Optical coherence tomography with dynamic coherent focus

Details Optical coherence tomography with dynamic coherent focus Optical coherence tomography with dynamic coherent focus

1999-03-30

2000-05-02

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902

Patent

active

06057920&

ABSTRACT:
In coherence tomography, an interferometric measurement light beam scans the measurement object and is focused for improving the transverse resolution. In order to achieve a high transverse resolution over the entire object depth, the focal displacement and the change in path length in the measurement light beam for maintaining the coherence of the focus is achieved by one and the same moving optical element in the measurement light beam. The present invention achieves this by a particularly simple and easily adjustable arrangement which is characterized by especially low light loss in the measurement beam path.

REFERENCES:
patent: 5321501 (1994-06-01), Swanson et al.
patent: 5847827 (1998-12-01), Fercher
patent: 5877856 (1999-03-01), Fercher
Absolute optical ranging using low coherence interferometry, danielson et al, Applied Optics, Jul. 1991, pp. 2975-2979.

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