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    • 3. 发明授权
    • Piezoelectric device responsive to optical image for generating an
electrical signal
    • 响应于光学图像以产生电信号的压电器件
    • US4099206A
    • 1978-07-04
    • US560925
    • 1975-03-21
    • Jean DesboisPierre Tournois
    • Jean DesboisPierre Tournois
    • G01R23/17C07D501/24G02B27/46G06K9/74H04N3/10H04N3/14H01J39/12H01L41/04
    • H04N3/10
    • A piezoelectric substrate is subjected to the continuous excitations produced by a high-frequency electric field of fixed radian frequency .alpha. applied between its two opposite faces; high-frequency electrical pulses of radian frequency .alpha..sub.p are applied to the periodic network of conductors illuminated by the image; the electrical conductivity at the surface of the substrate at each point is made a function of the illumination directed towards said point, for example by the application of a photoconducting semi-conductor covering the network or by a substrate whose conductivity is directly modulated by the incident light. The non-linear interaction between the two substrate excitations induces a surface wave whose intensity is modulated by the luminous intensity and which is picked up by the transducers. Application with fixed .alpha..sub.p, to the point by point read-out of a linear optical image and with .alpha..sub.p = .alpha..sub.p (t) to the analysis of its spatial frequencies.
    • 压电基板受到在其两个相对面之间施加的固定弧度频率α的高频电场产生的连续激发; 辐射频率αp的高频电脉冲应用于由图像照射的导体的周期性网络; 使每个点处的基板表面的电导率作为朝向所述点的照明的功能,例如通过施加覆盖网络的光电导体半导体或由电导率被事件直接调制的基板 光。 两个衬底激发之间的非线性相互作用引起表面波,其强度由发光强度调制,并由传感器拾取。 应用固定alpha p,逐点读出线性光学图像,并用alpha p = alpha p(t)分析其空间频率。
    • 4. 发明授权
    • Unilateral surface wave transducer
    • 单边表面波传感器
    • US5264751A
    • 1993-11-23
    • US953290
    • 1992-09-30
    • Pierre DufilieJean Desbois
    • Pierre DufilieJean Desbois
    • H03H9/145H01L41/08
    • H03H9/14505
    • In a transducer for surface waves, an alternating succession of transmitter cells and reflector cells is used. The transmitter cells transmit surface waves in phase opposition, leftwards and rightwards. The reflector cells have a reflection coefficient that is in phase opposition between the left-hand side and the right-hand side. The waves transmitted by the transmitter cells interfere with the waves reflected by the reflector cells, destructively in one direction and constructively in the other direction. This enables the making of transducers with spacings equal to .lambda./4 and .lambda./6 only.
    • 在用于表面波的换能器中,使用交替连续的发射器单元和反射器单元。 发射机小区以相反方向向左和向右发射表面波。 反射器单元具有在左手侧和右手侧之间相位相反的反射系数。 由发射机发射的波与反射器单元反射的波干涉,在一个方向上相互破坏,另一个方向是建设性的。 这使得能够制造具有等于λ/ 4和λ/ 6的换能器。
    • 7. 发明授权
    • Surface acoustic wave filter utilizing the coupling of three acoustic
pathways
    • 表面声波滤波器利用三声道的耦合
    • US06043726A
    • 2000-03-28
    • US43570
    • 1998-03-25
    • Marc SolalJean Desbois
    • Marc SolalJean Desbois
    • H03H9/00H03H9/64
    • H03H9/6463H03H9/0028H03H9/6479
    • A surface acoustic wave filter having three acoustic pathways. The first acoustic pathway is made up of a first transducer including a first and second bonding pad and is arranged between two reflectors to form a first resonator. The second acoustic pathway is made of a second transducer including a third and fourth bonding pad and is arranged between two reflectors to form a second resonator. A third acoustic pathway is made of a third transducer including a fifth and sixth bonding pad and is arranged between two reflectors to produce a third resonator. Each bonding pad of the transducers is linked to a specified potential.
    • PCT No.PCT / FR96 / 01469 Sec。 371日期:1998年3月25日 102(e)1998年3月25日PCT PCT 1996年9月20日PCT公布。 公开号WO97 / 12441 日期1997年4月3日具有三个声学路径的表面声波滤波器。 第一声​​道由包括第一和第二接合焊盘的第一传感器构成,并且布置在两个反射器之间以形成第一谐振器。 第二声道由包括第三和第四接合焊盘的第二换能器构成,并且布置在两个反射器之间以形成第二谐振器。 第三声道由包括第五和第六接合焊盘的第三换能器构成,并且布置在两个反射器之间以产生第三谐振器。 换能器的每个接合焊盘连接到指定的电位。