公开(公告)号：US20080180934A1

公开(公告)日：2008-07-31

申请号：US12015283

申请日：2008-01-16

Applicant: Michio Oka ,  Shinichiro Tajiri

Inventor： Michio Oka ,  Shinichiro Tajiri

IPC: F21V13/02

CPC classification number: G02B19/0057 ,  G02B19/0014 ,  G02B27/0927 ,  G02B27/0966 ,  G02B27/285 ,  H01S3/005 ,  H01S5/005 ,  H01S5/4012 ,  H01S5/4025 ,  H01S5/4031

Abstract: A laser light source unit is provided, including a light source, a wavefront dividing unit, a wavefront synthesizing unit, and a polarization conversion unit. The wavefront dividing unit includes at least a plurality of dividing regions which are capable of dividing a first wavefront of light emitted from the light source to form a plurality of light beams. The wavefront synthesizing unit is configured to synthesize the first wavefront of light divided by the wavefront dividing unit to form a second wavefront and lead the second wavefront to a subject to be illuminated, and the polarization conversion unit is configured to rotate the plane of polarization of a portion of the plurality of light beams. In addition, the polarization conversion unit is provided with at least a plurality of wave plates each having the direction of optical axis different each other.

Abstract translation: 提供一种激光光源单元，包括光源，波前分割单元，波阵面合成单元和偏振转换单元。 波前分割单元包括至少多个分割区域，其能够划分从光源发射的光的第一波前，以形成多个光束。 波阵面合成单元被配置为合成由波前分割单元分割的光的第一波前，以形成第二波前，并将第二波前引导到被照明的对象，并且偏振转换单元被配置为使偏振平面的 多个光束的一部分。 此外，偏振转换单元设置有至少多个具有光轴方向彼此不同的波片。

公开(公告)号：US06404786B1

公开(公告)日：2002-06-11

申请号：US09543136

申请日：2000-04-05

Applicant: Kenji Kondo ,  Michio Oka ,  Hiroyuki Wada

Inventor： Kenji Kondo ,  Michio Oka ,  Hiroyuki Wada

IPC: H01S310

CPC classification number: G02F1/3501 ,  G02F2001/3505

Abstract: 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.

Abstract translation: 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 。

公开(公告)号：US06403966B1

公开(公告)日：2002-06-11

申请号：US09339851

申请日：1999-06-25

Applicant: Michio Oka

Inventor： Michio Oka

IPC: G01J142

CPC classification number: G02B21/16

Abstract: A measurement method and a measurement apparatus for measuring the structure of a micro-structure or the structure along the depth of an object for measurement. The laser light from a solid-state laser light source is subjected to wavelength conversion to generate the ultraviolet laser light, and measurement is made of the object for measurement by heterodyne detection or homodyne detection employing the ultraviolet laser light. This enables measurement of a structure of a micro-structure. Alternatively, the laser light is split into multiple laser light beams and frequency shifted so that the laser light beams will be of different frequencies. The laser light beams are imaged at respective different focal point positions to perform heterodyne detection. The resulting heterodyne signals are separated into respective frequency bands and measurement is made of the structure of the object for measurement in association with the respective imaging points. This enables measurement of the structure of the object for measurement in the direction along its depth.

Abstract translation: 一种测量方法和测量装置，用于测量沿着测量对象的深度的微结构或结构的结构。 对来自固态激光光源的激光进行波长转换以产生紫外激光，并且通过使用紫外激光的外差检测或零差检测来测量测量对象。 这使得能够测量微结构的结构。 或者，激光被分成多个激光束并且频移，使得激光束将具有不同的频率。 激光束在各个不同的焦点位置成像，以进行外差检测。 所得到的外差信号被分离成相应的频带，并且与各个成像点相关联地测量用于测量的对象的结构。 这使得能够沿着其深度的方向测量被测物体的结构。

公开(公告)号：US06181461B2

公开(公告)日：2001-01-30

申请号：US09162105

申请日：1998-09-28

Applicant: Hiroyuki Wada ,  Hisashi Masuda ,  Kenji Kondo ,  Michio Oka ,  Yuushi Kaneda

Inventor： Hiroyuki Wada ,  Hisashi Masuda ,  Kenji Kondo ,  Michio Oka ,  Yuushi Kaneda

IPC: G02F135

CPC classification number: G02F1/37 ,  G02F2001/3542

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5930283A

公开(公告)日：1999-07-27

申请号：US869478

申请日：1997-06-05

Applicant: Yutaka Imai ,  Michio Oka

Inventor： Yutaka Imai ,  Michio Oka

IPC: H01S3/083 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/23

CPC classification number: H01S3/083 ,  H01S3/07 ,  H01S3/0813 ,  H01S3/0816 ,  H01S3/09415 ,  H01S3/10092

Abstract: The laser beam generating apparatus (light source apparatus) comprising a laser oscillator structured as a ring resonator is provided with a plurality of excitation light sources and a plurality of solid state laser active media excited by these excitation light sources respectively, and these solid state laser active media are disposed separately each other on the optical path in the ring resonator. A high power laser beam is obtained stably and efficiently.

