Dynamic particle-shape measurements using a near-field optical sensor

Author

Nieuwenhuis, J.H. ; Bastemeijer, J. ; Bossche, A. ; Vellekoop, M.J.

Author_Institution

Inst. IEMW, Vienna Univ. of Technol., Austria

Volume

1

fYear

2002

fDate

2002

Firstpage

130

Abstract

In this paper dynamic particle-shape measurements are presented using a near-field optical sensor. The sensor consists of two elongated photodiodes that are illuminated from the top. When a particles moves over the sensor it will partially block the light, which results in a drop of photocurrent proportional to the width of the particle. We have performed measurements using irregularly shaped PVC test particles having a diameter of 30-80 microns. The measurements prove that accurate size and shape information is obtained under the conditions that are found in a cytometer.

Keywords

biological techniques; optical sensors; particle size measurement; photodetectors; photodiodes; shape measurement; dynamic particle-shape measurements; elongated photodiodes; integrated cytometer; optical sensor near-field; particles width; photocurrent reduction; shape information; size information; Electronics industry; Industrial electronics; Instruments; Optical sensors; Particle measurements; Photoconductivity; Photodiodes; Sensor systems; Shape measurement; Strips;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2002. Proceedings of IEEE

Print_ISBN

0-7803-7454-1

Type

conf

DOI

10.1109/ICSENS.2002.1037003

Filename

1037003