Imaging device for moving a virtual image
First Claim
Patent Images
1. A display system comprising:
- a holographic projector arranged to project a two-dimensional real image of an object, the holographic projector comprising a spatial light modulator arranged to apply a phase-delay distribution to incident light, wherein the phase-delay distribution comprises phase data representative of a lens and phase data representative of the object, the real image being a holographic reconstruction resulting from the phase-delay distribution applied to the incident light; and
an imaging device, comprising;
a virtual image projection optic;
a first diffuser and a second diffuser positioned in series along an optical axis from the holographic projector to the virtual image projection optic, the first diffuser being positioned a first distance from the virtual image projection optic, the second diffuser being positioned a second distance from the virtual image projection optic, the first distance being different from the second distance; and
a controller arranged to control the first and second diffusers to make the real image visible on only one of the first and second diffusers, the holographic projector being configured to project the real image on either of the first and second diffusers,wherein the virtual image projection optic is positioned along an optical axis between the first and second diffusers and a viewing plane, the virtual image projection optic being arranged to form a virtual image of a real image formed on either of the first diffuser and the second diffuser, the virtual image having a substantially different virtual distance from the viewing plane as observed by a user when the real image is visible on the first diffuser as compared to when the real image is visible on the second diffuser.
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Abstract
An imaging device includes a projection optic arranged to form a virtual image of an object. The imaging device further includes a first diffuser positioned a first distance from the virtual projection optic and a second diffuser positioned a second distance from the virtual projection optic. The controller is arranged to control the first and second diffuser to make the real image visible on one of the diffusers.
19 Citations
24 Claims
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1. A display system comprising:
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a holographic projector arranged to project a two-dimensional real image of an object, the holographic projector comprising a spatial light modulator arranged to apply a phase-delay distribution to incident light, wherein the phase-delay distribution comprises phase data representative of a lens and phase data representative of the object, the real image being a holographic reconstruction resulting from the phase-delay distribution applied to the incident light; and an imaging device, comprising; a virtual image projection optic; a first diffuser and a second diffuser positioned in series along an optical axis from the holographic projector to the virtual image projection optic, the first diffuser being positioned a first distance from the virtual image projection optic, the second diffuser being positioned a second distance from the virtual image projection optic, the first distance being different from the second distance; and a controller arranged to control the first and second diffusers to make the real image visible on only one of the first and second diffusers, the holographic projector being configured to project the real image on either of the first and second diffusers, wherein the virtual image projection optic is positioned along an optical axis between the first and second diffusers and a viewing plane, the virtual image projection optic being arranged to form a virtual image of a real image formed on either of the first diffuser and the second diffuser, the virtual image having a substantially different virtual distance from the viewing plane as observed by a user when the real image is visible on the first diffuser as compared to when the real image is visible on the second diffuser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of changing the apparent depth of a virtual image of an object as observed by a user using a plurality of diffusers, the method comprising:
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using a phase-only spatial light modulator, applying a first phase-delay distribution to incident light wherein the phase-delay distribution comprises phase data representative of a first lens and phase data representative of the object to form phase-modulated light; performing an optical Fourier transform of the phase modulated light from the spatial light modulator to form a real image of the object on a first diffuser, the real image being visible on the first diffuser but not on the second diffuser; and forming a virtual image of the real image visible on the first diffuser of the plurality of diffusers using a virtual image projection optic, the first diffuser being a first distance from the virtual image projection optic; and
thenusing a phase-only spatial light modulator, applying a second phase-delay distribution to incident light wherein the phase-delay distribution comprises phase data representative of a second lens and phase data representative of the object to form phase-modulated light; performing an optical Fourier transform of the phase-modulated light from the spatial light modulator to form a real image of the object on a second diffuser of the plurality of diffusers, the real image being visible on the second diffuser but not on the first diffuser, the second diffuser being a second distance from the virtual image projection optic, the first distance being different from the second distance; and forming a virtual image of the real image visible on the second diffuser, wherein the virtual image projection optic is positioned along an optical axis between the first and second diffusers and a viewing plane, the virtual image having a substantially different virtual distance from the viewing plane as observed by a user when the real image is visible on the first diffuser as compared to when the real image is visible on the second diffuser. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A display system comprising:
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a holographic projector arranged to project a two-dimensional real image of an object, the holographic projector comprising a spatial light modulator arranged to apply a phase-delay distribution to incident light, wherein the phase-delay distribution comprises phase data representative of a lens and phase data representative of the object, the real image being a holographic reconstruction resulting from the phase-delay distribution applied to the incident light; and an imaging device, comprising; a virtual image projection optic having a focal distance; a first diffuser and a second diffuser positioned in series along an optical axis from the holographic projector to the virtual image projection optic, the first diffuser being positioned a first distance from the virtual image projection optic, the second diffuser being positioned a second distance from the virtual image projection optic, the first distance being different from the second distance; and a controller arranged to control the first and second diffusers to make the real image visible on only one of the first and second diffusers, the holographic projector being configured to project the real image on either of the first and second diffusers, wherein the virtual image projection optic is positioned along an optical axis between the first and second diffusers and a viewing plane, the virtual image projection optic being arranged to form a virtual image of a real image formed on either of the first diffuser and the second diffuser, the virtual image having a substantially different virtual distance from the viewing plane as observed by a user when the real image is visible on the first diffuser as compared to when the real image is visible on the second diffuser, and wherein the first and second diffusers are positioned within the focal distance of the virtual image projection optic.
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Specification