System and method for projecting an image (such as an ERG pattern) onto the retina
AssigneeAmerican Cyanamid Company
InventorsDaniel R. Peters, John Tabaoda
Life of this patent
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Abstract
A pattern ERG (PERG) projector includes a coherent light source (32) for generating a projection beam, modulation optics (34) for modulating the projection beam with an alternating ERG interference pattern with a selected spatial and alternation frequency, and wide angle imaging optics (36) for focusing the projection beam such that it passes through the pupil, and then diverges to project onto a selected portion of the retina.
Claims26
A retinal projection system for projecting an image onto a selected area of a retina of an eye, said retinal projection system comprising:
- a light source for providing a projection beam of at least partially coherent light;
- modulation optics for modulating said projection beam with a desired image to form a modulated projection beam;
- and
- wide angle imaging optics for focusing said modulated projection beam, whereby said modulated projection beam passes through the pupil of the eye and diverges to project an image on the retina, said image having a field-of-view that includes an area anterior to the posterior 25.degree. of the visual field of the retina.
An ERG pattern projection (PERG) system for projecting an ERG pattern onto a selected area of a retina of an eye, said PERG system comprising:
- a light source for providing a projection beam of at least partially coherent light;
- modulation optics for modulating said projection beam to create a desired ERG pattern and for selectively shifting said ERG pattern to create an ERG response from said retina;
- imaging optics for focusing said ERG pattern, whereby said ERG pattern passes through the pupil of the eye and diverges to project an ERG pattern image on a selected area of the retina, said ERG pattern image having a field-of-view that includes an area anterior to the posterior 25.degree. of the visual field of the retina.
A retinal projection method for selectively projecting an image onto a selected area of a retina, comprising the steps:
- generating a projection beam of at least partially coherent light;
- modulating said projection beam with a desired image to form a modulated projection beam;
- and
- focusing said modulated projection beam, such that said modulated projection beam passes through the pupil of the eye and diverges to project an image on the retina, said image having a field-of-view that includes an area anterior to the posterior 25.degree. of the visual field of said retina.
An ERG pattern projection (PERG) method for projecting an ERG pattern onto a selected area of the retina, comprising the steps:
- generating a projection beam of at least partially coherent light;
- modulating said projection beam to create a desired ERG pattern,
- focusing said ERG pattern, such that said ERG pattern passes through the pupil of the eye and diverges to project an ERG pattern image on the retina, said ERG pattern image having a field-of-view that includes an area anterior to the posterior 25.degree. of the visual field of the retina;
- and
- selectively shifting a phase of said ERG pattern to create an ERG response from said retina.
Dependencies are inferred from the claim text.