公开(公告)号：EP1613933A1

公开(公告)日：2006-01-11

申请号：EP04725284.6

申请日：2004-04-02

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Sennheiser electronic GmbH & Co. KG

发明人： SCHREIBER, Peter ,  KUDAEV, Sergey ,  HIBBING, Manfred ,  MICHAELIS, Andre ,  NIEHOFF, Wolfgang ,  GORELIK, Vladimir ,  WEICHENHAIN-SCHRIEVER, Ruth ,  IHLEMANN, Jürgen

IPC分类号： G01H9/00

CPC分类号： G01H9/004

摘要： The invention relates to an arrangement for the optical distance determination of a reflecting surface, which can especially be used to determine small distance modifications, such as those that frequently occur in oscillating systems. One such arrangement can also be used as an optical microphone or hydrophone. The inventive arrangement is designed in such a way that light from a light source is directed towards a reflecting surface (4) by means of a first optical wave guide, and light reflected from the reflecting surface is directed towards at least one statically arranged optical detector by means of the first optical wave guide or at least one other optical wave guide. An optical element (2) collimating in the direction of the reflecting surface is arranged between the reflecting surface and the at least one optical wave guide. Furthermore, at least two optical elements (3) focussing in the direction of the reflecting surface are arranged above the reflecting surface, the optical axes of said optical elements being parallel to the optical axis of the collimating optical element and arranged at constant distances from each other.

公开(公告)号：EP1714172A1

公开(公告)日：2006-10-25

申请号：EP05733264.5

申请日：2005-03-24

申请人： LASER-LABORATORIUM GÖTTINGEN E.V. ,  Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： IHLEMANN, Jürgen ,  SCHULZ-RUTHENBERG, Malte ,  HEBER, Jörg

IPC分类号： G02B5/18 ,  B23K26/18 ,  C03C23/00

CPC分类号： C03C23/0025 ,  B23K26/009 ,  B23K26/0661 ,  B23K26/18

摘要： Disclosed is a method for producing an optical component, e.g. a four-stage diffractive phase element (6), for electromagnetic radiation by means of laser machining. According to said method, the applied wavelength of the electromagnetic radiation used can be selected independently of the machining wavelength of the laser radiation. The inventive method allows single-stage or multistage profiles to be produced on the component while being useable in a flexible manner on different components, the front face and/or the rear face thereof being optionally machinable. In order to create a staggered component (6) profile (8), a machining cycle is carried out several times, each machining cycle comprising a deposition step in which an absorption layer (2, 2', 2') that absorbs the machining wavelength in a raw state is applied to a substrate element (1) transparent for the machining wavelength range, and an ablation step in which the applied absorption layer (2, 2', 2') is ablated at least across some of the layer thickness at the irradiated points. Furthermore, a material transformation step in which the created profile (8) is transformed into a final state that is transparent for the applied wavelength range is carried out at least once.

公开(公告)号：EP1714172B1

公开(公告)日：2009-03-04

申请号：EP05733264.5

申请日：2005-03-24

申请人： LASER-LABORATORIUM GÖTTINGEN E.V. ,  Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： IHLEMANN, Jürgen ,  SCHULZ-RUTHENBERG, Malte ,  HEBER, Jörg

IPC分类号： G02B5/18 ,  B23K26/18 ,  C03C23/00

CPC分类号： C03C23/0025 ,  B23K26/009 ,  B23K26/0661 ,  B23K26/18

摘要： Disclosed is a method for producing an optical component, e.g. a four-stage diffractive phase element (6), for electromagnetic radiation by means of laser machining. According to said method, the applied wavelength of the electromagnetic radiation used can be selected independently of the machining wavelength of the laser radiation. The inventive method allows single-stage or multistage profiles to be produced on the component while being useable in a flexible manner on different components, the front face and/or the rear face thereof being optionally machinable. In order to create a staggered component (6) profile (8), a machining cycle is carried out several times, each machining cycle comprising a deposition step in which an absorption layer (2, 2', 2") that absorbs the machining wavelength in a raw state is applied to a substrate element (1) transparent for the machining wavelength range, and an ablation step in which the applied absorption layer (2, 2', 2") is ablated at least across some of the layer thickness at the irradiated points. Furthermore, a material transformation step in which the created profile (8) is transformed into a final state that is transparent for the applied wavelength range is carried out at least once.