Projection apparatus with coherent light source
First Claim
1. A projection apparatus comprising:
- a light source for emitting an illumination light with an expansion angle to a mirror device having a plurality of micromirrors for modulating and reflecting the illumination light to an image projection optical system for displaying an image, wherein each of the micromirrors is controlled to oscillate between a minimum deflection angle and a maximum deflection angle and an angular difference between the minimum deflection angle and the maximum deflection angle is greater than the expansion angle α
of the light flux of the illumination light according to a function relationship;
NA=n*sin α
,where NA is the numerical aperture of the flux of the illumination light, and n is the reflectance.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention discloses a projection apparatus comprising: a light source for emitting illumination light; a mirror device comprising a plurality of mirrors for generating an image by reflecting the illumination light toward a projecting direction by means of a deflecting operation; and a projection optical system which is placed in the optical axis of reflection light in the projecting direction of the illumination light incident to the mirror device and which projects the reflection light, wherein the optical axis of the illumination light incident to the mirror device and the optical axis of the reflection light in the projecting direction forms an angle that is larger than the expansion angle α of the flux of the illumination light that satisfies NA=n*sin α, where NA is the numerical aperture of the flux of the illumination light, and n is the reflectance.
19 Citations
6 Claims
-
1. A projection apparatus comprising:
-
a light source for emitting an illumination light with an expansion angle to a mirror device having a plurality of micromirrors for modulating and reflecting the illumination light to an image projection optical system for displaying an image, wherein each of the micromirrors is controlled to oscillate between a minimum deflection angle and a maximum deflection angle and an angular difference between the minimum deflection angle and the maximum deflection angle is greater than the expansion angle α
of the light flux of the illumination light according to a function relationship;
NA=n*sin α
,where NA is the numerical aperture of the flux of the illumination light, and n is the reflectance. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A color projection apparatus comprising:
-
a light source projects an illumination light as a light flux having an expansion angle; a color separator for separating the light from the light source into a plurality of illumination lights with respective colors; a plurality of mirror devices each comprising a plurality of deflecting mirrors controllable for deflecting and reflecting the illumination light toward an image projection direction to project and display an image; a color synthesizer for synthesizing lights reflected by the mirrors toward the image projection direction as a synthesized light; and a projection optical system disposed approximately in the optical axis of the synthesized light, wherein an angle between a direction of the illumination light incident to the mirror device and the image projection direction is larger than the expansion angle α
of the light flux of the illumination light according to a function relationship;
NA=n*sin α
,where NA is the numerical aperture of the flux of the illumination light, and n is the reflectance.
-
Specification
-
- Resources
-
Current AssigneeIgnite USA (Ignite)
-
Original AssigneeOlympus Corporation, Silicon Quest Kabushiki-Kaisha
-
InventorsEndo, Taro, Maeda, Yoshihiro, Ichikawa, Hirotoshi, Horikawa, Yoshiaki, Ishii, Fusao
-
Primary Examiner(s)Mack, Ricky
-
Assistant Examiner(s)Thomas, Brandi
-
Application NumberUS12/231,911Publication NumberTime in Patent Office1,432 DaysField of Search359290-292, 359/295, 359/298, 359/237, 359/242US Class Current359/292CPC Class CodesG02B 26/0841 the reflecting element bein...
