Method for measuring displacement gain value between light storage device and driving voltage and apparatus therefor

Abstract

A method for an optical storage device comprising a read head comprising an objective lens, a first light source and a second light source, the objective lens focusing the first light source on A first focus point or the second light source is focused on a second focus point, the first focus point and the second focus point are separated by a predetermined distance, a driving voltage can change the position of the objective lens, the method includes (a) providing the driving voltage to change the position of the objective lens; (b) measuring a first parameter when the first focus point passes through a preset layer in an optical disc; (c) measuring when the second focus A second parameter when the point passes through the preset layer in the optical disc; and (d) determine the difference between the position difference of the objective lens and the driving voltage according to the preset distance, the first parameter, and the second parameter the relative relationship.

Description

technical field [0001] The present invention relates to an optical storage device, in particular to a method and a related device for determining the relative relationship between the position difference of the objective lens and the driving voltage in the optical storage device. Background technique [0002] An optical storage device (optical storage device) is a common storage medium in today's computer systems. see figure 1 , figure 1 It is a simple block diagram of an optical storage device 100 in the prior art. The optical storage device 100 includes a spindle motor 110, an optical disc 120, a pickup 130, a signal processing unit 140, a focusing controller 150, A microcontroller unit (MCU) 160 and a power driver (power driver) 170 . The optical disc 120 may be a CD or DVD type optical disc, which may comprise at least two layers: a surface layer and a reflective layer. The junction layer between the protective material and the metal surface (used to record informat...

AI Technical Summary

Problems solved by technology

However, due to the fact that in the process of producing optical storage devices, it is impossible to make every optical storage device manufactured have the same shift gain value (partially due to the small difference in the focus actuator), in each optical storage device When the device has different shift gain values, it is unwise to use a fixed shift gain value as the reference data for controlling each optical storage device, and the control action of the focus actuator on the position of the objective lens will also change accordingly. inaccurate

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