Eye imaging unit having a circular light guide
AssigneeResearch Development Foundation
InventorsNorbert A. Massie, Wei Su
Life of this patent
Estimating the term…
Abstract
An eye imaging system having a portable image capture unit having a circular light guide positioned adjacent to and behind a corneal contact lens for controlling directing light over a wide field to the retina of an eye and provide more light towards the center of the eye.
Claims16
In an eye imaging portable image capture unit having a housing, a light source providing light in the housing for transmittal to an eye, imaging and focusing optics in the housing having a corneal contact lens for receiving reflected light from the eye through the cornea, an array image sensor in the housing for receiving light from the eye through the imaging and focusing optics in the housing, the improvement comprising,
- a circular light guide positioned in the housing and positioned behind the corneal contact lens, said light guide including a solid one piece ring with a front end and a back end, said front end positioned at an angle converging inwardly and positioned adjacent the corneal contact lens, and said back end positioned to receive light from the light source.
The eye imaging portable image capture unit comprising,
- a housing,
- a light source providing light in the housing for transmittal
- to an eye,
- imaging and focusing optics in the housing having a front lens set and a rear lens set and a corneal contact lens positioned adjacent the front lens set, said contact lens having a larger diameter than the front lens set,
- a chromatic charged coupled device in the housing for receiving light from the eye through the imaging and focusing optics,
- a circular light guide positioned in the housing around the front lens set and behind the corneal contact lens, said light guide including a solid one-piece ring with a front end and a back end, said front end positioned at an angle converging inwardly and positioned against the corneal contact lens, and said back end positioned to receive light from the light source.
Dependencies are inferred from the claim text.