Lighting apparatus including a light source, a first mirror, and a second mirror disposed between the light source and the first mirror
A lighting apparatus of the present invention includes light source ( 101 ), rod integrator ( 105 ), reflecting mirror ( 103 ), diffusion plate ( 104 ) disposed adjacently to reflection mirror ( 103 ), reflective polarizing plate ( 107 ), and wavelength plate ( 106 ). The lighting apparatus further includes curved mirror ( 102 ) disposed among light source ( 101 ), reflecting mirror ( 103 ), and diffusion plate ( 104 ). Reflecting mirror ( 103 ) and curved mirror ( 102 ) include apertures ( 102 a and 103 a ) formed to allow at least light from light source ( 101 ) to pass. Curved mirror ( 102 ) reflects light leaked from the entrance plane side of rod integrator ( 105 ) toward aperture ( 103 a ) of reflecting mirror ( 103 ).
1. A lighting apparatus comprising:
a laser source emitting light;
a light guide that guides the light to an illumination object;
a first mirror that is disposed on an entrance plane side of the light guide to reflect the light advancing toward the entrance plane side in the light guide to an exit plane side of the light guide;
a diffusion plate disposed adjacently to the first mirror;
a reflective polarizing plate disposed on the exit plane side of the light guide;
a wavelength plate disposed between the light guide and the reflective polarizing plate; and
a second mirror disposed between the laser source and the first mirror,
wherein the first mirror includes an aperture formed to allow at least the light from the laser source to pass,
wherein the second mirror includes an aperture in a center of the second mirror so as to allow at least the light linearly advancing from the laser source to pass,
wherein the diffuser diffuses the light linearly advancing from the laser source to become diffused light having a spread angle, and
wherein the second mirror reflects the light reflected by the reflective polarizing plate and leaked from the aperture of the first mirror toward the aperture of the first mirror.
2. The lighting apparatus according to claim 1 , wherein the second mirror comprises a curved mirror having a convex surface directed to the laser source.
3. The lighting apparatus according to claim 2 , wherein the second mirror is disposed in a position in which a curvature radius of the second mirror and a distance from a virtual vertex of the second mirror to the first mirror are equal to each other.
4. The lighting apparatus according to claim 1 , wherein the light guide comprises a rod integrator.
5. The lighting apparatus according to claim 1 , wherein the first mirror is disposed between the diffusion plate and the light guide.
6. The lighting apparatus according to claim 1 , wherein the diffusion plate is disposed between the first mirror and the light guide.
7. A projector comprising:
the lighting apparatus according to claim 1 ; and
a projection optical system that projects light from the lighting apparatus.
8. The lighting apparatus according to claim 2 , wherein the light guide comprises a rod integrator.
9. The lighting apparatus according to claim 3 , wherein the light guide comprises a rod integrator.
10. The lighting apparatus according to claim 2 , wherein the first mirror is disposed between the diffusion plate and the light guide.
11. The lighting apparatus according to claim 3 , wherein the first mirror is disposed between the diffusion plate and the light guide.
12. The lighting apparatus according to claim 4 , wherein the first mirror is disposed between the diffusion plate and the light guide.
13. The lighting apparatus according to claim 2 , wherein the diffusion plate is disposed between the first mirror and the light guide.