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Self-Balancing Position-Sensitive Detector (SBPSD)
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DOI：10.3390/s150717483.png)
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摘要
En 中文
Optical position-sensitive detectors (PSDs) are a non-contact method of tracking the location of a light spot. Silicon-based versions of such sensors are fabricated with standard CMOS technology, are inexpensive and provide a real-time, analog signal output corresponding to the position of the light spot. An innovative type of optical position sensor was developed using two back-to-back connected photodiodes. These so called self-balancing position-sensitive detectors (SBPSDs) eliminate the need for external readout circuitry entirely. Fabricated prototype devices demonstrate linear, symmetric coordinate characteristics and a spatial resolution of 200 m for a 74 mm device. PSDs are commercially available only up to a length of 37 mm. Prototype devices were fabricated with various lengths up to 100 mm and can be scaled down to any size below that.
Keyword:
PSD
back-to-back connected photodiode
linear position sensor
optical position sensor
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期刊
IF:
3.5
论文数:
7.2W
被引数:
20.9W
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