To provide a lighting optical system that is easily manufactured and emit an illuminating light suitable for image display by improving speckle noise or spatial light intensity distribution, and to provide a projection image display apparatus.
The system includes a collimate lens 4 as an array direction collimate optical element which emits incoming light from a laser array light source 2 as parallel light within an array face; an array vertical collimate optical element 5 which emits the incoming light from the laser array light source as parallel light within an array vertical face; and an integrator optical element 6 which divides the incoming light into a plurality of luminous fluxes in a matrix form within a plane vertical to an optical axis C, and emits the divided luminous fluxes so as to be overlapped with each other on an illuminated surface of a light bulb 7. The array direction collimate optical element 4 is disposed with a predetermined space Lx from the laser array light source 2 so that diffusive light emitted from a plurality of light emitting points 3 is incident thereon in an overlapped manner.
SASAGAWA TOMOHIRO
| JP2003218017A | 2003-07-31 | |||
| JP2002184206A | 2002-06-28 | |||
| JP2003090959A | 2003-03-28 | |||
| JP2003149594A | 2003-05-21 | |||
| JP2003270585A | 2003-09-25 | |||
| JP2004326008A | 2004-11-18 | |||
| JP2001174919A | 2001-06-29 | |||
| JP2004191735A | 2004-07-08 | |||
| JP2005129889A | 2005-05-19 |
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka