The Method of Using Movable Reticle to Realize Datum Transformation

Abstract

The invention discloses a laser autocollimator for realizing datum transformation by using a movable reticle and a method. The laser autocollimator for realizing the datum transformation by using the movable reticle comprises a collimator objective, a beam splitting module, a reticle, an image detection module and a laser adjustment module, wherein the collimator objective is arranged at the front end of the beam splitting module; the reticle is arranged between the rear end of the collimator objective and the front end of the beam splitting module; the reticle can move forward and backward along the axial direction of the collimator objective. The method comprises the steps of datum establishment, datum transformation, datum point disappearing and collimating process; in the datum transformation step, software samples the mass center positions of fine alignment graphic sinks for at least two times, calculates an average value of the mass center positions and displays a datum point; meanwhile, a reticule replacing the datum point is generated, and a center point of the reticule is arranged at the position of the average value of the mass center; in the collimating process, a datum image is enabled to disappear by a movable reticle technology, so that the interference between two images is avoided, and the problem about the distinguishing of the two images is solved.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a method for realizing benchmark conversion by using a movable reticle. Background technique [0002] Such as figure 2 As shown, the existing laser autocollimator, including collimating objective lens, light splitting module, reticle, image detection module, laser, etc., is fixedly set on the basis of quantitative optical path travel in the setting of reticle, and its work The principle is: the laser light emitted by the energy continuous laser passes through the beam splitting module and reaches the center of the reticle. This point is the focus position of the collimating objective lens, so the emitted parallel light can be reflected back to the center of the reticle by the external mirror. [0003] The light emitted by the light source is reflected by the beam splitter in the beam splitting module and illuminates the reticle located on the focal plane of the objective lens. ...

AI Technical Summary

Problems solved by technology

[0005] 1. Defects of the aiming method: no matter whether the alignment is observed with the CCD or the eyepiece, when the figure reflected by the external mirror coincides with the reference part, it is impossible to distinguish whether it is completely aligned, and at the same time, the two figures will interfere with each other ;like image 3 , Figure 4 Shown: When using a cross hair or dot as a reference point, when the reference itself and the reflected image do not coincide, it can be clearly carried out; Figure 5 , Image 6 Shown: Once the parts coincide, it is difficult to judge the distance between the reference and the center of the reflected figure, and it is inconvenient to distinguish between the two figures

[0006] 2. Defects in aiming reliability: If the reticle used as a reference is generated by software, the reticle generated by the software will be adjusted to the optical axis at the factory, but due to the influence of transportation, temperature changes, impacts and other factors , the crosshair used as the benchmark may deviate from the optical axis, resulting in a decrease in measurement accuracy

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