公开(公告)号：US4084191A

公开(公告)日：1978-04-11

申请号：US752758

申请日：1976-12-20

Applicant: Eric Gung-Hwa Lean

Inventor： Eric Gung-Hwa Lean

IPC: G02B6/12 ,  G02F1/335 ,  H04N1/04 ,  H04N3/10 ,  H04N3/12 ,  H03H9/00

CPC classification number: H04N3/10

Abstract: A scanning apparatus for converting an optical line image to a serial electrical analog signal by launching an acoustic wave in a plurality of ridged waveguides each of a different length. In one embodiment the launching transducer includes an electro-optical layer which modulates the acoustic wave as a function of the incident light intensity. In a second embodiment the acoustic wave is launched in each waveguide with the same amplitude but interacts with an acousto-optical overlay on the waveguide to amplitude modulate the intensity of the propagating acoustic wave. The thus generated and modulated acoustic waves are converted to electrical signals either by reflection back to the launching transducer or by individual transducers on each channel. The differing lengths converts the parallel image to a series electrical signal.

公开(公告)号：US06404536B1

公开(公告)日：2002-06-11

申请号：US09800474

申请日：2001-03-08

Applicant: Eric Gung-Hwa Lean ,  Chen-Bin Huang ,  Wei-Jen Chou ,  Shu-Mei Yang ,  Chieh Hu

Inventor： Eric Gung-Hwa Lean ,  Chen-Bin Huang ,  Wei-Jen Chou ,  Shu-Mei Yang ,  Chieh Hu

IPC: G02F133

CPC classification number: G02F1/116 ,  G02B27/283 ,  G02F2203/06

Abstract: The present invention pertains to a polarization independent tunable acousto-optical filter and the corresponding method. The filter diffracts an input light beam into a first input light beam unaffected by acoustic waves and a second input light beam affected by acoustic waves. A polarization beam displacer/combiner is employed to separate the input light beam into two orthogonal beams. Several polarized rotators are used to rotate the polarization of light by 90 degrees. An acousto-optical device makes the polarization of light with a particular wavelength rotate by 90 degrees. The two beams are then properly combined to form orthogonal beams. The filtering method has nothing to do with the polarization of the incident light. The filter has such advantages as a high extinction ratio, a small volume and a lower cost.

Abstract translation: 本发明涉及一种与偏振无关的可调谐声光滤波器及相应的方法。 滤波器将输入光束衍射成不受声波影响的第一输入光束和受声波影响的第二输入光束。 采用偏振光束置换器/组合器将输入光束分成两个正交光束。 使用几个极化旋转器将光的偏振旋转90度。 声光装置使具有特定波长的光的偏振旋转90度。 然后将两个光束适当地组合以形成正交光束。 滤波方法与入射光的极化无关。 该过滤器具有消光比高，体积小，成本低等优点。

公开(公告)号：US3994559A

公开(公告)日：1976-11-30

申请号：US642861

申请日：1975-12-22

Applicant: John David Crow ,  Eric Gung-Hwa Lean

Inventor： John David Crow ,  Eric Gung-Hwa Lean

IPC: H01P5/08 ,  G02B6/122 ,  G02B6/30 ,  G02B5/14

CPC classification number: G02B6/30

Abstract: An optical structure for the bidirectional coupling of light between each of a multiplicity of optical fibers and corresponding individual thin-film waveguides to achieve a leaky wave coupling from one guided mode structure to a second guided mode structure. The structure is particularly suited for fabrication by planar deposition and etching techniques and features the precise axial alignment of the optical elements by inserting the fibers in etched V-grooves in the substrate upon which are deposited the waveguides.

Abstract translation: 一种光学结构，用于在多个光纤和相应的各个薄膜波导中的每一个之间双向耦合光以实现从一个引导模式结构到第二引导模式结构的泄漏波耦合。 该结构特别适用于通过平面沉积和蚀刻技术制造，并且通过将光纤插入其中沉积波导的衬底中的蚀刻V形槽中而使光学元件的精确轴向对准。

公开(公告)号：US4084189A

公开(公告)日：1978-04-11

申请号：US645109

申请日：1975-12-29

Applicant: Eric Gung-Hwa Lean

Inventor： Eric Gung-Hwa Lean

IPC: H01L29/66 ,  G10K11/36 ,  H01L27/14 ,  H01L31/00 ,  H04N1/04 ,  H04N3/10 ,  H04N3/14

CPC classification number: G10K11/36 ,  H01L27/14 ,  H04N3/10

Abstract: A thin film optical scanner using phonon echoes. A piezoelectric (an insulator or a semiconductor) crystal has deposited thereon a photoconductor. An acoustic transducer propagates a broad strain wave pulse guided in or on the crystal. A relatively shorter electric field pulse is coupled to the piezoelectric crystal through the photoconductor which has an optical signal focused thereon. The interaction of electric field and strain wave produce a backward travelling acoustic wave which is modulated by the optical signal.

公开(公告)号：US4079404A

公开(公告)日：1978-03-14

申请号：US756042

申请日：1976-12-30

Applicant: Liam David Comerford ,  John David Crow ,  Robert Allan Laff ,  Eric Gung-Hwa Lean ,  Michael John Brady

Inventor： Liam David Comerford ,  John David Crow ,  Robert Allan Laff ,  Eric Gung-Hwa Lean ,  Michael John Brady

IPC: G02B6/12 ,  G02B6/30 ,  G02B6/42 ,  H01L27/15 ,  H01L33/00 ,  H01S5/00 ,  H01S5/022 ,  H01S5/042 ,  H01S5/40 ,  H01L31/12 ,  G02B5/14

CPC classification number: H01S5/02252 ,  G02B6/30 ,  G02B6/42 ,  G02B6/423 ,  G02B6/4249 ,  H01L27/153 ,  H01S5/4031 ,  H01S5/005 ,  H01S5/02284

Abstract: An optical assembly structure wherein miniature optical components such as lasers, modulators, lenses, thin-film and fiber-optic waveguides, and photodetectors are critically aligned and supported for coactive operation by means of two or more wafers which are formed with complementary grooves and mortises to support the loose optical components such as lenses and fiber-optic waveguides and to receive alignment rails to insure the relativity of the wafers, which also have formed integral therewith optical elements such as waveguides, modulators, and lasers, to produce an integrated optical assembly somewhat in the manner of an "optical bench," wherein the bench structure also provides an active optical element.

Abstract translation: 一种光学组件结构，其中诸如激光器，调制器，透镜，薄膜和光纤波导的微型光学部件和光电检测器通过两个或更多个形成有互补凹槽和榫眼的晶片来进行主动对准和支撑以进行共同作用 以支持诸如透镜和光纤波导的松散的光学部件并且接收对准导轨以确保晶片的相对性，其也与光学元件（例如波导，调制器和激光器）形成一体，以产生集成的光学组件 稍微以“光学台”的方式，其中台架结构还提供有源光学元件。