公开(公告)号：US5815519A

公开(公告)日：1998-09-29

申请号：US799656

申请日：1997-02-11

申请人： Shinichiro Aoshima ,  Haruyasu Ito ,  Yutaka Tsuchiya

发明人： Shinichiro Aoshima ,  Haruyasu Ito ,  Yutaka Tsuchiya

IPC分类号： H01S3/131 ,  H01S3/08 ,  H01S3/081 ,  H01S3/098 ,  H01S3/16 ,  H01S3/10

CPC分类号： H01S3/1112 ,  H01S3/09415 ,  H01S3/0811 ,  H01S3/0816 ,  H01S3/102 ,  H01S3/105

摘要： An ultrashort pulse laser apparatus of the this invention includes (1) a laser medium, (2) a laser resonator which stores the laser medium and externally extracts a laser beam, and (3) an excitation source for outputting an excitation energy to the laser resonator to excite the laser medium. The laser resonator includes (i) a plurality of resonant mirrors disposed on both sides of the laser medium to form a resonant optical path, and (ii) a phase dispersion compensation unit which includes two optical members respectively arranged on two light input/output surface sides of the laser medium on the resonant optical path and compensates phase dispersion of light in the resonant optical path. That is, the laser medium is disposed in the optical path between the two optical members of the phase dispersion compensation unit. With this arrangement, even when the laser medium is arranged almost at the center of the laser resonator to stabilize mode locking, the cavity length of the resonant optical path can be reduced. Therefore, the repetition frequency of laser pulses can be increased, and simultaneously, size reduction of the laser apparatus itself can be achieved.

摘要翻译： 本发明的超短脉冲激光装置包括：（1）激光介质，（2）存储激光介质并从外部提取激光束的激光谐振器，以及（3）向激光器输出激发能的激励源 谐振器来激发激光介质。 激光谐振器包括（i）设置在激光介质的两侧以形成共振光路的多个谐振反射镜，以及（ii）相位色散补偿单元，其包括分别布置在两个光输入/输出表面上的两个光学部件 激光介质在谐振光路上的两侧，并补偿光在共振光路中的相位色散。 也就是说，激光介质设置在相位色散补偿单元的两个光学构件之间的光路中。 通过这种布置，即使激光介质几乎位于激光谐振器的中心以稳定模式锁定，也可以减小谐振光路的腔长。 因此，可以提高激光脉冲的重复频率，同时可以实现激光装置本身的尺寸减小。

公开(公告)号：US5724925A

公开(公告)日：1998-03-10

申请号：US775252

申请日：1996-12-30

申请人： Haruyasu Ito

发明人： Haruyasu Ito

IPC分类号： B60K11/04 ,  B60K11/02 ,  F01P11/10 ,  F04D29/54 ,  F01P7/10

CPC分类号： F01P11/10 ,  B60K11/02 ,  F04D29/541

摘要： A wind directing device for an automotive engine cooling fan includes a shroud surrounding the fan at the outlet side of a radiator. An undercover is disposed below the shroud. A guide wall is disposed below and near the front side of the automotive engine. The guide wall protrudes downwardly beyond the undercover and is bent or curved backwardly. The wind directing device effectively directs wind backwardly of the engine at both high and low engine speeds. Thus, the wind directing device prevents the recirculation phenomenon, enhances the fan flow efficiency and improves the cooling effect without any intermission.

摘要翻译： 用于汽车发动机冷却风扇的风向引导装置包括围绕散热器出口侧的风扇的护罩。 一个卧底位于护罩的下面。 引导壁布置在汽车发动机的前侧下方和附近。 引导壁向下突出超出卧底，并向后弯曲或弯曲。 导风装置在发动机的高低转速下有效地引导发动机的风。 因此，风导向装置防止再循环现象，提高风扇流动效率，并且在没有间歇的情况下提高冷却效果。