Abstract translation: 包括构成环形谐振器的激光振荡器的激光束发生装置（光源装置）分别设置有多个激发光源和由这些激发光源激发的多个固态激光活性物质，这些固态激光器 活性介质在环形谐振器的光路上分开设置。 获得稳定高效的高功率激光束。

公开(公告)号：US5349603A

公开(公告)日：1994-09-20

申请号：US976276

申请日：1992-11-13

Applicant: Yushi Kaneda ,  Michio Oka

Inventor： Yushi Kaneda ,  Michio Oka

IPC: H01S3/08 ,  H01S3/094 ,  H01S3/139 ,  H01S3/16

CPC classification number: H01S3/08 ,  H01S3/08072 ,  H01S3/09408 ,  H01S3/09415

Abstract: A solid-state laser resonator includes a pair of reflectors 4, 5, a bar-like laser medium 6, a plurality of point laser sources 1, 2 and resonator including a plurality of resonator portions. At least one of the paired reflectors 4, 5 has a curved-surface mirror. The laser medium 6 is interposed between the paired reflectors 4, 5. Laser beams 8 emitted from the point laser sources 1, 2 are passed through one of the paired reflectors 4, 5 and irradiated as pumping lights on one end face of the laser medium 6. The resonators include the pair of reflectors, the laser sources 1, 2 and a plurality of thermal lenses. The thermal lenses are formed within the laser medium 6. The resonators produce output laser beam to produce from the other end face of the laser medium 6 through other one of the reflector 5.

Abstract translation: 固体激光谐振器包括一对反射器4,5，棒状激光介质6，多个点激光源1,2和包括多个谐振器部分的谐振器。 配对反射器4,5中的至少一个具有曲面反射镜。 激光介质6插入在成对反射器4,5之间。从点激光源1,2发射的激光束8通过成对的反射器4,5中的一个，并在激光介质的一个端面上作为泵浦光照射 谐振器包括一对反射器，激光源1,2和多个热透镜。 热透镜形成在激光介质6内。谐振器产生输出激光束，以通过反射器5中的另一个从激光介质6的另一端面产生。

公开(公告)号：US20120307620A1

公开(公告)日：2012-12-06

申请号：US13464539

申请日：2012-05-04

Applicant: Michio Oka ,  Hiroshi Yoshida ,  Kenji Tanaka

Inventor： Michio Oka ,  Hiroshi Yoshida ,  Kenji Tanaka

IPC: G11B7/135 ,  G02B3/02 ,  H01S5/06

CPC classification number: G11B7/126 ,  G11B7/127 ,  G11B7/1356 ,  G11B7/1372 ,  G11B7/1378 ,  H01S5/0657 ,  H01S5/1064 ,  H01S5/50

Abstract: A light source device configured as a master oscillator power amplifier includes a mode locked laser unit having an external resonator and a semiconductor optical amplifier that amplifies and modulates laser light emitted from the mode locked laser unit. The width in a lateral direction of a waveguide on an incident side of the semiconductor optical amplifier is set so that a horizontal lateral mode of the waveguide on the incident side of the semiconductor optical amplifier becomes multiple modes, and a magnification conversion unit that converts a magnification of incident light from the mode locked laser unit to the semiconductor optical amplifier is disposed so that a basic mode is selectively excited in optical coupling on the incident side of the semiconductor optical amplifier.

Abstract translation: 配置为主振荡器功率放大器的光源装置包括具有外部谐振器的模式锁定激光器单元和放大并调制从锁模激光器单元发射的激光的半导体光放大器。 在半导体光放大器的入射侧的波导的横向的宽度被设定为使得半导体光放大器的入射侧的波导的水平横向模式变为多个模式，并且将倍率转换单元 从模式锁定激光单元到半导体光放大器的入射光的放大率被设置为使得在半导体光放大器的入射侧的光耦合中选择性地激发基本模式。

