Detection device and detection method of optical ghost image

Abstract

The invention discloses a detection device of an optical ghost image near an optical axis, and the detection device is used in an optical system. The detection device comprises a laser, wherein a collimating lens, a half-passing and half-reflecting lens and a total reflective lens are arranged in turn in the laser beam output direction of the laser; an aperture with a small hole and a CCD charge coupled device)-array detector provided with an adjustable attenuator are arranged in turn in the reflected light directions of the half-passing and half-reflecting lens and the total reflective lens; the CCD-array detector is placed on a linear guide rail with location scales; the CCD-array detector is driven by a driver to move on the guide rail; the input end of the driver is connected with the output end of a computer; and the output end of the CCD-array detector is connected with the input end of the computer. The detection device provided by the invention can verify the ghost image in the optical system, thus increasing the safety of the high-power laser system. The device is suitable for the detection of the optical ghost image on the axis of the large-diameter lens; the device has the advantages of being simple in structure, convenient to move and easy to realize and overcoming the defect that the broad beam ghost image is difficult to detect.

Description

technical field [0001] The invention relates to the optical ghost image of an optical system, and the optical ghost image refers to a small light spot formed by the convergence of residual reflection on the surface of an optical element. In particular, it is a detection device and detection method for an optical ghost image located on the near optical axis of an optical system. Background technique [0002] Ghost images in high-power laser devices refer to small spots formed by the residual reflection and convergence of the inner surface of optical components. In high-power laser devices, ghost image spots may have high local peak power and are easily generated in the optical path. Therefore, ghost images in high-power laser devices have always been an important problem that cannot be ignored in optical engineering design. [0003] In high-power laser devices, the distribution of ghost images is closely related to the selection and arrangement of optical components of the s...

AI Technical Summary

Problems solved by technology

[0004] However, there are factors such as processing and installation errors in practice, which can easily cause the ghost image in the system to deviate from the theoretically set area, resulting in unexpected damage

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