Abstract: An optical transmission system including an optical transmission device and an optical reception device that receives, via an optical transmission line, a signal transmitted from the optical transmission device, the optical transmission system including a transmission-mode selection unit that selects transmission mode information in descending order of priority out of transmission mode information, which is combinations of a plurality of parameters concerning transmission performance, the transmission mode information being a plurality of kinds of the transmission mode information common to the transmission performance of the optical transmission device and the optical reception device, a signal transmission unit that transmits, to the optical reception device, a signal modulated based on the selected transmission mode information, and a signal reception unit that receives the signal and modulates the received signal based on the transmission mode information selected by the transmission-mode selection unit.

Abstract: A pattern writing apparatus for writing a pattern on a photosensitive material comprises a head provided with a DMD having a micromirror group which spatially modulates reflected light. Light from the micromirrors of the DMD are directed to irradiation regions (61) on the substrate, respectively. The irradiation regions (61) are moved over the substrate with movement of the substrate relative to the head. The DMD is provided within the head so that the direction of arrangement of the irradiation regions (61) is tilted relative to the main scanning direction, and a center-to-center distance (L1) along the sub-scanning direction between two adjacent irradiation regions (61) arranged in the main scanning direction is made equal to a pitch (P1) of writing cells (620) on the substrate with respect to the sub-scanning direction. ON/OFF control of light irradiation of each irradiation region is performed each time the irradiation regions 61 move a distance equal to twice a pitch (P2).

Abstract: An image recording apparatus (1) has a stage unit (2) for holding a substrate (9), an irradiation unit (4) having a plurality of irradiation parts (40) and a mechanism for relatively moving the stage unit (2) and the irradiation unit (4). An irradiation part (40) is provided with a DMD having a group of micromirrors for modulating a reflected light beam and a micro moving mechanism for moving the DMD relatively to the irradiation unit (4) in the X direction, thereby microscopically moving an irradiation position of the irradiation part (40) in the X direction. The irradiation part (40) is further provided with a zoom lens, thereby magnifying and reducing an image of the DMD on the substrate (9). By controlling a plurality of irradiation parts (40) parallelly and independently, the image recording apparatus (1) can write a fine pattern at high speed.

Abstract: A pattern writing apparatus for writing a pattern on a photosensitive material comprises a head provided with a DMD having a micromirror group which spatially modulates reflected light. Light from the micromirrors of the DMD are directed to irradiation regions (61) on the substrate, respectively. The irradiation regions (61) are moved over the substrate with movement of the substrate relative to the head. The DMD is provided within the head so that the direction of arrangement of the irradiation regions (61) is tilted relative to the main scanning direction, and a center-to-center distance (L1) along the sub-scanning direction between two adjacent irradiation regions (61) arranged in the main scanning direction is made equal to a pitch (P1) of writing cells (620) on the substrate with respect to the sub-scanning direction. ON/OFF control of light irradiation of each irradiation region is performed each time the irradiation regions 61 move a distance equal to twice a pitch (P2).

Abstract: A laser drawing apparatus according to the invention calibrates the accuracy of a first light quantity monitor in detecting the quantities of laser beams, based on results of detection by a second light quantity monitor of the quantities of laser beams emitted from an imaging optical system to a drawing stage, when a characteristic deterioration of or adhesion of foreign matter to optical components of the first light quantity monitor has resulted in variations in the optical characteristic of the first light quantity monitor, and variations in the detection by the first light quantity monitor of the quantities of the laser beams. The quantities of the laser beams emitted to a printed circuit board (image-receiving object) is thereby adjusted to a proper value, to maintain high-quality, high-definition drawings requiring a high degree of light quantity precision.

Abstract: An image recording apparatus (1) has a stage unit (2) for holding a substrate (9), an irradiation unit (4) having a plurality of irradiation parts (40) and a mechanism for relatively moving the stage unit (2) and the irradiation unit (4). An irradiation part (40) is provided with a DMD having a group of micromirrors for modulating a reflected light beam and a micro moving mechanism for moving the DMD relatively to the irradiation unit (4) in the X direction, thereby microscopically moving an irradiation position of the irradiation part (40) in the X direction. The irradiation part (40) is further provided with a zoom lens, thereby magnifying and reducing an image of the DMD on the substrate (9). By controlling a plurality of irradiation parts (40) parallelly and independently, the image recording apparatus (1) can write a fine pattern at high speed.

