Title:
照明装置および画像投射装置
Document Type and Number:
Japanese Patent JP6776286
Kind Code:
B2
Abstract:
An illumination apparatus includes a first condenser lens configured to collect illumination light including light from the wavelength conversion element, a first lens array including a plurality of lens cells and configured to divide the illumination light from the first condenser lens into a plurality of light fluxes, a second lens array including a plurality of corresponding lens cells configured to receive the light flux from each of the plurality of lens cells in the first lens array. The first condenser lens has a spherical aberration that collects the illumination light at a position on a light source side of the first lens array, and/or a surface apex of a first lens cell disposed on an optical axis side in the first lens array is more eccentric from a contour center of the first lens cell.
Inventors:
Kento Kawasumi
Application Number:
JP2018023666A
Publication Date:
October 28, 2020
Filing Date:
February 14, 2018
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B21/14; F21S2/00; F21V5/04; F21V9/08; F21V9/32; F21V11/10; F21V13/00; G03B21/00; H04N5/74; H04N9/31
Domestic Patent References:
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Foreign References:
| CN204759006U | ||||
| WO2016197888A1 | ||||
| US20170068089 | ||||
| CN106324958A | ||||
| US20160327235 |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya