Share Email Print
cover

Proceedings Paper

Laser diode in combination with position-sensitive device forms a new model of liquid concentration sensor
Author(s): Zhiwen Pan; Shuwen Yang; Maoguo Cai
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

This paper introduces, for the first time to the authors' knowledge, a novel use of laser diode (LD) in forming a sensor to measure the optical refractive index or concentration of liquids. The way described is also appropriate for precise displacement measurement, location and collimation. Special design by combining a LD and a position sensitive device enables this sensor to work for on-line test and remote control. This sensor is significantly much simpler in structure than those refractometers based on the optical principle of total reflection, which usually need complicated optical and/or electrical systems for achromatization, beam scanning or observation like Abbe Refractometers or those refractometers with CCD. With this sensor, we get a resolution power of refractive index of 0.0001 and a dynamic index range of 1.3330 up to 1.4247, corresponding to a range of sugar concentration in aqueous solution of about 0-52 percent at 20 degrees C. A better result is expectable.

Paper Details

Date Published: 24 September 1996
PDF: 5 pages
Proc. SPIE 2886, Semiconductor Lasers II, (24 September 1996); doi: 10.1117/12.251892
Show Author Affiliations
Zhiwen Pan, Shenzhen Univ. (China)
Shuwen Yang, Shenzhen Univ. (China)
Maoguo Cai, Shenzhen Univ. (China)


Published in SPIE Proceedings Vol. 2886:
Semiconductor Lasers II
Siamak Forouhar; Qiming Wang, Editor(s)

© SPIE. Terms of Use
Back to Top