摘要:
The invention provides for surface mapping of in-vivo imaging subjects using a single camera and an illuminator that projects a plurality of targets such as spots on the subject. By limiting the depth-of-field of the camera lens, or of the illuminator optics, or both, a spatial plane is defined in which the spots are most sharply in focus. Controlled displacement of this plane relative to the subject is achieved through movement of the mechanical stage on which a subject is placed; or through movement of the best-focus plane by adjustment of the camera, lens, or illuminator optics. Images are taken at several relative positions of the best-focus plane and the subject, and the height of individual points on the subject is determined through analysis of focus, given the known displacements. A mesh or other surface can be constructed from individual point locations, to provide a surface map of the subject. Accuracy of 0.5 mm can be readily attained for mice and similarly sized subjects.
摘要:
An optical filter assembly having selectable bandwidth is presented. The optical filter assembly includes a first optical filter, a first optical retarder with optical retardance R1, a second optical retarder with optical retardance R2, a polarization switch positioned between the first and second retarders which causes their retardances to substantially add in a first switch setting and to substantially subtract in a second switch setting, and an exit polarizer. A multispectral imaging system using tunable optical filters having selectable bandwidth is presented. A method of filtering light is also presented. The method includes providing a first optical filter, providing a dynamic bandwidth stage including a polarization switch, selecting a first setting of the polarization switch, and producing a first filter action for light passing through the first filter and the dynamic bandwidth stage.
摘要:
A method of identifying a valid version of a data value and voting on separate instances of the data value is described. A processor receives an instance of the data value generated by one processor and a transmitted version of that generated instance transmitted by another processor and compares the received values to validate them. The processor further determines an agreed version of the data value from a comparison of the validated instances. As a result a simple and robust voting system is provided.
摘要:
An electronic system comprising a system to be monitored (2) and a plurality of fault-monitoring systems (4, 6) each of which is adapted to output a fault signal when an input indicates that the electronic system is in a fault condition associated with the fault-monitoring system. The fault-monitoring systems are arranged in a cascade fashion such that a fault signal output from one fault-monitoring system (4) is provided as an input to a subsequent fault-monitoring system (6) in the cascade of fault-monitoring systems to simulate a fault condition associated with the subsequent fault-monitoring system. The output of the final fault-monitoring system in the cascade gives an indication of whether there is a fault with any of the fault-monitoring systems.
摘要:
An interface circuit (100) and method for interfacing received digital signals, relative to a first ground potential, for transmission on the bus, relative to a second ground potential. A transformer (106) passes edges of the received digital signals. A Schmitt trigger (110) reconstructs signals from the edges of signals passed by the transformer, so as to produce digital signals, for transmission on the bus, relative to the second ground potential. The Schmitt trigger bias points may be set by an oscillators incorporating another Schmitt triggers (120) located on the same semiconductor die to reduce temperature variability.
摘要:
A knotless suture anchor and method for its insertion into tissue are provided. The suture anchor includes an inner member including a proximal shaft and a distal securing member shaped to secure the inner member to the tissue, the proximal shaft including a first locking part and at least one hole extending therethrough for receiving the suture thread; and a collar member including an axial bore shaped to receive the proximal shaft of the inner member, a second locking part, and at least one hole extending therethrough and assigned to the hole of the proximal shaft of the inner member, the collar member being axially slidable into unlocked and locked positions relative to the proximal shaft of the inner member, the collar member being relatively axially slidable into the locked position only to secure the suture thread. The hole of the collar member is aligned with the hole of the proximal shaft of the inner member when the collar member is placed into the unlocked position, the hole of the collar member is misaligned with the hole of the proximal shaft of the inner member when the collar member is placed into the locked position, and the first locking part of the proximal shaft engages with the second locking part of the collar member to axially lock the collar member with respect to the proximal shaft when the collar member is placed into the locked position.
摘要:
In a circuit, switch (1) switches a current from a reference voltage terminal through an inductive element (3). The energy stored in the magnetic field associated with the inductive element when a current is flowing is transferred on interruption of the current either capacitively or inductively to an energy storage element (4). The stored energy is then returned to re-energize the inductive element (3) when the current flow is restored by the switch (1).
摘要:
An interactive audio-visual (A/V) transceiver is advantageously coupled to a television and/or telephone (T/T) cable, a TV, a video recorder (VCR), and other A/V devices. The A/V transceiver switches data between a program/service provider and the connected A/V devices. In one embodiment, the transceiver includes three primary modules, a main module including a CPU, a system bus, system memory, an infra-red (IR) control unit, an audio-visual bus, an A/V decoder, an A/V processor, and an A/V encoder, an A/V connect module including a number of tuner/demodulators and a switch, and an optional CD ROM module. The A/V transceiver hardware is complemented with an operating system and software program which supports the functions provided in the A/V user interface. Additionally, a remote control device is provided to communicate with the A/V transceiver to interactively manage selection of program and service sources, selection program and service offerings from any selected source, viewing of selected program offerings, and interaction with selected service offerings. The remote control device is advantageously provided with a basic A/V control button group, an interactive control button group, an auxiliary control button group and a numeric key pad to facilitate control of the transceiver. The interactive control button group includes an info button, a list button, a categories button, a pix button, a mark button, a jump button, and a pointing device consisting of up, down, left, and right arrow buttons, and a center select button.
摘要:
An alarm system is provided in which an alarm condition causes a cellular transceiver automatically to transmit a telephone call to an alarm monitoring station by over-the-air transmission of a signal to a cellular site. A computer at the cellular site will cause communication between the cellular transceiver and an alarm company monitoring station. The alarm system includes a digital communicator with an alarm signal line connected to the digital communicator. The digital communicator is coupled to a cellular transceiver having a programmed keyboard, an audio input and an audio output. The digital communicator has an audio output and an interrogation input. The digital communicator's audio output is coupled to the cellular transceiver's audio input. The cellular transceiver's audio output is coupled to the digital communicator's interrogation input. The digital communicator includes a transmit enable output and a receive enable output. The cellular transceiver includes a transmit enable data line and a receive enable data line. The transmit enable output is coupled to the transmit enable data line and the receive enable output is coupled to the receive enable data line. An alarm signal received by the digital communicator causes the transmit enable output to transmit a signal to the transmit enable data line thereby enabling the cellular transceiver to transmit the telephone call via over-the-air transmission to the cellular site from where it is relayed to the alarm monitoring station.
摘要:
A bollard that supports a door with a top bearing, middle bearing and bottom bearing with the middle and bottom bearing offset from the bollard and a rigid structure molded in the door.