APPARATUS FOR IMPLEMENTING GRATING FOCAL LENGTH DETECTION AND GRATING FOCAL LENGTH DETECTION INSTRUMENT

WIPO Patent Application WO/2021/063320

A1

An apparatus (600) for implementing grating focal length detection, comprising: a parallel light source (1201) configured to emit light into a grating (910) to be focused by the grating (910); a grating bearing member (1300) configured to bear the grating (910); a reference surface (920) configured to form an illumination area on the basis of the light focused by the grating (910); and a measurement apparatus (710) configured to identify the illumination area size of the illumination area formed on the reference surface (920). The apparatus (600) for implementing grating focal length detection can effectively detect the focal length of the grating.

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DIAO HONGHAO (CN)
HUANG LINGXI (SG)

PCT/CN2020/118470

April 08, 2021

September 28, 2020

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BEIJING IVISUAL 3D TECH CO LTD (CN)
VISIOTECH VENTURES PTE LTD (SG)

G01M11/02

WO2016181206A1

2016-11-17

CN205091114U	2016-03-16
CN107091729A	2017-08-25
CN208672281U	2019-03-29
CN107817093A	2018-03-20
CN105807349A	2016-07-27
US20040021851A1	2004-02-05

BEIJING IVISUAL 3D TECHNOLOGY CO., LTD. (CN)

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