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公开(公告)号：US5339101A
公开(公告)日：1994-08-16
申请号：US815730
申请日：1991-12-30
CPC分类号： B41J2/14008 , B41J2002/14322
摘要： A printhead for an acoustic ink printer has a piezoelectric transducer on one surface of a substrate. A layer of a dielectric material is provided on the surface of the transducer away from the substrate. A Fresnel lens is formed in the surface of the dielectric layer away from the transducer, for focusing sound energy near the surface of a body of ink adjacent the dielectric layer. Thus the transducer and lens are both on the same side of the substrate. A pit may be formed in the substrate under the transducer. The transducer may be a body of piezoelectric material sandwiched between a pair of electrodes, the lower electrode of which has a thickness that is a quarter wave at the excitation frequency of the transducer. An anti-reflective coating may be provided on the lower surface of the substrate, with a body of an absorptive material abutting the anti-reflective layer, or an absorptive material having an acoustic impedance approximately matching that of the substrate may be coated on the lower surface of the substrate.
摘要翻译： 用于声学墨水打印机的打印头在基板的一个表面上具有压电换能器。 介电材料层设置在远离基板的换能器表面上。 在电介质层的表面上形成菲涅尔透镜，远离换能器，用于将声能聚焦在靠近电介质层的墨体表面附近。 因此，传感器和透镜都在基板的相同侧上。 可以在换能器下方的基板中形成凹坑。 换能器可以是夹在一对电极之间的压电材料体，其下电极具有在换能器的激发频率下的四分之一波长的厚度。 可以在基板的下表面上设置抗反射涂层，吸收材料的主体邻接抗反射层，或者具有与基板大致匹配的声阻抗的吸收材料可以涂覆在下部 基板的表面。
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公开(公告)号：US5268610A
公开(公告)日：1993-12-07
申请号：US815731
申请日：1991-12-30
CPC分类号： B06B1/067 , B41J2/14008
摘要： An acoustic ink printer transducer comprising a piezoelectric layer positioned between two suitable electrode materials. Also, a method for obtaining second harmonic operations from an acoustic ink printer transducer to enable ejection of a number of different ink droplet sizes from the acoustic ink printer thereby facilitating grey scale printing.
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公开(公告)号：US5629724A
公开(公告)日：1997-05-13
申请号：US890995
申请日：1992-05-29
CPC分类号： B41J2/14008 , B41J2002/14322
摘要： Techniques for obtaining an ejection rate independent, spatial relationship between an acoustic focal area and the free surface of a liquid. Variations in the spatial relationship are reduced or eliminated by applying substantially the same acoustic energy to the liquid's free surface during periods when droplets are not ejected as when they are, but at power levels insufficient to eject a droplet. During ejection periods in which a droplet is not ejected, the acoustic energy is applied at a lower level, but for a longer time. Because it is more convenient to measure and control, the transducer drive voltage is used to control the acoustic energy applied to the liquid's free surface.
摘要翻译： 用于获得喷射速率独立的声学焦点区域和液体的自由表面之间的空间关系的技术。 在液滴不喷射的时段期间，通过对液体的自由表面施加基本上相同的声能，而在功率水平不足以喷射液滴的时期，空间关系的变化被减少或消除。 在不喷射液滴的喷射期间，声能被施加在较低的水平上，但持续较长的时间。 因为测量和控制更方便，因此传感器驱动电压用于控制施加到液体自由表面的声能。
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公开(公告)号：US5194880A
公开(公告)日：1993-03-16
申请号：US632260
申请日：1990-12-21
IPC分类号： B41J2/065
CPC分类号： B41J2/065
摘要： An ejector for ejecting droplets from an ink-filled reservoir is disclosed. The ejector comprises a substrate with a generally planar surface. The substrate is submerged in the reservoir so that the substrate surface is parallel to the reservoir surface at a shallow predetermined depth. On the substrate surface around a center is a plurality of concentric, circular electrodes. A coupled oscillator excites the electrodes in a temporal relationship such that the capillary waves generated at the ink reservoir surface are reinforced so that droplets may be ejected from the reservoir at the center of the electrodes.
