A 7.4 kHz, 20-bit image encoder with a CMOS linear image sensor

This paper presents a unique CMOS linear image sensor for reading the pseudo-random code on the slit disc, focusing on the two aspects of low noise and readout rate. Each pixel is equipped with an exclusive integral readout circuit, and the shape of the pixel also matches the slit disc, making the o...

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Bibliographic Details
Published inOptical and quantum electronics Vol. 51; no. 10; pp. 1 - 13
Main Authors Mu, Yusong, Jiang, Jiaqi, Ding, Ning, Ni, Qiliang, Chang, Yuchun
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2019
Springer Nature B.V
Subjects
Angular resolution
Angular speed
Characterization and Evaluation of Materials
Circuits
CMOS
Coders
Computer Communication Networks
Decoding
Electrical Engineering
ENGINEERING
KHZ RANGE 01-100
Lasers
Low noise
NOISE
Optical Devices
OPTICS
Photonics
Physics
Physics and Astronomy
Pixels
Pseudorandom
READOUT SYSTEMS
RESOLUTION
SENSORS
SIGNALS
Integrated optics
Photoelectric device
Metrological instrumentation
Sensors
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Summary:This paper presents a unique CMOS linear image sensor for reading the pseudo-random code on the slit disc, focusing on the two aspects of low noise and readout rate. Each pixel is equipped with an exclusive integral readout circuit, and the shape of the pixel also matches the slit disc, making the output signal consistent by up to 99%. After subdivision, the absolute angle data can be captured with an angular resolution of 16 bits and a maximum speed of 7.4 kHz. In addition, decoding and subdivision methods are suitable for high-speed, inexpensive encoder systems.
ISSN:0306-8919
1572-817X
DOI:10.1007/s11082-019-2037-z