Differential absorption laser radar gas detection apparatus having
tunable wavelength single mode semiconductor laser source
    1.
    发明授权
    Differential absorption laser radar gas detection apparatus having tunable wavelength single mode semiconductor laser source 失效
    差分吸收激光雷达气体检测仪具有可调波长单模半导体激光源

    公开(公告)号:US5015099A

    公开(公告)日:1991-05-14

    申请号:US492784

    申请日:1990-03-12

    IPC分类号: G01N21/39

    CPC分类号: G01N21/39 G01N2021/394

    摘要: A light source has a tunable wavelength single mode semiconductor laser. The laser outputs a single mode laser beam having a wavelength tuned in accordance with a drive current and emits, for an object to be detected, at least a first laser beam having a first wavelength which is absorbed by a gas to be detected and a second laser beam having a second wavelength which is not absorbed by the gas to be detected. A controller switches the drive current having a predetermined value corresponding to the first or second wavelength at a predetermined period and supplies the drive current to the laser and controls the drive current having the predetermined value corresponding to the first or second wavelengths so that the first or second laser beams are alternately output from the laser with substantially the same power while the first and second wavelengths are maintained. A light-receiving unit receives first and second response light components generated when the first and second laser beams emitted alternately from the laser are incident on the object to be detected and outputs electrical signals corresponding to received light amounts of the first and second response light components. A signal processor receives the electrical signals from the light-receiving unit and processes the presence/absence of gas detection in accordance with a difference between the received light amounts of the first and second response light components.

    摘要翻译: 光源具有可调波长单模半导体激光器。 激光器输出具有根据驱动电流调谐的波长的单模激光束,并且对于被检测物体发射至少一个具有被待检测气体吸收的第一波长的第一激光束和第二激光束 具有不被待检测气体吸收的第二波长的激光束。 控制器以预定周期切换具有对应于第一或第二波长的预定值的驱动电流,并将驱动电流提供给激光器,并控制具有与第一或第二波长对应的预定值的驱动电流,使得第一或第二波长 在保持第一和第二波长的同时,第二激光束以大致相同的功率从激光器交替地输出。 光接收单元接收当从激光器交替地发射的第一和第二激光束入射到被检测物体时产生的第一和第二响应光分量,并输出与第一和第二响应光分量的接收光量相对应的电信号 。 信号处理器接收来自光接收单元的电信号,并且根据第一和第二响应光分量的接收光量之间的差来处理气体检测的存在/不存在。

    Device for shaping corrugated fin
    3.
    发明申请
    Device for shaping corrugated fin 失效
    波纹管成型装置

    公开(公告)号:US20060254334A1

    公开(公告)日:2006-11-16

    申请号:US11414258

    申请日:2006-05-01

    IPC分类号: B21D53/04

    CPC分类号: B21D53/04 B21D13/00

    摘要: The configuration comprises a shaping member 3 having a substantially rectangular shape and shaping the inner surface side of a bent portion 1b, a worm gear 2 slidably linked with the shaping member 3 and gradually reducing the distance between the shaping members 3 for sequentially feeding the shaping member 3 from one side to the other side, and a reference member 4 arranged so that the upper end surface of the bent portion 1b comes into contact with its reference surface, and the distance between the shaping members 3 is gradually reduced to a predetermined fin pitch and the upper end surface of the bent portion 1b is shaped into a predetermined shape by rotating the worm gear 2 after the plurality of bent portions 1b are arranged at the shaping members 3. Due to this, it is possible to shape the bent portion into a continuous and stable shape.

    摘要翻译: 该构造包括具有大致矩形形状并且成形弯曲部分1b的内表面侧的成形构件3,与成形构件3可滑动地连接的蜗轮2,并逐渐减小成形构件3之间的距离,以顺序地将 成形构件3从一侧到另一侧,以及参考构件4,其被布置成使得弯曲部1b的上端表面与其基准面接触,并且成形构件3之间的距离逐渐减小到 在多个弯曲部1b布置在成型构件3之后,通过使蜗轮2旋转,将预定的翅片间距和弯曲部1b的上端面成形为预定的形状。 由此,可以将弯曲部形成为连续稳定的形状。

