Patent ID: 6252977
Filing Date: 2001-06-26
Classification: A61B

Abstract:
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;c. obtaining a first image of the area while the first illuminator is on;d. illuminating the area with the second illuminator;e. obtaining a second image of the area while the second illuminator is on;f. checking at least one of the first image and the second image to see if a specular reflection has obscured the area; andg. selecting one of the first image and the second image to have a selected image in which a specular reflection does not obscure the area.