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21. 发明授权

US4150342A Method and apparatus for automatically reacquiring a predetermined output radiation frequency in a tunable laser system despite momentary perturbations of laser oscillation 失效
标题翻译：无论激光振荡的瞬间扰动，在可调激光系统中自动重新获取预定输出辐射频率的方法和装置
公开(公告)号：US4150342A
公开(公告)日：1979-04-17
申请号：US812698
申请日：1977-07-05
申请人： Thomas F. Johnston, Jr. , James L. Hobart , Robert C. Rempel , Gerald H. Williams
发明人： Thomas F. Johnston, Jr. , James L. Hobart , Robert C. Rempel , Gerald H. Williams
IPC分类号： H01S3/106 , H01S3/137 , H01S3/10
CPC分类号： H01S3/137 , H01S3/106
摘要： Method and apparatus are disclosed in a frequency controlled tunable laser system which may be tuned selectively by an operator to any predetermined output radiation frequency within its operating range and servo-locked to maintain that output frequency, for rapidly and automatically maintaining and reacquiring a predetermined output radiation frequency despite momentary interruptions or perturbations of laser oscillation.
摘要翻译：在频率可控的可调激光系统中公开了方法和装置，其可以由操作者选择性地调整到其工作范围内的任何预定的输出辐射频率并且被伺服锁定以维持该输出频率，以快速且自动地维持和重新获取预定的输出辐射频率尽管瞬间中断或激光振荡的扰动。

22. 发明授权

US06743221B1 Laser system and method for treatment of biological tissues 失效
公开(公告)号：US06743221B1
公开(公告)日：2004-06-01
申请号：US10097555
申请日：2002-03-12
申请人： James L. Hobart , Daniel K. Negus , Daniel Paul Joseph , Peter Nigel Allen
发明人： James L. Hobart , Daniel K. Negus , Daniel Paul Joseph , Peter Nigel Allen
IPC分类号： A61B1818
CPC分类号： A61B18/22 , A61F9/00736 , A61F9/008 , A61F9/00821 , A61F2009/00863 , A61F2009/00874
摘要： A system for and method of performing laser assisted surgery is disclosed. Laser radiation is preferably delivered to a target area of tissue using a Er:YAG laser source. The laser radiation is delivered to the target area in bursts of laser radiation comprising sets of laser pulses. The bursts of laser radiation are preferably delivered to the target area at a repetition rate in a range of 10 to 40 Hz and with sufficient pulse fluences to cut and/or dissect. In accordance with a preferred embodiment, interchangeable and flexible endo-probes are configured with shield features. The shield features control the emission of laser radiation from the optical fiber while bending the flexible probes allow surgeons to access a range of approach angles for the laser treatment of biological tissue enclosed or within a cavity of a body. The probes can also be configured with mechanical cutters or other structures which allow for the mechanical manipulation of tissue during laser treatment. The system for and method of performing laser assisted surgery is particularly well suited for treating fibrous and/or fibro-vascular membranes (FVMs) on ophthalmic tissue during vitreoretinal surgery.

23. 发明授权

US4949358A Ring laser with improved beam quality 失效
标题翻译：环形激光，光束质量得到改善
公开(公告)号：US4949358A
公开(公告)日：1990-08-14
申请号：US185864
申请日：1988-04-25
申请人： Joseph W. Kantorski , Klaus Hachfeld , James L. Hobart
发明人： Joseph W. Kantorski , Klaus Hachfeld , James L. Hobart
IPC分类号： G02B27/28 , B23K26/06 , H01S3/083
CPC分类号： H01S3/083
摘要： A rod laser having a ring cavity configuration, and including a polarization rotator to compensate for birefringence of the laser's rod. Preferably, the rotator is a 90.degree. crystal quartz rotator. In a preferred embodiment, the ring laser is a stable quasi-unidirectional, non-confocal solid state ring laser. A telescope, including at least two lenses with variable inter-lens spacing, is preferably positioned in the laser beam path as closely as possible to the laser rod. The spacing between the telescope lenses is preferably controlled by a servo mechanism. In a preferred embodiment, a power density detector is provided for producing a beam power signal, and a means (which may include a microprocessor) coupled to the power density detector generates a servo mechanism feedback control signal from the beam power signal. Since the system of the invention maintains a high quality output beam having low far-field beam divergence and small laser beam focal spot diameter, over a wide and varying range of output beam power, the output beam is particularly useful for such applications as high speed drilling, welding, and cutting.

24. 发明授权

US4378600A Gas laser 失效
标题翻译：气体激光
公开(公告)号：US4378600A
公开(公告)日：1983-03-29
申请号：US259911
申请日：1981-05-04
申请人： James L. Hobart
发明人： James L. Hobart
IPC分类号： H01S3/03 , H01S3/02
CPC分类号： H01S3/03
摘要： A gaseous laser includes a gas discharge tube made of a comparatively thin-walled ceramic tube. Heat from the discharge is transmitted to the exterior tube by conduction through thin-walled, cup-shaped members which are bonded to the interior wall of the ceramic tube. The discharge cross-section is determined by apertures in sputter-resistant discs which are coaxially affixed to or formed on the cup members. Also coaxially affixed to the cup-members are cylindrical shields which control gas pumping within the tube. Gas return holes are provided in the cup-members.
摘要翻译：气体激光器包括由相对薄壁的陶瓷管制成的气体放电管。通过导电通过薄壁的杯形构件将排出的热量传递到外管，该杯状构件结合到陶瓷管的内壁。排放横截面由同时固定在杯形件上或形成在杯状构件上的防溅射盘中的孔确定。还同轴地固定到杯形构件的是圆柱形护罩，其控制管内的气体泵送。在杯形件中设置有气体返回孔。

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