公开(公告)号：US5764664A

公开(公告)日：1998-06-09

申请号：US650009

申请日：1996-05-17

Applicant: Kwok Leung Yip ,  Richard Frank Kerr ,  Sreeram Dhurjaty

Inventor： Kwok Leung Yip ,  Richard Frank Kerr ,  Sreeram Dhurjaty

IPC: H04N1/40 ,  H01J3/10

CPC classification number: H04N1/40043 ,  H04N1/40037

Abstract: A laser imaging apparatus comprising: a laser diode which is always operable in a linear lasing region; an amplitude modulator for amplitude modulating said laser diode for a digital image signal applied to said laser diode, when said digital image signal has a code value in a first range of code values in the mid to high range of signal code values; and a high speed pulse width modulator for pulse width modulating said laser diode when said digital signal, which is applied to said laser diode, has a code value in a second range of code values below said first range of code values, said laser diode being operated at a constant predetermined power level which is above the threshold power level of said laser diode.

Abstract translation: 一种激光成像设备，包括：激光二极管，其总是可在线性激光区域中操作; 当所述数字图像信号在信号码值的中间到高范围内的码值的第一范围内具有代码值时，用于对施加到所述激光二极管的数字图像信号幅度调制所述激光二极管的幅度调制器; 以及高速脉冲宽度调制器，用于当施加到所述激光二极管的所述数字信号具有低于所述第一代码值范围的第二代码值范围内的代码值时，脉冲宽度调制所述激光二极管，所述激光二极管为 以高于所述激光二极管的阈值功率电平的恒定的预定功率电平工作。

公开(公告)号：US4275317A

公开(公告)日：1981-06-23

申请号：US23485

申请日：1979-03-23

Applicant: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch ,  James B. Laudenslager ,  Thomas J. Pacala

Inventor： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch ,  James B. Laudenslager ,  Thomas J. Pacala

IPC: H01S3/097 ,  H03K17/00 ,  H03K17/80 ,  G11C13/02 ,  H01J3/10

CPC classification number: H01S3/097 ,  H03K17/80 ,  H03K2217/0036

Abstract: A saturable inductor switch for compressing the width and sharpening the rise time of high voltage pulses from a relatively slow rise time, high voltage generator to an electric discharge gas laser (EDGL). The switch also provides a capability for efficient energy transfer from a high impedance primary source to an intermediate low impedance laser discharge network. More specifically, a saturable inductor switch is positioned with respect to a capacitive storage device, such as a coaxial cable, so that when a charge build-up in the storage device reaches a predetermined level, saturation of the switch inductor releases or switches energy stored in the capacitive storage device to the EDGL. Also disclosed are cascaded saturable inductor switches for providing output pulses having rise times of less than ten nanoseconds as required for efficient excitation of EDGL's, the pulse rise time being determined by the thickness of a high permeability material forming the saturable inductor switch. In addition, a technique for magnetically biasing the saturable inductor switch is disclosed so that only pulses from a pulse generator having one polarity are passed and pulses having the other polarity are blocked, thereby improving the lifetime of electrical components that are sensitive to voltage reversals.

Abstract translation: 一种可饱和电感开关，用于压缩宽度，并将高电压脉冲的上升时间从相对较慢的上升时间，高电压发生器到放电气体激光器（EDGL）进行锐化。 该开关还提供了从高阻抗初级源到中间低阻抗激光放电网络的有效能量传输的能力。 更具体地，可饱和电感器开关相对于诸如同轴电缆的电容性存储装置定位，使得当存储装置中的电荷积聚达到预定水平时，开关电感器的饱和度释放或切换存储的能量 在电容式存储设备中进行EDGL。 还公开了级联可饱和电感器开关，用于提供具有小于10纳秒的上升时间的输出脉冲，用于EDGL的有效激发所需的脉冲上升时间由形成可饱和电感器开关的高磁导率材料的厚度确定。 此外，公开了用于对可饱和电感器开关进行磁偏置的技术，使得仅来自具有一个极性的脉冲发生器的脉冲通过，并且具有另一极性的脉冲被阻挡，从而提高对电压反转敏感的电气部件的寿命。

