A new type of transmissive lens center deflection measuring device and measuring method

Abstract

The invention belongs to the optical measurement technology field and particularly relates to a novel transmission type eyeglass center-deflection measurement device and a measurement method. The device sequentially comprises an internal focusing zooming assembly, a to-be-measured eyeglass and a high-precision goniometer, wherein the inner focusing zooming assembly comprises a light source 10, a target 20, a parallel light pipe collimating mirror 30, a collimating mirror 40 and a fixed lens 50 which are sequentially and axially arranged, and the high-precision goniometer comprises a collimating mirror 70, a CCD 80 and an LCD 90 with an electronic length scale which are sequentially and axially arranged. According to the device, the high-precision goniometer is utilized to carry out eyeglass center-deflection measurement, the device has high resolution and invariant resolution; the internal focusing zooming technology is utilized, the measurement scope of the device is wide, long focal length, middle focal length and short focal length eyeglass measurement can be all realized; the OSD technology is utilized, the electronic length scale is utilized, the device can realize no parallax and is not sensitive to ambient detection brightness.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to a novel transmissive lens center deviation measuring device and a measuring method. Background technique [0002] In the optical cold processing process, the center deviation of the lens is an important index. The center deviation of the lens directly affects the imaging quality of the optical system. It is a necessary inspection process in the optical cold processing process. [0003] Since the transmissive lens center deviation measuring device has the advantages of convenience and high efficiency compared with the reflective lens center deviation measuring device; therefore, at present, optical production units use a large number of transmissive lens center deviation measuring devices and rarely use reflective lens center deviation measuring devices. device. [0004] At present, the transmissive lens center deflection measuring device on the market us...

AI Technical Summary

Problems solved by technology

This measurement device increases the detection range, but the resolution of the device is not fixed. On the other hand, due to the constraints of the optical parameters of the lens to be tested and the microscope, there are still some lenses that cannot be detected.

[0006] Both of the above two center deviation detection devices use optical glass reticles, so it is necessary to perform parallax correction on the measuring microscope before detection, otherwise the measurement accuracy will be affected; on the other hand, the reticles of these devices are generally dark reticles, if The detection environment is too dark, it is difficult to read, especially in a dark room

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