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51. 发明专利

JPH01168083A GAS LASER APPARATUS 失效
公开(公告)号：JPH01168083A
公开(公告)日：1989-07-03
申请号：JP32547887
申请日：1987-12-24
申请人： TOSHIBA CORP
发明人： OGURA YASUHIRO
IPC分类号： H01S3/034 , H01S3/036 , H01S3/10
摘要： PURPOSE:To remove mirrors simply in a short time without a special exhausting pump, by connecting resonator parts and a laser wind tunnel through communicating pipes having a valve at the intermediate part. CONSTITUTION:A valve 9 at the intermediate part of communicating pipes 10 and 10, by which resonator parts 2 and 2 and a laser wind tunnel are communicated, is normally closed. When mirrors 1 are replaced, an atmosphere release valve 7 is opened with the valve 9 being closed, and the insides of the resonator parts 2 and 2 are made to be atmospheric pressure. Partitioning walls 5 are brought into contacts with communicating paths 20 tightly, so that the laser wind tunnel 3 and the resonator parts 2 are shut off. Under this state, the atmosphere release valve 7 is closed, and the valve 9 is opened. Then, the resonator parts 2 and the laser wind tunnel 3 are communicated through the communicating pipes 10 and 21 to each other. The atmosphere is made to flow into the laser wind tunnel 3 from the resonator parts 2 through the valve 9 until the pressure difference between both parts becomes zero. In this way, the pressure difference between the resonator parts and the laser wind tunnel 3 is eliminated. The partitioning walls 5 are opened, and the mirrors 1 are replaced.

52. 发明专利

JPH01146385A LASER BEAM ABSORBER 失效
公开(公告)号：JPH01146385A
公开(公告)日：1989-06-08
申请号：JP30449587
申请日：1987-12-03
申请人： TOSHIBA CORP
发明人： OGURA YASUHIRO
IPC分类号： H01S3/10 , G02B5/00 , G02B5/02 , H01S3/00
摘要： PURPOSE:To obtain a safety laser beam absorber preventing a diffusion to the outside of emitted light and obviating damage to a structure, etc., by keeping the vertical angles of a cone and a truncated cone reflecting and absorbing laser beams in constant relationship and aligning the direction of emitted light to the optical axis of incident light. CONSTITUTION:In a laser beam absorber 10 being composed of a cone 11 and a truncated cone 12 sharing a shaft together with the cone 11 while surrounding the cone 11 and absorbing the energy of laser beams 13 projected in parallel with said shaft while reflecting laser beams 13 between the cone 11 and the truncated cone 12, the vertical angle A of the cone 11 and the vertical angle B of the truncated cone 12 are selected so that AXN-BX(N-1)=180 deg. holds for a positive integer N. When N=5 and the vertical angle of the cone 11 is selected at 60 deg. and the vertical angle of the truncated cone 12 at 30$, laser beams 13 projected in parallel with the shaft are reflected absorbed by the cone 11 and the truncated cone 12 alternately, and projected at a right angle to the surface of the cone 11 by fifth reflection, and the reflected light is returned in the direction opposite to incident light 13 as emitted light 14 through a path reverse to said path.

53. 发明专利

JPS63273582A LASER BEAM MACHINE 失效
公开(公告)号：JPS63273582A
公开(公告)日：1988-11-10
申请号：JP10634287
申请日：1987-05-01
申请人： TOSHIBA CORP
发明人： OGURA YASUHIRO
IPC分类号： B23K26/00 , B23K26/064
摘要： PURPOSE:To perform the laser beam machining with the high reliability without interrupting the laser beam machining by the trouble, etc., of a laser beam oscillation part by providing two laser beam oscillation parts to supply a laser beam and a changeover means of a supply source of the laser beam to a laser beam machining part. CONSTITUTION:The laser beam 16 emitted from the laser beam oscillation part 11 enters a transmission optical path 15 and is led to the laser beam machining part 10 by a reflection mirror 14 and a changeover mirror 13a. Moreover, the laser beam 16 emitted from the laser beam oscillation part 12 enters the transmission optical path 15 and is led to the laser beam machining part 10 by the reflection mirror 14 and a changeover mirror 13b. Here, the laser beam 16 from the laser beam oscillation parts 11 and 12 can be optionally led to the laser beam machining part 10 by taking the changeover mirrors 13a and 13b in and out of the transmission optical path 15. Accordingly, in case one laser beam oscillation part 11 breaks down, the supply source of the laser beam 16 is changed over to the other laser beam oscillation part 12, by which the laser beam 16 can be supplied to the laser beam machining part.

54. 发明专利

JPS62181480A GAS LASER OSCILLATOR 失效
公开(公告)号：JPS62181480A
公开(公告)日：1987-08-08
申请号：JP2203186
申请日：1986-02-05
申请人： TOSHIBA CORP
发明人： OGURA YASUHIRO
IPC分类号： H01S3/097 , H01S3/036 , H01S3/04
摘要： PURPOSE:To make the quick stopping and restart of a gas laser oscillator possible, and reduce its warming-up time, by applying an electric braking, such as the regenerative braking or the induction braking, at the stopping of a blower. CONSTITUTION:A blower 19a is driven by an inverter in order to circulate a lower pressure laser gas of about 1/20atom with high speed. When the blower 19a in such a gas laser oscillator 10 is required to be quickly stopped on account of abnormal discharge, etc. the so-called regenerative braking is applied wherein the rotation energy of the blower 19a is fed back in the form of electric power to a power source by virtue of the effect that the blower 19a can operate as a generator. Thereby the blower 19a can be quickly stopped and warming-up time in the case of restart can be reduced.

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