Abstract: A pattern writing apparatus for writing a pattern on a photosensitive material comprises a head provided with a DMD having a micromirror group which modulates reflected light, a stage holding a substrate, and mechanisms for moving the head and the stage relative to each other. Light from the micromirrors of the DMD are directed to irradiation regions (61) on the substrate, respectively. The irradiation regions (61) are moved over the substrate with movement of the substrate relative to the head. The DMD is provided within the head so that the direction of arrangement of the irradiation regions (61) is tilted relative to the main scanning direction, and a center-to-center distance (L1) along the sub-scanning direction between two adjacent irradiation regions (61) arranged in the main scanning direction is made equal to a pitch (P1) of writing cells (620) on the substrate with respect to the sub-scanning direction.

Abstract: A laser drawing apparatus according to the invention calibrates the accuracy of a first light quantity monitor in detecting the quantities of laser beams, based on results of detection by a second light quantity monitor of the quantities of laser beams emitted from an imaging optical system to a drawing stage, when a characteristic deterioration of or adhesion of foreign matter to optical components of the first light quantity monitor has resulted in variations in the optical characteristic of the first light quantity monitor, and variations in the detection by the first light quantity monitor of the quantities of the laser beams. The quantities of the laser beams emitted to a printed circuit board (image-receiving object) is thereby adjusted to a proper value, to maintain high-quality, high-definition drawings requiring a high degree of light quantity precision.

Abstract: A head lining of an automobile is formed with a notched portion which is surrounded by a forward corresponding portion of the head lining to be brought into contact with a front surface of a pillar, and a backward corresponding portion of the head lining to be brought into contact with a rear surface of the pillar. The head lining is further formed with first slits on the head lining so that the forward corresponding portion and backward corresponding portion are brought into contact with the front surface and rear surface of the pillar in such a manner that the forward corresponding portion and backward corresponding portion are curved downwardly. The forward corresponding portion and backward corresponding portion are formed so as to be extended from a position where they are brought into contact with the front surface and rear surface of the pillar.

Abstract: A piercing apparatus for forming partially overlapped small holes in upper and lower layers of lining material includes upper and lower piercing stands having piercing members affixed thereto respectively. The upper and lower piercing members have engaging cut-out portions corresponding to a shape of the overlap desired between the holes. When holes are formed for a first layer of lining material, the material is positioned between upper and lower stands mounting the piecing members and the lower piercing member is driven up to cut-out the shape of the opening for the first layer except for the overlap area. Then as the lower piercing member is driven up further, the leading edge of its cut-out portion engages the trailing edge of the corresponding cut-out portion of the upper piercing member. At this time the shape of the overlap portion is cut from the first layer of lining material.

Abstract: A reversible-lid arrangement for a motor vehicle includes a floor panel having an opening, a lid member, and a pair of oppositely-arranged guide rails. The lid member is so sized as to close the opening, and has first and second side surfaces which are opposed to each other. The lid member has first and second projections which are formed on the first side surface and spaced away from each other with a certain predetermined distance therebetween, and third and fourth projections which are formed on the second side surface and spaced away from each other with the predetermined distance therebetween. The guide rails are so sized and spaced away from each other as to fit therein the first, second, third and fourth projections of the lid member.

Abstract: A door installation arrangement adapted to widely open a door of an automotive vehicle. The door installation arrangement is comprised of a double hinge member which has a first end section hingedly connected to a door body side, and a second end section hingedly connected to a vehicle body side. A hinge trim is disposed separate from the double hinge member to decoratively cover the double hinge member. The hinge trim is hingedly connected at its front end within the vehicle body side through a sub-double hinge member and at its rear end with a door trim through a hinge member.