公开(公告)号：US07701986B2

公开(公告)日：2010-04-20

申请号：US12002623

申请日：2007-12-18

Applicant: Kaoru Kimura ,  Michio Oka

Inventor： Kaoru Kimura ,  Michio Oka

IPC: H01S3/10 ,  H01S3/08

CPC classification number: H01S3/109 ,  H01S3/08036 ,  H01S3/08054 ,  H01S3/0815 ,  H01S3/0816 ,  H01S3/094069 ,  H01S3/0941 ,  H01S3/09415

Abstract: Disclosed is a laser light source apparatus. The laser light source apparatus includes a pumping light source and a pair of resonator mirrors. In the laser light source apparatus, the pumping light source includes at least a laser medium and a wavelength conversion element, and the laser medium is pumped by light having a multi-transversal mode pattern and the wavelength conversion element are irradiated with a line beam of fundamental wave obtained by the oscillation by the laser medium to output a line beam of converted wave. The laser light source apparatus further includes at least one reflector bending light path is provided in the resonator such that a longitudinal direction of the line beam of fundamental wave is approximately perpendicular to an incident plane of the reflection unit.

Abstract translation: 公开了一种激光光源装置。 激光光源装置包括一个泵浦光源和一对谐振镜。 在激光光源装置中，所述泵浦光源至少包括激光介质和波长转换元件，并且所述激光介质由具有多横模式图案的光泵浦，并且所述波长转换元件用线 由激光介质振荡得到的基波输出转换波束的波束。 激光光源装置还包括在谐振器中设置至少一个反射器弯曲光路，使得基波线束的纵向方向大致垂直于反射单元的入射面。

公开(公告)号：US07106315B2

公开(公告)日：2006-09-12

申请号：US10124293

申请日：2002-04-17

Applicant: Suehiro Nakamura ,  Michio Oka

Inventor： Suehiro Nakamura ,  Michio Oka

IPC: G09G5/00 ,  G09G3/32

CPC classification number: G09G3/02 ,  G06F3/147 ,  H04N9/3132 ,  H04N2005/91392

Abstract: An image display unit includes a linear display device. The linear display device is line-scanned to display a two-dimensional image. The linear display device has a video signal protection function. In the linear display device, video protection can be implemented using a very simple system for turning off some pixels. Device ID information can be embedded into a display terminal using the image display unit.

公开(公告)号：US5909456A

公开(公告)日：1999-06-01

申请号：US944457

申请日：1997-10-06

Applicant: Michio Oka

Inventor： Michio Oka

IPC: G02F1/37 ,  H01S3/08 ,  H01S3/081 ,  H01S3/098 ,  H01S3/109 ,  H01S3/131 ,  H01S3/16 ,  H01S3/10

CPC classification number: H01S3/1312 ,  H01S3/109 ,  G02F1/37 ,  H01S3/08018 ,  H01S3/08054 ,  H01S3/08072 ,  H01S3/0815 ,  H01S3/1611 ,  H01S3/1643 ,  H01S3/1665 ,  H01S3/1673

Abstract: A laser beam generator includes first and second mirrors, a laser light source, a laser medium, a non-linear optical crystal element and a birefringent element. The laser light source generates a pumping light beam. The laser medium, arranged between the first and second mirrors, is irradiated with the pumping light beam via one of the mirrors to generate a fundamental laser beam based on the pumping light beam. The non-linear optical crystal element is arranged between the first and second mirrors to generate a second harmonic laser beam under the type II phase matching as the fundamental laser beam from the laser medium is passed through it in resonant oscillation. The birefringent element has its one surface at a pumping light beam inlet side coated with a high reflectance coating and has its opposite surface parallel to it with a nonreflective coating. The birefringent element is set so that its optical axis is inclined at a predetermined azimuth angle with respect to the crystal axis of the non-linear optical crystal element. The surface of the birefringent element coated with a high reflectance coating constitutes one of the first or second mirrors.

Abstract translation: 激光束发生器包括第一和第二反射镜，激光光源，激光介质，非线性光学晶体元件和双折射元件。 激光光源产生泵浦光束。 布置在第一和第二反射镜之间的激光介质通过其中一个反射镜用泵浦光束照射，以产生基于激发光束的基本激光束。 非线性光学晶体元件布置在第一和第二反射镜之间，以在激光介质的基本激光束以共振振荡的方式通过时，在II型相位匹配下产生二次谐波激光束。 双折射元件的一个表面在泵浦光束入口侧涂覆有高反射率涂层，并且其相对表面与非反射涂层平行。 双折射元件被设置为使得其光轴相对于非线性光学晶体元件的晶轴以预定的方位角倾斜。 涂覆有高反射率涂层的双折射元件的表面构成第一或第二反射镜之一。