公开(公告)号：US5928221A

公开(公告)日：1999-07-27

申请号：US971318

申请日：1997-11-17

Applicant: Michael W. Sasnett ,  R. Russel Austin

Inventor： Michael W. Sasnett ,  R. Russel Austin

IPC: A61F9/008 ,  A61F9/01 ,  A61B17/36

CPC classification number: A61F9/008 ,  A61F9/00802 ,  A61F2009/00846 ,  A61F2009/00855 ,  A61F2009/00872 ,  A61F2009/00897

Abstract: Fluence monitoring apparatus is disclosed for a system for modifying curvature of a cornea by selective laser photoablation of corneal tissue by means of a succession of pulses of laser radiation delivered to the cornea in an overlapping pattern corresponding to a desired pattern of photoablation. The system includes a scanning arrangement for directing the pulses to form the overlapping pattern. The fluence monitoring apparatus includes a beamsplitter located between the scanning arrangement and the cornea for directing a fraction of each of the pulses to a monitor plate. The monitor plate emits fluorescent light on being irradiated by each pulse-fraction. A video camera provides an electronic image of the monitor plate. Processing circuitry periodically records the electronic image, and the periodic image recordings are integrated to form a composite image representative of spatial distribution of laser fluence on the cornea.

Abstract translation: 荧光监测装置被公开用于通过用对应于期望的光消除图案的重叠图案递送到角膜的一系列激光辐射脉冲的选择性激光光切割角膜组织来修改角膜的弯曲的系统。 该系统包括用于引导脉冲以形成重叠图案的扫描装置。 注量监测装置包括位于扫描装置和角膜之间的分束器，用于将每个脉冲的一部分引导到监视器板。 监控板在每个脉冲分数照射下发射荧光。 视频摄像机提供监视器板的电子图像。 处理电路周期性地记录电子图像，并且周期性图像记录被整合以形成代表角膜上的激光注量的空间分布的合成图像。

公开(公告)号：US06287299B1

公开(公告)日：2001-09-11

申请号：US09315894

申请日：1999-05-21

Applicant: Michael W. Sasnett ,  R. Russel Austin

Inventor： Michael W. Sasnett ,  R. Russel Austin

IPC: A61F1800

CPC classification number: A61F9/008 ,  A61F9/00802 ,  A61F2009/00846 ,  A61F2009/00855 ,  A61F2009/00872 ,  A61F2009/00897

Abstract: Fluence monitoring apparatus is disclosed for a system for modifying curvature of the cornea of an eye by selective laser photoablation of corneal tissue by delivery of pulses of laser radiation to the cornea in an overlapping pattern. The system includes a scanner for directing the pulses to form the overlapping pattern, the movement of which is modified by an eye-tracker. A beamsplitter is located between the scanner and the cornea for directing a fraction of each of the pulses to a fixed monitor plate, which emits fluorescent light on being irradiated by each pulse-fraction. A video camera 100 images the monitor plate. Processing circuitry periodically records the image which includes images of pulse-fractions delivered during the period between recordings. These recordings are electronically integrated and processed to form a composite image representative of spatial distribution of laser fluence on the cornea.

Abstract translation: 公开了一种用于通过以重叠图案将激光辐射脉冲递送到角膜的角膜组织的选择性激光光切割来修改眼睛角膜曲率的系统的流量监测装置。 该系统包括用于引导脉冲以形成重叠图案的扫描器，其移动由眼睛跟踪器修改。 分束器位于扫描器和角膜之间，用于将每个脉冲的一部分引导到固定的监视器板，固定的监视器板在被每个脉冲分数照射时发射荧光。 摄像机100对监视器板进行成像。 处理电路周期性地记录包括记录期间传送的脉冲分数的图像的图像。 这些记录被电子整合并处理，以形成代表角膜上的激光注量的空间分布的复合图像。

公开(公告)号：US4760583A

公开(公告)日：1988-07-26

申请号：US42349

申请日：1987-04-24

Applicant: Michael W. Sasnett ,  Donald Bowes ,  Richard J. Saunders

Inventor： Michael W. Sasnett ,  Donald Bowes ,  Richard J. Saunders

IPC: B23K26/00 ,  B23K26/02 ,  B23K26/10 ,  H01S3/036 ,  H01S3/134 ,  H01S3/00

CPC classification number: B23K26/02 ,  B23K26/035 ,  B23K26/0884 ,  B23K26/10 ,  H01S3/036 ,  H01S3/134 ,  Y02P70/181

