Portable Position Sensitive Detector with Outdoor Environment Resolution

Abstract:

This paper presents the design of a portable optical PSD (Position Sensing Detector) for application in outdoor environment. The system is able to measure changes in the position of a light spot emitted by a usual laser device (635-1000nm wavelength) in outdoor environment. A piece of frosted glass is employed as the target to show the light spot, and a narrow-band filter and 1% neutral filter are adopted to reduce the interference from sunlight. The paper uses a pinhole camera to reduce the device volume, but lens distortion with off-the-shelf cameras is significant. The image manipulation circuit corrects the distortion, and displays the light spot center position.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 767-770
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.767
• Online since: February 2012
• Authors: Qun Ma, Wen Gang Qin, Shi Liang Ma
• Keywords: Image Distortion, Light Spot Center, Pinhole Camera, PSD

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