    Superluminescent diode
    4.
    发明授权
    Superluminescent diode 失效
    超发光二极管

    公开(公告)号:US4901123A

    公开(公告)日:1990-02-13

    申请号:US277088

    申请日:1988-11-28

    摘要: According to this invention, a superluminescent diode includes a current injection portion having a current injection electrode formed adjacent to a first end face, a light-absorption portion contiguous with the current injection portion; and a waveguide continuously formed to extend from the current injection portion to the light-absorption portion. The waveguide is constituted by an active layer and a member which completely buries the active layer, has a bandgap larger than that of the active layer, and is formed of a material having a small refractive index. The waveguide of the current injection portion is linearly formed to be perpendicular to the first end face. The waveguide of the light-absorption portion has an end portion for guiding reflected light in a direction different from a propagation direction of light propagating through the waveguide.

    High-pressure discharge lamp, and manufacturing method, lighting method, and lighting device for the same
    6.
    发明授权
    High-pressure discharge lamp, and manufacturing method, lighting method, and lighting device for the same 有权
    高压放电灯及其制造方法,照明方法和照明装置

    公开(公告)号:US06545430B2

    公开(公告)日:2003-04-08

    申请号:US09844321

    申请日:2001-04-27

    IPC分类号: G05F100

    摘要: A high pressure discharge lamp having a pair of electrodes with a space of 0.5 mm to 2.0 mm inclusive between them and disposed in an arc tube. An electrical discharge takes place between the electrodes. Each of the electrodes has an electrode rod and a head that is provided at the discharge side end of the electrode rod and having a larger diameter than the electrode rod. A surface of the head being opposite to the other electrode is convexly curved and a protruding part is formed in the vicinity of the center portion of the end of the head.

    摘要翻译: 一种高压放电灯,具有一对电极,它们之间具有0.5mm至2.0mm的空间,并且设置在电弧管中。 在电极之间发生放电。 每个电极具有设置在电极棒的放电侧端部并且具有比电极棒更大的直径的电极棒和头部。 与另一个电极相对的头部的表面是凸形弯曲的,并且在头部的端部的中心部分附近形成有突出部分。

    Semiconductor laser with two active layers
    7.
    发明授权
    Semiconductor laser with two active layers 失效
    半导体激光器具有两个有源层

    公开(公告)号:US4426704A

    公开(公告)日:1984-01-17

    申请号:US317592

    申请日:1981-11-02

    摘要: In a semiconductor laser, a laminated multi-layer body is on a prescribed region of the surface of a semiconductor substrate of first conductivity type, and a burying laminated layer body surrounds the laminated layer body in contact with the lateral wall thereof. The laminated layer body includes a first cladding layer having the first conductivity type, a first active layer, a second cladding layer having the opposite conductivity type (second conductivity type) to that of the semiconductor substrate, a second active layer and a third cladding layer of the first conductivity type. The burying laminated layer body includes a semiconductor electrode layer of the second conductivity type and low specific resistivity which substantially contacts the second cladding layer, and two groups of burying layers respectively provided on the prescribed regions of the top and bottom surface of said semiconductor electrode layer. When a prescribed amount of direct current is supplied to a first electrode mounted on the upper side of the laminated layer body, a second electrode deposited on the bottom side of said laminated layer body and a third electrode set on the semiconductor electrode layer included in the burying layer body, then the first and second active layers arranged very close to each other simultaneously oscillate two independent laser beams admitting of modulation with a low threshold current value.

    摘要翻译: 在半导体激光器中,叠层多层体位于第一导电型的半导体衬底的表面的规定区域上,并且埋层层叠体围绕层叠体与其侧壁接触。 叠层体包括具有第一导电类型的第一包层,第一有源层,具有与半导体衬底相反的导电类型(第二导电类型)的第二覆层,第二有源层和第三覆层 的第一导电类型。 埋入叠层体包括第二导电类型的半导体电极层和与第二覆层基本接触的低电阻率,以及分别设置在所述半导体电极层的顶表面和底表面的规定区域上的两组掩埋层 。 当向安装在层叠体主体的上侧的第一电极提供预定量的直流电流时,沉积在所述叠层体的底侧上的第二电极和设置在所述层叠体主体的半导体电极层上的第三电极 埋置层体,则彼此非常接近地布置的第一和第二有源层同时振荡允许具有低阈值电流值的调制的两个独立激光束。