公开(公告)号：CA2289931A1

公开(公告)日：1998-11-19

申请号：CA2289931

申请日：1998-05-11

Applicant: PHOTOCURE ASA

Inventor： STEEN HARALD B

IPC: A61N5/06 ,  H01J20060101 ,  H01J3/10

Abstract: A device for irradiating a limited, defined area where uniform and intense irradiation is obtained of a sharply defined light field (7) of variable size, the light from a halogen lamp (1) or similar incoherent light source being directed by means of an elliptical mirror (2) towards one end surface (3) of a transparent rod (4) whose opposite end surface (6) is thereby uniformly irradiated and is imaged by a lens (7) in the area (9) which has to be irradiated.

公开(公告)号：DE3854882D1

公开(公告)日：1996-02-22

申请号：DE3854882

申请日：1988-07-28

Applicant: CANON KK

Inventor： SHIMIZU AKIRA ,  SUZUKI HIDETOSHI ,  OKUNUKI MASAHIKO ,  ONO HARUHITO ,  NOMURA ICHIRO ,  BANNO YOSHIKAZU ,  TAKEDA TOSHIHIKO ,  KANEKO TETSUYA

IPC: H01J3/10 ,  H01J1/316 ,  H01J3/18 ,  H01J3/30 ,  H01J1/30

公开(公告)号：BR9004568A

公开(公告)日：1991-09-10

申请号：BR9004568

申请日：1990-09-06

Applicant: FIBERSTARS INC

Inventor： AWAI GEORGE K ,  LEE SONG S

IPC: F21V8/00 ,  F21V9/00 ,  F21V9/04 ,  F21V13/08 ,  G02B6/42 ,  H01J61/34 ,  H01J61/35 ,  H01J61/10 ,  H01J61/18 ,  H01J61/70 ,  H01J3/10 ,  H01J3/16 ,  H01J61/40

Abstract: A lighting apparatus for illuminating optical fibers includes a high-intensity gas-discharge lamp comprising electrodes (9,11) positioned within a reflector assembly (24) that focuses radiation (51,53) from the electrodes (9,11) onto a remote focal point (39), and that selectively transmits and reflects desired visible radiation and attenuates undesirable ultraviolet and infrared radiation. Alignment procedures in assembly process ensure maximization of flux intensity supplied to optical fibers positioned at the remote focal point (39) of the reflector assembly.

公开(公告)号：DE2902680C2

公开(公告)日：1983-08-25

申请号：DE2902680

申请日：1979-01-24

Applicant: FUJITSU LTD., KAWASAKI, KANAGAWA, JP

Inventor： KURIHARA, HIROSHI, DIPL.-ING., TOKYO, JP ,  KATOH, TADAYOSHI, DIPL.-ING., KAWASAKI, KANAGAWA, JP

IPC: H03H7/06 ,  H03H11/04 ,  H03L7/093 ,  H03L7/10 ,  H04B7/155 ,  H04L27/22 ,  H03H7/01 ,  H03D1/24 ,  H03H19/00 ,  H01J3/10 ,  H03J7/04

Abstract: A band-pass filter circuit comprising a band-pass filter for removing noise modulation components from an input signal comprising a carrier sine wave, a phase detector for detecting a phase difference between input and output signals of the band-pass filter, a loop filter supplied with the output from the phase detector, and automatic control means for effecting control by the output from the loop filter so that a difference between the frequency of the input sine wave and the center frequency of the band-pass filter is reduced to zero. For carrier recovery in a burst mode, the loop filter is selected for each particular case so that high-speed pulling-in is possible even if a narrow-band filter is employed as the band-pass filter for the removal of noise components. Also, high-speed and high-precision pulling-in is achieved when many bursts of different frequencies are applied in one frame period. Further, when common and individual frequency variations occur at the same time, high-speed pulling-in is also achieved for each burst.

