Abstract:
A fiber optic needle probe for measuring or imaging the internal structure of a specimen includes a needle defining a bore, an optical fiber substantially positioned within the bore, and a beam director in optical communication with the optical fiber. At least a portion of the wall of the needle is capable of transmitting light. The beam director directs light from the optical fiber to an internal structure being imaged and receives light from the structure through a transparent portion of the wall. An actuating device causes motion of any, or all of, the needle, optical fiber, and beam director to scan the internal structure of the specimen. The fiber optic needle probe allows imaging inside a solid tissue or organ without intraluminal insertion. When used in conjunction with an OCT imaging system, the fiber optic needle probe enables tomographic imaging of the microstructure of internal organs and tissues which were previously impossible to image in a living subject.
Abstract:
An apparatus for performing high speed scanning of an optical delay and its application for performing optical interferometry, ranging, and imaging, including cross sectional imaging using optical coherence tomography, is disclosed. The apparatus achieves optical delay scanning by using diffractive optical elements in conjunction with imaging optics. In one embodiment a diffraction grating disperses an optical beam into different spectral frequency or wavelength components which are collimated by a lens. A mirror is placed one focal length away from the lens and the alteration of the grating groove density, the grating input angle, the grating output angle, and/or the mirror tilt produce a change in optical group and phase delay. This apparatus permits the optical group and phase delay to be scanned by scanning the angle of the mirror. In other embodiments, this device permits optical delay scanning without the use of moving parts.
Abstract:
An apparatus for performing high speed scanning of an optical delay and its application for performing optical interferometry, ranging, and imaging, including cross sectional imaging using optical coherence tomography, is disclosed. The apparatus achieves optical delay scanning by using diffractive optical elements in conjunction with imaging optics. In one embodiment a diffraction grating disperses an optical beam into different spectral frequency or wavelength components which are collimated by a lens. A mirror is placed one focal length away from the lens and the alteration of the grating groove density, the grating input angle, the grating output angle, and/or the mirror tilt produce a change in optical group and phase delay. This apparatus permits the optical group and phase delay to be scanned by scanning the angle of the mirror. In other embodiments, this device permits optical delay scanning without the use of moving parts.
Abstract:
An inspection lamp for detection of a fluorescent material which absorbs electromagnetic energy in a specific excitation frequency band and which emits electromagnetic energy in a specific fluorescent emission frequency band within the visible light spectrum. The lamp includes a bulb housing, a light source within the bulb housing, and a dichroic filter. The dichroic filter is adapted to transmit electromagnetic radiation in the excitation frequency band of the fluorescent material and reflect electromagnetic radiation in the fluorescent emission frequency band of the material.
Abstract:
A device to locate the position of a communication satellite with respect to a specific site on the earth's surface including a transparent screen having markings to indicate the positions of one or more satellites for that site with respect to a horizontal platform and a north orientation, a table including an arcuate means to mount the screen, a wide-angle viewer fixed to the table with its axis perpendicular to the tangent of the arcuate means at its south position, a compass fixed to the table oriented with north-south parallel to the axis of the wide-angle viewer and a level to indicate when the tabletop is horizontal.
Abstract:
An insolation survey device for determining the exposure of a reference point to a cyclically varying radiation source. The device employs a base member for horizontally supporting a display sheet premarked with a grid calibrated in units corresponding to the measurement being taken. A transparent reflective member is supported by the base member over the display sheet so that a reflected view of the surrounding appurtenances and the view of the display sheet, through the transparent dome, form one composite picture. In the composite picture so formed, the period or periods, if any, within the radiation cycle that the reference point will be exposed to said radiation appear as unobstructed sky superimposed onto the premarked grid. A compass is provided to directionally align the device and means are provided for orienting the base member in a true horizontal plane.
Abstract:
An illumination plotter for plotting illumination characteristics of thoroughfare lighting systems including a vehicle, an adjustable length, horizontally extending, supporting bar mounted on the top of said vehicle, and a pair of light intensity sensing devices mounted on opposite ends of the supporting bar. The sensing devices are connected to an amplifier carried in the vehicle, and the amplifier is connected to a recording system. The sensing devices each have convex, upwardly facing light-sensitive surfaces to obtain maximum exposure to light emanating from above.
Abstract:
A method of Light Detection and Ranging (LIDAR) includes generating a first optical pulse that propagates towards a target and receiving an optical return signal reflected from the target resulting from the generated first optical pulse. The optical return signal is processed to determine a number of additional optical pulses desired to be propagated towards the target to meet a performance criteria. The determined number of additional optical pulses is then generated and propagated towards the target. The additional optical return signals reflected from the target are received and processed to obtain one or more LIDAR measurements.
Abstract:
Systems and methods for detecting and/or identifying target cells (e.g., bacteria) using engineered transduction particles are described herein. In some embodiments, a method includes mixing a quantity of transduction particles within a sample. The transduction particles are associated with a target cell. The transduction particles are non-replicative, and are engineered to include a nucleic acid molecule formulated to cause the target cell to produce a series of reporter molecules. The sample and the transduction particles are maintained to express the series of the reporter molecules when target cell is present in the sample. A signal associated with a quantity of the reporter molecules is received. In some embodiments, a magnitude of the signal is independent from a quantity of the transduction particle above a predetermined quantity.
Abstract:
A beacon device for control by a beacon controller external to the beacon device. The beacon device includes a beacon emitter configured to emit beacon signals, a microcontroller coupled to control the beacon emitter, and a communication module coupled to the microcontroller and configured to transfer signals between the beacon device and the beacon controller.