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Optical Engineering

Laser profilometer module based on a low-temperature cofired ceramic substrate
Author(s): Veli Heikkinen; Mikko Heikkinen; Kimmo Keranen; Risto S. Mitikka; Veli-Pekka Putila; Kari Tukkiniemi
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Paper Abstract

We realized a laser profilometer module using low temperature cofired ceramics technology. The device consists of a vertical-cavity surface-emitting laser as the light source and a complementary metal oxide semiconductor image sensor as the detector. The laser transmitter produces a thin light stripe on the measurable object, and the receiver calculates the distance profile using triangulation. Because the design of optoelectronic modules, such as the laser profilometer, is usually carried out using specialized software, its electronic compatibility is very important. We developed a data transmission network using commercial optical, electrical, and mechanical design software, which enabled us to electronically transfer data between the designers. The module electronics were realized with multilayer ceramics technology that eases component assembly by providing precision alignment features in the substrate. The housing was manufactured from aluminum using electronic data transfer from the mechanical design software to the five-axis milling workstation. Target distance profiles were obtained from 100 points with an accuracy varying from 0.1 mm at a 5-cm distance to 2 cm at 1.5 m. The module has potential for distance measurement in portable devices where small size, light weight, and low power consumption are important.

Paper Details

Date Published: 1 September 2005
PDF: 7 pages
Opt. Eng. 44(9) 093603 doi: 10.1117/1.2047067
Published in: Optical Engineering Volume 44, Issue 9
Show Author Affiliations
Veli Heikkinen, VTT Elektroniikka (Finland)
Mikko Heikkinen, VTT Elektroniikka (Finland)
Kimmo Keranen, VTT Elektroniikka (Finland)
Risto S. Mitikka, VTT Elektroniikka (Finland)
Veli-Pekka Putila, Polar Electro Oy (Finland)
Kari Tukkiniemi, VTT Information Technology (Finland)

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