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    • 72. 发明授权
    • Laser oscillating apparatus and method of driving laser beam source
    • 激光振荡装置及激光束源的驱动方法
    • US5825798A
    • 1998-10-20
    • US650730
    • 1996-05-20
    • Masayuki MomiuchiHiroshi KoizumiMasahiro OhishiYoshiaki GotoFumio Ohtomo
    • Masayuki MomiuchiHiroshi KoizumiMasahiro OhishiYoshiaki GotoFumio Ohtomo
    • H01S3/0941H01S3/102H01S3/109H01S5/062H01S3/091H01S3/094
    • H01S3/09415H01S3/102H01S3/109H01S5/06216
    • The present invention relates to a laser oscillating apparatus using a semiconductor laser or the like and a method of driving a laser beam source. The present invention relates particularly to a laser oscillating apparatus or the like having a nonlinear optical medium for generating a second harmonic and capable of by-pulse driving a laser beam source with high efficiency. In the laser oscillating apparatus, a optical resonator is composed of at least a laser crystal and an output mirror. The nonlinear optical medium for generating the second harmonic is inserted into the optical resonator. The laser beam source can effect pumping on the optical resonator so that the period T of a drive pulse produced from a pulse driving means satisfies a relation in .tau..sub.FL >T-.tau. with respect to .tau..sub.FL (fluorescence lifetime). Further, a first pulse can drive the laser beam source with the degree of not leading to the emission of a laser beam and a second pulse can drive the laser beam source so that the laser beam source produces the laser beam.
    • 本发明涉及使用半导体激光器等的激光振荡装置和驱动激光束源的方法。 本发明具体涉及具有用于产生二次谐波的非线性光学介质的激光振荡装置等,能够以高效率对激光束源进行逐脉冲驱动。 在激光振荡装置中,光谐振器至少由激光晶体和输出镜构成。 用于产生二次谐波的非线性光学介质被插入到光学谐振器中。 激光束源可以在光谐振器上实现泵浦,使得从脉冲驱动装置产生的驱动脉冲的周期T满足关于tau FL(荧光寿命)的τFL> T-tau的关系。 此外,第一脉冲可以以不导致激光束的发射的程度驱动激光束源,并且第二脉冲可以驱动激光束源,使得激光束源产生激光束。
    • 73. 发明授权
    • Television receiver with stereo speakers
    • 带立体声扬声器的电视接收机
    • US5504820A
    • 1996-04-02
    • US396357
    • 1995-02-28
    • Hiroshi Koizumi
    • Hiroshi Koizumi
    • H04N5/64H04R1/02H04R1/26H04R5/02H04R5/00
    • H04R5/02
    • In a television receiver having a pair of speakers provided at the right and left sides of its image display portion, respectively, for reproducing the stereo audio signal by the speakers, one of the pair of speakers is constituted by the speaker unit for reproducing the middle and high frequency range of the stereo audio signal, and the other of the pair of speakers is constituted by the speaker unit for reproducing all frequency range of the stereo audio signal which is superior in reproduction characteristics of the low frequency range audio signal than that of the speaker unit for reproducing the middle and high frequency range.
    • 在具有分别设置在其图像显示部分的左侧和右侧的一对扬声器的电视接收机中,用于由扬声器再现立体声音频信号,该扬声器之一由扬声器单元构成,用于再现中间 和立体声音频信号的高频范围,而另一对扬声器由用于再现低频范围音频信号的再现特性优于立体声音频信号的所有频率范围的扬声器单元构成, 用于再现中频和高频范围的扬声器单元。