Abstract: A surface texture measuring apparatus allowing effects of vibration disturbance to be removed and a highly accurate measurement to be achieved. The surface texture measuring apparatus is further provided with a small surface texture measuring apparatus, which detects the amount of vibration of a workpiece while maintaining a detecting device in contact with the surface of the workpiece without moving the device along the workpiece. The main surface texture measuring apparatus conducts measurement with a high accuracy based on the detected unevenness value of the surface of the workpiece and on the amount of vibration detected by the small surface texture measuring apparatus.

Abstract: A composite optical component and its manufacturing method are disclosed. A holding member or an optical functional device is subjected to elastic deformation, with both of them fixed together, and the optical functional device is subjected to plastic deformation by heating to reduce stress between two components in such a way that the holding member and optical functional device will be slide-fitted with each other; sliding resistance between the optical functional device and enclosure per “b” in longitudinal direction of the optical component will be F≦a/b×S×E; or the optical functional device and holding member will be slide-fit by formation of one integral body in the mold, thereby preventing thermal distortion and distortion of the optical functional device due to recovery of elastic deformation of a reinforcing member, with the result that manufacturing costs can be reduced while a high degree of straightness and high surface precision are maintained.

Abstract: A surface texture measuring apparatus that ensures detection of surface texture of a workpiece even when the surface has a steep unevenness. A detecting device having a stylus is moved in the X axis direction along the surface of the workpiece, and displacement in the Z axis direction is converted into electric signals to detect unevenness of the surface of the workpiece. When the surface has a steep unevenness and the amount of displacement in the Z axis direction reaches or exceeds a threshold, a Z axis detected value and an X axis detected value obtained at that moment are output. The moving speed of the detecting device is decreased when the surface has a steep unevenness, while the moving speed is increased when the surface does not have a steep unevenness, making it possible to improve following characteristics and to reduce measurement time.

Abstract: A plastic molding for use in an optical device, a method of producing the molding by injection molding, and an apparatus for practicing the method are disclosed. Only a part of a molding expected to sink is surely caused to sink while, e.g., a mirror surface is surely transferred to a desired part of the molding.

Abstract: A plastic molding for use in an optical device, a method of producing the molding by injection molding, and an apparatus for practicing the method are disclosed. Only a part of a molding expected to sink is surely caused to sink while, e.g., a mirror surface is surely transferred to a desired part of the molding.

Abstract: A plastic molding for use in an optical device, a method of producing the molding by injection molding, and an apparatus for practicing the method are disclosed. Only a part of a molding expected to sink is surely caused to sink while, e.g., a mirror surface is surely transferred to a desired part of the molding.

Abstract: A plastic molding for use in an optical device, a method of producing the molding by injection molding, and an apparatus for practicing the method are disclosed. Only a part of a molding expected to sink is surely caused to sink while, e.g., a mirror surface is surely transferred to a desired part of the molding.

Abstract: An imaging device includes a first focusing element on which rays from an object are incident, a second focusing element from which the rays are emitted toward an imaging surface, and a roof mirror having surfaces which are connected to each other at an angle of 90.degree. so that a ridge line is formed, the roof mirror being arranged so that the ridge line intersects optical axes of the first focusing element and the second focusing element at a position on a plane including the optical axes.

Abstract: A transfer sheet detect sensor for detecting the presence or absence of a transfer sheet is disposed between a point of contact where a developing device for developing an electrostatic latent image formed on an image carrier to form a toner image is contacted with a transfer roller in a transfer portion and a point of tucking provided just upstream of the contact point where the transfer sheet is tucked into the image carrier just upstream of the contact point, the transfer roller is disposed such that it can be contacted with and retreated (separated) from the image carrier, and a cleaning roller is provided such that it can be contacted with the transfer roller while the transfer roller is retreated to its separated position, whereby a given cleaning voltage is applied to the transfer roller when the transfer roller is cleaned by the cleaning roller.

Abstract: In an aging device used to manufacture a plastic molded product, injecting and aging processes are separated from each other. Namely, a plastic base material is approximately processed in advance in a final shape by injection molding. Thereafter, the plastic base material is inserted into an aging die having plural cavities and attached to a press machine such that the aging die is clamped and opened. Next, the plastic base material is heated and melted until a temperature equal to or higher than a glass transition point so as to generate an internal resin pressure. Next, the plastic base material is gradually cooled to transfer a mirror face thereto. The aging device has a die cooling device having plural heat pipes for cooling the die and has a die heating device having plural heaters for heating the die. The heat pipes and the heaters are arranged in a die plate of the press machine.