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Patent Searching and Data


Title:
OPTICAL ELEMENT, ILLUMINATION DEVICE, AND PROJECTION-TYPE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/210260
Kind Code:
A1
Abstract:
An illumination device is configured from a light source 10, an optical member 20, and an integrator 30. The optical member 20 is capable of rotating about a rotary axis AR. The planar shape of the optical member 20 is a ring shape centered on the rotary axis AR. Concavo-convex parts 21' are formed on a first surface 20A of the optical member 20. A plurality of concavo-convex structure units 21 are successively formed on the optical member 20. Adjacent concavo-convex structure units 21 have a mirror image symmetry relationship, and the concavo-convex parts of adjacent concavo-convex structure units 21 are smoothly linked. Convex and concave parts in the concavo-convex part 21' of each of the concavo-convex structure units 21 are smoothly linked. The size of the region occupied by the concavo-convex part 21' in each of the concavo-convex structure units 21 is greater than the size of light incident from the light source.

Inventors:
YASUI TOSHIFUMI (JP)
KONO YUSUKE (JP)
Application Number:
PCT/JP2021/005841
Publication Date:
October 21, 2021
Filing Date:
February 17, 2021
Export Citation:
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Assignee:
SONY GROUP CORP (JP)
International Classes:
G03B21/00; F21S2/00; F21V3/00; F21V9/14; F21V9/35; F21V9/38; F21V9/40; F21V9/45; G02B5/00; G02B5/30; G02B27/48; G03B21/14; F21Y115/30
Domestic Patent References:
WO2006090681A12006-08-31
Foreign References:
CN105301793A2016-02-03
CN104965307A2015-10-07
JP2008046523A2008-02-28
JP2018132547A2018-08-23
JPS5713401A1982-01-23
JP2007025466A2007-02-01
US20150362725A12015-12-17
US20190107781A12019-04-11
Attorney, Agent or Firm:
IWATA Masanobu et al. (JP)
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