Optical disc reading head utilizing super-resolution phase plate
A phase plate and super-resolution technology, applied in the direction of optical recording head, beam guiding device, etc., can solve the problems of reading signal crosstalk, high first side lobe intensity, etc., and achieve the effect of avoiding signal interference
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[0026] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.
[0027] Please refer to FIG. 1 first. FIG. 1 is a schematic structural diagram of an optical disc pickup head using a super-resolution phase plate according to the present invention. As can be seen from the figure, the present invention adopts the structure of the optical disc pickup head of the super-resolution phase plate, including a semiconductor laser 1, a collimating lens 2, a beam splitter 3, The reading and writing objective lens 5, on the reflection optical path of the described beam splitter 3, are focusing lens 7 and photodetector 8 successively, it is characterized in that between the described beam splitter 3 and the reading and writing objective lens 5 and close to the reading The writing objective lens 5 places the super-resolution phase plate 4.
[0028] The...
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