Direct optical image projectors
AssigneeLucent Technologies Inc.
InventorsRandy Clinton Giles, Omar Daniel Lopez, Roland Ryf
Life of this patent
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Abstract
An apparatus includes a reconfigurable spatial light modulator, a light source, and a transmission filter. The reconfigurable spatial light modulator is capable of producing spatially varying amplitude and/or phase modulations of an incident light wavefront. The light source is configured to direct an illumination light beam towards the reconfigurable spatial light modulator such that the modulator produces a modulated outgoing light beam there from. The transmission filter is configured to spatially filter a light pattern formed by the outgoing light beam and to selectively transmit light from substantially only one diffractive order of the light pattern.
Claims18
An apparatus, comprising:
- a reconfigurable spatial light modulator capable of producing spatially varying amplitude and/or phase modulations of an incident light wavefront;
- a light source being configured to direct an illumination light beam towards the reconfigurable spatial light modulator such that the modulator produces a modulated outgoing light beam;
- and
- a transmission filter being configured to spatially filter a light pattern formed by the outgoing light beam and to selectively transmit light from substantially only one diffractive order of the light pattern.
A method, comprising:
- modulating a wavefront of an incident coherent light beam to produce an outgoing light beam having spatial variations on wavefronts thereof;
- focusing a light beam such that the outgoing light beam can form a diffractive light pattern that is approximately a Fourier transform of the modulated wavefront;
- spatially filtering the diffractive light pattern to transmit light of substantially only one diffractive order therein;
- projecting the transmitted light onto a viewing screen to produce an image.
Dependencies are inferred from the claim text.