National Institute of Information and Communications Technology, Incorporated

Megaopto Co., Ltd.

Ishizaki Co., Ltd.

Kohei Mizutani

Daisuke Kikuchi

Satoshi Wada

Kazuhiko Kojima

Futoshi Hasegawa

Nobuyuki Ishizaki

Takeshi Ouchi

Yoshiharu Urata

A reciprocating body () has valve element () including deflecting surface (), valve shaft () guided by guide cylinder (), and packing () having an annular shape circularly brought into close contact with valve seat () in a state where the reciprocating body () is in a closed position. The valve element () includes large diameter portion (), and small diameter portion () and deflecting portion (). The large diameter portion () has flange surface () supporting the packing () in a state where the packing () is exposed to the primary flow passage side. The flange surface () is formed such that the flange surface () is allowed to come into contact with the valve seat () via the packing (). Recess () is formed on the outer periphery of the small diameter portion (), and a portion of the packing () is fitted in the recess ().

Check valve and reciprocating body for check valve

A coherent Doppler lidar which can oscillate high energy pulses and output laser beams in a longer wavelength range of 1.5 &#x3bc;m to the atmosphere is provided. The coherent Doppler lidar has a pulse laser an oscillation wavelength of which is controlled by means of injection locking of a seed light output from a master laser, wherein the pulse laser is a type in which a laser medium is disposed in a resonator, a pulse light of a predetermined repetition frequency is input to the laser medium as an excitation light, whereby pulse laser oscillation is generated in the resonator to output pulse laser beams from the resonator, and the laser medium being a type which has at least a region having Tm, Ho:YAG ceramics, and is excited by the excitation light to output pulse laser beams in 2 &#x3bc;m wavelength band.

Coherent doppler lidar

Growing community of inventors

Tokyo, Japan

Kohei Mizutani