Title:
OPTICAL SYSTEM DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/026987
Kind Code:
A1
Abstract:
In optical system devices in which a diffraction grating is replaced with a microlens, the contrast of a dot pattern is low. The purpose of the present invention is to provide an optical system device comprising an optical element 2 on which lenses 21 that transmit light of a wavelength λ are periodically arranged, and an irradiation unit 1 having a light source 10 that irradiates two or more of the lenses 21 with the light of the wavelength λ, wherein, when the focal length of the lens 21 is f, n is a natural number of 1 or more, the size of a k-th (k is a natural number of 1 or more) pitch from the smallest among the pitches of the lenses 21 is Pk, a distance L1 between the irradiation unit 1 and a focus position 9 of the optical element 2 satisfies expression 1 with respect to any one or more pitches Pk.
Inventors:
NAWATA AKIFUMI (JP)
NAKAMURA TOMONORI (JP)
TANAKA SATORU (JP)
NAKAMURA TOMONORI (JP)
TANAKA SATORU (JP)
Application Number:
PCT/JP2022/031411
Publication Date:
March 02, 2023
Filing Date:
August 19, 2022
Export Citation:
Assignee:
SCIVAX CORP (JP)
International Classes:
G02B3/00; F21V5/00; F21V5/04; F21V13/02; F21V14/00; G01S7/481; H01S5/022; F21Y115/30
Domestic Patent References:
| WO2017131585A1 | 2017-08-03 | |||
| WO2020222704A1 | 2020-11-05 | |||
| WO2021229848A1 | 2021-11-18 | |||
| WO2021230324A1 | 2021-11-18 | |||
| WO2017131585A1 | 2017-08-03 |
Foreign References:
| US11085609B1 | 2021-08-10 | |||
| JP2018511034A | 2018-04-19 | |||
| JP2006500621A | 2006-01-05 |
Other References:
H. HAMAMLAU ARRAY, ILLUMINATOR, APPLIED OPTICS, vol. 43, no. 14, 10 May 2004 (2004-05-10), pages 2888 - 2894
Attorney, Agent or Firm:
OKUDA Noritsugu (JP)
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