ILLUMINATION DEVICE USING COHERENT LIGHT SOURCE

WIPO Patent Application WO/2012/032670

A1

A laser beam (L50) generated by a laser light source (50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). An image (35) of a dispersion plate is recorded as a hologram on the hologram recording medium (45) by using reference light focused onto a scanning origin point (B). The light beam scanning device (60) bends the light beam (L50) at the scanning origin point (B) so as to irradiate the light beam (L50) onto the hologram recording medium (45). At such time, scanning is performed in such a way that the mode of bending the laser beam changes over time so that the location at which the bent laser beam (L60) is irradiated onto the hologram recording medium (45) changes over time. Irrespective of the location at which the beam is irradiated, a diffracted beam (L45) from the hologram recording medium (45) reproduces, at the same location, a reproduction image (35) of the same dispersion plate. An illuminated spot, which has a spectrum that is restricted by the reproduction image (35) of the hologram, is formed on a light-receiving face (R) of an object being illuminated (70).

JP2010230800	PROJECTOR, PROJECTOR ADJUSTMENT SYSTEM, PROJECTOR ADJUSTMENT METHOD, LIGHT SOURCE DEVICE, COLOR SEPARATION DEVICE, AND OPTICAL MODULATOR
JP4829904	Lighting structure with light guide layer
JP3094489	[Name of invention] Backlight heat dissipation device

KURASHIGE MAKIO (JP)

PCT/JP2010/065692

March 15, 2012

September 07, 2010

Click for automatic bibliography generation  

DAINIPPON PRINTING CO LTD (JP)
KURASHIGE MAKIO (JP)

F21S2/00; G03H1/22; G03H1/32; F21Y101/02

WO2008114502A1

2008-09-25

JP2009163901A	2009-07-23
JP2008262029A	2008-10-30

See also references of EP 2615363A4

SHIMURA HIROSHI (JP)
Hiroshi Shimura (JP)

View/Download PDF      PDF Help

Previous Patent: PROJECTION-TYPE FOOTAGE DISPLAY DEVICE

Next Patent: COSMETIC COMPOSITION FOR KERATIN FIBERS