Laser projector
First Claim
Patent Images
1. A laser projector, comprising:
- a laser source section configured to emit laser beams;
a spatial light modulator which modulates the laser beams to generate image light;
a projector lens from which the image light is emitted;
a beam shaper configured to shape the laser beam into a shape of the spatial light modulator, the beam shaper being in a conjugated relationship with an exit pupil of the projector lens; and
a pupil uniformizer which makes a light intensity distribution uniform at the exit pupil of the projector lens, whereinthe pupil uniformizer is situated between the laser source section and the beam shaper and makes an intensity distribution of incident light to the beam shaper uniform.
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Accused Products
Abstract
There is provided a laser projector, including: a laser source section for emitting laser beams; a spatial light modulator which modulates the laser beams to generate image light; a projector lens from which the image light is emitted; a beam shaper which shapes the laser beams into a shape of the spatial light modulator; and a pupil uniformizer which makes a light intensity distribution uniform at an exit pupil of the projector lens, wherein the pupil uniformizer is situated between the laser source section and the beam shaper.
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Citations
12 Claims
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1. A laser projector, comprising:
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a laser source section configured to emit laser beams; a spatial light modulator which modulates the laser beams to generate image light; a projector lens from which the image light is emitted; a beam shaper configured to shape the laser beam into a shape of the spatial light modulator, the beam shaper being in a conjugated relationship with an exit pupil of the projector lens; and a pupil uniformizer which makes a light intensity distribution uniform at the exit pupil of the projector lens, wherein the pupil uniformizer is situated between the laser source section and the beam shaper and makes an intensity distribution of incident light to the beam shaper uniform. - View Dependent Claims (2, 3)
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4. A laser projector, comprising:
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a laser source section configured to emit laser beams; a spatial light modulator which modulates the laser beams to generate image light; a projector lens from which the image light is emitted; a beam shaper configured to shape the laser beam into a shape of the spatial light modulator; and a pupil uniformizer which makes a light intensity distribution uniform at an exit pupil of the projector lens, wherein the pupil uniformizer is situated between the laser source section and the beam shaper, wherein the pupil uniformizer includes a cluster of first element lenses which make the light intensity distribution uniform, wherein the beam shaper includes a cluster of second element lenses which shape the laser beams into the shape of the spatial light modulator, wherein the first element lenses spread the laser beams in response to a divergent angle of the first element lenses to make the light intensity distribution uniform, and wherein the second element lenses spread the laser beams in response to a divergent angle of the second element lenses to shape the laser beam. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A laser projector, comprising:
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a laser source section configured to emit laser beams; a spatial light modulator which modulates the laser beams to generate image light; a projector lens from which the image light is emitted; a beam shaper configured to shape the laser beam into a shape of the spatial light modulator; and a pupil uniformizer which makes a light intensity distribution uniform at an exit pupil of the projector lens, wherein the pupil uniformizer is situated between the laser source section and the beam shaper, wherein the laser source section includes a red laser source, which emits a red laser beam, a green light source, which emits a green laser beam, and a blue laser source, which emits a blue laser beam, and wherein a sectional area of the red laser beam incident to the beam shaper is smaller than sectional areas of the green and blue laser beams incident to the beam shaper.
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12. A laser projector, comprising:
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a laser source section configured to emit laser beams; a spatial light modulator which modulates the laser beams to generate image light; a projector lens from which the image light is emitted; a beam shaper configured to shape the laser beam into a shape of the spatial light modulator; and a pupil uniformizer which makes a light intensity distribution uniform at an exit pupil of the projector lens, wherein the pupil uniformizer is situated between the laser source section and the beam shaper, and wherein a relationship of F#<
f/D<
2×
F# is satisfied where F# is an f-number of the projector lens, D is a longitudinal beam diameter of the laser beams incident to the beam shaper, and f is a focal distance of a lens group through which the laser beams incident to the beam shaper pass up to the spatial light modulator.
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Specification