Title:
DIFFRACTION OPTICAL ELEMENT AND OPTICAL SYSTEM DEVICE SUCH AS DOT PROJECTOR USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/066981
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical element that can control not only a light irradiation direction but also illuminance, and an optical system device that uses the optical element. This diffraction optical element controls, by a relief structure, light entered through a prescribed position, and emits the light so as have phase φ1(x, y) at position (x, y), wherein the relief structure is formed so that the phase φ1(x, y) satisfies φ1(x, y) = φ2(x, y)+ φ3(x, y)-2 mπ (m is an arbitrarily defined integer), in which φ2(x, y) represents the phase of light emitted at position (x, y) of a diffraction lens capable of controlling the light entered from the prescribed position to be parallel light, and φ3(x, y) represents the phase at the position (x, y) of a projection diffraction optical element capable of controlling the parallel light to have a projection pattern for a prescribed purpose.
Inventors:
OGAWA DAIKI (JP)
NAWATA AKIFUMI (JP)
TANAKA SATORU (JP)
NAWATA AKIFUMI (JP)
TANAKA SATORU (JP)
Application Number:
PCT/JP2019/037196
Publication Date:
April 02, 2020
Filing Date:
September 24, 2019
Export Citation:
Assignee:
SCIVAX CORP (JP)
International Classes:
G02B5/18
Domestic Patent References:
| WO2015030127A1 | 2015-03-05 | |||
| WO2011030858A1 | 2011-03-17 |
Foreign References:
| JP2001166254A | 2001-06-22 | |||
| JP2014167550A | 2014-09-11 | |||
| JPS61213802A | 1986-09-22 | |||
| JPH0210310A | 1990-01-16 | |||
| JPS6319602A | 1988-01-27 | |||
| JP2005525579A | 2005-08-25 | |||
| JPH11231356A | 1999-08-27 |
Attorney, Agent or Firm:
OKUDA Noritsugu (JP)
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