Ocular Fundus Camera System and Methodology
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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.
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16 Claims
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1-2. -2. (canceled)
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3. An ocular fundus camera system usable in relation to a light-illuminated fundus in a subject'"'"'s eye, and including an elongate, main optical path having upstream and downstream ends and a long axis, and which main path, in an operative condition of the system, extends downstream from a person'"'"'s eye and carries both (a) light that acts as if the pupil were its source and (b) light reflected from, and carrying an image of, the fundus, said system comprising
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 sensor at a location which is upstream from the sensor, and 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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10-11. -11. (canceled)
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12. An ocular fundus camera methodology comprising illuminating the fundus in a subject'"'"'s eye along a main optical path having a long axis,
by said illuminating, creating a light reflection from the fundus which flows therefrom outwardly through the pupil in a flow of reflection light which is directed downstream from the eye along with main optical path'"'"'s long axis, discriminatorily, and in a relative trans-axial displacement manner at a location along the main optical path which is disposed downstream from the eye, shifting solely along the main optic path which is disposed downstream from the eye, shifting solely and non-collimated light which is contained in the flow of created reflection light, detecting any such shifting, and employing any detected shifting in a manner designed to aid in performing auotorefraction.
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13. An ocular fundus, image-focusing camera methodology comprising
illuminating the fundus in a subject'"'"'s eye along an elongate illumination path, by said illuminating, creating a light reflection from the fundus directed therefrom outwardly through the pupil in a flow of reflection light which progresses downstream from the eye along an elongate main optical path having a long axis, discriminatorily, and in a relative trans-axial displacement manner at a location along the main optical path which is disposed downstream from the eye, shifting solely any non-collimated light which is contained in the flow of created reflection light, detecting any such shifting, and employing any detected shifting in a manner designed to minimize the presence of non-collimated light in the reflection-light flow.
Specification