公开(公告)号：US11355087B2

公开(公告)日：2022-06-07

申请号：US16764737

申请日：2018-08-03

申请人： Université de Rennes 1 ,  Albert Le Floch

发明人： Albert Le Floch ,  Guy Ropars

IPC分类号： G09G5/30 ,  G09B17/00

摘要： A method for displaying graphical content in a playback device (DISP), the graphical content being displayed and erased periodically on the display device according to successive cycles that take place at a predetermined frequency (Fd) and in that the successive display periods each have a duration (T1) comprised in an interval of values ranging from 15 to 30% of the duration (T) of the cycles that have taken place.

公开(公告)号：US11604361B2

公开(公告)日：2023-03-14

申请号：US16765278

申请日：2018-08-03

申请人： UNIVERSITÉ DE RENNES 1 ,  Albert Le Floch

发明人： Albert Le Floch ,  Guy Ropars

IPC分类号： G02B27/02 ,  G02C7/10 ,  G02C7/12

摘要： The invention relates to an optical device (FILT) for filtering light received, by polarisation or mechanically, from a medium presenting a graphic and/or textual content, characterized in that cycles of opening and closing a vision space, in a visible light spectrum, are realized periodically using the optical device (FILT) at a preset frequency Fd and in that the successive open periods each have a duration (T1) comprised in an interval of values ranging from 15 to 35% of the duration (T) of the realized cycles.

公开(公告)号：US20210183340A1

公开(公告)日：2021-06-17

申请号：US16764737

申请日：2018-08-03

申请人： Albert LE FLOCH ,  Université de Rennes 1

发明人： Albert LE FLOCH ,  Guy ROPARS

IPC分类号： G09G5/30 ,  G09B17/00

摘要： A method for displaying graphical content in a playback device, the graphical content being displayed and erased periodically on the display device according to successive cycles that take place at a predetermined frequency (Fd) and in that the successive display periods each have a duration (T1) comprised in an interval of values ranging from 15 to 30% of the duration (T) of the cycles that have taken place.

公开(公告)号：US20200310141A1

公开(公告)日：2020-10-01

申请号：US16765278

申请日：2018-08-03

申请人： Albert LE FLOCH ,  UNIVERSITÉ DE RENNES 1

发明人： Albert LE FLOCH ,  Guy ROPARS

IPC分类号： G02B27/02 ,  G02C7/10 ,  G02C7/12

摘要： The invention relates to an optical device (FILT) for filtering light received, by polarisation or mechanically, from a medium presenting a graphic and/or textual content, characterized in that cycles of opening and closing a vision space, in a visible light spectrum, are realized periodically using the optical device (FILT) at a preset frequency Fd and in that the successive open periods each have a duration (T1) comprised in an interval of values ranging from 15 to 35% of the duration (T) of the realized cycles.

公开(公告)号：US3976957A

公开(公告)日：1976-08-24

申请号：US576004

申请日：1975-05-09

申请人： Albert Le Floch ,  Guy Stephan

发明人： Albert Le Floch ,  Guy Stephan

IPC分类号： G02F1/09 ,  H01S3/137 ,  H01S3/139 ,  H01S3/13

CPC分类号： H01S3/137 ,  G02F1/092 ,  H01S3/1398

摘要： In a method for stabilizing the frequency of the stimulated radiation emitted by a laser, the radiation is subjected to a first rotation of its direction of polarization by applying a magnetic field to a material which exhibits the phenomenon of magnetic rotatory polarization and is placed in a two-mirror resonator. Anisotropic losses are introduced in the resonator so as to produce a second rotation of the direction of polarization, part of the radiation contained in the resonator is extracted and its direction of polarization D is measured. The direction D is held in a reference direction D.sub.O by measuring the difference between the two directions, by reducing this difference to zero and by modifying the value of the resonant frequency of the resonator.

摘要翻译： 在用于稳定由激光器发射的受激辐射的频率的方法中，通过对表现出旋转极化现象的材料施加磁场并将辐射放置在其中，使辐射经受其偏振方向的第一旋转 双镜面谐振器。 在谐振器中引入各向异性损耗以产生偏振方向的第二旋转，提取包含在谐振器中的部分辐射，并测量其偏振方向D. 通过测量两个方向之间的差异，通过将该差减小到零并通过修改谐振器的谐振频率的值来将方向D保持在参考方向DO。

公开(公告)号：US20190159324A1

公开(公告)日：2019-05-23

申请号：US15883233

申请日：2018-01-30

申请人： Albert Le Floch ,  Université de Rennes 1

发明人： Albert Le Floch ,  Guy Ropars

IPC分类号： H05B37/02 ,  A61B5/16

摘要： The invention relates to a lighting device (LIGHT) of a graphic and/or textual content represented on any support and in particular of the paper type, characterized in that a light beam generated in a visible light spectrum is activated and periodically deactivated from the lighting device (LIGHT) according to successive cycles operated at a predetermined frequency (Fd) and in that the successive illumination periods each have a duration (T1) within a range of values from 15 to 30% of the duration (T) of the operated cycles.

