Title:
MICROLENS ARRAY, DIFFUSION PLATE, AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/145268
Kind Code:
A1
Abstract:
The present invention provides a technique by which it is possible to more reliably obtain a more uniform irradiance distribution. In this microlens array, a plurality of lens elements are arrayed on at least one surface of a planar member, wherein the shape of the lens surface of each of the lens elements is defined by a non-spherical expression, a pitch D of the lens elements in the microlens array is 25μm to 150μm, and the microlens array has a bat-winged intensity distribution in which the intensity distribution of light passing through the microlens array is such that the light intensity is at a maximum at both ends in a prescribed view angle range and at a minimum at the center of the view angle range.
Inventors:
YASUHARA MAKOTO (JP)
KISHIMOTO MAKI (JP)
KISHIMOTO MAKI (JP)
Application Number:
PCT/JP2021/046990
Publication Date:
July 07, 2022
Filing Date:
December 20, 2021
Export Citation:
Assignee:
DAICEL CORP (JP)
International Classes:
G02B3/00; F21V5/04; G01S7/481; G02B5/02; G02B19/00
Foreign References:
| JP2020067664A | 2020-04-30 | |||
| US20170122728A1 | 2017-05-04 | |||
| JP2014126751A | 2014-07-07 | |||
| US20190368690A1 | 2019-12-05 | |||
| JPS5167681A | 1976-06-11 | |||
| CN105020674A | 2015-11-04 | |||
| US20140376220A1 | 2014-12-25 | |||
| US20150036339A1 | 2015-02-05 | |||
| JP2012108513A | 2012-06-07 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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