Title :
A Circuit Design of High-Precision Micro-Displacement Sensor System for DVD Pickup Head
Author :
Li, Yong ; Wu, Kui ; Ai, Zhu-Jun
Author_Institution :
Sch. of Instrum. Sci. & Opto-Electr. Eng., Hefei Univ. of Technol., Hefei, China
Abstract :
The voice coil motor VCM will be removed in the structure, and we have designed a new high-precision displacement measurement of the circuit, which mainly includes focus error signal of the DVD (S curve) processing circuit, LD control circuit, open signal logic circuit, S curve linearity zone selection and location to determine the circuit, the normalized circuit and other components, to achieve the accurate measurement of the micro-component (geometric dimensions for a few millimeters to a few microns, more precision parameters for the micro nanometer scale). It has simple structure, good linearity, high resolution, anti-interference capability, measuring in any environment., and other outstanding features.
Keywords :
coils; digital versatile discs; displacement measurement; logic circuits; microsensors; optical variables measurement; DVD pickup head; LD control circuit; S curve linearity zone selection; S curve processing circuit; VCM; antiinterference capability; circuit design; focus error signal; high-precision micro-displacement sensor system; open signal logic circuit; optical measurement; voice coil motor; DVD; Laser beams; Lenses; Measurement by laser beam; Noise measurement; Optical variables measurement; Probes;
Conference_Titel :
Photonics and Optoelectronics (SOPO), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0909-8
DOI :
10.1109/SOPO.2012.6270450
