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1.发明授权
公开(公告)号：EP0728400B1
公开(公告)日：1999-01-27
申请号：EP95932675.2
申请日：1995-09-06
发明人： WALLENSTEIN, Richard
IPC分类号： H04N9/31
CPC分类号： H04N9/3129 , G02F1/3532
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公开(公告)号：EP0902906A1
公开(公告)日：1999-03-24
申请号：EP98905279.0
申请日：1998-01-09
CPC分类号： G02B5/32 , H01S3/2383 , H01S5/4012 , H01S5/4025
摘要： The invention concerns a method and device for generating a coherent light beam (10), wherein n > 1 primary coherent light beams (14) are each passed at mutually fixed phase relations into one of n optical amplifiers (12), whereupon n secondary light beams (16) are guided out of these amplifiers (12). The n secondary light beams (16) are combined with a first optical system (20) by phase-matched superposition to form the coherent light beam to be generated.
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公开(公告)号：EP0882249A1
公开(公告)日：1998-12-09
申请号：EP97948850.0
申请日：1997-10-31
发明人： WUNDERLICH, Jörg , HILLER, Klaus , GÖPFERT, Frank , WALLENSTEIN, Richard , DETER, Christhard , BIEHLIG, Wolfram , KRÄNERT, Jürgen
CPC分类号： H04N9/3129 , G02B26/101 , G02B27/48
摘要： Device with a laser (10, 20, 30) for image reproduction. The laser (10,20,30) emits a laser beam (12, 22, 32) with a defined coherence length L for a given wavelength μ. The invention provides a first structure (44; 45; 52; 43; 67) which is placed in the path of the laser beam (12, 22, 32) enabling phase shifts to occur for the individual photons of the laser beam (12, 22, 32) according to a predetermined distribution. The average path resulting from the ratio between the average quadratic value of the phase shift caused by distribution and the sum of the wave vector k = 2 π/μ of the laser (10, 20, 30) is greater than the coherence length L multiplied by a factor 1/(12)1/2.
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