Abstract: An improved gas laser is disclosed. The laser has a support tube to support and to maintain the alignment of the optical resonator structure. The gas lasing medium is used within the support tube to maintain the tube at a substantially constant temperature above the ambient. Furthermore, an active temperature controller is disclosed. The temperature controller maintains the gas lasing medium in the support tube at a substantially constant temperature. An active pressure controller is also disclosed. The active pressure controller uses a pressure sensor, an electronic processor, and a motor-driven needle valve to maintain the pressure of the gas lasing medium in the laser within the desired operating pressure range. The laser can also be switched in operation from a continuous mode to a pulsing mode. An active power control system is disclosed wherein the power output of the laser, through an active feedback loop is maintained at the desired level. Because the optical resonator structure is light weight, it can be mounted on a mechanical assembly. The beam is delivered to a desired location by the mechanical assembly. Finally, a distributive lasing system comprising a centralized pump delivering the lasing medium to a plurality of remotely located optical resonator structures is disclosed.

Abstract translation: 公开了一种改进的气体激光器。 激光器具有支撑管以支撑并保持光学谐振器结构的对准。 气体激光介质用于支撑管内，以将管保持在高于环境温度的基本恒定的温度。 此外，公开了一种有源温度控制器。 温度控制器将气体激光介质在基本恒定的温度下保持在支撑管中。 还公开了一种主动压力控制器。 主动压力控制器使用压力传感器，电子处理器和电动针阀，以将激光器内的气体激光介质的压力保持在期望的工作压力范围内。 激光器也可以从连续模式切换到脉冲模式。 公开了一种有源功率控制系统，其中通过主动反馈回路将激光器的功率输出保持在期望的水平。 由于光学谐振器结构重量轻，因此可以安装在机械组件上。 梁通过机械组件输送到期望的位置。 最后，公开了一种分布式激光系统，其包括将激光介质输送到多个位于远端的光学谐振器结构的集中式泵。

公开(公告)号：US4500996A

公开(公告)日：1985-02-19

申请号：US363843

申请日：1982-03-31

Applicant: Michael W. Sasnett ,  James L. Hobart ,  Larry A. Gibson

Inventor： Michael W. Sasnett ,  James L. Hobart ,  Larry A. Gibson

IPC: H01S3/03 ,  H01S3/032 ,  H01S3/07 ,  H01S3/08 ,  H01S3/098

CPC classification number: H01S3/0805 ,  H01S3/03 ,  H01S3/076

Abstract: A high power, fundamental (TEMoo) mode gaseous laser is described having a discharge-confining bore tube which is provided with spaced-apart annular, inwardly-extending, radial projections or rings, which have inside diameters which match the fundamental mode diameter along the tube.

Abstract translation: 描述了一种高功率，基本（TEMoo）模式的气体激光器，其具有放电限制孔管，其设置有间隔开的环形向内延伸的径向突起或环，其具有与沿着 管。

公开(公告)号：US07041094B2

公开(公告)日：2006-05-09

申请号：US10687040

申请日：2003-10-16

Applicant: Kevin P. Connors ,  David A. Gollnick ,  Michael W. Sasnett

Inventor： Kevin P. Connors ,  David A. Gollnick ,  Michael W. Sasnett

IPC: A61B18/18

CPC classification number: A61B18/203 ,  A61B2018/00005 ,  A61B2018/00023 ,  A61B2018/00029 ,  A61B2018/00041 ,  A61B2018/00452 ,  A61B2018/00458 ,  A61B2018/00476

Abstract: A hair removal device (22) includes a cooling surface (34) which is used to contact the skin (6) prior to exposure to hair tissue-damaging laser light (74) passing from a radiation source (36) through a recessed window (46). The window is laterally offset from the cooling surface and is spaced apart from the cooling surface in a direction away from the patient's skin to create a gap between the window and the skin. The window preferably includes both an inner window (46) and an outer, user-replaceable window (48). The laser-pulse duration is preferably selected according to the general diameter of the hair.

Abstract translation: 脱毛装置（22）包括冷却表面（34），该冷却表面用于在暴露于从辐射源（36）通过凹入窗口（36）的毛发组织损坏的激光（74）之前接触皮肤（6） 46）。 窗口从冷却表面横向偏移并且在远离患者皮肤的方向上与冷却表面间隔开，以在窗口和皮肤之间形成间隙。 窗口优选地包括内窗（46）和外用户可替换的窗（48）。 优选根据毛发的总直径选择激光脉冲持续时间。

公开(公告)号：US5214485A

公开(公告)日：1993-05-25

申请号：US825512

申请日：1992-01-24

Applicant: Michael W. Sasnett ,  Thomas F. Johnston, Jr.

Inventor： Michael W. Sasnett ,  Thomas F. Johnston, Jr.

