Abstract:
An optically based resonating sensor useful for detecting and discriminating specified substances present in the environment is provided. The resonating sensor comprises a light source and a coupler adapted to allow light to pass from the light source to a resonator wherein the light is stored for a specified period of time. The resonator is coupled to the coupler such that some portion of the light passing through the coupler enters the resonator and some portion of the light resonating within the resonator exits the resonator to the coupler. The outer surface of the resonator is modified such that the interaction of the modified outer surface of the resonator with a specified substance in the environment alters some characteristic of the light flowing through the sensor system. A detector is arranged to observe and detect the interactions between the modified outer surface and the light flowing through the system.
Abstract:
A background rejection circuit uses the harmonic content of an angularly narrow target to produce a signal. The signal is used to modulate an externally derived audio signal to produce a target indication signal free of background noise.
Abstract:
A charging/discharging circuit comprises a PNP transistor controlled by a diode, an NPN transistor arranged on a discharging path and controlled by at least one photodiode, and a capacitor arranged between a photodiode and the NPN transistor. During charging stage, a charging current flows through the diode to produce a voltage drop, which cuts off the transistors to prevent leakage current. The photodiode generates a photo current such that the capacitor presents a negative voltage on one contact thereof, which facilitates the discharging process.
Abstract:
A photo receiver branches a data signal obtained by photoelectric conversion and supplies the signal to a signal cutoff detector. Depending on the degree of an autocorrelation of a data signal obtained by an autocorrelation detector, the signal cutoff detector detects abnormality/normality. Depending on a level of a control signal to a VCO contained in a frequency phase-locked loop for use in clock generation, an out-of-synchronization detector makes determination of abnormality/normality. Outputs of both the detectors are ORed at an alarm processor and when at least one of the detectors detects abnormality, the detector generates an alarm.
Abstract:
An optical fiber sorter system (10) includes a measurement system (14) operable to determine a measurement characteristic of an optical fiber. The system (10) also includes a guide system (12) operable to direct the optical fiber to a measurement position (54) relative to the measurement system (14). The system also includes a collection system (16) disposed adjacent an outlet (126) of the guide system (12). The collection system (16) includes a plurality of receivers (24) for receiving the optical fibers from the guide system (12). The system further includes a controller (18) operable to automatically position a particular receiver (24) of the collection system (16) adjacent the outlet (126) of the guide system (12) corresponding to the measurement characteristic of the optical fiber.
Abstract:
In an image-sensing apparatus, shading data obtained when a sensor 1 is irradiated with uniform light is compressed by a COM 6 and is then stored in a memory 3. During image sensing, the data stored in the memory 3 is decompressed back into the shading data by an EXP 7. By a COR 4, this shading data is subtracted from the image data obtained from the sensor 1, and thereby the unevenness in the outputs from the individual pixels of the sensor 1 is corrected.
Abstract:
A microsensor including a VCSEL for use in a MEMS. By coupling the top mirror of the VCSEL to the micromechanical structure, either directly or indirectly, the motion of the micromechanical structure in response to a physical phenomenon can directly modulate the wavelength of the light emitted from the VCSEL. Also, a method for sensing and transmitting information about the configuration or motion of a mechanical structure. The method includes coupling the top mirror of a VCSEL to the mechanical structure that directly encodes information about the motion into the frequency of light emitted by the VCSEL.
Abstract:
A CMOS-based voltage signal amplifier is particularly useful for amplifying signals from a single photodiode, or a small set of photodiodes, within a large photosensitive imaging device. When the imaging device reads out image signals from a large number of photodiodes, each amplifier is selected for operation only within a very brief time window when the particular photodiode associated therewith is reading out. The amplifier of the present design is suitable for rapid power-up and power-down when it is selected and deselected.
Abstract:
A device controller synchronizes a counter to the detection of sunrise or sunset by photoelectrically sensing daylight, thereby establishing an approximate time reference for scheduling the timing of device activations to occur at any time of day or night. An uncalibrated method of measuring sunlight yields more reliable scheduling, relative to sunrise and sunset events. The integral approximate time reference is kept synchronized, even if occasional faults in detection of sunrise or sunset occur. The rules employed to establish and maintain synchronization, and the dynamically variable rules of evaluating changes in light intensity, contribute to the reliable performance of the controller apparatus. Inherently self-adapting and automatic, a potentiometer for setting a time parameter input and a push-button for setting a time parameter input are combined in the apparatus in such a way to yield further utility without complicating the programmability. Additionally, for animal feeder applications, a test mode utilizes a modulates activation of the feed motor to produce audible warning of imminent motor activation.
Abstract:
An emitter lens is provided between the radiation source and the work surface to be illuminated. The emitter lens collects radiation and reshapes the illumination pattern to increase intensity and uniformity. The radiation source and emitter lens have associated housings which act to properly orient and align the emitter lens and radiation source. The emitter lens also acts to space the radiation source from an aperture in a housing of the computer input device to provide protection against damage due to electrostatic discharge (ESD). An imaging lens is provided between the work surface and the image sensor to focus light reflected from the work surface onto the image sensor. An imaging lens housing or holder is provided to properly orient and align the imaging lens with the image sensor. The imaging lens housing provides an apron which increases ESD discharge path length. The imaging lens housing also provides bias members and a lens/sensor interface which act to accurately locate the imaging lens closely proximate the image sensor.