Optical head probe using a gradient index lens and optical fiber

Details Optical head probe using a gradient index lens and optical fiber Optical head probe using a gradient index lens and optical fiber

1993-09-24

1995-04-25

Evans, F. L.

Optics: measuring and testing

Of light reflection

With diffusion

385 12, G01N 2147

Patent

active

054104130

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.

REFERENCES:
patent: 5298741 (1994-03-01), Klalt et al.

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