Patents Assigned to Asahi Kogaku Kogyo K.K.
  • Patent number: 5715101
    Abstract: A focusing apparatus for a surveying instrument including an objective lens, a focusing lens and a reticle. The focusing lens is movable in an optical axis direction, by a rotating shaft member which is rotated by a motor, to form an image, of an object to be surveyed, on the reticle. Means for detecting a focus state of the object image and for controlling the motor in accordance with the detected focus state are provided. A focusing knob, coaxial with the rotating shaft member, and movable in an axial direction thereof is also provided. A plurality of clutches disengageably engages the focusing knob or the motor with the rotating shaft member, according to an axial movement of the focusing knob.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: February 3, 1998
    Assignees: Asahi Kogaku Kogyo K.K., Asahi Seimitsu K.K.
    Inventors: Satoru Nakamura, Yasuo Nakamura
  • Patent number: 5537265
    Abstract: An electronic still camera having a first switch for selecting either a field record mode or a frame record mode, and a second switch for selecting either a normal mode or a high-band mode, further includes a control circuit which sets the frame record mode either when the high-band mode is selected by the second switch, or when the high-band mode is selected by the second switch and the field record mode is selected by the first switch, in the latter case optionally switching to the frame record mode only if no recording operation is performed during a predetermined time period.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: July 16, 1996
    Assignee: Asahi Kogaku Kogyo K. K.
    Inventor: Kouichi Sato
  • Patent number: 5426727
    Abstract: A character generation system, in which multiple operations are performed in parallel to achieve higher-speed processing, includes a circuit for converting character contour data into coordinate axis data, a circuit for generating dot data expressive of the contour from the coordinate axis data, a circuit for sorting the coordinate axis data in a prescribed sequence and a circuit for performing image drawing operations in correspondence with the sorted data. At least two of these circuits include sufficient channels to permit the performance of their designated functions in parallel. The required image drawing time is reduced by a decrease in the required number of accesses to a bit map using a polygon approach to character generation.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: June 20, 1995
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Masayuki Sugiura, Masato Maeda
  • Patent number: 5287135
    Abstract: A built-in flash system is disclosed which includes a housing chamber provided in the upper front of a penta-house of a finder optical system, and a casing provided in the housing chamber and having a flashlight emitter arranged so as to be movable between a projecting position where the casing is projected for light emission and a housing position where the casing is housed in said housing chamber, the casing is arranged to be moved between the projecting position and the housing position by a linkage mechanisms disposed at the sides of said built-in flash system.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: February 15, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Akihiro Arai, Tetsuji Shono
  • Patent number: 5281045
    Abstract: A movable member positioning mechanism in which the number of components of lock and click mechanisms is decreased, and the number of assembling steps is decreased accordingly.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: January 25, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Yuichi Ichikawa
  • Patent number: 5281404
    Abstract: A composition for forming a calcium phosphate type setting material comprising(1) powder comprising at least one of .alpha.-tricalcium phosphate and tetracalcium phosphate; and(2) a setting solution comprising an aqueous acidic solution having dissolved therein at least one polysaccharide selected from the group consisting of carboxymethyl chitin, glycol chitin, pullulan, high methoxy-pectin and chitosan in such an amount that the setting solution has a viscosity of 70 cp or more, anda process for producing a calcium phosphate type setting material using such a composition.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: January 25, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Masaya Sumita
  • Patent number: 5282089
    Abstract: The improved zoom lens system includes, in order from the object side, a first lens group having a positive power, a second and a third lens group each having a negative power and a fourth lens group having an overall positive power, the fourth lens group being composed of a first sub-group 4a and a second sub-group 4b, which zoom lens system performs zooming by moving the second lens group relative to the overall system, the third lens group being moved relative to the overall system in operative association with the zooming so as to correct the shifting of the image plane due to the zooming which zoom lens system satisfies specific conditions.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: January 25, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Tetsuya Abe
  • Patent number: 5280390
