Title:
LENS OPTICAL CHARACTERISTIC MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/230342
Kind Code:
A1
Abstract:
Provided is a lens optical characteristic measurement device capable of suppressing light unevenness and emitting uniform light onto a lens. This lens optical characteristic measurement device comprises a lens holding unit, an operation input unit, a measurement control unit, a measurement calculation unit, a light emission unit (17), a light reception unit (19), and an output unit. The light emission unit (17) comprises a light source unit. The light source unit includes a plurality of LED light emission elements having different wavelengths, a substrate (17a), and a diffusion plate (17b). The LED light emission elements are mounted on the substrate (17a). The diffusion plate (17b) is disposed in the light emission direction of the LED light emission elements. The light emission unit (17) emits light from an LED light emission element of a wavelength designated on the basis of measurement control information through the diffusion plate (17b) and onto the lens (Le). A target sheet (17c) may be placed above the diffusion plate (17b).
Inventors:
KOIDE TAMAKI (JP)
Application Number:
PCT/JP2019/028994
Publication Date:
November 19, 2020
Filing Date:
July 24, 2019
Export Citation:
Assignee:
REXXAM CO LTD (JP)
International Classes:
G01M11/02; G01M11/00; G02B3/00
Foreign References:
| JPH11211617A | 1999-08-06 | |||
| JPH10132707A | 1998-05-22 | |||
| JP2003106938A | 2003-04-09 | |||
| JP2006189386A | 2006-07-20 | |||
| US20140340672A1 | 2014-11-20 | |||
| JP2019027945A | 2019-02-21 | |||
| JP2008299140A | 2008-12-11 | |||
| JP2009192411A | 2009-08-27 | |||
| JPH09257644A | 1997-10-03 | |||
| JP2002022598A | 2002-01-23 |
Attorney, Agent or Firm:
TSUJIMARU Koichiro et al. (JP)
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