Abstract: Provided is a liquid crystal projector which prevents deterioration of an aluminum grid inorganic polarizing plate due to dusts included in cooling wind for cooling a liquid crystal panel module. A shade member is provided along a surface of the inorganic polarizing plate on which the cooling wind is received, to prevent the surface from being directly receiving the cooling wind and thus prevent attachment of dusts. In order to reduce a cooling effect due to the shade member, 0.9t?a?1.5t and 0.5t?b?1.5t are satisfied, where a represents a width of the shade member, b represents a distance between the shade member and the polarizing plate, and t represents a thickness of the polarizing plate. As a result, it is possible to obtain the cooling effect and the effect of reducing the dusts at the same time.

Abstract: A projection type image display apparatus comprising a light source, an optical integrator, by which light outgoing from the light source is changed in distribution of illumination, a color separation optical system, by which light outgoing from the optical integrator is separated into a plurality of light beams, and a relay optical system including a plurality of relay lenses, by which light beams separated by the color separation optical system are relayed, and a reflection mirror. The relay optical system includes a device that adjusts angles of inclination of at least one of the relay lenses with respect to an optical axis of illumination of light outgoing from the light source.

Abstract: A gear portion meshing with the first step of a pinion gear at the side of a motor, which is a driving unit of optical aperture mechanism, is designed to be a two-gears composition of a gear portion abutting on one side surface of the channel of the pinion gear, and a gear portion abutting on the other side surface of the channel of the pinion gear.

Abstract: A gear portion meshing with the first step of a pinion gear at the side of a motor, which is a driving unit of optical aperture mechanism, is designed to be a two-gears composition of a gear portion abutting on one side surface of the channel of the pinion gear, and a gear portion abutting on the other side surface of the channel of the pinion gear.

Abstract: A projection type image display apparatus comprising a light source, an optical integrator, by which light outgoing from the light source is changed in distribution of illumination, a color separation optical system, by which light outgoing from the optical integrator is separated into a plurality of light beams, and a relay optical system including a plurality of relay lenses, by which light beams separated by the color separation optical system are relayed, and a reflection mirror. The relay optical system includes a device that adjusts angles of inclination of at least one of the relay lenses with respect to an optical axis of illumination of light outgoing from the light source.

Abstract: It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC.

Abstract: It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC.

Abstract: It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC.

Abstract: It is an object to perform a thin and compact design of the objective lens driving device. In order to achieve the above object, optical beam is passed through a space surrounded by a tracking coil and a focusing coil which are adjacent to each other and fixed in a holder. Further, it is another object to position the objective lens with high precision in an objective lens driving device for switching a plurality of objective lenses in accordance with the type of an optical disc. In order to achieve this object, magnetic substances which are radially extended with the sliding shaft at the center are provided in the lens holder, and the magnetic substances are located within a plane perpendicular to the plane constituting the magnetic gap and at the outside of the magnetic gap. Still further, in an objective lens driving device it is another object to prevent the occurrence of positional displacement of the objective lens due to resistance force of current supply means such as FPC.

Abstract: A disk reproducing apparatus comprise a main body of a stock portion in which a plurality of disks are stored in a laminar form, the body being arranged within a casing un-removably from the casing under a normal use state, and a drawer having a disk mount portion on which a single disk is disposed and mounted to the casing in such a manner as to be drawn out from/inserted into the casing of between a first position on an outside of the casing and a second position within the casing under a state where the disk is disposed on the mount portion, so that the disk on the mount of the drawer is delivered to the stock portion.

Abstract: A flange of a tape guide has a guide for guiding tape with its circumference, independently of this an adjusting arrangement is provided on a base supporting the flange to allow varying slant of cylindrical portion of the guide, and the flange is pushed to the base. Slant of an upper flange of the tape guide can be adjusted easily and securely. This will not give excessive ruling force to the tape to prevent the tape edges from being damaged.