Abstract: An optical beam scanning system for scanning photosensitive material (1) comprises a laser (201), a beam splitter (204) for producing multibeams (LB.sub.a, LB.sub.b), AOM's (207a, 207b), a multibeam adjuster (300) for turning the multibeams to intersect each other at a prescribed point (P.sub.C), a horizontal expander (211), an AOD (213), a vertical expander (214), a deflection direction adjuster (400) for rotating a deflection direction of the multibeams, and a variable focusing mechanism (500) comprising a plurality of object lenses (501-504). A pixel pitch and a spot diameter on the photosensitive material can be changed separately from each other by exchanging the object lenses and by adjusting an angle of intersection of multibeams (B.sub.a, B.sub.b) by means of the multibeam adjuster. Cylindrical lenses of the horizontal and vertical expanders are so positioned that they compensate a cylindrical lensing effect of the AOD.

Abstract: An A-phase pulse (S.sub.A) and a B-phase pulse (S.sub.B) are transmitted from a laser interferometic measuring device to a conversion device (5). When the distance-to-be-measured (l) is increasing, a conversion coefficient (D.sub.R) is added to or subtracted from an initial value in an arithmetic calculator (53) at the rising edge and the trailing edge of the pulses (S.sub.A, S.sub.B). The conversion coefficient has a digital value of M-digits and represents a reference distance .lambda./N, where .lambda. is the wavelength of a laser beam (LB.sub.1, LB.sub.2) employed in the laser measuring machine and M and N are positive integers. A predetermined unit distance in the metric system corresponds to a unit number in the (M+1)-th digit. A distance pulse signal (S.sub.L) is generated in response to a carry signal and a borrow signal from the arithmetic calculator, and is used in expressing a change of the distance in the metric system.

Abstract: An AOD driver (27) generates a driving signal of an AOD (11), whose frequency varies in response to a sweep signal and whose amplitude varies in accordance with an amplitude control signal. In an initial stage, a constant signal level is stored in a memory (29) and is supplied to the AOD driver. A laser beam is deflected by the AOD and the light intensity thereof is detected by a photo-sensor (14). A signal representing the light intensity is given to a CPU (33) and a corrected amplitude control signal is generated, which is stored in the memory in place of the original amplitude control signal to control the AOD driver.

Abstract: An image data processing apparatus for generating a dot data, which is converted from a runlength data, to control multi-channel exposure beams which record image patterns through scanning, having a converter for generating a dot signal which corresponds to a length of an exposure portion designated by the runlength data, and a memory block for forming the dot data by storing the dot signals in M scanning lines, where M is the number of the exposure beams. Then it generates the dot data which corresponds to the number of the exposure beams.

Abstract: In a motor vehicle having a sun roof construction wherein a guide rail for a sun roof lid extends along a sun roof opening and is secured to a fixed member of the vehicle, there is arranged a ceiling structure. The ceiling structure comprises a ceiling board having an opening which faces the sun roof opening, the ceiling board opening being thus bounded by a peripheral edge portion of the ceiling board; a flange portion integrally connected to the guide rail and having a plurality of cuts; a plurality of hook members fixed to the peripheral edge portion, each hook member having a pawl; and an elongate retainer having an engaging foot portion, wherein the hook members are passed through the cuts of the flange portion and projected outward from the flange portion, and the retainer is placed on the flange portion having the engaging foot portion engaged with the pawls of the hook members.

Abstract: An apparatus for recording a binary image of a printed circuit pattern on photosensitive material. First and second rows of recording spots scan the photosensitive material. The second row is shifted by a length corresponding to approximately half the diameter of the recording spots. Each of the recording spots covers an area equal to approximaqtely four pixels. Whether a pixel is to be exposed is determined on the basis of a logical sum or product of data corresponding to four adjacent pixels.

Abstract: A luggage carpet laid over a luggage room floor of a motor vehicle and rear surface of a seat back of a seat located adjacent to the luggage room. The portions of the carpet located at a region extending substantially along and in the vicinity of a boundary between the seat back and the luggage room floor have respective surface areas disposed in opposition to each other on a same surface of the carpet, said portions being joined together at respective ends in said opposite surface areas to form at least a hinge.

Abstract: A welt made of resins and U-shaped in section to be fitted onto rims of attached members, characterized in that a pair of engaging pieces made integral to the welt at their outer substantially center portions extend expanding outward from inside the U-shaped portion and from both opened opposite rims of the welt, and that the rim portion of an attached member is forcedly inserted into the welt through those clearances which are between front and back ends of the engaging pieces.