Title :
High-speed path length scanning using a Herriott cell delay line
Author :
Hsiung, Pao-Ann ; Li, Xiao Dong ; Hartl, I. ; Ko, Tae Kuk ; Chudoba, C. ; Fujimoto, J.G.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
Abstract :
Summary form only given. Optical coherence tomography (OCT) has been extensively investigated as a diagnostic tool in a variety of medical fields, demonstrating its feasibility as a high speed, non-invasive, high resolution in vivo and in situ imaging modality. Typical OCT systems require a mechanically translating reference arm mirror to achieve axial scanning. Scan velocities for galvonometer based scanning systems are limited by mechanical inertia to approximately 3 cm/s with repetition rates of /spl sim/100 Hz. In order to remove motion artifact for imaging in vivo, image acquisition rates of several frames per second are necessary. We demonstrate a simple, low cost, alternative scanning delay line capable of scanning over several millimeters at 2 kHz repetition frequency. The system uses a multi-pass mirror geometry based on a Herriott type cell, which accumulates differential delays in each pass.
Keywords :
biomedical equipment; biomedical imaging; mirrors; optical delay lines; optical scanners; optical tomography; Herriott cell delay line; beam spot deviation; broadband gold mirrors; broadband sources; double-pass arrangement; high resolution functional imaging; high-speed path length scanning; in situ imaging; in vivo imaging; motion artifact; multipass mirror geometry; optical coherence tomography; tadpole images; Biomedical imaging; Biomedical optical imaging; Delay lines; High speed optical techniques; Image resolution; In vivo; Medical diagnostic imaging; Mirrors; Optical imaging; Tomography;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.947844
