公开(公告)号：USH584H

公开(公告)日：1989-02-07

申请号：US943229

申请日：1986-12-18

申请人： Felix Schwering ,  Song-Tsuen Peng

发明人： Felix Schwering ,  Song-Tsuen Peng

IPC分类号： H01Q13/24

CPC分类号： H01Q13/24

摘要： A circular symmetrical dielectric antenna structure and feed arrangement provide an omni-directional radiation pattern. The antenna includes a linear dielectric feed section, an integral radiating section having a taper which decreases outwardly, and an excitation means coupling millimeter wave energy to the feed section. The entire structure is circularly symmetrical about a central longitudinal axis. A first embodiment is in the form of a longitudinal dielectric rod having a uniform diameter at the feed and with circular periodically spaced corrugations at the radiating end. A tapered intermediate section has grooves of increasing depth, with the depth being constant at the remainder of the radiating end. A circular waveguide couples energy to a tapered dielectric transition section to provide excitation to the uniform feed end. A second embodiment is in the form of a flat circular disk having tapered radiating ends. A central metal cap limits radiation from the top surface. Excitation is provided by a circular metal waveguide coupled to a tapered dielectric transition section, a coaxial cable connected along the central axis, or a rectangular to circular metal waveguide coupling.

公开(公告)号：US5245596A

公开(公告)日：1993-09-14

申请号：US721036

申请日：1991-06-26

申请人： Mool C. Gupta ,  Song-Tsuen Peng

发明人： Mool C. Gupta ,  Song-Tsuen Peng

IPC分类号： G02B5/18 ,  G11B7/135

CPC分类号： G11B7/1353 ,  G02B5/1866 ,  Y10S359/90

摘要： An optical head is disclosed in which a beam from a diode laser is directed onto an optical disc, and a beam reflected from the optical disc is passed through an optical device which forms a plurality of discrete beams of different orders. The beams from the optical device are focussed onto photodetectors, and signals from the photodetectors are used for error detection, tracking, and signal detection. The optical device comprises two diffraction gratings which are supported on a substrate and are separated from each other by a thin film. In order to obtain the advantages of a doubly-periodic structure, the thickness of the thin film between the two gratings is very accurately controlled to be on the order of the wavelength of the incident beam of radiation.

摘要翻译： 公开了一种光学头，其中来自二极管激光器的光束被引导到光盘上，并且从光盘反射的光束通过形成不同阶数的多个离散光束的光学装置。 来自光学装置的光束被聚焦到光电检测器上，并且来自光电检测器的信号用于检错，跟踪和信号检测。 该光学器件包括两个衍射光栅，它们被支撑在一个衬底上并且被薄膜彼此分开。 为了获得双周期结构的优点，两个光栅之间的薄膜的厚度被非常精确地控制为入射入射光束的波长的数量级。

公开(公告)号：US5130857A

公开(公告)日：1992-07-14

申请号：US721037

申请日：1991-06-26

申请人： Mool C. Gupta ,  Song-Tsuen Peng

发明人： Mool C. Gupta ,  Song-Tsuen Peng

IPC分类号： G02B5/18 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B7/1353 ,  G02B5/1866 ,  G11B11/10532

摘要： A method is disclosed for making an optical device which is adapted to diffract an incident beam of radiation to form a plurality of discrete diffracted beams of different orders. The optical device comprises two diffraction gratings which are supported on a substrate and are separated from each other by a thin film. In order to obtain the advantages of a doubly-periodic structure, the thickness of the thin film between the two gratings is very accurately controlled to be on the order of the wavelength of the incident beam of radiation.

摘要翻译： 公开了一种用于制造适于衍射入射入射光束以形成不同阶数的多个离散衍射光束的光学装置的方法。 该光学器件包括两个衍射光栅，它们被支撑在一个衬底上并且被薄膜彼此分开。 为了获得双周期结构的优点，两个光栅之间的薄膜的厚度被非常精确地控制为入射入射光束的波长的数量级。

公开(公告)号：US5175647A

公开(公告)日：1992-12-29

申请号：US721021

申请日：1991-06-26

申请人： Mool C. Gupta ,  Song-Tsuen Peng

发明人： Mool C. Gupta ,  Song-Tsuen Peng

IPC分类号： G02B5/18

CPC分类号： G02B27/4272 ,  G02B27/4238

摘要： An optical device is disclosed for diffracting an incident beam of radiation to form a plurality of discrete diffracted beams of different orders. The optical device comprises two diffraction gratings which are supported on a substrate and are separated from each other by a thin film. In order to obtain the advantages of a doubly-periodic structure, the thickness of the thin film between the two gratings is very accurately controlled to be on the order of the wavelength of the incident beam of radiation.

摘要翻译： 公开了用于衍射入射入射光束以形成不同阶数的多个离散衍射光束的光学装置。 该光学器件包括两个衍射光栅，它们被支撑在一个衬底上并且被薄膜彼此分开。 为了获得双周期结构的优点，两个光栅之间的薄膜的厚度被非常精确地控制为入射入射光束的波长的数量级。

公开(公告)号：US3982810A

公开(公告)日：1976-09-28

申请号：US594416

申请日：1975-07-09

申请人： Theodor Tamir ,  Song-Tsuen Peng

发明人： Theodor Tamir ,  Song-Tsuen Peng

IPC分类号： G02B6/34 ,  G02B5/14

CPC分类号： G02B6/34

摘要： There is disclosed a technique whereby a dielectric grating disposed on a in film that has a surface wave propagating thereon can concentrate the power from this wave into a beam that is either above or below the grating according to the profile of the grating. By this technique, surface waves traveling in different directions can be distinguished and the efficiency of optical beam couplers can be improved, among other applications.

摘要翻译： 公开了一种技术，其中设置在具有在其上传播的表面波的薄膜上的介质光栅可以根据光栅的轮廓将来自该波的功率集中在光栅的上方或下方的光束中。 通过这种技术，可以区分在不同方向上行进的表面波，并且可以提高光束耦合器的效率以及其他应用。