Performance tests of an angular scan LED array-based range-imaging sensor

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Abstract
In the paper a new angular scan triangulation range scanner is described using an integrated array of LED chips and a lateral-effect position-sensing detector. A range map is obtained by means of fast electronic scanning of the chips of an integrated LED array. One LED of the array operates at a time and a certain on-off switching sequence is applied. In the paper the operation principle of the scanner is presented and a design of the sensor prototype using a linear array of 32 LEDs is reported. Experimental tests for evaluation of the sensor performance are described, including range accuracy, precision, time of range image acquisition, and geometrical properties of the sensitive volume of the sensor. Range measurement tests for targets located at different angles in relation to the sensor and profile measurements of cylindrical objects are also reported.

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