Instrument and method for measuring digital parallax

Abstract

This invention pertains to the field of an optical precision measuring technology, which relates to a digital parallax measuring instrument and a measuring method and comprises a light source, an objective lens, an image acquisition module, a computer and an electromechanical translation stage. The light source illuminates a reticule of an optical system to be measured through an eyepiece. A light ray enters the objective lens through after penetrating a telescope and forms an image on the image acquisition module through which an image is sent to the computer. Electromechanical translation is realized through the electromechanical translation stage controlled by the computer, and electromechanical translation data is sent back to the computer by the electromechanical translation stage. The objective lens is arranged on the electromechanical translation stage in a clamping manner. The invention also comprises an optical splitting system through which the light ray enters a coarse sighting camera and transmits a video signal collected to a monitor used for coarse collimation alignment before measuring. The instrument and the method of the invention use the computer to correct the measurement errors caused by the changes of the environment, have the advantages of high currency, rapidness and good objectivity and can be used for the detection of optical systems and the high-precision parallax measurement in assembly processes.

Description

technical field [0001] The invention belongs to the technical field of optical precision measurement, and relates to a digital parallax measuring instrument and a measuring method, which can be used for high-precision parallax measurement in the detection and assembly process of an optical system reticle. technical background [0002] Optical system structure such as figure 1 As shown, wherein the reticle 3 is difficult to ensure that it is accurately installed on the image focal plane 4 of the telescopic objective lens 2 (or equivalent objective lens), and there is a certain linear parallax 6 from the focal plane, then the parallel rays 1 of the infinitely distant object pass through The image formed by the telescopic objective lens 2 will not converge on the reticle 3, so the human eye cannot see the target and the reticle 3 clearly at the same time, which affects the observation of the target; due to the influence of the linear parallax 6, through the optical system When...

AI Technical Summary

Problems solved by technology

Although these parallax measurement technologies add CCD cameras and image acquisition modules, they still use the traditional visual measurement method and the split optical path, which requires a collimator to provide an infinite target. The adjustment of the optical path is complicated and introduces more system errors. , failed to achieve true high-precision parallax measurement

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