公开(公告)号：US20050220164A1

公开(公告)日：2005-10-06

申请号：US11094591

申请日：2005-03-31

申请人： Atsushi Mori ,  Akira Egawa

发明人： Atsushi Mori ,  Akira Egawa

IPC分类号： H01S3/00 ,  H01S3/081 ,  H01S3/08

CPC分类号： H01S3/081 ,  H01S3/005

摘要： A laser oscillator that can suppress astigmatism and achieve an axially symmetric laser beam output profile even when a spherical mirror is inserted between an output mirror and a rear mirror. Turning mirrors (plane mirrors) and spherical mirrors are arranged between the output mirror and the rear mirror so as to provide a zigzag round-trip optical path where the optical axes cross in the same plane. This configuration achieves the same effect as if lenses were arranged between the ends of a very long resonator, and the light-gathering performance of the laser beam may be controlled by the output mirror, the rear mirror and the curvatures of the respective turning mirrors. The positions and orientations of the spherical mirrors are determined so that the planes formed by the optical axis of the incident laser beam and the optical axis of the reflected laser beam on the respective spherical mirrors are perpendicular to each other, thereby offsetting the astigmatism and preventing the axial symmetry of the output laser beam profile from degrading. The angle of incidence of the laser beam axis on each spherical mirror may be set to 22.5 degrees or larger. Further, the turning mirrors may be replaced by a slab crystal.

摘要翻译： 激光振荡器，即使在将球面镜插入输出反射镜和后反射镜之间时也能抑制散光并实现轴向对称的激光束输出轮廓。 转向镜（平面镜）和球面镜布置在输出反射镜和后反射镜之间，以便提供光轴在同一平面上交叉的之字形往返光路。 这种结构实现了相同的效果，如果透镜布置在非常长的谐振器的端部之间，并且激光束的聚光性能可以由输出反射镜，后反射镜和各个转向镜的曲率来控制。 确定球面镜的位置和取向，使得由入射激光束的光轴和反射激光束的光轴在各个球面镜上形成的平面彼此垂直，从而抵消散光并防止 输出激光束轮廓的轴向对称性降低。 每个球面镜上的激光束轴的入射角可设定为22.5度或更大。 此外，转向镜可以由板状晶体代替。

公开(公告)号：US20070071057A1

公开(公告)日：2007-03-29

申请号：US11533168

申请日：2006-09-19

申请人： Kazuya Ohta ,  Akira Egawa ,  Atsushi Mori

发明人： Kazuya Ohta ,  Akira Egawa ,  Atsushi Mori

IPC分类号： H01S3/22 ,  H01S3/223

CPC分类号： H01S3/036 ,  G01H1/003 ,  G01M13/045 ,  H01S3/073

摘要： A blower (10) includes: at least two or at least three acoustic sensors or vibration sensors (31a to 31c) attached to a casing (12); and a position specifying means (34) for specifying a position of a source of abnormal sound or abnormal vibration from signals detected by the acoustic sensors or vibration sensors. When the position of the abnormal portion is specified in this way, a proper countermeasure can be taken quickly. Further, the blower (10) preferably includes an alarm output judging means (35) for judging whether or not an alarm should be outputted according to the position of the source of the abnormal sound or abnormal vibration specified by the position specifying means. A laser oscillator (100) having the blower (10) is also provided.

摘要翻译： 鼓风机（10）包括：附接到壳体（12）的至少两个或至少三个声学传感器或振动传感器（31a至31c）; 以及位置指定装置，用于根据由声学传感器或振动传感器检测到的信号来指定异常声音或异常振动源的位置。 当以这种方式指定异常部分的位置时，可以迅速采取适当的对策。 此外，鼓风机10优选地包括报警输出判断装置，用于根据由位置指定装置指定的异常声音或异常振动的源的位置来判断是否应该输出报警。 还提供了具有鼓风机（10）的激光振荡器（100）。

公开(公告)号：US07348517B2

公开(公告)日：2008-03-25

申请号：US11197259

申请日：2005-08-05

申请人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

发明人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

IPC分类号： B23K26/06 ,  B23K26/38

CPC分类号： B23K26/38 ,  B23K26/06 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/14

