Rapid centering optical element center thickness precision measuring instrument

Abstract

The invention discloses a rapid centering optical element center thickness precision measuring instrument. The measuring instrument comprises an angle plate bottom plate with one end provided with a V-shaped open slot with a vertex angle of 60 degrees, and a lens to be measured is placed in the V-shaped open slot; a guide rail is arranged on the upper surface of the angle plate bottom plate, a gauge outfit support slides in a reciprocating mode along a gauge outfit support guide rail, a micrometer gauge outfit is arranged on the gauge outfit support, and when the gauge outfit support slides in a reciprocating mode, the micrometer gauge outfit moves in the direction of the vertex angle bisector of the V-shaped open slot; a measuring scale is further arranged at the bottom of the angle plate bottom plate and is arranged in the direction of the vertex angle bisector of the V-shaped open slot; the gauge outfit support and the measuring scale move in the same direction, and the speed ratio is 2: 1; at the beginning, the measuring scale and the gauge outfit support are both located at the vertex position of the V-shaped open slot, when the measuring scale moves to make contact with the lens to be measured, the moving distance of the measuring scale is the radius r of the lens to be measured, at the moment, the moving distance of the micrometer gauge outfit on the gauge outfit support is 2r, and the measuring scale is located above the center of the lens to be measured. The measuring instrument can be suitable for high-efficiency and high-precision measurement of the center thickness of various circular optical elements with different radiuses.

Description

technical field [0001] The invention belongs to the technical field of optical precision measurement, and relates to a fast centering precision measuring instrument for the center thickness of an optical element. Background technique [0002] As a basic parameter of the lens, the central thickness is a key parameter affecting the imaging quality of the high-precision optical imaging lens, and must be effectively measured during the processing. [0003] Optical lenses are made of glass or polymer materials, and the surface is easily damaged. In the traditional contact center thickness measurement, frequent contact will affect the surface finish of the lens. In order to solve the above problems, experts and scholars in the field of optical engineering have proposed several non-destructive Measurement method, the published literature mainly includes: "Design of Lens Center Thickness Measuring Instrument" in "Journal of Xi'an University" in 2003, which introduced a technical sol...

AI Technical Summary

Problems solved by technology

[0003] Optical lenses are made of glass or polymer materials, and the surface is easily damaged. In the traditional contact center thickness measurement, frequent contact will affect the surface finish of the lens. In order to solve the above problems, experts and scholars in the field of optical engineering have proposed several non-destructive Measurement method, the published literature mainly includes: "Design of Lens Center Thickness Measuring Instrument" in "Journal of Xi'an University" in 2003, which introduced a technical solution for measuring the thickness of the lens center by interferometry, although the accuracy of the interferometry itself is It is relatively high, but it is easily affected by environmental factors such as external airflow and vibration. In addition, the structure of this method is relatively complicated and the cost is high. In 2011, "Design of Lens Thickness Measurement System Based on Confocal Method" in "Journal of Instrumentation" , this document uses white light as the confocal light source, and uses the spectral information reflected back from the upper and lower surfaces of the measured lens to calculate the thickness of the lens

Images