Principles of Optical Disc Systems, |
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Page 146
... coil . The average dissipated mechanical energy is negligible compared to the electric energy dissipated in the resistance R of the coil . The dissipated power P = le R causes a rise in temperature over the thermal resistance RT between ...
... coil . The average dissipated mechanical energy is negligible compared to the electric energy dissipated in the resistance R of the coil . The dissipated power P = le R causes a rise in temperature over the thermal resistance RT between ...
Page 148
... coil and those with a moving magnet . A moving coil construction has a number of advantages and drawbacks . Besides problems with wire breakage of the supply leads , the moving com- ponent usually has a bad thermal contact with the ...
... coil and those with a moving magnet . A moving coil construction has a number of advantages and drawbacks . Besides problems with wire breakage of the supply leads , the moving com- ponent usually has a bad thermal contact with the ...
Page 152
... coil pairs ( the inner coils cannot be seen on the photograph ) two banana - shaped coils are situated for the radial drive of the objective . 4.6.2 Mechanical transfer Besides the optical position transfer Kopt and the drive transfer ...
... coil pairs ( the inner coils cannot be seen on the photograph ) two banana - shaped coils are situated for the radial drive of the objective . 4.6.2 Mechanical transfer Besides the optical position transfer Kopt and the drive transfer ...
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aberrations AlGaAs amplitude angle applications astigmatic bandwidth beam bits calculated carriage coil Compact Disc cross-talk curves data storage defocusing depth detection detector signal diameter diffracted orders digital audio displacement drive duty cycle effects electronic encoder equation error correction field focus error signal focusing Fourier frequency modulated frequency response geometry grating groove incident intensity intermodulation Laser Vision lens light path light pen loop LV player magnetic master disc maximum method modulation modulation transfer function noise NTSC numerical aperture objective obtained optical contrast optical disc systems optical read-out optical recording parameters Pasman phase difference photoresist pits plane position pregroove reflection rotating scalar scanning spot Schouhamer Immink sequence Signal power signal-to-noise ratio spatial frequency spectrum structure substrate suspension symbols tangential direction track spacing transfer function v₁ vector vertical video disc wave wavelength width wobble