公开(公告)号：US3649930A

公开(公告)日：1972-03-14

申请号：US3649930D

申请日：1970-12-04

申请人： ALBERT LE FLOCH

发明人： FLOCH ALBERT LE

IPC分类号： H01S3/139 ,  H01S3/10

CPC分类号： H01S3/1398

摘要： The method consists in applying a steady axial magnetic field to the active gaseous medium, in determining either the value of said steady magnetic field which corresponds to the laser-cavity oscillation frequency to be stabilized or the length of the laser cavity corresponding to a set value of the steady magnetic field so that the oscillation frequency should correspond to the peak value of one of the two Doppler curves obtained as a result of the Zeeman effect by splitting the Doppler curve which corresponds to a zero value of the steady magnetic field, in superimposing an alternating axial magnetic field on said steady magnetic field and causing the split Doppler curve to oscillate about a position corresponding to the selected value of the steady magnetic field in order to modulate the output light intensity of said laser, in detecting the modulated output intensity, in comparing the variations in modulation of said output intensity with those of the alternating magnetic field by means of a detector which delivers a signal so that the lightemission frequency of the laser may be corrected by said signal and by a change in length of the laser cavity.

摘要翻译： 该方法包括在活性气体介质中施加稳定的轴向磁场，确定对应于要稳定的激光腔振荡频率的所述稳定磁场的值或与设定值对应的激光腔的长度 的稳定磁场，使得振荡频率应对应于通过分割对应于稳定磁场的零值的多普勒曲线而获得的作为塞曼效应的结果的两个多普勒曲线之一的峰值，重叠 在所述稳定磁场上的交替的轴向磁场，并且使得所述分裂多普勒曲线围绕与所选择的所述稳定磁场的值相对应的位置振荡，以便在检测所述调制输出强度时调制所述激光器的输出光强度， 在比较所述输出强度的调制与交变磁场的变化的变化时 检测器的装置，其传送信号，使得可以通过所述信号和激光腔的长度变化来校正激光的发光频率。

公开(公告)号：US11134550B2

公开(公告)日：2021-09-28

申请号：US16765085

申请日：2018-08-03

申请人： Université de Rennes 1 ,  Albert Le Floch

发明人： Albert Le Floch ,  Guy Ropars

IPC分类号： H05B45/37 ,  H05B47/16 ,  H05B45/305 ,  G02B27/02 ,  A61B5/16 ,  F21Y115/10

摘要： The invention relates to a device (LIGHT) for lighting a graphic and/or textual content present on any medium and in particular on a paper medium. The lighting device (LIGHT) is configured to periodically activate and deactivate said lighting beam in successive cycles carried out at a preset frequency Fd. Each cycle has a duration T and comprises a period of activation of the light beam of duration T1 followed by a period of deactivation of the light beam of duration T2 or vice versa. The frequency Fd is comprised in an interval of values ranging from 60 to 90 Hz and the duration T1 of the periods of activation of the light beam is comprised in an interval of values ranging from 15 to 30% of the duration T of the cycles.

公开(公告)号：US5091912A

公开(公告)日：1992-02-25

申请号：US653636

申请日：1991-02-12

申请人： Fabien Bretenaker ,  Albert Le Floch

发明人： Fabien Bretenaker ,  Albert Le Floch

IPC分类号： H01S3/08 ,  H01S3/106 ,  H01S3/137 ,  H01S3/139

CPC分类号： H01S3/137 ,  H01S3/106 ,  H01S3/1396 ,  H01S3/08054 ,  H01S3/0809

摘要： A laser for use in all fields of measurement using a heterodyne effect delivers two waves at different frequencies, having mutually orthogonal linear polarizations. It comprises a lasing medium placed in a laser resonating cavity defined by mirrors and a birefringent crystal placed on the path of the two waves. The lasing medium is located in the resonating cavity in a zone where the two waves are separated spatially. Two quarter wave plates, one of which has neutral lines at substantially 45.degree. from the polarization axes of the birefringent means, are placed in the common path of the two waves so as to give a helical polarization to the two waves between the plates.

摘要翻译： 在使用外差效应的所有测量领域中使用的激光器以不同的频率提供具有相互正交的线性偏振的两个波。 它包括放置在由反射镜限定的激光谐振腔中的激光介质和放置在两个波的路径上的双折射晶体。 激光介质位于两个波在空间上分离的区域中的谐振腔中。 其中一个具有与双折射装置的偏振轴大致45度的中性线的两个四分之一波片被放置在两个波的共同路径中，从而给板之间的两个波形提供螺旋偏振。

公开(公告)号：US4305046A

公开(公告)日：1981-12-08

申请号：US54908

申请日：1979-07-05

申请人： Albert Le Floch ,  Roger Le Naour

发明人： Albert Le Floch ,  Roger Le Naour

IPC分类号： G02B27/28 ,  H01S3/083 ,  H01S3/098 ,  H01S3/13 ,  H01S3/08

CPC分类号： H01S3/08036 ,  G02B27/288 ,  H01S3/083 ,  H01S3/13

摘要： Selective optical resonator comprising at least two mirrors and a selective means disposed between two of these mirrors, said means being constituted by:an at least partial linear polarization means for the light in a direction P,a first birefringent plate having two neutral lines, one forming an angle .alpha..sub.1 =0 with direction P,an optically active substance having a birefringence with dispersion and which rotates the light polarization direction by an angle .theta. dependent on the wavelength of the .lambda. light,a second plate which is identical to the first having two neutral lines, one forming the angle .alpha..sub.2 =.theta. with the direction P, whereby the resonator is then selective for said wavelength .lambda..

摘要翻译： 选择性光学谐振器包括至少两个反射镜和设置在这些反射镜中的两个之间的选择性装置，所述装置由以下部分构成：用于沿方向P的光的至少部分线性偏振装置，具有两根中性线的第一双折射板， 与方向P形成角度α1 = 0，具有色散双折射并使光偏振方向旋转取决于λ光波长的角度θ的光学活性物质，与第一板的第一板相同的第二板 两个中性线，一个与方向P形成角度α2 =θ，从而谐振器然后对于所述波长λ是选择性的。