Optical apparatus for virtual interface projection and sensing
First Claim
1. Optical apparatus comprising:
- a non-periodic diffractive optical element receiving an illuminating beam from an illuminating beam source at an impingement location thereon and deflecting said illuminating beam as a deflected beam onto a projection plane at an angle which varies according to a position of said impingement location on said diffractive optical elements; and
a displacer associated with at least one of said diffractive optical element and said illuminating beam and being operative to vary the position of said impingement location of said illuminating beam on said diffractive optical element.
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Abstract
Optical and mechanical apparatus and methods for improved virtual interface projection and detection, by combining this function with still or video imaging functions. The apparatus comprises optics for imaging multiple imaged fields onto a single electronic imaging sensor. One of these imaged fields can be an infra red data entry sensing functionality, and the other can be any one or more of still picture imaging, video imaging or close-up photography. The apparatus is sufficiently compact to be installable within a cellular telephone or personal digital assistant. Opto-mechanical arrangements are provided for capturing these different fields of view from different directions. Methods and apparatus are provided for efficient projection of image templates using diffractive optical elements. Methods and apparatus are provided for using diffractive optical elements to provide efficient scanning methods, in one or two dimensions.
175 Citations
18 Claims
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1. Optical apparatus comprising:
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a non-periodic diffractive optical element receiving an illuminating beam from an illuminating beam source at an impingement location thereon and deflecting said illuminating beam as a deflected beam onto a projection plane at an angle which varies according to a position of said impingement location on said diffractive optical elements; and
a displacer associated with at least one of said diffractive optical element and said illuminating beam and being operative to vary the position of said impingement location of said illuminating beam on said diffractive optical element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16, 17, 18)
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12. An on-axis two dimensional optical scanning apparatus, comprising:
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a diffractive optical element, operative to deflect a beam impinging thereon at an impingement location in two dimensions as a function of the position of said impingement location of said beam on said diffractive optical element;
a relatively low mass support structure supporting said diffractive optical element is mounted;
a first frame external to said low mass support structure supporting said low mass support via first support members in a manner whereby said low mass support structure can undergo a first oscillation at a first frequency in a first direction;
a second frame external to said first frame, support said first frame via second support members in a manner whereby said second frame can undergo a second oscillation at a second frequency in a second direction; and
at least one drive mechanism for exciting at least one of said first and second oscillations. - View Dependent Claims (13, 14)
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Specification