Olympus Optical Company, Ltd.

Tdk Corporation

Kunio Ohno

Yoshio Tashiro

Nobuaki Akui

Masahiro Kawashima

Koji Kambara

Susumu Takahashi

Kimihiko Nishioka

Yoshihiko Minachi

Nobuo Yamashita

Akihiro Namba

Toshimasa Akagi

Tsuruo Hatori

Junichi Nagaoka

Nobuhiko Washizuka

Takashi Mizusaki

Shigeki Yanagida

Masaru Iino

Syunsuke Kurasawa

The present invention provides a ferrite magnet material comprising, as a main phase, a ferrite having a hexagonal structure, the main phase containing A, La, R, Fe and Co, wherein A is at least one element selected from Sr, Ba and Pb, R is Pr and/or Nd, and the proportions of the total metal elements A, La, R, Fe and Co in the main phase are respectively A: 1 to 13 atomic %, La: 0.003 to 10 atomic %, R: 0 to 10 atomic % (excluding 0) Fe: 80 to 95 atomic % and Co: 0.05 to 5 atomic % based on the total amounts of metal elements. The residual magnetic flux density Br and coercive force HcJ can be improved without increasing the content of Co by incorporating Pr and/or Nd along with La and Co in the ferrite magnet material.

Ferrite magnetic material and process for producing the same

A treating instrument for use with an endoscope, which has a flexible sheath and an opening at the distal end portion of the sheath. A treating element having directionality is accommodated slidably in the sheath. This treating element is capable of extending through the opening of the sheath to reach the part to be treated from specific directions. An elongated member is connected at one end portion to the proximal end portion of the treating element and inserted slidably in the sheath. Operating member for moving forward and backward and rotating the treating element is attached to the other end portion of the elongated member and is arranged at the rear of the proximal end portion of the sheath. This treating instrument is provided with stopping member for limiting the rotating angle of the treating element when the treating element is rotated by means of the operating member.

Treating instrument for use with an endoscope

In an insertion section of an endoscope according to the present invention, a plurality of flexible segment tubes, each having a predetermined length and a predetermined inside diameter, constitute necessary ducts for the endoscope, individually. The ducts include an image guide duct, light guide duct, instrument channel duct, and air/water channel duct. The flexible segment tubes are fixed in a housing tube. In manufacturing the insertion section, optical fibers and the like are inserted into the flexible tubes, fixed in the housing tube. Once the housing tube is molded, the respective sectional configurations of the flexible tubes are kept uniform, even though the housing tube may contract. Thus, the optical fibers and other elements can be inserted easily into the ducts.

Insertion section of an endoscope

An endoscope includes an operation section and an insertion section extending from the operation section. The insertion section has a plurality of insertion holes extending in its axial direction. The insertion holes have outlet openings open to the distal end portion of the insertion section and inlet openings open to the proximal end portion of the insertion section. One of the inlet openings is open to the proximal end face of the insertion section, and the remaining openings are open to the outer periphery of the insertion section. An image guide and a light guide inserted into the insertion holes extend from the inlet openings located at the outer periphery of the insertion section toward the outside thereof.

Endoscope with insertion having a plurality of insertion holes

An apparatus for picking-up an image of an object including a solid state image sensor having a number of image sensing elements and an objective lens for projecting the image of the object onto the image sensor is disclosed. In order to remove a curvature of field of the objective lens, the image sensor is curved into a spherical shape having a radius of curvature equal to that of the curvature of field. The solid state image sensor may be curved in any desired shape to correct various aberrations of the objective lens.

Image pick-up apparatus

An electrostatic coupling means is provided between a camera and an eyepiece section of an endoscope, and a second electrostatic coupling means is provided between a connector section of said endoscope and a light source unit. A high frequency signal of a high frequency generator provided in the camera is received by a receiving circuit in the light source unit through the electrostatic coupling means, and control of the light emission of the light source is made on the basis of the received signal.

Photographing apparatus for endoscope

Growing community of inventors

Tokyo, Japan

Kunio Ohno