Improvement and Radiation-Resistance Study of an Optical Displacement Sensing System Based on a Position Sensitive Detector
Source abstract
Abstract
We report a method of improving the precision and resolution of sensing systems based on position sensitive detectors (PSDs). In the method, we improved the precision and resolution by reducing the gain of the condition circuit and conducting spatial filtering on the measured spot position. To demonstrate the method, we experimentally built a PSD-based displacement sensing system. With the system, a precision of 0.3 μm and a resolution of 0.5 μm were obtained. The precision is two orders of magnitude better than that obtained with the use of a commercial condition circuit (SPC02, SiTek, Partille, Sweden) and without using any filter. Moreover, we tested the radiation-resistance performance of the system using a 60Co radiation source. The system kept the precision and resolution after exposure to radiation with a dose set to 100 krad. Our study is very useful to realize high-precision PSD-based sensing in space.
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Research context
OpenAlex topics: Astronomical Observations and Instrumentation · Optical Systems and Laser Technology · Advanced Measurement and Detection Methods
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China
Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, China
Funding
National Nature Science Foundation of China · Center of space utilization, Chinese Academy of Sciences
References (30)
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