    Abstract: A zoom lens system includes, in order from the object side, the first lens group having a positive focal length and the second lens group having a negative focal length. The system performs zooming by changing the distance between the first and second lens groups. The first lens group has a negative lens element on the side closest to the object that has a concave surface of large curvature directed towards the image plane and the first lens group satisfies the specific conditions.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: January 18, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Takayuki Ito
  • Patent number: 5277172
    Abstract: A light source control device for an endoscope having a light source for emitting light to be incident on a light guide, a stop mechanism for varying the quantity of light to be incident on the light guide by interrupting an optical path of light, and a control device for controlling an opening of the stop mechanism. The stop mechanism includes a sensing device for sensing the opening of the stop mechanism and outputting a sensing signal to the control device. Further, the stop mechanism includes a shaft and a stop blade rotatably supported on the shaft and being disposed in the optical path such that the quantity of light passing thereby is varied by rotating the blade. The sensing device includes an arc-shaped plate fixed to the shaft and having a radius which varies in proportion to the change in arc angle, and a sensor having an opening for receiving the circumferential edge of the arc-shaped plate to sense the amount of light which passes through the opening.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: January 11, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Hideo Sugimoto
  • Patent number: 5278699
    Abstract: A zoom lens system for a compact camera, having a zoom ratio of approximately 2 or 3 and a smaller overall lens length at the telephoto end than the focal distance at the telephoto end, and which optically experiences only a small focus shift due to environmental changes such as temperature or humidity. The zoom lens system includes a positive lens group and a negative lens group. A positive plastic lens element is disposed in either the positive lens group or the negative lens group. The magnification of the system is adjusted by varying the distance between the positive and negative lens groups. The zoom lens system satisfies the following conditions:0.9<f.sub.t /f.sub.p <1.6 (1)0.6<m.sub.p '-m.sub.p <1.2 (2)2.9<m.sub.MAX <4.0 (3)where f.sub.t is the focal length of the overall system at the telephoto end, f.sub.p is the focal length of the positive plastic lens element, m.sub.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: January 11, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Takayuki Ito, Sachio Hasushita, Shuji Yoneyama
  • Patent number: 5267086
    Abstract: An autofocusable soft focus lens system includes a movable front lens group having a positive power, and a stationary rear lens group having a negative power.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: November 30, 1993
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Hiroyuki Hirano
  • Patent number: D449327
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: October 16, 2001
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Masaaki Haga
  • Patent number: D450337
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: November 13, 2001
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Toshihiro Hamamura
  • Patent number: D453173
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: January 29, 2002
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Masahiro Koinuma
  • Patent number: D341610
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: November 23, 1993
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Akio Takahashi
  • Patent number: D341611
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: November 23, 1993
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Akio Takahashi
  • Patent number: D342753
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: December 28, 1993
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Masaaki Haga
  • Patent number: D342961
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: January 4, 1994
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Toshihiro Hamamura, Takeshi Matsushita
  • Patent number: RE35340
    Abstract: Column packing materials useful in applications such as liquid chromatography, as well as a process for producing such a packing material are described. A first aspect of the invention concerns a column packing material composed of a spherical substrate having a coating of a calcium phosphate based compound on the surface thereof.A second aspect of the invention concerns a packing material comprising porous calcium phosphate based granules having open pores with an average pore size of from 0.01 to 20 .mu.m, said granules being composed of crystalline particles with an average size of from 0.1 to 10 .mu.m.A third aspect of the invention concerns a spherical packing material for liquid chromatography comprising spherical particles of at least one material selected from the group consisting of Ca.sub.10 (PO.sub.4).sub.6 (OH).sub.2, Ca.sub.3 (PO.sub.4).sub.2, Ca.sub.2 P.sub.2 O.sub.7, Ca(PO.sub.3).sub.2, Ca.sub.10 (PO.sub.4).sub.6 F.sub.2 and Ca.sub.10 (PO.sub.4).sub.6 Cl.sub.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: October 1, 1996
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Takeshi Ichitsuka, Tetsuro Ogawa, Katsumi Kawamura, Masaya Sumita, Akihiko Yokoo
  • Patent number: D412005
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: July 13, 1999
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventor: Takeshi Matsushita