摘要:
A constant velocity universal joint of the type having rollers carried by radial trunnions of an inner rotary member and which are received in axial grooves in an outer rotary member, including abutment members which engage abutment surfaces of the grooves and which prevent locking engagement of the rollers with both of the opposed walls of the axial grooves.
摘要:
An image forming apparatus is configured to control the density of an output image based on an inherent gamma characteristic of the apparatus. The apparatus includes a patch image forming unit that forms patch images having multiple gradation values, a measuring unit that measures the density or lightness of each patch image, a sample point arrangement unit that arranges sample points representative of measured density or lightness values in a descending or ascending order of the gradation values, an inflection point region detecting unit that detects any specific inflection point region, a straight line region detecting unit that detects any specific straight line region, an interpolating unit that interpolates by adding and/or deleting a specific sample point depending upon whether (i) an inflection point region is detected, (ii) a straight line region is detected, or (iii) neither an inflection point region nor a straight line region is detected.
摘要:
A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P≦λ/NA, wherein P is a pitch of the convex shaped section, λ is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system. A reproducing apparatus is particularly suited for the recording medium.
摘要:
A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P≦λ/NA, wherein P is a pitch of the convex shaped section, λ is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system. A reproducing apparatus is particularly suited for the recording medium.
摘要:
An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.
摘要:
A recording medium includes a substrate having a microscopic pattern, which includes a shape of continuous substance of approximately parallel grooves formed with a convex shaped section and a concave shaped section alternating on a surface of the substrate. A recording layer is formed on the microscopic pattern and a light transmitting layer has a thickness of 0.05 mm to 0.12 mm formed on the recording layer. The microscopic pattern satisfies a relation of P≦λ/NA, wherein P is a pitch of the convex shaped section, λ is a wavelength of a reproducing light beam and NA is a numerical aperture of an objective lens. The microscopic pattern also includes modulated address information formed on both side walls of the convex shaped section viewed from the light transmitting layer as a wobble, both the side walls being parallel to each other, and furthermore wherein the address information is modulated by the phase-shift keying modulation system. A reproducing apparatus is particularly suited for the recording medium.
摘要:
An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.
摘要:
A novel optodynamic method and apparatus for the manufacture of an optical record medium of the type having a multiplicity of pits or like optically detectable marks representative of digitized information to be reproduced wherein a stamper is provided which is of quartz glass or like material that transmits ultraviolet radiation and which has a stamping surface shaped as a negative of the optically detectable marks to be created, the stamping surface is pressed against a blank sheet of polycarbonate or like plastic that absorbs ultraviolet radiation the surfaces of blank sheet is irradiated with ultraviolet light through the stamper whereby the surface of the blank sheet gels, or softens, to permit the optically detectable marks to be impressed thereon. The stamping may be dome in a partial vacuum in order to assure closer contact between the stamper and the blank sheet.
摘要:
A recording medium of electrostatic capacitance type is recorded with an information signal thereon as variation of geometrical shape of the recording surface part of the recording medium. The signal is reproduced from the recording medium by the variation, in response to the variation of geometrical shape, of the electrostatic capacitance between an electrode of a reproducing stylus tracing relatively the recording surface of the medium and the surface part. At least the surface part of the recording medium having the geometric shape variation is formed by a synthetic resin into which an electroconductive material has been admixed. The synthetic resin forms an outer surface cover of the surface part of the medium thereby to prevent exposure of the electroconductive material to the outside.
摘要:
Provided is an image forming apparatus including a reference image generating unit and a toner usage evaluation unit. The reference image generating unit is configured to convert a subject image into a reference image having a data amount smaller than the subject image. The toner usage evaluation unit is configured to obtain a usage of toner for printing the subject image based on the reference image.