Disc-shaped recording medium inspection apparatus and method
AssigneeSony Corporation
InventorsShigeo Kubota, Naoya Eguchi, Yutaka Imai
Life of this patent
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Abstract
To inspect a disc-shaped recording medium accurately, promptly and nondestructively, a laser light emitted from a laser generator 4 is irradiated through an optical fiber 8, a rotatable diffusion plate 10 and an objective lens 13 to the surface of a disc 2. A solid-state image sensing device 15 detects a return component of the light, reflected from the surface of the disc 2. A processor 6 processes the output image from the solid-state image sensing device 15 to inspect the configuration of the signal recording surface of the disc 2.
Claims20
A disc-shaped recording medium inspection apparatus for inspecting a configuration of a signal recording surface of a disc-shaped recording medium, the apparatus comprising:
- an imaging means for emitting a light having a wavelength falling within a predetermined range to irradiate the signal recording surface, for detecting a return component of the light as reflected from the signal recording surface, and for outputting an output image, wherein the predetermined range of the light wavelength is 200 nm to 300 nm;
- means for processing the output image from the imaging means to form a result;
- and
- means for inspecting the configuration of the signal recording surface based on the result of the output image processing by the means for processing.
A method of inspecting a configuration of a signal recording surface of a disc-shaped recording medium, the method comprising the steps of:
- emitting a light having a wavelength falling within a predetermined range to irradiate the signal recording surface, wherein the predetermined range of the light wavelength is 200 nm to 300 nm;
- detecting a return component of the light as reflected from the signal recording surface to form an image;
- outputting the image as an output image;
- processing the output image to form a result;
- and
- inspecting the configuration of the signal recording surface as a function of the result of the processing obtained at the processing step.
Dependencies are inferred from the claim text.