A scanning method for laser ablation processing based on spatio-temporal optimization

Abstract

The invention relates to a method for scanning laser ablation processing based on time-space optimization. The method comprises the following steps of 1, calculating the total quantity of corneas needing to be ablated by a computer, and dividing the total quantity into multiple parallel scanning areas in equal scanning points; 2, scanning the parallel scanning areas in an equal interval mode, carrying out sequential scanning along equal-interval areas from a first scanning area, and carrying out the sequential scanning in the same method again by returning to the first scanning area after scanning to the end; 3, selecting points along a headwind direction by adopting a laminated mode when selecting scanning points in any scanning area, enabling two laser pulses in a same scanning area to generate a certain interval, and carrying out headwind scanning. Due to the adoption of the method for scanning the laser ablation processing based on the time-space optimization, disclosed by the invention, the laser pulses in continuous times can act on the scanning points in a certain distance, the light spot overlapping degree is reduced to the minimum, a certain time interval can be carried out on the action of two scanning points in adjacent coordinates, and the heat dissipation can be full.

Description

technical field [0001] The invention relates to a laser processing method, in particular to a laser processing method for temperature-sensitive materials or isolated corneas. Background technique [0002] When the traditional excimer laser ablates the temperature-sensitive material or the isolated cornea, on a certain ablation layer, all the scanning points of the layer are ablated at random, although this can reduce the inhomogeneity of ablation to a certain extent , but this method may make two consecutive laser pulses adjacent to each other in the treatment area, the dust generated by the previous scanning point is likely to interfere with the next scanning point, reducing the laser energy reaching the surface of the object to be ablated , and the overlap between two adjacent points is not completely dissipated due to heat, resulting in overheating. Contents of the invention [0003] The purpose of the present invention is to improve the deficiencies in the prior art, ...

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Problems solved by technology

[0002] When the traditional excimer laser ablates the temperature-sensitive material or the isolated cornea, on a certain ablation layer, all the scanning points of the layer are ablated at random, although this can reduce the inhomogeneity of ablation to a certain extent , but this method may make two consecutive laser pulses adjacent to each other in the treatment area, the dust generated by the previous scanning point is likely to interfere with the next scanning point, reducing the laser energy reaching the surface of the object to be ablated , and the overlap between two adjacent points is not fully dissipated due to heat, resulting in overheating

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