Ocular fundus camera system and methodology
First Claim
1. An ocular fundus camera system comprising:
- an elongate, main optical path having upstream and downstream ends and a long axis, wherein the main optical path, in an operative condition of the system, extends downstream from a person'"'"'s eye and carries (a) light that acts as if the pupil were its source and (b) light reflected from, and carrying an image of, a fundus of the person;
an image-detecting sensor disposed centrally along said main path adjacent the main path'"'"'s downstream end, and in optical communication with light carried in said path,an aperture centered on the main path'"'"'s long axis, operatively associated with, and stationary with respect to, said image-detecting sensor at a location which is upstream from the image-detecting sensor, andan optical, light-content shifting structure, operable selectively for producing, within that portion of the main path which is disposed downstream from the shifting structure, relative trans-axial displacement solely of any non-collimated light carried in that portion of the main path which is disposed upstream from the shifting structure.
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Accused Products
Abstract
An ocular fundus camera system and an associated methodology. The system includes (a) an image sensor disposed along a fundus-image reflection path adjacent that path'"'"'s downstream end, and in optical communication with light carried in this path, (b) an aperture centered on the reflection path'"'"'s long axis, operatively associated with, and stationary with respect to, the sensor at a location which is upstream from the sensor, and (c), for accomplishing (1) precision fundus-image focusing on the sensor, and additionally (2) autorefraction, optical, light-content shifting structure, operable selectively for producing, within that portion of the reflection path which is disposed downstream from the shifting structure, relative trans-axial displacement solely of any non-collimated light carried in that portion of the main path which is disposed upstream from the shifting structure.
80 Citations
11 Claims
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1. An ocular fundus camera system comprising:
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an elongate, main optical path having upstream and downstream ends and a long axis, wherein the main optical path, in an operative condition of the system, extends downstream from a person'"'"'s eye and carries (a) light that acts as if the pupil were its source and (b) light reflected from, and carrying an image of, a fundus of the person; an image-detecting sensor disposed centrally along said main path adjacent the main path'"'"'s downstream end, and in optical communication with light carried in said path, an aperture centered on the main path'"'"'s long axis, operatively associated with, and stationary with respect to, said image-detecting sensor at a location which is upstream from the image-detecting sensor, and an optical, light-content shifting structure, operable selectively for producing, within that portion of the main path which is disposed downstream from the shifting structure, relative trans-axial displacement solely of any non-collimated light carried in that portion of the main path which is disposed upstream from the shifting structure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for using an ocular fundus, image-focusing camera methodology comprising
illuminating the fundus in a subject'"'"'s eye along an elongate illumination path, creating, by said illumination, a light reflection from the fundus directed therefrom outwardly through the pupil in a flow of reflection light which progresses downstream from the eye, shifting solely non-collimated light which is contained in the flow of created reflection light in a discriminatorily and a relative trans-axial displacement manner at a location disposed downstream from the eye, detecting any such shifting, and employing the detected shifting in a manner designed to reduce the presence of non-collimated light in the reflection-light flow.
Specification