Optical head probe using a gradient index lens and optical fibers
First Claim
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1. An optical probe head, comprising:
- (a) a gradient index lens, at least one face of which is in contact with the sample;
(b) a plurality of transmitting optical fibers for inputting radiation into said gradient index lens in at least two optical locations of said gradient index lens;
(c) at least one receiving optical fiber for receiving reflected radiation, said transmitting optical fibers and said at least one receiving optical fiber being fixedly held relative m said gradient index lens; and
(d) means for processing said reflected radiation so as to obtain depth-related reflection information.
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Abstract
An optical probe head for determining properties of the sample as a function of the depth of the sample, which is made up of a gradient index lens, at least one face of which is in contact with the sample, a number of transmitting optical fibers, preferably made up of a number of concentrically located sets, for inputting radiation into the gradient index lens in at least two optical locations, a mechanism for cycling the input radiation among the transmitting optical fibers, a receiving optical fiber, preferably centrally located, for receiving reflected radiation and a mechanism for processing the reflected radiation to obtain depth-related reflection information.
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7 Claims
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1. An optical probe head, comprising:
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(a) a gradient index lens, at least one face of which is in contact with the sample; (b) a plurality of transmitting optical fibers for inputting radiation into said gradient index lens in at least two optical locations of said gradient index lens; (c) at least one receiving optical fiber for receiving reflected radiation, said transmitting optical fibers and said at least one receiving optical fiber being fixedly held relative m said gradient index lens; and (d) means for processing said reflected radiation so as to obtain depth-related reflection information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification