A method for determining compensation value and flatness of optical module

Abstract

The invention discloses a method for determining compensation value. The method includes the steps of: providing an optical module to be tested and setting a calibration plate; setting the optical module to be tested located in the placement area directly against the central calibration point, so that the optical module to be tested emits light, and the light hits the The central calibration point obtains the distance value between the central calibration point and the optical module to be tested, and uses the distance value between the central calibration point and the optical module to be tested as a reference value; shooting to a plurality of edge marking points to obtain a plurality of actual distance values ​​between the plurality of edge marking points and the optical module to be tested; using the central marking point as the coordinate origin, and according to the reference value, a plurality of the edge Surface fitting is performed on the calibration points and the plurality of actual distance values ​​to obtain a fitting equation; the fitting equation is configured to determine compensation values ​​for the plurality of edge calibration points. The invention adopts a fitting method to determine the compensation value, which improves the precision of the flatness in the optical module.

Description

technical field [0001] The invention relates to the field of optics, in particular to a method for determining the compensation value and the flatness of an optical module. Background technique [0002] The flatness of the optical module is an inherent characteristic of the optical module, and the flatness algorithm stored in the optical module is usually used to verify the flatness of the optical module. [0003] The determination of the compensation value in the flatness algorithm in the prior art is usually determined by the offset compensation method; different distance values ​​are obtained according to the distance from the optical module to different calibration points, and then the distance difference is obtained; the distance difference is the compensation value, However, this method can only obtain the compensation value of some specific calibration points. Therefore, in the process of verifying the flatness of the optical module, the image obtained by the optical ...

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Problems solved by technology

[0003] The determination of the compensation value in the flatness algorithm in the prior art is usually determined by the offset compensation method; different distance values ​​are obtained according to the distance from the optical module to different calibration points, and then the distance difference is obtained; the distance difference is the compensation value, However, this method can only obtain the compensation value of some specific calibration points. Therefore, in the process of verifying the flatness of the optical module, the image obtained by the optical module is not accurate, and the flatness of the optical module is not accurate.

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