Display device using optical modulator equipped with lens system having improved numerical aperture
First Claim
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1. A display device using an optical modulator equipped with a lens system having an improved numerical aperture, comprising:
- an illumination lens system for radiating light emitted from a light source;
a diffractive optical modulator for generating diffracted light having a plurality of diffraction orders by modulating light incident from the illumination lens;
a numerical aperture reducer for reducing a numeral aperture by causing positive order diffracted light and corresponding −
1st order diffracted light of the diffracted light, which is generated by the diffractive optical modulator, to approach each other; and
a projection system for condensing the diffracted light onto an object and performing scanning when the diffracted light having the reduced numerical aperture is emitted from the numerical aperture reducer.
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Abstract
Disclosed herein is a display device using an optical modulator equipped with a lens system having an improved numerical aperture. The display device includes numerical aperture reducer for reducing a numeral aperture by causing +1st order diffracted light and corresponding −1st order diffracted light of a diffracted light, which have passed through a relay lens system, to approach each other.
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Citations
16 Claims
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1. A display device using an optical modulator equipped with a lens system having an improved numerical aperture, comprising:
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an illumination lens system for radiating light emitted from a light source;
a diffractive optical modulator for generating diffracted light having a plurality of diffraction orders by modulating light incident from the illumination lens;
a numerical aperture reducer for reducing a numeral aperture by causing positive order diffracted light and corresponding −
1st order diffracted light of the diffracted light, which is generated by the diffractive optical modulator, to approach each other; and
a projection system for condensing the diffracted light onto an object and performing scanning when the diffracted light having the reduced numerical aperture is emitted from the numerical aperture reducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification