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    Multi quasi phase matched interactions in a non-linear crystal and method using same
    81.
    发明授权
    Multi quasi phase matched interactions in a non-linear crystal and method using same 失效
    非线性晶体中的多准相位匹配相互作用及其使用方法

    公开(公告)号：US5768302A

    公开(公告)日：1998-06-16

    申请号：US859620

    申请日：1997-05-20

    Applicant: Richard W. Wallace ,  Walter R. Bosenberg ,  Jason I. Alexander

    Inventor： Richard W. Wallace ,  Walter R. Bosenberg ,  Jason I. Alexander

    IPC: G02F1/35 ,  G02F1/39 ,  H01S3/08 ,  H01J3/10

    CPC classification number: G02F1/3532 ,  G02F1/39 ,  G02F2001/3548 ,  H01S3/08086

    Abstract: A laser system in which an intense laser beam of a predefined pumping wavelength traverses a non-linear material, such as crystalline lithium niobate, that has been impressed with one or more quasi phase matching (QPM) gratings is disclosed. Quasi phase matching compensates for the dispersion or birefringence in a non-linear material by modulating the non-linearity with the proper period such that the different wavelengths involved in the non-linear process stay in phase over a long interaction length. The first QPM grating promotes the parametric generation of a resonant signal whose wavelength is determined by the grating period. According to the invention, either a second QPM grating impressed in the same medium or a different order of the first QPM grating promotes the non-linear interaction between the resonant signal and another optical signal traversing the non-linear material. The multi-step process allows efficient generation of high power radiation in wavelength regions, such as the blue, or red, not easily accessible otherwise.

    Abstract translation: 公开了一种激光系统，其中预定的泵浦波长的激光束穿过已经被一个或多个准相位匹配（QPM）光栅照射的非线性材料，例如晶体铌酸锂。 准相位匹配通过以适当的周期调制非线性来补偿非线性材料中的色散或双折射，使得非线性过程中涉及的不同波长在长的相互作用长度上保持同相。 第一个QPM光栅促进了波长由光栅周期决定的谐振信号的参数产生。 根据本发明，施加在相同介质中的第二QPM光栅或者第一QPM光栅的不同顺序促进了谐振信号和穿过非线性材料的另一光信号之间的非线性相互作用。 多步骤过程允许在波长区域（例如蓝色或红色）中有效地产生高功率辐射，否则不容易获得。

    84.
    发明专利
    未知

    公开(公告)号：AT468601T

    公开(公告)日：2010-06-15

    申请号：AT03781059

    申请日：2003-12-30

    Applicant: CEBT CO LTD

    Inventor： KIM HO SEOB ,  AHN SEUNG JOON ,  KIM DAE WOOK -

    IPC: H01J37/06 ,  G03F9/00 ,  H01J3/02 ,  H01J3/10 ,  H01J37/067 ,  H01J37/15

    Abstract: The present invention provides a new extractor for a micro-column and an alignment method of the aperture of the extractor and an electron emitter for a micro-column. Further, the present invention provides a measuring system, a method for measuring, and an alignment method using the principle of the alignment.

    86.
    发明专利
    未知

    公开(公告)号：DE69806378T2

    公开(公告)日：2003-02-13

    申请号：DE69806378

    申请日：1998-05-11

    Applicant: PHOTOCURE ASA OSLO OSLO

    Inventor： STEEN 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.

    87.
    发明专利
    未知

    公开(公告)号：PT981824E

    公开(公告)日：2002-10-31

    申请号：PT98924676

    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.

    A device for illuminating a defined area
    88.
    发明专利
    A device for illuminating a defined area 未知

    公开(公告)号：NZ501693A

    公开(公告)日：2001-09-28

    申请号：NZ50169398

    申请日：1998-05-11

    Applicant: PHOTOCURE ASA

    Inventor： STEEN HARALD B

    IPC: A61N5/06 ,  H01J20060101 ,  H01J3/10

    Abstract: Provided is a device for irradiating a limited, defined area where uniform and intense irradiation is provided by a light source (1), such as a halogen lamp, with a concave mirror (2), from which light is directed towards one end (3) of a transparent rod (4) whose opposite end surface (6) directs the light uniformly through a lens (7) to the area which has to be irradiated. Such a device has application in the treatment of cancerous tumours and other pathological skin conditions which can be treated with light.

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