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    • 85. 发明授权
    • Apparatus and method for determining objective refraction using wavefront sensing
    • 使用波前感测确定客观折射的装置和方法
    • US06761454B2
    • 2004-07-13
    • US10076218
    • 2002-02-13
    • Shui T. LaiAndreas Dreher
    • Shui T. LaiAndreas Dreher
    • A61B310
    • A61B3/1015A61B3/103
    • An apparatus for determining the objective refraction of a patient's eye includes a transparent window and a wavefront measurement device that determines aberrations in a return beam from the patient's eye after the beam passes through a corrective test lens in the apparatus. The wavefront measurement device outputs an instant display representative of the quality of vision afforded the patient through the test lens. The display can be a representation of a Snellen chart, convoluted with the optical characteristics of the patient's vision, an overall quality of vision scale or the optical contrast function, all based on the wavefront measurements of the patient's eye. The examiner may use the display information to conduct a refraction examination and other vision tests without the subjective response from the patient.
    • 用于确定患者眼睛的客观折射的装置包括透明窗口和波前测量装置,其在束通过装置中的校正测试透镜之后确定来自患者眼睛的返回光束中的像差。 波前测量装置通过测试镜输出代表患者质量的瞬时显示。 所述显示器可以是基于患者眼睛的波前测量值的与所述患者视力的光学特性,整体视觉量表或光学对比度功能的曲线相一致的斯奈伦图表的表示。 审查员可以使用显示信息进行折射检查和其他视力测试,而不需要患者的主观反应。
    • 86. 发明授权
    • Method of, and apparatus for, surgery of the cornea
    • 角膜手术及其手术方法
    • US06210401B1
    • 2001-04-03
    • US09130547
    • 1998-08-06
    • Shui T. Lai
    • Shui T. Lai
    • A61B1818
    • B23K26/0665A61B2017/00694A61F9/00804A61F9/00814A61F2009/00846A61F2009/00872A61F2009/00897B23K26/0096B23K26/03B23K26/032B23K26/04B23K26/043B23K26/06B23K26/0624B23K26/0648B23K26/0652B23K26/704G02B26/10G02F1/37H01S3/005H01S3/06H01S3/101H01S3/235
    • A laser-based method and apparatus for corneal surgery. The present invention is intended to be applied primarily to ablate organic materials, and human cornea in particular. The invention uses a laser source which has the characteristics of providing a shallow ablation depth (0.2 microns or less per laser pulse), and a low ablation energy density threshold (less than or equal to about 10 mJ/cm2), to achieve optically smooth ablated corneal surfaces. The preferred laser includes a laser emitting approximately 100-50,000 laser pulses per second, with a wave-length of about 198-300 nm and a pulse duration of about 1-5,000 picoseconds. Each laser pulse is directed by a highly controllable laser scanning system. Described is a method of distributing laser pulses and the energy deposited on a target surface such that surface roughness is controlled within a specific range. Included is a laser beam intensity monitor and a beam intensity adjustment means, such that constant energy level is maintained throughout an operation. Eye movement during an operation is corrected for by a corresponding compensation in the location of the surgical beam. Beam operation is terminated if the laser parameters or the eye positioning is outside of a predetermined tolerable range. The surgical system can be used to perform surgical procedures including removal of corneal scar, making incisions, cornea transplants, and to correct myopia, hyperopia, astigmatism, and other corneal surface profile defects.
    • 一种基于激光的角膜手术方法和装置。 本发明旨在主要用于消融有机材料,特别是人角膜。 本发明使用具有提供浅消融深度(每个激光脉冲0.2微米或更小)和低消融能量密度阈值(小于或等于约10mJ / cm 2)的特征的激光源,以实现光学平滑 消融角膜表面。 优选的激光器包括每秒发射大约100-50,000激光脉冲的激光器,波长为约198-300nm,脉冲持续时间为约1-5,000皮​​秒。 每个激光脉冲由高度可控的激光扫描系统引导。 描述了分配激光脉冲和沉积在目标表面上的能量的方法,使得表面粗糙度被控制在特定范围内。 包括激光束强度监视器和光束强度调节装置,使得在整个操作中保持恒定的能量水平。 通过对外科手术束的位置进行相应的补偿来校正手术期间的眼睛运动。 如果激光参数或眼睛定位超出预定的可容许范围,则光束操作终止。 手术系统可用于执行外科手术,包括去除角膜瘢痕,制作切口,角膜移植物,并矫正近视,远视,散光和其他角膜表面轮廓缺陷。
    • 87. 发明授权
    • Self starting, self mode-locked lasers
    • 自启动,自锁式激光器
    • US5799025A
    • 1998-08-25
    • US826281
    • 1997-03-27
    • Ming LaiShui T. Lai
    • Ming LaiShui T. Lai
    • H01S3/098
    • H01S3/1112H01S3/0805H01S3/0811
    • A self starting, self mode-locked laser is disclosed that utilizea gain saturation lens and an optical Kerr lens to start and to sustain passive mode locking. The laser consists of a resonant cavity which has a saturable gain medium and an optical Kerr lens medium. The laser cavity is described such that the loss modulation induced by the gain saturation lens is cascaded to that of the optical Kerr lens to start the mode locking process, while the loss modulation of the Kerr lens maintains the mode locking. The self mode locking operation restores automatically without any additional induction mechanism, after the pump laser beam or the laser cavity is blocked and then unblocked. In a preferred embodiment, the laser includes a resonant cavity , a Ti:sapphire crystal which produces both the gain saturation lens and the optical Kerr lens, a prism pair for ultra-short pulse operation, and a slit for laser bandwidth control and wavelength tuning. This laser can produce stable pulses shorter than 100 femtosecond.
    • 公开了一种自启动自锁式激光器,其利用增益饱和透镜和光学克尔透镜启动并维持被动模式锁定。 激光器由具有可饱和增益介质和光学克尔透镜介质的谐振腔组成。 描述激光腔,使得由增益饱和透镜引起的损耗调制级联到光学克尔透镜的损耗调制以开始模式锁定过程,而克尔透镜的损耗调制保持模式锁定。 自动模式锁定操作自动恢复,无需任何额外的感应机构,泵浦激光束或激光腔被阻塞然后解除封锁。 在优选实施例中,激光器包括谐振腔,产生增益饱和透镜和光学克尔透镜的钛蓝宝石晶体,用于超短脉冲操作的棱镜对,以及用于激光带宽控制和波长调谐的狭缝 。 该激光器可产生短于100飞秒的稳定脉冲。