Polymer microlens with independent control of radius and focal length for an imaging fiber

Mohammed Ashraf; Franck Chollet; Murukeshan Matham; Chun Yang

doi:10.1117/12.639016

28 December 2005 Polymer microlens with independent control of radius and focal length for an imaging fiber

Mohammed Ashraf, Franck Chollet, Murukeshan Matham, Chun Yang

Proceedings Volume 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV; 603709 (2005) https://doi.org/10.1117/12.639016
Event: Microelectronics, MEMS, and Nanotechnology, 2005, Brisbane, Australia

Abstract

Fabrication of microlens array using polymer reflow is beginning to be a mainstream process, whether the polymer is directly used or whether the spherical profile is transferred by plasma etching to a glass substrate as, for example, in some handphone cameras. The focus so far has been on uniformity and obtaining lenses with equal radius and equal focal length. Actually it is easy to show using a phenomenological model that the focal length is depending on the lens radius, and not much on the contact angle, an effect that can be traced to the line tension force. For a biomedical application we need to terminate a 600um diameter imaging fiber with a group of lenses of different diameters - but with similar focal length. We have devised a microfabrication process on a silicon wafer to produce the lens with variable diameter and identical focal length, while etching the silicon wafer has helped us producing a sheath to insert the optical fiber and mount the lenses on the optical fiber.

Citation Download Citation

Mohammed Ashraf, Franck Chollet, Murukeshan Matham, and Chun Yang "Polymer microlens with independent control of radius and focal length for an imaging fiber", Proc. SPIE 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV, 603709 (28 December 2005); https://doi.org/10.1117/12.639016

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