摘要： A laser cutting apparatus capable of properly cutting a workpiece having a large thickness with a laser beam. The laser cutting apparatus includes a gas laser oscillator; and an optical system including a collective lens and transmitting and collecting a laser beam generated in the gas laser oscillator to irradiate a workpiece with the laser beam. An index M2 for evaluating a beam quality of the laser beam emerging from the optical system, with which the workpiece is irradiated, is in a range of 2.8 to 4.5; while the index M2 is defined by a formula: M2=π×(dm)2/(4×λ×Zr); in which λ is a wavelength of the laser beam; dm is a minimum beam diameter of the laser beam in a predetermined optical-path range including a focal point of the collective lens; and Zr is a distance between a first position on an optical axis, at which the minimum beam diameter dm is established, and a second position on the optical axis, at which a beam diameter “21/2×dm” is established, in the laser beam in the predetermined optical-path range.

摘要翻译： 一种能够用激光束适当地切割厚度大的工件的激光切割装置。 激光切割装置包括气体激光振荡器; 以及包括集体透镜的光学系统，并且传送和收集在气体激光振荡器中产生的激光束以用激光束照射工件。 用于评估从工件被照射的光学系统出射的激光束的光束质量的指标M 2在2.8至4.5的范围内; 而索引M 2由下式定义：M 2 = pix（dm）2 /（4xlambdaxZr）; 其中λ是激光束的波长; dm是包括集体透镜的焦点的预定光路范围内的激光束的最小光束直径; 并且Zr是在建立最小光束直径dm的光轴上的第一位置与光轴上的光束直径“2”1/2“之间的距离， xdm“在预定光路范围内的激光束中建立。

公开(公告)号：US20060114959A1

公开(公告)日：2006-06-01

申请号：US11285284

申请日：2005-11-23

申请人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

发明人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

IPC分类号： H01S3/03

CPC分类号： H01S3/09705 ,  H01S3/036 ,  H01S3/073

摘要： A gas laser oscillator (10) provided with voltage detecting means (4a to 4d) for detecting the voltage of each of a plurality of discharge tube segments (6a to 6d) of a discharge tube before start of discharge and a discharge tube segment start judging means (1) for judging if each of the plurality of discharge tube segments (6a to 6d) has started based on the voltage of the discharge tube segments (6a to 6d) detected by the voltage detecting means (4a to 4d), wherein the discharge tube segment start judging means (1) allows all of the plurality of discharge tube segments (6a to 6d) to start only when the voltages of all of the discharge tube segments (6a to 6d) of the plurality of discharge tube segments are smaller than a predetermined voltage (Vb) is provided. Due to this, it is possible to judge an abnormality in the laser gas before the start of discharge without any work on the part of the operator and thereby prevent the discharge tube from being damaged.

摘要翻译： 一种气体激光振荡器（10），其设置有用于检测在放电开始和放电之前放电管的多个放电管段（6a至6d）中的每一个的电压的电压检测装置（4a至4d） 管段开始判断装置（1），用于基于由电压检测装置检测的放电管段（6a至6d）的电压来判断多个放电管段（6a至6d）中的每一个是否已经开始 （4a至4d），其中放电管段开始判断装置（1）允许所有多个放电管段（6a至6d）中的所有放电管段（6a至6d）的所有放电管段 一个至6d）的多个放电管段都小于预定电压（Vb）。 由此，可以在开始放电之前判断激光气体在操作者的任何工作中的异常，从而防止放电管的损坏。

公开(公告)号：US20060114772A1

公开(公告)日：2006-06-01

申请号：US11289440

申请日：2005-11-30

申请人： Akira Egawa ,  Atsushi Mori

发明人： Akira Egawa ,  Atsushi Mori

IPC分类号： G11B7/00

CPC分类号： G02B27/0927 ,  B23K26/0734 ,  G02B5/001 ,  G02B27/0944 ,  G02B27/095

摘要： A laser processing device having an effect similar to that obtained by changing a focal length of a condensing lens. A part of a laser beam entering into a flat surface portion of the condensing lens is not condensed and radiated on a condensing point on a workpiece as a parallel beam. This part of the laser beam serves as an auxiliary beam in laser processing. On the other hand, the other part of the laser beam entering into a curved surface portion is condensed and radiated on or near the circumference of the condensing point.

