Spot scanning imaging method for trigger exposure of encoder

Abstract

The invention relates to a spot scanning imaging method for trigger exposure of an encoder. The spot scanning imaging method comprises the following steps that a two-dimensional scanning rotary table performs point-by-point scanning on a target object in the horizontal direction under the driving of a position servo motor; when the two-dimensional scanning rotary table reaches the limit position, a rotary table pitch shaft rotates for degrees of a square wave period of the pitch encoder under the driving of a pitch servo motor and remains unchanged; and the two-dimensional scanning rotary table performs point-by-point scanning on the target object in the reversed horizontal direction, and omnibearing scanning can be achieved. According to the spot scanning imaging method for the trigger exposure of the encoder, the two-dimensional scanning rotary table serves as a scanning system to achieve the omnibearing scanning and can be controlled easily. An optical system is simple in structure, image quality is ensured through shaft imaging, and focusing in the direction of the optical axis can be achieved by means of the position of a rectangular diaphragm. A receiving unit is a quick-response single-point photoelectric receiver, is high in signal storage and data processing efficiency, and can be suitable for different-wavelength monochromatic spectrum imaging.

Description

technical field [0001] The invention relates to an encoder precision control and scanning imaging technology, in particular to a point-to-point encoder-triggered point scanning imaging method. Background technique [0002] The existing relatively mature scanning imaging system is composed of a target, an optical system, a scanning device, a detector, etc. When the overall imaging is performed, the optical system will produce aberrations, which will affect the imaging quality received by the detector. In the system, the line scanning and surface scanning imaging methods are more widely used. Although the detector can effectively improve the scanning imaging efficiency through a linear array CCD or an area array CCD, the imaging quality problem cannot be eliminated in principle, and the scanning imaging field of view is small. Contents of the invention [0003] The present invention aims to solve the technical problems in the prior art, and provides a point-to-point encoder...

AI Technical Summary

Problems solved by technology

Although the detector can effectively improve the scanning imaging efficiency through a linear array CCD or an area array CCD, the imaging quality problem cannot be eliminated in principle, and the scanning imaging field of view is small

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