公开(公告)号：US5852626A

公开(公告)日：1998-12-22

申请号：US903669

申请日：1997-07-31

Applicant: Edward D. Reed

Inventor： Edward D. Reed

IPC: H01S3/06 ,  G01S3/08

CPC classification number: H01S3/0617 ,  H01S3/0407 ,  H01S3/061 ,  H01S3/0615

Abstract: A cylindrically shaped gain medium for a laser resonant cavity. The gain medium has an outer cylindrical side surface and two opposing end faces. An annular groove is formed in the side surface. An energy source excites the gain medium to create a laser beam inside the cavity. The laser beam passes longitudinally through the gain medium. The annular groove defines an annular aperture inside the gain medium for the laser beam. The annular aperture has a diameter that is smaller than a diameter of the side surface and the end faces.

Abstract translation: 用于激光谐振腔的圆柱形增益介质。 增益介质具有外圆柱形侧表面和两个相对的端面。 在侧面形成环状槽。 能量源激发增益介质以在空腔内产生激光束。 激光束纵向通过增益介质。 环形槽在激光束的增益介质的内部限定一个环形孔。 环形孔的直径小于侧面和端面的直径。

公开(公告)号：US5745078A

公开(公告)日：1998-04-28

申请号：US523920

申请日：1995-09-06

Applicant: Elie J. Baghdady

Inventor： Elie J. Baghdady

IPC: G01S3/04 ,  G01S3/08 ,  H01Q21/20

CPC classification number: G01S3/043 ,  G01S3/04 ,  G01S3/08 ,  H01Q21/20

Abstract: This disclosure relates to multi-element antenna clusters or arrays for the reception and transmission of radio waves for direction-finding, navigation aid and emitter and/or receiver location purposes. In particular, it relates to arrangements of multiple antennas whereby the direction of propagation (arrival or departure) of a wavefront is determined from a combination of the amplitudes of phasor (or total individual antenna output) differences between pairs of antennas, said arrangements being along certain geometrical patterns, such as a circle, an ellipse, a polygon, an open straight line, etc., with at least one longest dimension measuring more than one wavelength of the incident or departing wave. Although described in terms of electromagnetic waves and hence antennas as receiving sensors or radiators, this invention in reality applies to any other form of propagating waveborne energy, such as acoustic, ultrasonic, seismic, etc.

公开(公告)号：US3093827A

公开(公告)日：1963-06-11

申请号：US85908059

申请日：1959-12-11

Applicant: TRAVERS DOUGLAS N

Inventor： TRAVERS DOUGLAS N

IPC: G01S3/08

CPC classification number: G01S3/085

公开(公告)号：US2915752A

公开(公告)日：1959-12-01

申请号：US40086653

申请日：1953-12-29

Applicant: RAYTHEON CO

Inventor： SUMNER RICEMAN

IPC: G01S3/08 ,  H01Q7/08

CPC classification number: H01Q7/08 ,  G01S3/085

公开(公告)号：US2687521A

公开(公告)日：1954-08-24

申请号：US25266351

申请日：1951-10-23

Applicant: TELEFUNKEN GMBH

Inventor： ALBERT TROOST

IPC: G01S3/02 ,  G01S3/08

CPC classification number: G01S3/023 ,  G01S3/08

公开(公告)号：US2532176A

公开(公告)日：1950-11-28

申请号：US63653145

申请日：1945-12-21

Applicant: RCA CORP

Inventor： LUCK DAVID G C

IPC: G01S3/08 ,  H01Q21/12

CPC classification number: H01Q21/12 ,  G01S3/08

公开(公告)号：US2457126A

公开(公告)日：1948-12-28

申请号：US60804645

申请日：1945-07-31

Applicant: STANDARD TELEPHONES CABLES LTD

Inventor： CHESUS FRANK O ,  THOMAS FRANK G

IPC: G01S3/08

CPC classification number: G01S3/08

公开(公告)号：US2413981A

公开(公告)日：1947-01-07

申请号：US43237042

申请日：1942-02-26

Applicant: RCA CORP

Inventor： LUCK DAVID G C

IPC: G01S3/08

CPC classification number: G01S3/08

公开(公告)号：US2404012A

公开(公告)日：1946-07-16

申请号：US24471038

申请日：1938-12-08

Applicant: WORRALL ROBERT H

Inventor： WORRALL ROBERT H

IPC: G01S3/08

CPC classification number: G01S3/08

公开(公告)号：US2312421A

公开(公告)日：1943-03-02

申请号：US40001541

申请日：1941-06-27

Applicant: KURT KOSCHMIEDER

Inventor： KURT KOSCHMIEDER

IPC: G01S3/08 ,  H01Q9/16

CPC classification number: H01Q9/16 ,  G01S3/08