, which is polarized into linearly polarized light through the polarizer 1, and its output end is connected to the spatial light modul...
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The invention discloses a method and system for detecting object movement based on a space-time differentiator of an optical structure. The invention has the advantages of simple structure design, easy preparation and integration, etc., and thereby realizes the detection of the temporal and spatial changes of objects. In the present invention, the coherent light pulse is used as the carrier to load the space-time pulse to the designed optical structure. The space-time transfer function of the optical structure has a zero point, and within a certain bandwidth, the first-order or high-order differential operation can be performed on the incident space-time pulse, and the object can be detected at the same time. The profile in space and the change in time, that is, the intensity of the output light pulse corresponds to the rate of change of the input pulse in time and space, so that the motion of the object can be detected. The object motion detection method provided by the invention has the characteristics of ultra-fast and large throughput, and has important technical application prospects in the fields of machine vision, image recognition and the like.
Description
technical field [0001] The invention relates to the field of optical information processing, in particular to a method and system for object motion detection based on a space-time differentiator of an optical structure. Background technique [0002] With the rapid development of information technology, the demand for information processing performance is constantly increasing. Compared with the information processing methods of traditional electronic devices, optical information processing technology has gradually developed into an important information processing method due to its advantages such as ultra-fast, large bandwidth, large throughput, and low loss. Recently, the optical differentiator has become one of the popular research directions in optical information processing. Its advantage lies in the ultra-fast extraction of images and the boundaries of transparent phase objects. It has important applications in neural networks, medical imaging and other fields. [000...
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IPC IPC(8): G01D5/353G01D5/34G01D5/36
CPCG01D5/35325G01D5/344G01D5/35335G01D5/36
Inventor 阮智超黄隽奕张佳豪朱腾峰
Owner ZHEJIANG UNIV