3D Measurement with SiTek PSD-Array

LASER COMPONENTS announce the extension of their standard range of Position Sensing Detectors (PSDs) from SiTek, Sweden, with a PSD array.

The PSD array consists of 16 parallel one-dimensional PSD elements on the same chip. By utilising the triangulation technique the reflection of a laser line or multiple laser spots onto the PSD array will provide information about the contour of the illuminated object. The possibility for simultaneous readout of the 16 elements together with the fast response of each element makes the PSD array suitable for applications like high speed 3D contour measurements and measurements of parallel, moving objects such as cantilevers.

To ensure high sensitivity the gap between the elements has been minimised giving a fill factor of more than 97%, but still with the low crosstalk and same high linearity as SiTek’s other one-dimensional PSDs. In order to preserve the performance under stray light conditions the PSD array has been designed with SiTek’s unique built in stray light elimination feature, a patented design which eliminates the decrease in speed and linearity normally attributable to stray light.

The PSD array is delivered in a 34 pin dual in line type ceramic package measuring 2.5 mm in length but can be custom designed to any length and/or number of PSD elements.