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    • 3. 发明公开
    • APPARATUS AND METHOD FOR SINGLE SHOT MEASUREMENT OF THE M2 PARAMETER OF A LASER BEAM
    • DEVICE AND METHOD FOR激光束M2参数的单次测量
    • EP2952861A1
    • 2015-12-09
    • EP15001590.7
    • 2015-05-27
    • Fyzikální ústav AV CR, v.v.i.
    • Miura, TaisukeNagisetty, Siva SankarMocek, Tomas
    • G01J1/42G01J1/58
    • G01J1/4257G01J1/58
    • The invention provides an apparatus and method for single shot measurement of laser beam (1) quality parameter M 2 , wherein the measured laser beam (1) having the wavelength in the VIS, IR or UV spectral region is focused by the focusing optics system (3) and enters an imaging body (5) so that the caustic beam waist of the focused measured laser beam (1) is located within the imaging body material, said imaging body (5) being made of a material showing luminescence in the wavelength range of the measured laser beam (1) and having at least one planar base substantially perpendicular to the propagation axis of the measured laser beam (1), the minimum cross-sectional dimension ( a ) of said base being bigger or equal to the diameter ( d 0 ) of the laser beam (1) entering the apparatus ( a ≥ d 0 ), and said imaging body (5) further having at least one planar side substantially parallel with the propagation axis of the measured laser beam (1), whereas said planar base and said planar side share one edge in common and are polished into optically transparent planes, whereas a luminescence pattern is formed in said imaging body (5), and said luminescence pattern is detected and assessed.
    • 本发明提供了一种用于激光束(1)质量参数M 2,worin(1),其具有在可见,红外或紫外光谱区的波长由聚焦光学系统聚焦的测量激光束的单次测量(装置和方法 3)并进入(成像体5的)象聚焦的测量激光束的苛性束腰(1)位于所述成像体材料内,所述成像主体(5)由表示的波长范围内发光的材料的 测得的激光束(1)和基本垂直于所述测量激光束的传播轴(1),最小的横截面尺寸具有至少一个平面基底的(a)所述基体是更大或等于直径( D 0)的激光束(1)进入所述装置(‰¥D 0),和所述成像主体(5)还具有至少一个平面侧面基本上与所测量的激光束(1)的传播轴平行, 而所述平面基底和所述平面小号 IDE共享一个共同的边缘,并抛光成光学透明的平面上,而一个发光图案在所述成像体(5)形成,并且被检测并评估。所述发光模式。