公开(公告)号：US20240035883A1

公开(公告)日：2024-02-01

申请号：US17815699

申请日：2022-07-28

Applicant: GRAMM INC.

Inventor： Jisoo LEE

IPC: G01J1/42 ,  G01J1/04 ,  G01J1/58 ,  H05B47/20

CPC classification number: G01J1/4257 ,  G01J1/0407 ,  G01J1/58 ,  H05B47/20 ,  G01J2001/0481

Abstract: Disclosed is a device for inspecting optical power measurement of a light emitter, the device including: a reference light emitter; a measurer configured to measure optical power by receiving light emitted from one of the reference light emitter and a plurality of inspection target light emitters, the measurer including an integrating sphere, a photodiode detector, and a photocurrent or photovoltage measurement device; and a controller configured to calculate a first average of optical power of the plurality of inspection target light emitters by measuring first optical power of a first inspection target light emitter among the plurality of inspection target light emitters, and generate an alarm to stop using the measurer when a difference between the first average and a second optical power of the reference light emitter exceeds a first threshold. Thus, the inspection is more accurately and reliably carried out.

公开(公告)号：US20220353414A1

公开(公告)日：2022-11-03

申请号：US17245646

申请日：2021-04-30

Applicant: Gramm Inc.

Inventor： Jisoo LEE

IPC: H04N5/232

Abstract: Disclosed is an image correction method, implemented in an image correction apparatus that corrects an image taken by a camera, the method including: obtaining a first image by taking an image of a chart including a plurality of circles, each of which includes one or more regions of interest (ROIs) in a tangential direction and a sagittal direction, through the camera; selecting and storing tangential and sagittal image blur correction data of the camera, based on image blur data in the tangential and sagittal directions of the camera measured using the obtained first image; and loading the stored tangential and sagittal image blur correction data and applying the loaded tangential and sagittal image blur correction data to correction for a second image taken by the camera. Thus, image distortion due to, in particular, tangential and sagittal image blurs is effectively corrected by taking individual characteristics of the camera into account.