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    • 31. 发明申请
    • Wavelength conversion laser apparatus
    • 波长转换激光装置
    • US20080037599A1
    • 2008-02-14
    • US11808812
    • 2007-06-13
    • Byung Jin MaKiyoyuki Kawai
    • Byung Jin MaKiyoyuki Kawai
    • H01S3/10
    • G02F1/3544G02F1/37G02F2001/3546H01S5/005H01S5/0071H01S5/06837
    • In a wavelength conversion laser device, a laser light source emits first wavelength light. A non-linear optical crystal converts the first wavelength light into second wavelength light. A rotational driver rotates the non-linear optical crystal so as to alter an incidence angle of the first wavelength light with respect to the non-linear optical crystal. A rotational driving controller detects a portion of an output of the second wavelength light, generates a rotational control signal of the non-linear optical crystal in accordance with a change in the output, and transmits the rotational control signal to the rotational driver. A beam location maintaining mirror retroreflects the second wavelength light, outputted from the non-linear optical crystal, along a substantially same path as that of the first wavelength light. Also, an output beam distributor guides the retroreflected second wavelength light in a desired output direction.
    • 在波长转换激光器件中,激光源发射第一波长的光。 非线性光学晶体将第一波长光转换成第二波长光。 旋转驱动器旋转非线性光学晶体,以便改变第一波长光相对于非线性光学晶体的入射角。 旋转驱动控制器检测第二波长光的输出的一部分,根据输出的变化产生非线性光学晶体的旋转控制信号,并将旋转控制信号发送到旋转驱动器。 光束位置维持镜沿着与第一波长光基本相同的路径逆反射从非线性光学晶体输出的第二波长光。 此外,输出光束分配器引导回射的第二波长光在期望的输出方向上。
    • 36. 发明授权
    • Upconversion fiber laser apparatus
    • 上转换光纤激光装置
    • US06320885B1
    • 2001-11-20
    • US09389378
    • 1999-09-03
    • Kiyoyuki KawaiRitsuo YoshidaKen ItouHideaki Okano
    • Kiyoyuki KawaiRitsuo YoshidaKen ItouHideaki Okano
    • H01S330
    • H01S3/09415H01S3/07H01S3/094011H01S3/094015H01S3/094042H01S3/094092H01S3/094096H01S3/1608H01S3/1616H01S5/146
    • In an up-conversion laser using Tm, blue light having a wavelength of 450 nm and blue light having a wavelength of 480 nm are outputted simultaneously. A high output is enabled with a high efficiency, and a green up-conversion laser is also realized by a similar means. A hybrid fiber laser apparatus includes a light source which outputs light near a wavelength A, and comprises a means for reflecting light near the wavelength A, which is provided at another end of the optical fiber, thereby to form an optical resonator for the wavelength A. In this hybrid fiber laser apparatus, an up-conversion fiber is provided in the optical resonator for the wavelength A, and optical resonator structures for a wavelength B constructed by reflection means and for a wavelength B are respectively provided at two positions at both ends of the up-conversion fiber. Of the two reflection means, the reflection means in the laser diode chip side is arranged so as to achieve high reflection, and the other reflection means in the other end side is arranged so as to achieve partial reflection, thereby to obtain output light having a wavelength B from the partial reflection side.
    • 在使用Tm的上转换激光中,同时输出波长为450nm的蓝色光和波长为480nm的蓝色光。 高效率地实现了高输出,并且通过类似的方式也实现了绿色上转换激光器。 混合光纤激光装置包括输出波长A附近的光的光源,并且包括用于反射靠近波长A的光的装置,该装置设置在光纤的另一端,从而形成用于波长A的光谐振器 在该混合光纤激光装置中,在波长A的光谐振器中设置有上变频光纤,由反射装置和波长B构成的波长B的光谐振器结构分别设置在两端的两个位置 的上转换光纤。 在两个反射装置中,激光二极管芯片侧的反射装置被布置成实现高反射,并且另一端侧的另一反射装置被布置成实现部分反射,从而获得具有 来自部分反射侧的波长B.
    • 40. 发明授权
    • Television signal transmitting and receiving system
    • 电视信号发射和接收系统
    • US5012326A
    • 1991-04-30
    • US387998
    • 1989-08-01
    • Noriya SakamotoKiyoyuki KawaiSeijiro Yasuki
    • Noriya SakamotoKiyoyuki KawaiSeijiro Yasuki
    • H04N7/01H04N7/12H04N11/24
    • H04N7/127H04N11/006H04N7/012H04N7/122
    • A noninterlaced Y signal is separated into a horizontal high frequency component H and a horizontal low frequency component L by a LPF and an adder circuit at a time of interlace conversion. The component H is converted to an interlaced signal by a field repeating process comprising an interfield averaging process by an interfield averaging circuit, a field thinning out process by a field thinning out circuit and a delay process by an interlace conversion circuit. On the other hand, the component L is converted to an interlaced signal by a line thinning out process by an interlace conversion circuit. At a time of noninterlace conversion, the interlaced Y signal is separated into the components H and L by an LPF and an adder circuit. The component H is converted to a noninterlaced signal by means of an interfield interpolation process comprised of an interfield addition process by an interfield adder circuit and a field repeating process by a field repeating circuit, while the component L is converted to a noninterlaced signal by a motion-adaptive interpolation process of a noninterlace conversion circuit.
    • 在隔行转换时,通过LPF和加法器电路将非隔行Y信号分离为水平高频分量H和水平低频分量L. 通过场间均衡电路的场间平均处理,通过场稀疏电路的场稀疏处理和隔行扫描电路的延迟处理,通过场重复处理将分量H转换为隔行扫描信号。 另一方面,通过隔行转换电路的线间隔处理将分量L转换成隔行信号。 在非隔行转换时,隔行Y信号由LPF和加法器电路分离成分量H和L. 通过由场间加法器电路的场间相加处理和场重复电路的场重复处理构成的场间插值处理,将分量H转换为非隔行信号,同时将分量L转换为非隔行信号 非隔行转换电路的运动自适应插值处理。