Claims
- 1. An apparatus for applying an optical signal to a surface and collecting the light emitted by said surface in response to said application of said optical signal, said optical signal and said collected light traversing an optical fiber having an end proximate to said surface, said apparatus comprising:a lens for coupling said optical signal to said surface and for collecting said light emitted by said surface and coupling said collected light into said optical fiber; a detector for measuring the intensity of light collected in said optical fiber and for generating a detection signal indicative of said measured intensity as a function of time; and means for moving one of said lens and said optical fiber relative to the other at a first frequency back and forth along a first axis, said lens having an average position relative to said optical fiber along said first axis controlled by said moving means, said average position being repetitively adjusted to maximize the average power of said detection signal at said first frequency, wherein said first axis is perpendicular to the axis of said lens.
- 2. The apparatus of claim 1 further comprising:a beam splitter between said proximate end of said optical fiber and said lens, said beam splitter directing a portion of said light collected by said lens to said detector.
CROSS REFERENCE TO RELATED APPLICATION(S)
This is a continuation of application Ser. No. 08/556,890 filed on Nov. 2, 1995, and now U.S. Pat. No. 6,215,118.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4358774 |
Wilkinson |
Nov 1982 |
|
4445209 |
Mickleson et al. |
Apr 1984 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
08/556890 |
Nov 1995 |
US |
Child |
09/783571 |
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US |