IPC: G01J1/42

CPC classification number: G01J1/4257

Abstract: A method and apparatus for determining the quality of a multimode laser beam (10). In the preferred embodiment, the apparatus includes a lens (32) for creating a transformed or imaged waist from the input beam. The location of the transformed beam waist and its diameter are then determined. These steps can be carried out by chopping the beam using a rotating hub (34) having apertures (36,38) for selectively passing the beam. Preferably, one of the apertures has a pair of 45.degree. knife edges (40,42). The transmission of the beam past the knife edge is monitored by a detector (30). In operation, the lens focal position is varied while the transmission of the beam past the knife edge is monitored in order to locate and measure the diameter of the transformed waist. The diameter of the beam at one other known location is measured. A processor then calculates beam quality by fitting these measurements to a mathematical model. Once the quality of the beam is calculated, the location of the original beam waist and its diameter can be derived. Once all of the beam parameters are derived, the propagation characteristics of the beam can be predicted.

Abstract translation: 一种用于确定多模激光束（10）的质量的方法和装置。 在优选实施例中，该装置包括用于从输入光束产生变形或成像的腰部的透镜（32）。 然后确定变形的束腰的位置及其直径。 这些步骤可以通过使用具有用于选择性地通过光束的孔（36,38）的旋转毂（34）斩波来进行。 优选地，一个孔具有一对45°刀刃（40,42）。 通过检测器（30）监测光束通过刀刃的透射。 在操作中，透镜焦点位置变化，同时监测光束穿过刀刃的透射，以定位和测量变形腰部的直径。 测量另一个已知位置处的梁的直径。 然后，处理器通过将这些测量拟合到数学模型来计算光束质量。 一旦计算了光束的质量，就可以得出原始光束腰部的位置及其直径。 一旦导出了所有的光束参数，就可以预测光束的传播特性。

公开(公告)号：US5023886A

公开(公告)日：1991-06-11

申请号：US278665

申请日：1988-12-01

Applicant: James L. Hobart ,  Michael W. Sasnett ,  Wayne S. Mefferd ,  Peter N. Allen

Inventor： James L. Hobart ,  Michael W. Sasnett ,  Wayne S. Mefferd ,  Peter N. Allen

IPC: H01S3/08 ,  B23K26/06 ,  G02B27/09 ,  H01S3/07 ,  H01S3/081

CPC classification number: B23K26/0643 ,  B23K26/06 ,  B23K26/0665 ,  G02B27/09 ,  H01S3/076 ,  H01S3/081 ,  H01S3/08072

Abstract: A laser system employing one or more mirror sets having substantially astigmatism-free focusing power sufficient to maintain a desired laser beam diameter, for example, to compensate for thermally-induced distributed lensing. In one class of preferred embodiments, the invention is a high power gas laser system having a folded optical cavity with a periodic intracavity refocusing means to compensate for distributed negative thermal lensing in the hot plasma that comprises the active medium, and thus maintain a substantially constant beam diameter throughout the optical cavity. The periodic intracavity refocusing means preferably includes a corner mirror set (including at least one curved mirror and at least one other mirror) at each corner of the folded optical cavity. In one preferred embodiment, each corner mirror set is a mirror pair including a spherical mirror and cylindrical mirror. In another preferred embodiment, each corner mirror set comprises three mirrors (including three spherical mirrors, or two sperical mirrors and a planar mirror). In another class of preferred embodiments, the inventive focusing mirror sets are not included within the optical cavity of a high power laser, but instead, one or more such focusing mirror sets are included within the output beam delivery optical components of a high-power laser. For example, one of the inventive focusing mirror sets may replace a conventional lens to direct the output beam of a high power laser system along a desired path and maintain a desired beam diameter.

公开(公告)号：US4156208A

公开(公告)日：1979-05-22

申请号：US793520

申请日：1977-05-04

Applicant: Michael W. Sasnett

Inventor： Michael W. Sasnett

IPC: H01S3/0971 ,  H01S3/0979 ,  H01S3/097

CPC classification number: H01S3/09713 ,  H01S3/0979

Abstract: A starter element for a high power gas transport laser having cathode and anode electrodes connected across a constant current DC power supply comprises a wire-like conductor connected in parallel with the cathode to the negative terminal of the power supply and extending between the cathode and anode parallel to the gas flow transversely of and spaced closely to the middle of the cathode. The free end of the starter element extends approximately 1 cm. beyond the downstream edge of the cathode and, when the output potential of the DC power supply is applied, causes a breakdown of the gas due to the high field strength at the starter end, producing an electrical discharge between that end and the central portion of the cathode. This induces the main electric discharge between the cathode and anode. In a laser having two or more sets of cathode-anode electrodes, a starter element for each cathode is connected to the power supply in parallel with the other starter elements through a series-connected resistor and a diode which electrically isolate the starter elements from each other.

