Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
レーザ照明装置及び画像表示装置
Document Type and Number:
Japanese Patent JP4880746
Kind Code:
B2
Abstract:
An object of the invention is to provide a laser illuminating device and an image display device that enable to remove speckle noises in a diffraction field and an image field, uniformly illuminate an illumination plane, and realize miniaturization. A laser illuminating device 100 includes a laser light source 3, a first lens 1 including a plurality of microlenses 10 each having a predetermined numerical aperture in an in-plane direction, each of the microlenses 10 being adapted to expand laser light emitted from the laser light source 3 to thereby superimpose the laser light transmitted through each of the microlenses 10; and a second lens 2 having an effective diameter larger than an effective diameter of the first lens 1, and for compensating for a divergence angle of the laser light expanded by each of the plurality of the microlenses 10.

Inventors:
Tetsuro Mizushima
Kenichi Kasumi
Tatsuo Ito
Shinichi Shikii
Application Number:
JP2009505075A
Publication Date:
February 22, 2012
Filing Date:
March 14, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Panasonic Corporation
International Classes:
G03B21/14; F21S2/00; F21V5/04; F21V14/06; G02B27/09; F21Y101/02
Domestic Patent References:
JP2007316393A2007-12-06
JPH1164789A1999-03-05
JPH10161295A1998-06-19
JPH10293268A1998-11-04
JPH08286382A1996-11-01
JPS60166951A1985-08-30
JPS6411326A1989-01-13
JP2001051237A2001-02-23
JP2007003744A2007-01-11
JPH01153506A1989-06-15
Foreign References:
WO2005073798A12005-08-11
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Shinsuke Otsuki