Patent ID: 11964560
Assignee: ENVISICS LTD
Field: Optics (Instruments)
Classification: CPC B  G | IPC B  G

Claim 1:
2. A head-up display for a vehicle arranged to display a picture, the head-up display comprising:
a first optical sub-system arranged to output a spatially-modulated light field, wherein the first optical sub-system comprises:
a light source arranged to emit light; and
a spatial light modulator arranged to receive the light from the light source and spatially-modulate the light in accordance with a computer-generated hologram displayed on the spatial light modulator; and

a second optical sub-system arranged to receive the spatially-modulated light field from the first optical sub-system and to project the spatially-modulated light field onto a windscreen of the vehicle to form a virtual image on the windscreen,
wherein the first optical sub-system is arranged to be disposed proximate an upper region of the windscreen and the second optical sub-system is arranged to be disposed underneath the dashboard of the vehicle proximate a lower region of the windscreen; and
wherein the second optical sub-system is arranged to perform an optical Fourier transform of the spatially-modulated light field.