Abstract translation: 用于具有连接在恒定电流DC电源上的阴极和阳极电极的高功率气体输送激光器的起动元件包括与阴极并联连接到电源的负极并在阴极和阳极之间延伸的线状导体 平行于阴极的中部横向并间隔开的气体流。 起动元件的自由端延伸约1厘米。 超过阴极的下游边缘，并且当施加直流电源的输出电位时，由于起动端的高场强导致气体的击穿，从而在该端和中心部分之间产生放电 阴极。 这引起阴极和阳极之间的主放电。 在具有两组或更多套阴极 - 阳极电极的激光器中，用于每个阴极的起动元件通过串联连接的电阻器和将起动器元件与每个阴极电极电气隔离的二极管与其它起动器元件并联连接到电源 其他。

公开(公告)号：US4115828A

公开(公告)日：1978-09-19

申请号：US784699

申请日：1977-04-05

Applicant: Don H. Rowe ,  Michael W. Sasnett

Inventor： Don H. Rowe ,  Michael W. Sasnett

IPC: H02H1/00 ,  H02H3/44 ,  H02H7/22 ,  H02H3/32

CPC classification number: H02H3/445 ,  H02H1/0015

Abstract: Arc detection and control apparatus for a high power high voltage gas laser with a constant current power supply comprises a circuit responsive to changes in voltage across the laser electrodes for disconnecting the power supply when the voltage change exceeds a predetermined limit. The circuit monitors a small proportional value of the interelectrode voltage through an optical coupler and has a multiplier circuit for converting detected voltage changes and the differential thereof into pulses with a constant amplitude for fixed percentage changes of the electrode voltage and into pulses with increasing amplitudes for proportionally greater electrode voltage changes. This circuit normalizes and filters the resultant pulses and permits them to be compared to a reference voltage in a comparator circuit. When the pulse amplitude exceeds the value of the reference voltage a control apparatus is actuated which disconnects the power supply from the laser electrodes.

Abstract translation: 用于具有恒定电流电源的高功率高压气体激光器的电弧检测和控制装置包括响应于当电压变化超过预定极限时断开电源的激光电极两端的电压变化的电路。 该电路通过光耦合器监测电极间电压的小比例值，并具有一个乘法电路，用于将检测到的电压变化及其差值转换成具有恒定幅度的脉冲，用于电极电压的固定百分比变化，并增加幅度增加的脉冲 按比例更大的电极电压变化。 该电路对所得到的脉冲进行归一化和滤波，并允许它们与比较器电路中的参考电压进行比较。 当脉冲幅度超过参考电压的值时，控制装置被致动，其断开来自激光电极的电源。

公开(公告)号：US07524328B2

公开(公告)日：2009-04-28

申请号：US10389260

申请日：2003-03-14

Applicant: Kevin P. Connors ,  Michael W. Sasnett

Inventor： Kevin P. Connors ,  Michael W. Sasnett

IPC: A61N5/067

CPC classification number: A61B18/203 ,  A61B2018/00005 ,  A61B2018/00452 ,  A61B2018/00458 ,  A61B2018/00476

Abstract: A radiation delivery module (8) includes a body (48) supportable on a patient's skin and defines a skin surface plane generally aligned with the patient's skin surface (40). A radiation source (22) is mounted to the body and produces a beam (34) of tissue-damaging radiation directed transverse to and at the skin surface plane. The radiation beam creates a radiation spot (42) having a length (36) and a width (44) at the skin surface plane, the length being at least about 5 to 10 times the width. A number of scanned diode laser radiation sub-sources (64) each directing a radiation beam component (66) at the radiation spot may be used. The radiation source may include a rod lens as a focusing optical element. The radiation delivery module may also include a radiation source translator (18) so that the radiation spot moves in a direction generally perpendicular to the length of the radiation spot.

Abstract translation: 辐射递送模块（8）包括可支撑在患者皮肤上并限定通常与患者皮肤表面（40）对准的皮肤表面平面的本体（48）。 辐射源（22）安装到身体并产生横向于皮肤表面的组织损伤辐射束（34）。 辐射束产生在皮肤表面平面具有长度（36）和宽度（44）的辐射光斑（42），其长度至少为宽度的大约5至10倍。 可以使用多个在辐射点引导辐射束分量（66）的扫描二极管激光辐射子源（64）。 辐射源可以包括作为聚焦光学元件的棒状透镜。 辐射递送模块还可以包括辐射源转换器（18），使得辐射点沿大致垂直于辐射点的长度的方向移动。