摘要翻译： 具有与通过改变聚光透镜的焦距获得的效果相似的效果的激光加工装置。 入射到聚光透镜的平坦表面部分的激光束的一部分不会被冷凝并辐射在作为平行光束的工件上的聚光点上。 激光束的这一部分在激光加工中用作辅助光束。 另一方面，进入弯曲表面部分的激光束的另一部分被冷凝并辐射在聚光点的圆周上或附近。

公开(公告)号：US20060044981A1

公开(公告)日：2006-03-02

申请号：US11197259

申请日：2005-08-05

申请人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

发明人： Akira Egawa ,  Minoru Ando ,  Atsushi Mori

IPC分类号： G11B7/00

CPC分类号： B23K26/38 ,  B23K26/06 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B23K26/14

摘要： A laser cutting apparatus capable of properly cutting a workpiece having a large thickness with a laser beam. The laser cutting apparatus includes a gas laser oscillator; and an optical system including a collective lens and transmitting and collecting a laser beam generated in the gas laser oscillator to irradiate a workpiece with the laser beam. An index M2 for evaluating a beam quality of the laser beam emerging from the optical system, with which the workpiece is irradiated, is in a range of 2.8 to 4.5; while the index M2 is defined by a formula: M2=π×(dm)2/(4×λ×Zr); in which λ is a wavelength of the laser beam; dm is a minimum beam diameter of the laser beam in a predetermined optical-path range including a focal point of the collective lens; and Zr is a distance between a first position on an optical axis, at which the minimum beam diameter dm is established, and a second position on the optical axis, at which a beam diameter “21/2×dm” is established, in the laser beam in the predetermined optical-path range.

摘要翻译： 一种能够用激光束适当地切割厚度大的工件的激光切割装置。 激光切割装置包括气体激光振荡器; 以及包括集体透镜的光学系统，并且传送和收集在气体激光振荡器中产生的激光束以用激光束照射工件。 用于评估从工件被照射的光学系统出射的激光束的光束质量的指标M 2在2.8至4.5的范围内; 而索引M 2由下式定义：M 2 = pix（dm）2 /（4xlambdaxZr）; 其中λ是激光束的波长; dm是包括集体透镜的焦点的预定光路范围内的激光束的最小光束直径; 并且Zr是在建立最小光束直径dm的光轴上的第一位置与光轴上的光束直径“2”1/2“之间的距离， xdm“在预定光路范围内的激光束中建立。

公开(公告)号：US08540374B2

公开(公告)日：2013-09-24

申请号：US13072045

申请日：2011-03-25

申请人： Akira Egawa ,  Yasushi Tateno ,  Fumihide Sasaki

发明人： Akira Egawa ,  Yasushi Tateno ,  Fumihide Sasaki

IPC分类号： G03B21/16

CPC分类号： G03B21/16

摘要： A projector includes: an optical modulation device configured to modulate an incident luminous flux; a projection optical device configured to project the luminous flux modulated by the optical modulation device; and a cooling device configured to cool the optical modulation device, wherein the cooling device includes a cooling fan, and a duct having a discharge portion that causes the air discharged from the cooling fan to circulate in a direction approximately parallel to the optical axis, and discharges it to a lateral side of the optical modulation device, and the duct is disposed in a state that, when the projection optical device and discharge portion are cut by a plane perpendicular to the optical axis, the height position of a first center between the upper end and lower end of the cross-section of the discharge portion and that of the optical axis differ from one another.

摘要翻译： 投影机包括：配置成调制入射光通量的光调制装置; 投影光学装置，被配置为投影由所述光调制装置调制的光束; 以及冷却装置，其被配置为冷却所述光调制装置，其中，所述冷却装置包括冷却风扇和具有排出部的管道，所述排出部使得从所述冷却风扇排出的空气在大致平行于所述光轴的方向上循环， 将其放电到光调制装置的侧面，并且将导管设置在这样的状态，即当投影光学装置和放电部分被垂直于光轴的平面切割时，第一中心的高度位置 排出部分的横截面的上端和下端与光轴的横截面的上端和下端彼此不同。

公开(公告)号：US08360584B2

公开(公告)日：2013-01-29

申请号：US12832318

申请日：2010-07-08

申请人： Akira Egawa ,  Kaname Nagatani ,  Kunihiko Takagi

发明人： Akira Egawa ,  Kaname Nagatani ,  Kunihiko Takagi

IPC分类号： G03B21/16

CPC分类号： G03B21/16 ,  H04N9/3144

摘要： A projector includes: an optical system includes a light source, a light modulation element for modulating light emitted from the light source to form an optical image, and a projection lens for projecting the optical image, the optical system is structured such that an illumination optical axis of the light source and a projection optical axis of the projection lens cross each other substantially at right angles in the plan view; and a cooling fan configured to the light modulation element, and has a rotation axis crossing each other substantially at right angles with a discharge direction where a cooling air is discharged, the cooling fan is disposed in the vicinity of the projection lens and on the side where the light source is provided such that the rotation axis extends in the thickness direction of the projector.