摘要翻译： 公开了一种用于从填充墨水的储存器喷射液滴的喷射器。 喷射器包括具有大致平坦表面的基板。 将基板浸没在储存器中，使得基板表面在浅预定深度处平行于储存器表面。 在中心周围的基板表面上是多个同心圆形电极。 耦合振荡器以时间关系激发电极，使得在墨水储存器表面处产生的毛细管波被加强，使得液滴可以从电极中心处的储存器喷出。
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公开(公告)号：US07305883B2
公开(公告)日：2007-12-11
申请号：US11543550
申请日：2006-10-04
IPC分类号： G01N29/036
CPC分类号： G01N27/221 , G01N1/26 , G01N2001/022 , G01N2291/02863 , G01N2291/0427
摘要： The present invention provides sensors based on micromachined ultrasonic transducer technology. The sensors preferably include a plurality of sensor elements, but may include only one sensor element. Arrays of sensors are also provided. Sensor elements include a functionalized membrane supported over a substrate by a support frame. The functionalized membrane, support frame and substrate together form a vacuum gap. The sensor element is connected to an electrical circuit, which is configured to operate the sensor element at or near an open circuit resonance condition. The mechanical resonance frequency of the functionalized membrane is responsive to binding of an agent to the membrane. Thus, the sensor element also includes a detector, where the detector provides a sensor output responsive to the mechanical resonance frequency of the sensor element.
摘要翻译： 本发明提供了基于微加工超声换能器技术的传感器。 传感器优选地包括多个传感器元件，但是可以仅包括一个传感器元件。 还提供了传感器阵列。 传感器元件包括通过支撑框架支撑在衬底上的功能化膜。 功能化膜，支撑框架和基板一起形成真空间隙。 传感器元件连接到电路，该电路构造成在开路谐振状态或接近开路谐振条件下操作传感器元件。 功能化膜的机械共振频率响应于试剂与膜的结合。 因此，传感器元件还包括检测器，其中检测器响应于传感器元件的机械共振频率提供传感器输出。
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公开(公告)号：US4719476A
公开(公告)日：1988-01-12
申请号：US853252
申请日：1986-04-17
CPC分类号： B41J2/065 , G10K11/36 , B41J2002/14322
摘要： Provision is made for selectively addressing inividual crests of traveling or standing capillary surface waves to eject droplets from the selected crests on command. To that end, the addressing mechanism of this invention locally increase the surface pressure acting on the selected crests and/or locally reduce the surface tension of the liquid within the selected crests. The preferred addressing mechanisms have sufficient spatial resolution to address a single crest substantially independently of its neighbors.Discrete addressing mechanisms having a plurality of individual addressing elements are especially attractive for liquid ink printing and similar applications, not only because their individual addressing elements may be spatially fixed, but also because the spatial frequency of their addressing elements may be matched to the spatial frequency of the capillary wave. Such frequency matching enables selected crests of the capillary wave to be addressed in parallel, such as for line printing. Preferably, the capillary wave for a printer is a spatially stabilized standing wave, so that the crests and troughs of the capillary wave are locked in predetermined spatial locations.
