Method and apparatus for positioning subjects using a holographic optical element
First Claim
1. An alignment device for directing a user'"'"'s eye to at least one selected point in space relative to the alignment device, the alignment device comprising a holographic optical element having indicia, the indicia sized and configured to indicate to a user when the user'"'"'s eye is at the at least one selected point such that when the user sees an indicia that indicia will either direct the user to move in a direction toward the at least one selected point or indicate that the user'"'"'s eye is at the at least one selected point.
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Accused Products
Abstract
A system and method of positioning an eye of a subject at a selected point in space uses a holographic optical element containing indicia. The indicia are selectively visible to a user when the user is outside a volume surrounding the selected point and direct the user toward the volume. This system can be used with a camera to take an image of the eye from which the subject can be identified.
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Citations
39 Claims
- 1. An alignment device for directing a user'"'"'s eye to at least one selected point in space relative to the alignment device, the alignment device comprising a holographic optical element having indicia, the indicia sized and configured to indicate to a user when the user'"'"'s eye is at the at least one selected point such that when the user sees an indicia that indicia will either direct the user to move in a direction toward the at least one selected point or indicate that the user'"'"'s eye is at the at least one selected point.
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11. An alignment and imaging device for imaging an eye located within a volume surrounding a selected point in space comprised of:
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a. a camera;
b. a lens positioned to focus the camera on the selected point in space so that light reflected from an eye at the selected point in space will pass through the lens and be formed into a convergent beam which converges on the focal point of the camera; and
c. a holographic optical element having indicia, the indicia sized and configured such that when the user sees an indicia that indicia will either direct the user to move in a direction toward the volume or indicate that the user'"'"'s eye is within the volume. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An alignment and imaging device for imaging an eye located within a volume surrounding a selected point in space comprised of:
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a. a camera;
b. a lens positioned to focus the camera on the selected point in space so that light reflected from an eye at the selected point in space will pass through the lens and be formed into a convergent beam which converges on the focal point of the camera; and
c. at least one holographic optical element indicator positioned near the camera which tells the user either that the user is within the volume or directs the user to move in a direction toward the volume. - View Dependent Claims (33)
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34. A method of positioning an eye of a user within a volume surrounding a selected point in space comprising the steps of:
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a. selecting a volume surrounding a specific point in space at which an eye of the user is desired to e positioned;
b. providing a holographic optical element indicator having indicia, the indicia sized and configured to indicate to a user when the user'"'"'s eye is within the volume such that when the user sees an indicia that indicia will either direct the user to move in a direction toward the volume or indicate that the user'"'"'s eye is within the volume; and
c. instructing the subject to move his head to a position at which the indicia indicate that the user'"'"'s eye is within the volume. - View Dependent Claims (35, 36, 37, 38, 39)
a. providing processor and memory connected to the camera which contains a program for receiving an image from the camera;
b. taking an image with the camera;
c. evaluating whether the image is acceptable for further processing; and
d. when an acceptable image has been obtained, activating an indicator which tells the user that an acceptable image has been obtained.
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Specification