Olympus Optical Company, Ltd.

Sony Corporation

Masashi Abe

Shinji Hatta

Takashi Tsukaya

Takeaki Nakamura

Masaaki Hayashi

Yasuhiro Ueda

Syuichi Takayama

Yukihiko Sawada

Shuichi Takayama

Kuniaki Kami

Jun Adachi

Takanao Fujimura

Masanori Hamazaki

Katsutoshi Sato

Kazuya Saiga

Yoshihito Shimizu

Masao Izawa

Hiroyuki Sakakibara

Yoshiro Nishimura

Motoo Aiba

Koichiro Ishiwara

Yoshihisa Taniguchi

Fumihiko Hanzawa

Takahiro Echizenya

Hiroshi Fujimoto

Fukashi Yoshizawa

Taiji Minakawa

Hironobu Aoki

Hiroshi Suzushima

Provided is an objective lens including a diffraction portion provided on a laser beam incident plane or output plane. The diffraction portion includes first second, and third diffraction regions, wherein first laser beams corresponding to a first optical disc having a first transmissive layer are condensed on a data recording portion of the first optical disc, second laser beams corresponding to a second optical disc having a second transmissive layer thicker than the first transmissive layer are condensed on a data recording portion of the second optical disc, and third laser beams corresponding to a third optical disc having a third transmissive layer thicker than the second transmissive layer are condensed on a data recording portion of the third optical disc. An evaluation parameter calculated on the basis of an in-plane efficiency distribution function has a value corresponding to a symbol error rate that is less than a predetermined value.

Objective lens, optical pickup device, and optical disc device

A bending sheath for a probe being inserted in a channel of a forceps of an endoscope inserted in a body cavity of a patient for observing the diseased part thereof is disclosed. The bending sheath comprises a hollow sheath, at least one extended portion extending in the sheath axis direction from the sheath tip portion, and a tip holding member for holding detachably the inserted tip portion of the probe inserted in the sheath.

Bending sheath for probe

An ultrasonic imaging and diagnosing device comprises a section to be inserted into the body cavity, an ultrasonic wave transmitting and receiving section located at the front end of the inserting section, a conductive hollow shaft arranged in the inserting section and connected to the ultrasonic wave transmitting and receiving section, a scanning device for scanning the body cavity while changing the direction of ultrasonic wave transmitted from the ultrasonic wave transmitting and receiving section, a circuit for receiving electric signals applied from the ultrasonic wave transmitting and receiving section, and a signal cable passed through the hollow shaft to connect the ultrasonic wave transmitting and receiving section to the signal receiving circuit. Both of an outer conductive line of the signal cable and the hollow shaft are connected to the common of the signal receiving circuit to prevent noises from entering into the signal cable.

Ultrasonic imaging device with noise preventing structure

In an ultrasonic probe for use in ultrasonic endoscope, ultrasonic diagnosing apparatus and other ultrasonic apparatuses, an ultrasonic vibrator is arranged in a recess formed in a cylindrical housing and is secured thereto such that portions of first and second electrodes are exposed out of the recess. First and second lead wires are embedded in the housing such that tips of the lead wires are exposed within connecting areas formed in the housing in communication with the recess. The tips of the first and second lead wires are connected to first and second electrodes of the ultrasonic vibrator with the aid of conductive members made of solder, conductive paste or conductive adhesive agent. The other end of the first and second lead wires are extended from the same end face of the cylindrical housing.

Ultrasonic probe

A thermotherapeutic apparatus comprises an internal applicator adapted to be inserted into a body cavity of a patient. The internal applicator includes an electrode for warming the tissues of the patient's body with use of an applied voltage, a holding member for holding the electrode, a balloon surrounding the electrode and attached to the holding member, a feed/discharge unit for feeding into and discharging a fluid from the balloon, and a mechanism for situating a radiation source, used in radiotherapy on the body tissues, in the vicinity of the electrode.

Thermotherapeutic apparatus

A hyperthermia apparatus for effecting the thermotherapy by heating a cancer locally including two outside-body electrodes to be arranged on an outer surface of a patient's body, an inside-body electrode to be inserted into a cavity of the patient's body, a high frequency power supply circuit for generating a high frequency power, and a switch connected between the high frequency power supply circuit and the electrodes for selectively supplying the high frequency power to two electrodes so that the cancer can be locally heated to a desired high temperature. At each electrode there are provided balloons through which temperature controlled liquid mediums are circulated to prevent portions of the body near the electrodes from being heated to undesired high temperatures. The liquid mediums circulated through the balloons are electrically isolated from each other completely.

Hyperthermia apparatus

Growing community of inventors

Tokyo, Japan

Masashi Abe