On 3D Scanning Technologies for Respiratory Mask Design

Abstract

Within the Philips Research project a handheld, 3D face scanner has been developed to address the needs of CPAP mask design for Philips Respironics business unit. The scanner is based on the structure light technology proposed in {[}10], which is claimed to be motion robust, i.e. in typical conditions with shaky hands and moving objects, the scanner delivers sub-millimetre accurate 3D face models, suitable for the CPAP mask design applications. In this article we derive an analytic expression for the accuracy of the structured light scanner, where the lateral and axial measurement errors as a function of the hardware parameters and the object position and velocity. The analytic formulas can contribute to better understanding the motion invariant structured light technology and creates a room for the scanner specifications.