公开(公告)号：US5569238A

公开(公告)日：1996-10-29

申请号：US326658

申请日：1994-10-19

Applicant: Sun-Sheng Shei ,  Ta-Ming Fang

Inventor： Sun-Sheng Shei ,  Ta-Ming Fang

IPC: A61F9/008 ,  A61F9/01 ,  A61N5/06

CPC classification number: A61F9/008 ,  A61F9/00804 ,  A61F9/00817 ,  A61F2009/00872

Abstract: The present invention discloses an optical system for performing a laser photorefractive keratectomy operation on a cornea for vision correction. The optical system comprises a laser source emitting a laser beam. The optical system also includes a beam processing subsystem for receiving and processing the laser beam for generating a processed laser beam suitable for performing the keratectomy operation. The optical system further includes an energy delivery subsystem including a continuous energy-delivery control device which may include time-varying movable slits, rotating diaphragms, or combination of lens system with moving screen, for optically controlling the energy delivered to different areas of the cornea by the processed laser beam for performing the vision correction.

Abstract translation: 本发明公开了一种用于对视角矫正的角膜进行激光屈光角膜切除术的光学系统。 光学系统包括发射激光束的激光源。 光学系统还包括用于接收和处理激光束以产生适于执行角膜切除术操作的经处理的激光束的束处理子系统。 光学系统还包括能量输送子系统，其包括连续能量输送控制装置，其可以包括随时间变化的可移动狭缝，旋转振膜或透镜系统与移动屏幕的组合，用于光学地控制输送到角膜的不同区域的能量 通过处理后的激光束进行视力矫正。

公开(公告)号：US5847573A

公开(公告)日：1998-12-08

申请号：US543250

申请日：1995-10-13

Applicant: Hoton How ,  Ta-Ming Fang

Inventor： Hoton How ,  Ta-Ming Fang

IPC: G01R31/26 ,  G01R31/00

CPC classification number: G01R31/2648

Abstract: A new technique is presented which exploits AC Hall effect in the characterization of layered semiconductor structures. The method involves the use of laser signals by means of optical fibers in the presence of a DC magnetic bias field. Upon incidence the polarization of the optical signal is rotated via a Lorentz force due to the AC Hall effect. As such, the reflected waves carry informations on the Hall mobility of the charge carriers. The calculations show that AC Hall reflection coefficient warrants sufficient intensity to be measured. Our theory is complete in the sense that depth profiling has been explicitly incorporated in the formulation.

Abstract translation: 提出了一种利用交流霍尔效应来表征分层半导体结构的新技术。 该方法涉及在存在DC磁偏置场的情况下通过光纤使用激光信号。 在入射时，由于AC霍尔效应，光信号的偏振由洛伦兹力旋转。 因此，反射波携带关于电荷载体的霍尔迁移率的信息。 计算结果表明，交流霍尔反射系数需要足够的强度进行测量。 我们的理论是完整的，因为深度剖析已经明确地纳入了这个表述。

公开(公告)号：US5568106A

公开(公告)日：1996-10-22

申请号：US222468

申请日：1994-04-04

Applicant: Ta-Ming Fang ,  Hoton How ,  Carmine Vittoria

Inventor： Ta-Ming Fang ,  Hoton How ,  Carmine Vittoria

IPC: H01P1/203 ,  H01P1/215 ,  H01P1/20

CPC classification number: H01P1/2039 ,  H01P1/215

Abstract: The present invention discloses a frequency tunable filter which includes an electromagnetic (E-M) wave propagation line which includes a microstrip and a ground plane in the substrate for transmitting a sequence of E-M signals via the propagation line. The E-M wave propagation line includes a frequency tuning mechanism, i.e., the magnetic layer, which is capable of utilizing a ferromagnetic anti-resonance frequency response to the E-M signals transmitted via the propagation line for controlling and frequency tuning the E-M signal transmission. In one of the preferred embodiments, the E-M wave propagation line includes a microstrip forming on the top surface of a dielectric or semiconductor substrate for receiving and transmitting the E-M signals and a ground plane forming on the bottom surface of the semiconductor substrate. And, the frequency tuning mechanism includes a ferromagnetic layer formed in the substrate between the microstrip and the ground plane.

Abstract translation: 本发明公开了一种频率可调滤波器，其包括电磁（E-M）波传播线，其包括微带和基板中的接地平面，用于经由传播线传输一系列E-M信号。 E-M波传播线包括频率调谐机构，即磁性层，其能够利用经由传播线传输的E-M信号的铁磁反共振频率响应，以控制和频率调谐E-M信号传输。 在一个优选实施例中，E-M波传播线包括形成在电介质或半导体衬底的顶表面上的微带，用于接收和传输E-M信号，以及形成在半导体衬底的底表面上的接地平面。 并且，频率调谐机构包括在微带和接地平面之间的基板中形成的铁磁层。