Synchronous Detection to Reduce Offsets in Focus Error of an Optical Pickup Unit

2021 ◽  
Vol 70 ◽  
pp. 1-8
Author(s):  
Rekha S. Sekar ◽  
Arvind Ajoy
Keyword(s):  
Optical Pickup ◽  
Synchronous Detection

Double Samples Synchronous Detection Sensor based on Up-Core Photonic Crystal Fiber

Optik ◽  
2020 ◽  
Vol 224 ◽  
pp. 165522
Author(s):  
Pibin Bing ◽  
Guifang Wu ◽  
Jialei Sui ◽  
Hongtao Zhang ◽  
Lian Tan ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Synchronous Detection ◽  
Crystal Fiber

scholarly journals Fabrication of Multipole Magnets with Enhanced Flux Density Using Anisotropic Bond Magnets for Miniature Optical Pickup Devices

2015 ◽  
Vol 39 (4) ◽  
pp. 161-165 ◽  
Author(s):  
Shinji Isogami ◽  
Takuya Sakai ◽  
Masatoshi Kanamaru ◽  
Yasunobu Inaba ◽  
Masami Kojima ◽  
...  
Keyword(s):  
Flux Density ◽  
Optical Pickup

Triple-wavelength optical pickup head designs for compact disk, digital versatile disk and high-density digital versatile disk devices

2005 ◽  
Vol 52 (17) ◽  
pp. 2523-2547 ◽  
Author(s):  
Wen-Shing Sun ◽  
Ching-Cherng Sun * ◽  
Jen-Tsorng Chang ◽  
Chuen-Lin Tien ◽  
Shih-Hsin Ma ◽  
...  
Keyword(s):  
High Density ◽  
Compact Disk ◽  
Optical Pickup ◽  
Optical Pickup Head ◽  
Digital Versatile Disk

The lock-in CCD-two-dimensional synchronous detection of light

1995 ◽  
Vol 31 (9) ◽  
pp. 1705-1708 ◽  
Author(s):  
T. Spirig ◽  
P. Seitz ◽  
O. Vietze ◽  
F. Heitger
Keyword(s):  
Two Dimensional ◽  
Synchronous Detection ◽  
Lock In

IDENTIFICATION OF VISCOELASTIC MODEL OF FOUR-WIRE SUSPENSION SYSTEM IN OPTICAL PICKUP ACTUATOR

2017 ◽  
Vol 41 (5) ◽  
pp. 731-744
Author(s):  
Ren J. Chang ◽  
Zheng Y. Liu
Keyword(s):  
Transfer Function ◽  
Fractional Derivative ◽  
Dynamic Model ◽  
Classical Model ◽  
Viscoelastic Model ◽  
Optical Pickup ◽  
Static Tests ◽  
Wire Suspension ◽  
Suspension Structure ◽  
Sinusoidal Excitation

A novel viscoelastic model of four-wire suspension structure with damping gel in an optical pickup actuator was identified and validated. A two-stage method was developed for the identification of inertia, damping, and spring parameters in the dynamic model. The inertia and spring parameters were identified from static tests. With the identified parameters in the dynamic model, the damping parameters were identified through sinusoidal excitation tests. The accuracy of utilizing fractional derivative to model the damping of polymer damper was validated by carrying out error analysis. The fractional transfer function with voltage input was identified and compared with the transfer function of classical model.

Sign in / Sign up

Export Citation Format

Share Document