LIGHTING DEVICE AND PROJECTOR

Abstract

A lighting device includes: a light source which supplies a beam; a shaping optical portion which shapes the beam into a linear luminous flux approximately parallel to a first direction; and a scanner which causes the linear luminous flux to scan in a second direction approximately perpendicular to the first direction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.

FIG. 1 shows an outline configuration of a lighting device 10 according to Embodiment 1 of the invention.

FIG. 2 shows a planar configuration of each portion from a light source to a collimator.

FIG. 3 illustrates a displacement of a linear luminous flux using a rotating prism.

FIG. 4 illustrates an illumination area in an illumination object.

FIG. 5 shows an outline configuration of a lighting device according to a modification example 1 of Embodiment 1.

FIG. 6 shows an outline configuration of a lighting device according to a modification example 2 of Embodiment 1.

FIG. 7 shows a configuration causing the linear luminous flux to focus in a position of a reflecting mirror or a proximity thereof.

FIG. 8 shows a configuration deflecting the linear luminous flux approximately 90 degrees with the reflecting mirror.

FIG. 9 shows an outline configuration of a projector according to Embodiment 2 of the invention.

FIG. 10 shows a configuration providing each light source integrated.

FIG. 11 shows a configuration causing each colored light to scan with one rotating prism.

FIG. 12 shows a configuration causing each colored light to scan with one reflecting mirror.

FIG. 13 illustrates an optical path of an R light.

FIG. 14 illustrates an optical path of a G light.

Claims

1. A lighting device comprising: a light source which supplies a beam;a shaping optical portion which shapes the beam into a linear luminous flux approximately parallel to a first direction; anda scanner which causes the linear luminous flux to scan in a second direction approximately perpendicular to the first direction.

2. The lighting device according to claim 1, wherein the shaping optical portion makes a light quantity distribution of the linear luminous flux approximately even.

3. The lighting device according to claim 1, wherein the shaping optical portion includes a diffractive optical element which shapes the beam into the linear luminous flux by diffraction.

4. The lighting device according to claim 1, comprising: a parallelizing optical portion which parallelizes the linear luminous flux from the shaping optical portion.

5. The lighting device according to claim 1, wherein the scanner includes a rotating prism which transmits the linear luminous flux while rotating around a rotation axis.

6. The lighting device according to claim 1, wherein the scanner includes a reflecting mirror which reflects the linear luminous flux while rotating around a rotation axis.

7. The lighting device according to claim 1, wherein the light source supplies a plurality of the beams which are isochromatic.

8. The lighting device according to claim 1, wherein the light source supplies laser beams, which are the aforementioned beams.

9. The lighting device according to claim 1, comprising: a plurality of the light sources which supply mutually differing colored lights, whereinthe scanner causes the colored lights from the plurality of light sources to scan.

10. A projector, comprising: a light source which supplies a beam;a shaping optical portion which shapes the beam into a linear luminous flux approximately parallel to a first direction;a scanner which causes the linear luminous flux to scan in a second direction approximately perpendicular to the first direction; anda spatial light modulator which modulates light from the scanner in accordance with an image signal.

11. The projector according to claim 10, wherein the shaping optical portion makes a light quantity distribution of the linear luminous flux approximately even.

12. The projector according to claim 10, wherein the shaping optical portion includes a diffractive optical element which shapes the beam into the linear luminous flux by diffraction.

13. The projector according to claim 10, comprising a parallelizing optical portion which parallelizes the linear luminous flux from the shaping optical portion.

14. The projector according to claim 10, wherein the scanner includes a rotating prism which transmits the linear luminous flux while rotating around a rotation axis.

15. The projector according to claim 10, wherein the scanner includes a reflecting mirror which reflects the linear luminous flux while rotating around a rotation axis.

16. The projector according to claim 10, wherein the light source supplies a plurality of the beams which are isochromatic.

17. The projector according to claim 10, wherein the light source supplies laser beams, which are the aforementioned beams.

18. The projector according to claim 10, comprising: a plurality of the light sources which supply mutually differing colored lights, whereinthe scanner causes the colored lights from the plurality of light sources to scan.