Method and apparatus for optical sampling to reduce interfering variances
First Claim
Patent Images
1. A method of minimizing the variations in optical pathlengths in a testing apparatus comprising the steps ofproviding a source of illuminating radiation for illuminating a sample, said illuminating source being in the form of one or more radiation sources;
- arranging said illumination source adjacent to a reflective enclosure that at least partially encloses said sample in a radial direction with no more than a single opening in the radial direction, any opening in said reflective enclosure being substantially equal or smaller in size than the width of said sample, and at least one of said radiation sources being located within said reflective enclosure;
illuminating said sample with radiation from said illumination source; and
detecting radiation emerging from said sample with a detector.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a method and apparatus of that utilizes a reflective enclosure to simulate optical homogeneity in an otherwise inhomogeneous sample. The illumination sources and sample are placed within the reflective enclosure, thus providing a method for examining a sample that is different from transmission, reflection or transflection. This apparatus and method are particularly well adapted to in vivo non-invasive testing for constituents of blood.
190 Citations
30 Claims
-
1. A method of minimizing the variations in optical pathlengths in a testing apparatus comprising the steps of
providing a source of illuminating radiation for illuminating a sample, said illuminating source being in the form of one or more radiation sources; -
arranging said illumination source adjacent to a reflective enclosure that at least partially encloses said sample in a radial direction with no more than a single opening in the radial direction, any opening in said reflective enclosure being substantially equal or smaller in size than the width of said sample, and at least one of said radiation sources being located within said reflective enclosure; illuminating said sample with radiation from said illumination source; and detecting radiation emerging from said sample with a detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A testing apparatus for simulating sample homogeneity comprising:
-
a source of illuminating radiation for illuminating a sample, said illumination source being arranged adjacent to a reflective enclosure that at last partially encloses said sample in a radial direction with no more than a single opening in a radial direction, any opening in said reflective enclosure being substantially equal or smaller in size than the width of said sample, and said source of illuminating radiation being in the form of one or more radiation sources, at least one of said radiation sources being located within said reflective enclosure; and a detector for detecting radiation emerging from said sample. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification