Title:
照明光学系およびそれを用いた投射型表示装置
Document Type and Number:
Japanese Patent JP5110979
Kind Code:
B2
Abstract:
An illumination optical system (OE) configured to guide a light flux from a light source unit (1) onto an illuminated surface includes a compression system configured to compress the light flux at a different compression ratio in a first cross section and a second cross section which are orthogonal to each other, and a polarized light splitting unit (7) including a polarization split surface. The second cross section includes a line normal to the polarization split surface. Where a compression ratio for compressing a light flux in the first cross section is ±, a compression ratio in the second cross section is ², and an F number smaller of F numbers calculated according to a maximum angle of a light flux incident on an illuminated surface in the first and the second cross sections is Fno, the following conditions are satisfied: - 0.18 �¢ Fno 2 + 1.245 * ( Fno ) - 1.260 <± / ² < 1 1.4 ‰¤ Fno ‰¤ 3.6.
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Inventors:
Ryota Kadowaki
Yu Yamauchi
Yu Yamauchi
Application Number:
JP2007167476A
Publication Date:
December 26, 2012
Filing Date:
June 26, 2007
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B21/14; G02B19/00; G02B27/28; H04N5/74
Domestic Patent References:
| JP2007003744A | ||||
| JP2001215448A | ||||
| JP11295658A | ||||
| JP2000162542A | ||||
| JP2006113242A |
Attorney, Agent or Firm:
Yukio Takanashi