摘要翻译： 提供了选择性地寻址行进或站立的毛细管表面波的单个波峰，以便根据命令从所选择的波峰喷射液滴。 为此，本发明的寻址机构局部地增加作用在所选择的顶部上的表面压力和/或局部地降低所选择的顶部内液体的表面张力。 优选的寻址机制具有足够的空间分辨率以基本上独立于其邻居来解决单个波峰。 具有多个独立寻址元件的离散寻址机制对于液体油墨印刷和类似应用是特别有吸引力的，不仅因为它们的各自的寻址元件可以在空间上固定，而且由于它们的寻址元件的空间频率可以与空间频率相匹配 的毛细血管。 这种频率匹配使得能够平行地寻址毛细波的选定波峰，例如用于线印刷。 优选地，用于打印机的毛细管波是空间稳定的驻波，使得毛细波的波峰和波谷被锁定在预定的空间位置。
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公开(公告)号：US4751529A
公开(公告)日：1988-06-14
申请号：US944490
申请日：1986-12-19
CPC分类号： B41J2/14008 , B41J2002/14322
摘要： A printhead for an acoustic printer comprises one or more acoustic microlenses, each of which brings an acoustic beam to focus approximately at the free surface of a pool of ink for ejecting individual droplets of ink from the pool on demand. As used herein, an "acoustic microlens" is defined as being an acoustic lens having an aperture diameter which is less than an order of magnitude greater than the wavelength of the incident acoustic wave (i.e., the acoustic wave which illuminates the lens).
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公开(公告)号：US4697195A
公开(公告)日：1987-09-29
申请号：US946682
申请日：1987-01-05
CPC分类号： B41J2/14008 , B41J2002/14322 , Y10S310/80
摘要： A nozzleless print head for ink jet printing and the like comprises one or more essentially planar surface acoustic wave transducers which are submerged at a predetermined depth in a liquid filled reservoir, so that each of the transducers launches a converging cone of coherent acoustic waves into the reservoir, thereby producing an acoustic beam which comes to a focus at or near the surface of the reservoir (i.e., the liquid/air interface). The acoustic beam may be intensity modulated to control the ejection timing, or an external source may be used to extract droplets from the acoustically excited liquid on the surface of the reservoir on demand. Regardless of the timing mechanism employed, the size of the ejected droplets is determined by the waist diameter of the focused acoustic beam. To control, the direction in which the droplets are ejected, provision may be made for producing a controllable acoustical asymmetry for steering the focused acoustic beam in a direction generally parallel to the surface of the reservoir.
摘要翻译： 用于喷墨打印等的无喷嘴打印头包括一个或多个基本上平面的表面声波换能器，其在液体填充的储存器中浸没在预定深度处，使得每个换能器将相干声波的会聚锥发射到 从而产生在储存器表面（即，液体/空气界面）处或其附近聚焦的声束。 声束可以被强度调制以控制喷射定时，或者可以使用外部源来根据需要从储层表面上的声吸收液体中提取液滴。 不管所采用的定时机制如何，喷射的液滴的尺寸由聚焦声束的腰部直径决定。 为了控制喷射液滴的方向，可以提供用于产生可控的声学不对称性，以便在大致平行于储存器的表面的方向上转向聚焦的声束。
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公开(公告)号：US4751534A
公开(公告)日：1988-06-14
申请号：US944145
申请日：1986-12-19
CPC分类号： B41J2/14008 , B41J2002/14322
摘要： The output surface of an acoustic printhead having one or more concave acoustic beam forming devices for supplying focused acoustic beams to eject droplets of ink on demand from the surface of a pool of ink is planarized by filling those concave devices with a solid material having an acoustic impedance and an acoustic velocity which are intermediate the acoustic impedance and the acoustic velocity, respectively, of the ink and of the printhead. This not only facilitates the cleaning of the printhead, but also eliminates the edges upon which an optional ink transport or the like may tend to drag. The outer surface of the filler may be essentially flush with the face of the printhead, or the filler may overcoat the printhead.
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公开(公告)号：US4751530A
公开(公告)日：1988-06-14
申请号：US944698
申请日：1986-12-19
CPC分类号： B41J2/14008 , B41J2/155 , B41J2002/14322
摘要： To facilitate the fabrication of acoustic printheads, arrays of spherical acoustic lenses are provided for bringing rf acoustic waves to essentially diffraction limited focii at or near the free surface of a pool of ink. These lenses produce focal patterns which are relatively free of localized amplitude variations, so they may be employed to fabricate acoustic printheads having relatively stable characteristics for acoustic printing.
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