Abstract: A scanning device for an apparatus for reading from or writing to optical recording media, with at least one mounting device with a receptacle along an optical axis for an optical component arranged on a cylindrical holder and with setting elements for the holder along the axis or along and about the axis is disclosed. The scanning device of this type reduces the number of setting elements for adjusting an optical component and the setting elements are formed and arranged in a space-saving manner which considerably simplifies the adjusting operation.

Abstract: A photoelement which is provided with a protective layer consisting of cured material and has a transparent element at a location intended for light to pass through. An object of the present invention is to propose an improved photoelement which can be produced at low cost. This is achieved according to the invention by the cured material being the transparent element.

Abstract: A scanning device for an apparatus for reading from or writing to optical recording media, with at least one mounting device with a receptacle along an optical axis for an optical component arranged on a cylindrical holder and with setting elements for the holder along the axis or along and about the axis is disclosed. The scanning device of this type reduces the number of setting elements for adjusting an optical component and the setting elements are formed and arranged in a space-saving manner which considerably simplifies the adjusting operation.

Abstract: The present invention relates to an apparatus for reading from and/or writing to optical recording media having a scanner for scanning the recording medium, a coarse drive for moving the scanner relative to the recording medium and a measuring device for determining the travel of the scanner. The object of the present invention is to propose an apparatus of this type in which it is possible to determine the position of the scanner as exactly as possible, the intention being for this to be ensured even in the event of a high movement speed or acceleration. This is achieved according to the invention by virtue of the fact that the measuring device has an optical interference generating means and an optical interference detection means. The invention is particularly advantageous for apparatuses which require rapid access to extremely diverse locations on the recording medium, as is the case with apparatuses appertaining to optical data storage, for example CD-ROM or DVD-ROM apparatuses.

Abstract: The present invention relates to a photoelement (11) which is provided with a protective layer consisting of cured material and has a transparent element at a location intended for light to pass through.