Optical pick-up, optical disk apparatus and information processing apparatus
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Accused Products
Abstract
An optical pick-up capable of reproducing information excellently on both CD and DVD, which are significantly different in terms of three kinds of factors, a base material thickness, a wavelength of a light source, and NA, and detecting TE signals by three kinds of methods, that is, the phase difference method, the PP method, and the 3-beam method, which are necessary to record and reproduce information. The optical pick-up is formed by integrating laser light sources having two kinds of wavelengths (λ1, λ2) for detecting TE signals; photodetectors, and hologram for generating the diffracted light for detecting signals. The distance d1 between the center of the photo detecting portion PD0 and the light emitting spot of the first semiconductor laser light source and a distance d2 between the center of the photo detecting portion PD0 and the light emitting spot of the second semiconductor laser light source substantially satisfy the following relationship:
λ1/λ2=d1/d2.
18 Citations
60 Claims
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1-34. -34. (Cancelled)
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35. An optical disk type recognition method for determining whether an optical disk is present in the optical disk apparatus, and determining whether a disk that is present is CD or DVD, the method comprising:
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by using an optical disk apparatus provided with an optical pick-up using an infrared light source and a red light source, determining whether an optical disk is present by emitting the infrared light source first when the power of the optical disk apparatus is turned on, or when an optical disk is inserted into the apparatus, and determining the kinds of the optical disk by using the reflected light from the optical disk when the optical disk is present. - View Dependent Claims (36, 59, 60)
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37. An information processing apparatus, comprising:
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an optical disk apparatus for recording or reproducing information on an optical disk, or for reproducing and for reproducing information on an optical disk, and an image information read-out means for reading out an image information on a manuscript, wherein the image information read out by the information read-out means can be recorded on the optical disk apparatus. - View Dependent Claims (38)
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- 39. An image projection apparatus, comprising a projecting means for projecting an image onto a front glass of a car.
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42-58. -58. (Cancelled)
Specification