摘要翻译： 投影机包括：光学系统，包括光源，用于调制从光源发射的光以形成光学图像的光调制元件和用于投影光学图像的投影透镜，光学系统被构造成使得照明光学 光源的轴线和投影透镜的投影光轴在平面图中基本成直角相交; 以及冷却风扇，其配置于所述光调制元件，并且具有与放出冷却空气的排出方向大致成直角相交的旋转轴，所述冷却风扇配置在所述投影透镜的附近和所述侧面 其中光源被设置成使得旋转轴线在投影仪的厚度方向上延伸。

公开(公告)号：US20120113313A1

公开(公告)日：2012-05-10

申请号：US13319888

申请日：2010-07-22

申请人： Akira Egawa

发明人： Akira Egawa

IPC分类号： H04N5/232

CPC分类号： G03B13/36 ,  G02B7/36

摘要： An image pickup apparatus that can efficiently obtain an offset between focal positions detected in phase difference-based focus detection and contrast-based focus detection by using results of phase difference-based focus detection at multiple points. Focal positions in a plurality of regions based on a pair of image signals obtained from different pupils are obtained. A focal position for a focus lens at which a contrast of image signals for image pickup is at a peak is detected. A target focal position is determined from the plurality of focal positions. When another focal position is present between a present focal position and the target focal position, an offset between a focal position of the focus lens at which the contrast detected at the other focal position while the focus lens is moving is at a peak and the other focal position is calculated.

摘要翻译： 通过使用多个点处的基于相位差的焦点检测的结果，可以有效地获得基于相位差的焦点检测和基于对比度的对焦检测之间的焦点位置之间的偏移的图像拾取装置。 获得基于从不同瞳孔获得的一对图像信号的多个区域中的焦点位置。 检测用于图像拾取的图像信号的对比度处于峰值的聚焦透镜的焦点位置。 从多个焦点位置确定目标焦点位置。 当在当前焦点位置和目标焦点位置之间存在另一个焦点位置时，在聚焦透镜移动时在另一个焦点位置处检测到的对比度的焦点透镜的焦点位置之间的偏移处于峰值处，另一个 计算焦点位置。

公开(公告)号：US08085823B2

公开(公告)日：2011-12-27

申请号：US12496816

申请日：2009-07-02

申请人： Akira Egawa

发明人： Akira Egawa

IPC分类号： H01S3/10

CPC分类号： H01S5/4025 ,  G02F1/37 ,  G02F2201/17 ,  H01S5/005 ,  H01S5/0092 ,  H04N9/3129

摘要： A laser source device includes: a light emission unit which emits laser beam having first wavelength; a first mirror which selectively reflects S-polarized light contained in the first wavelength laser beam emitted from the light emission unit in a direction different from the direction toward the light emission unit and transmits second wavelength laser beam; a second mirror which receives laser beam reflected by the first mirror and reflects laser beam having first wavelength and contained in the received laser beam toward the first mirror; and a wavelength conversion element disposed between the first mirror and the second mirror and converts at least a part of S-polarized light contained in the received first wavelength laser beam into laser beam having second wavelength.

摘要翻译： 激光源装置包括：发射具有第一波长的激光束的发光单元; 第一反射镜，其选择性地反射从与所述发光单元的方向不同的方向从所述发光单元发射的所述第一波长激光束中包含的S偏振光，并透射第二波长激光束; 第二反射镜，其接收由第一反射镜反射的激光束并且将具有第一波长的激光束反射并且包含在接收的激光束中朝向第一反射镜; 以及波长转换元件，其设置在所述第一反射镜和所述第二反射镜之间，并将所接收的第一波长激光束中包含的S偏振光的至少一部分转换成具有第二波长的激光束。