Beam shaping component and method
First Claim
1. A data projector comprising:
- at least one micro-display;
at least one light source chip; and
at least one optically transparent relay prism disposed between the micro-display and the light source chip, where the relay prism comprises an input surface and an output surface arranged to impose a tilt to a system optical axis between the micro-display and the light source.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical device includes a source such as an LED, a microdisplay such as an LCoS panel, and a relay prism between them. The relay prism has input and output surfaces arranged to tilt the system optical axis. At least one of those surfaces is a cylindrical surface that, along with the tilt, changes the aspect ratio AR of light emanating from the source to the AR of the microdisplay without clipping. The cylindrical surface defines parallel cross sections, each of which define a center of curvature that together define a line that crosses the system optical axis or an extension thereof. This preserves total luminance since clipping is not used to change the AR, and provides substantially uniform illumination across the new AR. Also detailed is a method and further details of an exemplary pocket sized optical engine for which the output of the microdisplay is directed to a projection lens.
41 Citations
25 Claims
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1. A data projector comprising:
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at least one micro-display; at least one light source chip; and at least one optically transparent relay prism disposed between the micro-display and the light source chip, where the relay prism comprises an input surface and an output surface arranged to impose a tilt to a system optical axis between the micro-display and the light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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illumination means; display means; lens means disposed between the display means and the illumination means, the lens means comprising a first surface and a second surface arranged for imposing a tilt to a system optical axis between the illumination means and the display means. - View Dependent Claims (15, 16, 17, 18)
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19. A method for manipulating light comprising:
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emanating light from a source to a relay prism along a first portion of a system optical axis; passing the emanated light through the relay prism; outputting the emanated light from the relay prism along a second portion of the system optical axis that is tilted with respect to the first portion; and displaying the light output from the relay prism at a micro-display. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification