Method and apparatus for illuminating and imaging eyes through eyeglasses using multiple sources of illumination
DCFirst Claim
Patent Images
1. A method for imaging an area of an object positioned behind a light transmissive structure using illuminators which produce specular reflections on the light transmissive structure wherein at least an approximate diameter of the area to be imaged is known comprising:
- a. providing first and second illuminators positioned a distance apart from one another which is not less than the known at least approximate diameter;
such that a distance between the specular reflections on the transmissive structure due to each illuminator are not less than the at least an approximate diameter of the area on the object to be imaged;
b. illuminating the area with the first illuminator and checking to see if the illuminator has produced a specular reflection that obscures the area of the object;
c. if the first illuminator has produced a specular reflection that obscures the area of the object then illuminating the area with the second illuminator;
d. obtaining an image of the area while the first illuminator is on if the first illuminator has produced a specular reflection that has not obscured the area; and
e. obtaining an image of the area while the second illuminator is on if the first illuminator has produced a specular reflection that has obscured the area.
8 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A reliable method of illuminating and imaging an eye through eyeglasses uses a carefully selected subset of multiple monochromatic light sources, a camera with an imager that exhibits minimal blooming, and a narrow-bandwidth optical bandpass filter to filter out most of the ambient illumination while passing most of the light from the system'"'"'s own illuminator.
-
Citations
16 Claims
-
1. A method for imaging an area of an object positioned behind a light transmissive structure using illuminators which produce specular reflections on the light transmissive structure wherein at least an approximate diameter of the area to be imaged is known comprising:
-
a. providing first and second illuminators positioned a distance apart from one another which is not less than the known at least approximate diameter;
such that a distance between the specular reflections on the transmissive structure due to each illuminator are not less than the at least an approximate diameter of the area on the object to be imaged;b. illuminating the area with the first illuminator and checking to see if the illuminator has produced a specular reflection that obscures the area of the object; c. if the first illuminator has produced a specular reflection that obscures the area of the object then illuminating the area with the second illuminator; d. obtaining an image of the area while the first illuminator is on if the first illuminator has produced a specular reflection that has not obscured the area; and e. obtaining an image of the area while the second illuminator is on if the first illuminator has produced a specular reflection that has obscured the area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification