Abstract

A fiber-optic intensity sensor has been developed for vertically positioning microelectrode arrays above the retina of a live frog. Closely spaced fibers illuminate and collect reflections from the retinal surface, and the output is electronically processed to drive an automated positioning circuit. Experimental and theoretical evaluations of fiber types and separation for both specular and diffuse reflectors, in vitro and in vivo, are presented, and multimode fibers on 125-μm centers are chosen for retinal experimentation. The sensor has applications in assessing spatial selectivity of stimulation of a multielectrode array and may be adaptable for lateral positioning.

© 1998 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
In vivo optical neural recording using fiber-based surface plasmon resonance

Shin Ae Kim, Sung June Kim, Hyowon Moon, and Sang Beom Jun
Opt. Lett. 37(4) 614-616 (2012)

Spectral and spatial dependence of diffuse optical signals in response to peripheral nerve stimulation

Debbie K. Chen, M. Kelley Erb, Yunjie Tong, Yang Yu, Angelo Sassaroli, Peter R. Bergethon, and Sergio Fantini
Biomed. Opt. Express 1(3) 923-942 (2010)

Fiber-optic microsensors to measure backscattered light intensity in biofilms

Haluk Beyenal, Zbigniew Lewandowski, Chris Yakymyshyn, Brad Lemley, and Joe Wehri
Appl. Opt. 39(19) 3408-3412 (2000)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription