摘要:
A stereo-imaging device that operates by translating a single lens in front of an exposed imaging sensor, or translating one of the objective lens group for higher image quality. The device and method is used as a surgical instrument guide. An objective lens with a translating lens part can directly attached in front of a camera with an exposed sensor or an endoscopic circuit with an exposed imaging fiber bundle surface to capture/record the image shift generated by the lens translation. The stereo-imaging device can realize a camera which can swing back and forth from regular 2D image capturing mode to the stereo mode to capture images for 3D viewing, or a switchable stereo endoscope without size increases of multiple imaging systems to be used for periodical 3D inspections.
摘要:
The present invention is directed to a device, and method of operation, for a fuel cell which uses bubble-based pumping to self-pump the fuel to the anode, and a single, common channel separating the anode from the cathode through which a mixed fuel and electrolyte flow. The fuel cell includes a single channel having two of its sides formed by the anode and the cathode, each having a suitable catalyst. A bubble generating region is formed in the anode and cathode reaction area of the channel. A one-way valve is located upstream of the bubble generating region. A vent for venting bubbles is disposed over a portion of the channel downstream of the bubble generating region. The fuel cell may be advantageously used to build miniature fuel cells for miniature electronic devices, or scaled to build larger fuel cells for larger electronic devices.
摘要:
A superhydrophobic surface includes a plurality of microfeatures disposed on a substrate and a gas generator disposed within the microfeatures, the gas generator configured to generate a gas within the microfeatures. Gas is generated within the microfeatures when at least a portion of the microfeatures is in a wetted state to restore the microfeatures to a dewetted state. Gas generation is self-regulating in that gas generation automatically starts when a wetted condition exists and stops when sufficient gas has been generated to recover a dewetted state that restores superhydrophobicity.
摘要:
An electrostatically driven high-speed micro droplet switch includes a substrate having an upper surface containing one or more signal electrodes that are selectively connected via a droplet. The switch includes at least one actuation electrode disposed beneath the upper surface of the substrate, the at least one actuation electrode operatively coupled to drive circuitry. The switch includes a frame disposed on or above the upper surface of the substrate that is configured to hold the droplet in substantially the same location during operation of the switch. In one aspect, the frame is configured to absorb variations in the volume of the droplet placed on the switch, leaving the active meniscus not affected by the variation in volume.
摘要:
Disclosed herein are methods of performing microchemical reactions and electro- wetting-on-dielectric devices (EWOD devices) for use in performing those reactions. These devices and method are particularly suited for preparing radiochemical compounds, particularly compounds containing 18F.
摘要:
A method of driving a lens barrel includes detecting a movement detection signal that indicates an operation of the lens barrel which operates using a stepping motor; determining a limit time during which movement of a lens barrel component is detected based on the movement detection signal; detecting the movement from the movement detection signal; and changing a driving level of the stepping motor from a first driving level to a second driving level when movement of the lens barrel component is not detected from the movement detection signal within the limit time, wherein torque of the second driving level is greater than torque of the first driving level.
摘要:
A method of forming a printing pin includes providing a printing pin having an exterior surface and an interior surface that defines a lumen or capillary tract. The pin is treated to render the exterior and interior surfaces hydrophilic. The lumen or capillary tract is filled with a blocking material. The exterior surface of the pin is coated with a hydrophobic material. The blocking material is then removed. The method produces a pin with selective wetting properties. The modified pins reduce solution or reagents use because no excess liquid is picked up on the exterior surface during loading. As a result, no pre-printing operation is needed to remove this excess liquid. Because no pre-printing operation is needed, the pins produce shorter printing times. In addition, due to improved control of liquid loading volume, it is possible to obtain smaller spots as well as more spots in a given run.
摘要:
Methods of improving microfluidic assays are disclosed. Assays can be improved (better signal to noise ratio) by using sessile drop evaporation as an analyte concentration step (enhanced signal) and repeated passes of wash droplets as a means to reduce non-specific binding (noise reduction). In addition multiple massively parallel analyses improve the statistical precision of the analyses.
摘要:
A sputter tray moving system includes a sputter tray, a guide disposed under the sputter tray and including a groove, a pulley engaged with the groove of the guide and a buffer member disposed between the sputter tray and the guide. The sputter tray is moved when the pulley engaged with the groove of the guide is rotated in a rotation direction.
摘要:
A refill droplet facilitates the extraction of a droplet laterally from a channel in a microfluidic apparatus. Such extraction allows a discrete band of separated particles or solute molecules to be excised from a fluid stream and processed and analyzed separately. An extraction point is located along the length of the channel and includes an EWOD surface or similar microfluidic technology to extract a droplet. An opening in the channel opposite the extraction means is equipped with microfluidic technology to transport a refill droplet to the opening. The refill droplet is moved into the channel or column to occupy the area previously occupied by the extracted droplet. This prevents distortion or mixing of the bands of particles or molecules within the channel and prevents the draining of any portion of the fluidic system.