公开(公告)号：US11209371B2

公开(公告)日：2021-12-28

申请号：US16687709

申请日：2019-11-19

Applicant: CHROMA ATE INC.

Inventor： Yu-Hsin Liu ,  Kai-Chao Chan ,  Ming-Kai Hsueh

IPC: G01N21/93 ,  G01N21/88

Abstract: An optical detecting device includes an image capturing device and a processor. The processor is coupled to a light source and an image capturing device. The processor is configured to adjust a light intensity of the light source for irradiating a correction object in order that a gray value of at least one image block, captured by the image capturing device, of the correction object matches a target correction value, and record a target light intensity while the target light intensity matches the target correction value; control the light source to irradiate light on a testing object with the target light intensity, and control the image capturing device to capture a testing object image of the testing object; and calculate ratios of a target gray value to the gray value of a plurality of pixels of the testing object image to obtain a mapping table.