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    • 103. 发明授权
    • Laser beam generating apparatus
    • 激光束发生装置
    • US06404786B1
    • 2002-06-11
    • US09543136
    • 2000-04-05
    • Kenji KondoMichio OkaHiroyuki Wada
    • Kenji KondoMichio OkaHiroyuki Wada
    • H01S310
    • G02F1/3501G02F2001/3505
    • A laser beam in the ultraviolet region is generated at high power for along period. A green laser beam generated by a laser oscillator comes incident into a resonator from behind a first curved mirror, and circulates there, reflected by each mirror. By passing a barium borate crystal, it causes a secondary harmonic (a laser beam in the ultraviolet region) to be generated, which is taken out of the resonator via a second curved mirror. The beam waist of the laser beam passing the barium borate crystal is set to 46 &mgr;m, about double the conventional thickness, by adjusting the distance between the first curved mirror and a second flat mirror. As a result, the power density of the laser beam in the barium borate crystal is reduced to ¼ of the value according to the related art, and it is made possible to avoid rapid degradation of the barium borate crystal by excessive squeezing of the laser beam.
    • 紫外线区域的激光束在高功率下产生一段时间。 由激光振荡器产生的绿色激光束从第一曲面镜的后面入射到谐振器中,并在那里循环,由每个反射镜反射。 通过使硼酸钡晶体通过,产生二次谐波(紫外区域中的激光束),其通过第二曲面镜从谐振器中取出。 通过硼酸钡晶体的激光束的束腰通过调整第一曲面镜和第二平面镜之间的距离而设定为46μm,约为传统厚度的两倍。 结果,根据现有技术,硼酸钡晶体中的激光束的功率密度降低到1/4的值,并且可以避免过度挤压激光束导致硼酸钡晶体的快速降解 。
    • 106. 发明授权
    • Optical system having stable resonator
    • 具有稳定谐振器的光学系统
    • US06181461B2
    • 2001-01-30
    • US09162105
    • 1998-09-28
    • Hiroyuki WadaHisashi MasudaKenji KondoMichio OkaYuushi Kaneda
    • Hiroyuki WadaHisashi MasudaKenji KondoMichio OkaYuushi Kaneda
    • G02F135
    • G02F1/37G02F2001/3542
    • In an optical system having at least one optical part other than mirrors, for example, a wavelength conversion optical system which uses an external resonator, an optical system which is capable of solving the problem of transverse mode generation due to the existence of scattering matter and the optical crystal used and capable of supplying a stable output (stable wavelength conversion output) is provided. At least at one point in a stable resonator having optical parts (optical crystal) other than mirrors, an aperture having a circular hole with a diameter 1 to 10 times the diameter of a beam at the aperture, a slit having a width 1 to 10 times the diameter of the beam, or an aperture of an arbitrary shape having an edge is located, or a knife edge having an linear or curved edge is Located so that the nearest distance between the edge and the beam is 1 to 10 times the radius of the beam from the center of the beam.
    • 在具有除反射镜之外的至少一个光学部件的光学系统中,例如,使用外部谐振器的波长转换光学系统,能够解决由于散射物质的存在而产生横向模式的问题的光学系统,以及 提供了使用并且能够提供稳定输出(稳定的波长转换输出)的光学晶体。 至少在具有除了镜子之外的光学部件(光学晶体)的稳定谐振器中的一个点处,具有直径在光阑的光束直径的1至10倍的圆形孔的孔,具有宽度1至10的狭缝 或者具有边缘的任意形状的孔的位置,或者具有线性或弯曲边缘的刀刃被定位成使得边缘和梁之间的最近距离为半径的1至10倍 的梁的中心。
    • 110. 发明授权
    • Monolithic ceramic capacitor
    • 单片陶瓷电容器
    • US5835340A
    • 1998-11-10
    • US895846
    • 1997-07-18
    • Hiroyuki WadaHarunobu SanoNorihiko Sakamoto
    • Hiroyuki WadaHarunobu SanoNorihiko Sakamoto
    • C04B35/46C04B35/468H01B3/12H01G4/12H01G4/30H01G4/06H01G2/20H01G4/20H01G4/228
    • H01G4/1227C04B35/468
    • A monolithic ceramic capacitor having a plurality of dielectric ceramic layers, internal electrodes, and external electrodes electrically connected to the internal electrode, wherein the dielectric ceramic layers comprise (a) barium titanate having an alkali metal oxide impurity content of not more than about 0.02% by weight, (b) scandium oxide and/or yttrium oxide, (c) gadolinium oxide, terbium oxide and/or dysprosium oxide, (d) manganese oxide, (e) cobalt oxide, and (f) nickel oxide, and is a material containing (1) 100 mols represented by the compositional formula: (1-.alpha.-.beta.){BaO}.sub.m .cndot.TiO.sub.2 +.alpha.{(1-x)M.sub.2 O.sub.3 +xRe.sub.2 O.sub.3 }+.beta.(Mn.sub.1-y-z Ni.sub.y Co.sub.z)O wherein M.sub.2 O.sub.3 represents the above-mentioned (b); Re.sub.2 O.sub.3 represents the above-mentioned (c); 0.0025.ltoreq..beta..ltoreq.0.05; .beta./.alpha..ltoreq.4; 0
    • 一种具有多个介电陶瓷层,内部电极和与内部电极电连接的外部电极的叠层陶瓷电容器,其中介电陶瓷层包括(a)碱金属氧化物杂质含量不大于约0.02%的钛酸钡, (b)氧化钪和/或氧化钇,(c)氧化钆,氧化铽和/或氧化镝,(d)氧化锰,(e)氧化钴和(f)氧化镍, 含有(1)以组成式表示的100摩尔的材料:(1-α-β){BaO} m.TiO 2 +α{(1-x)M 2 O 3 + xRe 2 O 3} +β(Mn 1-y-z Ni y Co z) 上述(b); Re2O3代表上述(c); 0.0025