    Method for producing a lead containing monomer composition and a
radiation shielding polymer
    8.
    发明授权
    Method for producing a lead containing monomer composition and a radiation shielding polymer 失效
    含铅单体组合物和辐射屏蔽聚合物的制造方法

    公开(公告)号:US4182821A

    公开(公告)日:1980-01-08

    申请号:US850965

    申请日:1977-11-14

    CPC分类号: G21F1/10

    摘要: A method for producing a lead containing monomer composition comprising reacting a mixture comprising (1) at least one monomer selected from the group consisting of alkyl methacrylate having 1-4 carbon atoms in an alkyl group, hydroxyalkyl acrylate, hydroxyalkyl methacrylate and styrene, (2) acrylic or methacrylic acid, (3) an organic acid having the general formula: R.sub.1 COOH, wherein R.sub.1 is hydrocarbon residue having 5-20 carbon atoms and optionally (4) an organic acid having the general formula: R.sub.2 COOH, wherein R.sub.2 is hydrocarbon residue having 2-4 carbon atoms with lead monoxide. The composition is polymerized to obtain a radiation shielding polymer.

    摘要翻译: 一种含铅单体组合物的制造方法,其特征在于,使含有(1)选自由烷基中的碳原子数为1〜8的甲基丙烯酸烷基酯,丙烯酸羟烷基酯,甲基丙烯酸羟烷基酯和苯乙烯中的至少一种以上的单体,(2) )丙烯酸或甲基丙烯酸,(3)具有以下通式的有机酸:R1COOH,其中R1是具有5-20个碳原子的烃基,和任选地(4)具有以下通式的有机酸:R2COOH,其中R2是烃残基 具有2-4个碳原子与一氧化铅。 将组合物聚合以获得辐射屏蔽聚合物。

    Radiation shielding material and a process for producing the same
    9.
    发明授权
    Radiation shielding material and a process for producing the same 失效
    辐射屏蔽材料及其制造方法

    公开(公告)号:US4129524A

    公开(公告)日:1978-12-12

    申请号:US815175

    申请日:1977-07-13

    IPC分类号: G21F1/10

    CPC分类号: G21F1/10

    摘要: A radiation shielding material of a composition containing a polymer comprising (A) at least one essential monomer selected from the group consisting of alkyl methacrylate having 1 - 4 carbon atoms in an alkyl group, hydroxyalkyl acrylate, hydroxyalkyl methacrylate and styrene and (B) lead acrylate or lead methacrylate, and a lead carboxylate represented by the general formula: (RCOO).sub.a Pb, a being an integer equal to the valency of lead and R representing a saturated or unsaturated hydrocarbon residue having 5 - 20 carbon atoms, wherein the ratio x (% by weight) of the lead acrylate or lead methacrylate to the total constituent monomer in the polymer and the compounding ratio y (parts by weight) of the lead carboxylate to 100 parts by weight of said total monomer in said composition satisfy any one of the following three formulas I, II and III:200.gtoreq.y.gtoreq.2, where 9.ltoreq.x.ltoreq.30 (I)200.gtoreq.y.gtoreq.2/5(x - 30)+ 2, where 30.ltoreq.x.ltoreq.75(II) and200.gtoreq.y.gtoreq.-9/10(x - 75) + 20, where 75.ltoreq.x.ltoreq.95(III).

    摘要翻译: 含有聚合物的组合物的辐射屏蔽材料,其包含(A)至少一种选自烷基中具有1-4个碳原子的甲基丙烯酸烷基酯,丙烯酸羟烷基酯,甲基丙烯酸羟烷基酯和苯乙烯的必需单体和(B)铅 丙烯酸酯或甲基丙烯酸铅,和由以下通式表示的羧酸铅:(RCOO)aPb,a等于铅的化合价的整数,R表示具有5-20个碳原子的饱和或不饱和烃残基,其中x 丙烯酸铅或甲基丙烯酸甲酯与聚合物中的总构成单体的重量比(重量%)和羧酸铅的配混比率y(重量份)相对于所述组合物中的所述总单体100重量份满足任何一个 以下三个公式I,II和III: