An optical apparatus capable of generating adaptive control signals
An adaptive control and optical device technology, applied in the configuration/installation of the head, optical recording/reproduction, information storage, etc., to achieve the effect of reducing demand and efficient surface defect treatment
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[0039] Figure 1 shows an optical device and an optical information carrier 1 according to the invention. The carrier 1 is fixed and rotated by holding means 30 .
[0040] The carrier 1 comprises a material suitable for recording information by means of a radiation beam 5 . The recording material can be eg magneto-optical, phase change, dye, metal alloys like copper / silicon or any other suitable material. Information can be recorded on the carrier 1 in the form of optically detectable areas, also called marks for rewritable media and pits for write-once media.
[0041] The device comprises an optical head 20, sometimes referred to as an optical pick-up (OPU), which is displaceable by an actuating means 21, such as a stepper motor. The optical head 20 includes a photodetection system 10 , a radiation source 4 , a beam splitter 6 , an objective lens 7 and a lens shifting device 9 . The optical head 20 may also comprise a beam splitting device 22, such as a grating or a hologra...
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