公开(公告)号：DE1953712B2

公开(公告)日：1979-09-06

申请号：DE1953712

申请日：1969-10-24

Applicant: THOMSON-BRANDT, PARIS

Inventor： CAHEN, OLIVIER ,  PIRCHER, GEORGES ,  PICQUENDAR, JEAN EDGAR, ST. REMY- LES-CHEVREUSES

IPC: G05D3/20 ,  H01J37/20 ,  H01J37/304 ,  H01L21/68 ,  H01J37/30 ,  H01J3/10 ,  H01L21/31

公开(公告)号：CA940996A

公开(公告)日：1974-01-29

申请号：CA119393

申请日：1971-07-29

Applicant: COLUMBIA BROADCASTING SYST INC

Inventor： GLENN WILLIAM E JR

IPC: H01J3/10 ,  H01J37/063 ,  H01J37/065

Abstract: In an electron gun, an anode structure in which the electron beam aperture is defined by four mutually insulated anode segments which may be energized to provide beam centering. In a preferred embodiment, the anode segments are shaped to intercept the beam if it is off-center, and are returned to ground potential through respective resistors thereby being operative automatically to center the beam.

公开(公告)号：GB1330366A

公开(公告)日：1973-09-19

申请号：GB3394471

申请日：1971-07-20

Applicant: COLUMBIA BROADCASTING SYST INC

IPC: H01J3/10 ,  H01J37/063 ,  H01J37/065 ,  H01J29/48 ,  H01J29/82

Abstract: 1330366 Electron guns COLUMBIA BROADCASTING SYSTEM Inc 20 July 1971 [12 Aug 1970] 33944/71 Heading H1D An electron gun for producing a focussed beam of electrons comprises filamentary cathode 10, an anode including a plurality of mutually insulated angularly spaced elongate segments 36, 38 (40, 42) (Figs. 3 and 5, not shown) having an opening for the passage of electrons and the anode further having a beam defining aperture 78 1 and a grid electrode 14. The construction enables the beam to be centred on the defining apertures, and preferably the segments are connected to ground for instance via 5M# resistors (Fig. 5, not shown) any segment intercepting the beam becoming negatively charged to deflect the beam. Alternatively, potentials may be applied to opposed segments. Cathode 10 and conductors 16, 18 in ceramic header 20 are preferably of W. Cylindrical grid 14 is secured to rectangular ceramic frame 24 secured by screws 26 preferably in metal pins 27. Grid 14 may be stainless steel and dimensions are given. The anode segments may be formed by drilling and slotting a Ti rod, e.g. 0À802 inch long and “ inch diameter screw holes (37a, 37b) being initially formed for attachment to ceramic spacers 60, 66 preferably boron nitride or anodized Al about Ti anode shield 46. Slot, bore and taper dimensions are disclosed, bore 70 being 0À005 inch diameter for example. Ti cup 72 includes portion 74 spaced 0À030 inch from the segments and Pt disc insert 78 with beam defining aperture 78 1 , (e.g. 10Á diameter) the insert being spot welded or held by a retaining member. Beam current may be 100 nanoamps through aperture 78 1 , 500 Áamps. being intercepted. Dimensions are given of filament 10, and grid 14, shield 46 extending 0À019 inch into grid 14. Conventional c.r.t., and electron beam recorders as in U.S. Patent Specification 3,116,962 are exemplified and the formation of an information pattern on an electron sensitive film medium for later reproduction by scanning with a flying spot scanner, is mentioned. The election beam recorder is for example, demountable, includes differentially pressurized chambers, a thermoplastic recording medium, and a cooling arrangement.

公开(公告)号：JP2000090851A

公开(公告)日：2000-03-31

申请号：JP26025098

申请日：1998-09-14

Applicant: SONY CORP

Inventor： ICHIDA KOUSUKE

IPC: H01J3/02 ,  G21K1/087 ,  H01J3/10 ,  H01J29/48 ,  H01J37/10

Abstract: PROBLEM TO BE SOLVED: To reduce a crossover diameter, consequently reduce an electron beam spot diameter on a plane of projection and lengthen the life of a cathode. SOLUTION: A first electron beam 20 emitted from a cathode 11 is converted into light by a phosphor film 31 provided on an emittance conversion element 21. The converted light is converted into a second electron beam 25 emitted perpendicularly to a plane of a photo cathode film 34 by the photo cathode film 34. A diameter of a crossover 24 is determined by only sum of aberration of an electric field lens formed of second grids 22, 23 and an electronic repulsion effect, a spot size of second electron beam 25 on a plane of projection is made smaller and the life of the cathode 11 is lengthened.