Axicon lens for high-resolution optical coherence tomography over a long focus depth

Zhihua Ding; Hongwu Ren; Yonghua Zhao; J. Stuart Nelson M.D.; Zhongping Chen

doi:10.1117/12.470468

14 June 2002 Axicon lens for high-resolution optical coherence tomography over a long focus depth

Zhihua Ding, Hongwu Ren, Yonghua Zhao, J. Stuart Nelson M.D., Zhongping Chen

Proceedings Volume 4619, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications VI; (2002) https://doi.org/10.1117/12.470468
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

Abstract

In optical coherence tomography (OCT), axial and lateral resolutions are determined by the source coherence length and numerical aperture of the sampling lens, respectively. While axial resolution can be improved using a broadband light source, there is a trade-off between lateral resolution and focus depth when conventional optical elements are used. In this paper, we report on the incorporation of an axicon lens into the sample arm of the interferometer to overcome this limitation. Using an axicon lens with a top angle of 160 degrees, 10 micrometers or better lateral resolution is maintained over a focus depth of at least 6 mm. In addition to high lateral resolution, the focusing spot intensity is approximately constant over the whole focus depth.

Citation Download Citation

Zhihua Ding, Hongwu Ren, Yonghua Zhao, J. Stuart Nelson M.D., and Zhongping Chen "Axicon lens for high-resolution optical coherence tomography over a long focus depth", Proc. SPIE 4619, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications VI, (14 June 2002); https://doi.org/10.1117/12.470468

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available