New small-diameter fiber optic absorbance sensor for continuous spectral scanning

David A. Landis; Carl J. Seliskar

doi:10.1117/12.180801

21 July 1994 New small-diameter fiber optic absorbance sensor for continuous spectral scanning

David A. Landis, Carl J. Seliskar

Proceedings Volume 2136, Biochemical Diagnostic Instrumentation; (1994) https://doi.org/10.1117/12.180801
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

A new efficient fiber optic absorbance sensor is described. The sensor can be configured with optical pathlengths from a few millimeters to 10 cm while maintaining high throughput. The sensor contains a graded index (GRIN) microlens which is ground for a specific sensor optical configuration. The sensor is able to be configured in several diameters ranging from sizes that fit within clinically acceptable gauge hypodermic needles to several millimeter diameter sizes. The sensor has currently been tested for the near-UV-VIS and near-IR spectral regions. Optical test results for several sensor sizes are presented and compared to sensor configurations described previously in the literature. A brief analysis of the sensor design is given in terms of the physical optics of the graded-index lens/multimode fiber optic couples which lead to high optical efficiencies. Example numerical simulations of the sensor optical efficiency are presented and compared with experimental results. Sample spectra and performance results also are presented.

Citation Download Citation

David A. Landis and Carl J. Seliskar "New small-diameter fiber optic absorbance sensor for continuous spectral scanning", Proc. SPIE 2136, Biochemical Diagnostic Instrumentation, (21 July 1994); https://doi.org/10.1117/12.180801

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