申请公布号：JP2670857(B2)

申请号：JP19890167894

申请日期：1989.06.29

申请公布日期：1997.10.29

分类号：B23K26/06

主分类号：B23K26/06

摘要：PURPOSE:To obtain an optimum conduction for laser beam machining by bringing an inter-lens distance of a beam expander to variable control. CONSTITUTION:In a laser beam machine having a laser oscillator 1, a beam expander 4 and a condensing system, a distance between two pieces of incident side lens 41 and emitting side lens 42 for constituting the beam expander 4 is made variable, and an incident beam is emitted as an enlarged or reduced laser beam 2, curved vertically by a turn-back mirror 5, passes through a condensing lens 6 and forms a focal point 9 on a working object 7 on an working table 8. In such a way, by one set of laser beam machine, materials extending from a thin one to a thick one can be worked as an optimum beam spot diameter corresponding to its thickness.

METHOD AND DEVICE FOR DECODING MOVING PICTURE

IMAGE FORMING DEVICE

AMMONIA REMOVING APPARATUS, AND APPARATUS FOR AND METHOD OF TREATING ORGANIC WASTE USING THE AMMONIA REMOVING APPARATUS

TIMING CONTROL CIRCUIT, AND SEMICONDUCTOR MEMORY

LIGHT EMITTING DIODE PACKAGE AND ITS MANUFACTURING METHOD

LIGHT EMITTING DEVICE

INSPECTION SUPPORT SYSTEM

CONTACT LENS SELLING SYSTEM

COMMODITY MANAGEMENT CONSOLIDATION SYSTEM ON NETWORK MALL

SYSTEM, METHOD, AND PROGRAM FOR SUPPORTING WORKING MANAGEMENT

DEVICE, METHOD AND PROGRAM FOR EVALUATING VALIDITY OF CORPORATE ACTIVITY, AND COMPUTER-READABLE STORAGE MEDIUM RECORDING THE PROGRAM

MULTIFUNCTION SYSTEM AND ITS CONTROL METHOD

INVESTMENT CONTRACT SUPPORT APPARATUS, AND INVESTMENT CONTRACT SUPPORT PROGRAM

METHOD OF CALCULATING PURCHASING/ORDERING QUANTITY