Abstract: A laser module, includes: an optical fiber; n laser diodes LDi (i=1, 2, . . . , n) arranged in an order corresponding to a descending order of optical path lengths LOi of optical paths respectively extending from the laser diodes LDi to the optical fiber; and n collimating lenses SLi respectively disposed in the optical paths to be distant from the respective laser diodes LDi and from the optical fiber. When a distance from each of the laser diodes LDi to a corresponding one of the collimating lenses SLi is defined as a collimation length LCi, at least one of a collimation length LC1 and a collimation length LCn differs from a certain distance SL that is set with respect to each of the collimating lenses SLi.

Abstract: A laser module, includes: an optical fiber; n laser diodes LDi (i=1, 2, . . . , n) arranged in an order corresponding to a descending order of optical path lengths LOi of optical paths respectively extending from the laser diodes LDi to the optical fiber; and n collimating lenses SLi respectively disposed in the optical paths to be distant from the respective laser diodes LDi and from the optical fiber. When a distance from each of the laser diodes LDi to a corresponding one of the collimating lenses SLi is defined as a collimation length LCi, at least one of a collimation length LC1 and a collimation length LCn differs from a certain distance SL that is set with respect to each of the collimating lenses SLi.

Abstract: A projection display device includes: an aperture part which narrows light traveling toward an imager; a control part which controls the aperture part; a detection part which detects brightness of an image to be projected; and a determination part which determines whether the image is a still image or a moving image. In this arrangement, the control part operates the aperture part so as to narrow the light when the brightness of the image detected by the detection part is darker than predetermined brightness, and operates the aperture part so as to further narrow the light when the brightness of the image detected by the detection part becomes darker than the predetermined brightness. In addition, the control part sets the predetermined brightness for operating the aperture part so as to be darker when the image is the still image than when the image is the moving image.

Abstract: A projection display device includes: an aperture part which narrows light traveling toward an imager; a control part which controls the aperture part; a detection part which detects brightness of an image to be projected; and a determination part which determines whether the image is a still image or a moving image. In this arrangement, the control part operates the aperture part so as to narrow the light when the brightness of the image detected by the detection part is darker than predetermined brightness, and operates the aperture part so as to further narrow the light when the brightness of the image detected by the detection part becomes darker than the predetermined brightness. In addition, the control part sets the predetermined brightness for operating the aperture part so as to be darker when the image is the still image than when the image is the moving image.

Abstract: An LCD projector has LCD panels, each including polarization plates one on the light incidence side and another on the light emitting side of each LCD panel. The LCD panel is provided with a highly transparent auxiliary polarization plate between the LCD panel and the polarization plate on the light emitting side. The LCD panel is further provided with an optically anisotropic transparent substrate for supporting the highly transparent auxiliary polarization plate. The transparent substrate is arranged such that one of its anisotropic optical axes is inclined at an angle not more than 0.5 degrees with respect to the face of the auxiliary polarization plate when the face is parallel to the direction of light propagation. This arrangement ensures longer lives of the polarization plates on the light emitting sides while suppressing color irregularity on a black screen and degradation of picture contrast of the LCD projector.

Abstract: An LCD projector has LCD panels, each including polarization plates one on the light incidence side and another on the light emitting side of each LCD panel. The LCD panel is provided with a highly transparent auxiliary polarization plate between the LCD panel and the polarization plate on the light emitting side. The LCD panel is further provided with an optically anisotropic transparent substrate for supporting the highly transparent auxiliary polarization plate. The transparent substrate is arranged such that one of its anisotropic optical axes is inclined at an angle not more than 0.5 degrees with respect to the face of the auxiliary polarization plate when the face is parallel to the direction of light propagation. This arrangement ensures longer lives of the polarization plates on the light emitting sides while suppressing color irregularity on a black screen and degradation of picture contrast of the LCD projector.

Abstract: In order to use plain paper without increasing the total size of the apparatus, the facsimile apparatus in the present invention houses hand scanner 300 in scanner section 3 which is provided at the front of facsimile apparatus main unit 1 via support 305 with the scanning side facing upward.

Abstract: The ink film unit is configured by fixing the fixed shaft that penetrates the inside of the hollow, cylindrical feeding reel, right side plate and left side plate and attaching the winding reel to the right side plate and left side plate in a pivotable manner. The main unit is provided with the grooves that house and position the right side plate and left side plate, and the U-figured holders that hold the feeding reel and winding reel. This makes it possible to reduce the space for installation of the ink film unit, reducing the size of the facsimile apparatus.

Abstract: A facsimile machine includes a main body having a facsimile unit. A document roller that feeds a document is provided in the main body. A sheet feed roller that feeds a recording paper is also provided in the main body. The document roller and the sheet feed roller have a substantially identical shape and are made of a substantially identical material. The document roller and the sheet feed roller have a first side surface and a second side surface opposite to the first side surface. The first side surface has a hole configured to be engaged with a shaft that transmits a drive force and the second side surface has an engaging piece configured to be engaged with a one-way clutch.

Abstract: In the ultrasonic motor according to the present invention, a carbon fiber reinforced plastic whose carbon fibers are arranged in one direction is used for a friction member applied to a sliding surface of a stator or rotor; Vickers hardness is Hv550 or more; and a sliding surface of the rotor or stator in sliding relationship with the friction member has surface roughness of Ra=0.03 .mu.m or less.

Abstract: A facsimile includes a body cover, a U-turn feed unit contained in the body cover and having a turnabout roller for changing an original-sheet feed direction, a reading sensor contained in the body cover to read an image on an original sheet transported in the U-turn feed unit, and an image recording unit contained in the body cover to record an image on a recording sheet. The reading sensor is situated at a position within a space surrounded by a U-turn feed path in the U-turn feed unit such that the reading sensor cannot interfere with the turnabout roller.

Abstract: An optical image sensor has a body case on which an elongate image sensing window is formed, a linear lamp disposed in the case so as to be parallel to the window, and an optically image snesing unit disposed in the case. The unit optically senses the image on a document moving on the case across the window by utilizing the reflection of light emitted from the lamp when the image passes over the window. The linear lamp is so disposed in the case that the center in the longitudinal direction thereof is not brought into coincidence with the center of the window, and a portion of the case, corresponding to the one end of the lamp which is further away from the center of the window, is constructed as a pair of article holding recesses.