High precision lens center deviation detection instrument and measurement method thereof

Abstract

The invention discloses a high precision lens center deviation detection instrument and a measurement method thereof. The high precision lens center deviation detection device comprises an LED irradiation source emission system, a microscope system and a detected glass bearing which are arranged on a pedestal; the LED irradiation source emission system and the detected glass bearing are in a same plane; the microscope system is arranged above the detected glass bearing; light rays emitted by a light source in a signal emission system is turned by a reflection prism and goes to detected glass after going through a cross wire and being focused by a light condensation lens, and then the light rays are imagined on a cross reticle after amplification by a microscope system and then are imagined on a CCD through an electronic ocular lens and displayed on a monitor. The high precision lens center deviation detection device and a measurement method thereof can realize measurement on center deviations of lenses with an extremely big focal length or an extremely small focal length and avoids a fact that reading is affected because the cross wire is too thick while the sensitivity is not changed. According to displacement of the cross wire after the lens is rotated for one round, the measurement on the center deviation is realized.

Description

technical field [0001] The invention relates to the technical field of optical inspection and measurement, in particular to a high-precision lens center deviation detection instrument and a measurement method thereof. Background technique [0002] There is often a key problem in the production process of optical technology: center deviation will occur in the process of lens processing and production and lens assembly, that is, the optical center (optical axis) of the lens does not coincide with the geometric center (geometric axis), but There are deviations. In other words, the optical axis of the beam and the reference axis of the lens are inconsistent, and when they are in different directions and positions, the center deviation will appear. [0003] In order to reduce the center deviation during the production and assembly of the lens and ensure the coaxiality of each optical surface of the optical lens, it is necessary to design and manufacture a high-precision optical ...

AI Technical Summary

Problems solved by technology

[0004] The existing technology closest to the present invention is the center deviation detection device and detection method, the application number is CN20131041023.7, when the invention detects a lens with a particularly small focal length or a particularly large lens, the imaging of the crosshair is too thick, which affects the reading and increases the error , affecting the precision

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