(63) Continuation of application No. 09/603,806, filed on Jun.(List continued on next page.)
26, 2000, now Pat. No. 6,282,011, which is a division of application No. 09/079,687, filed on …

An apparatus for performing high speed scanning of an optical delay and its application for
performing optical interferometry, ranging, and imaging, including cross sectional imaging …

(60) Division of application No. 09/079,687, filed on May 15, Primary Examiner-Georgia
Epps 1998, now Pat. No. 6,111,645, and a continuation-in-part of Assistant Examiner David …

3,090,753 3,601.480 3,856,000 3,872.407 3,941,121 3,973,219 3,983,507 4,030,827
4,140,364 4,141,362 4,224,929 4,295,738 4,300,816 4,303.300 4,428,643 4,479,499 …

The invention features methods and systems in which wavelength-tune PSI data is analyzed
in the frequency domain to produce Spectrally Separated frequency peaks each …

5,489,984 A 2/1996 Hariharan et al. 5,538.898 A 7/1996 Wickramasinghe et al. 5,585,913 A
12/1996 Hariharan et al. 5,623,145 A 4/1997 Nuss 5,710,430 A 1/1998 Nuss 5,729,017 A …

Phase detection between interfering light beams in an interferometric system is
accomplished by frequency shifting the reference beam prior to combination with 22 Filed …

Embodiments of the present invention are method and apparatus for Simply and
economically providing efficient Scanning in an optical coherence tomography (" OCT) …

Diffraction grating based fiber optic interferometric systems for use in optical coherence
tomography, wherein sample and reference light beams are formed by a first beam splitter …

R; diffractive optical element defining a spatially low frequency phase transition. The optical
element and the imaging lens define a predetermined pattern formed by spaced-apart Sub …