Method of gain adjusting in order to form the lens position signal and reading from the optical record medium which corresponds to that and/or entry instrument tool to optical record medium

摘要

Topic The lens position signal, in order to be able to hold down the tracking error component as much as possible, adjusting weight factor, method and the instrument which can be formed.SolutionsThe lens and lens position signal LCE which shows the difference with position during the geometric hitting is necessary for the rough tracking of optical memory drive. Until recently with technology, the one for lens position signal LCE weight from the principal beam and the secondary beam it is formed with three beam pickups by the combination of the signal of the photodetector of the specification which is attached. The only method of making that it is not the crosstalk which is pulled up by the tracking error signal secure is the weight attaching wound accurately to be set in the lens position signal. The weight attaching wound be able to adjust this invention, automatically, and the method where it can conform to the feature of the pickup and the respective memory medium is stated. Amplitude of these components in the signal of principal and the secondary beam which are influenced by the tracking error signal is measured, is decided from those and by the weight attaching wound connection section appraisal which conforms. Synchronous inspection and the appraisal which uses time integral calculus can be stated, can use the several during entry and reading. Selective figure Figure 6A