Abstract:
Techniques are disclosed for providing the weapon-mounted optical scope that provides for wind sensing and the display a ballistic solution without the need for a separate device. Embodiments may include various additional sensors housed within the weapon-mounted optical scope to provide data for the ballistic solution calculation. Embodiments may further include a display at the input aperture rather than internally at the first-focal-plane, enabling for simpler, more cost effective embodiments. Additionally or alternatively, embodiments may include a laser, separate from the wind sensing laser, to perform range-finding functions, and/or an enhanced-image assembly.
Abstract:
Techniques are disclosed for providing an optical sensor that can be used for wind sensing and an optical scope. The optical sensor can include a photodiode, an electrical switch, a trans-impedance amplifier (TIA), and a capacitive trans-impedance amplifier (CTIA), enabling the optical sensor to perform both wind-sensing and range-finding functions. Some embodiments may include some or all of these components in an application-specific integrated circuit (ASIC), depending on desired functionality.
Abstract:
There are provided an optical receiver and a laser radar including the same. The optical receiver includes a plurality of optical detecting units configured to convert an optical signal reflected from a target into an electrical signal and to output the electrical signal, a signal combiner configured to combine output signals of the plurality of light detecting regions, a plurality of switches provided between the plurality of optical detecting units and the signal combiner, and a controller configured to control the plurality of switches so that the plurality of optical detecting units are selectively connected to the signal combiner based on whether the optical signal to reflected from the target is input. Therefore, it is possible to make a module small, to improve stability and reliability, and to reduce a signal to noise ratio.
Abstract:
The invention relates to a method for determining height information of a sample, and to a scanning microscope. The method comprises the following steps: generating an illumination spot; illuminating the sample with the illumination spot; capturing an image of a reflection of the illumination spot at the sample; evaluating the lateral distribution of the image; determining the height information from the lateral distribution; wherein the illumination spot has a three dimensional illumination pattern and/or the image in a detection beam path has a three dimensional detection pattern. The scanning microscope is characterized in that an illumination device (07) and/or a detector device comprise(s) a means for generating a three dimensional pattern with a change in the lateral intensity distribution that is asymmetrical along the optical axis, and an evaluation device is configured to determine height information from the detector signal.
Abstract:
A current detection module capable of differentiating and quantifying contribution to a current signal generated by a sensor in response to stimulation by a certain target source from contributions from sources other than the target source (ambient sources) is disclosed. As long as the contribution from the target source comprises a pulsed signal, the module may synchronize itself to the pulse(s) so that there is a predetermined phase relationship between the pulse(s) and functions carried out by various stages of the module. The module may be re-used to also detect and quantify contributions from ambient sources by presenting these contributions to the module as pulses that trigger synchronization of the module. To that end, a detection system disclosed herein is based on the use of such current detection module and allows mode switching where, depending on the selected mode of operation, the module is configured to perform different measurements.
Abstract:
A light receiver capable of detecting the intensity of light in a certain wavelength range is provided. The light receiver includes a first light receiving element (PD1) and a second light receiving element (PD2) that have an identical spectral sensitivity characteristic, and a UV cut filter (11). Light that has passed through the UV cut filter (11) enters the first light receiving element (PD1). A subtractor is provided that calculates a difference between a photocurrent of the first light receiving element (PD1) and a photocurrent of the second light receiving element (PD2).
Abstract:
A method of detecting an optical signal, comprising the steps of: providing an avalanche photodiode (APD) comprising a multiplication region capable of amplifying an electric current, said multiplication region, in operation, having a first ionization rate for electrons and a second ionization rate for holes, wherein said first ionization rate is different in magnitude from said second ionization rate, and exposure to the optical signal causes an impulse response; exposing the APD to a modulating optical signal; providing an external circuit that induces an APD bias to the multiplication region; providing an external circuit for amplifying and processing an electric signal from the avalanche photodiode; and modulating the APD bias in a manner that is correlated with the optical signal.
Abstract:
An optical receiver module including: two amplifier arrays in each of which transimpedance amplifiers and first capacitors are arranged in an alternating manner, and an optical detector array, located between the two amplifier arrays, in which a plurality of optical detectors are aligned, wherein the plurality of optical detectors are coupled in an alternating manner to one of the transimpedance amplifiers of one of the two amplifier arrays and to one of the transimpedance amplifiers of the other of the two amplifier arrays, and for each specified optical detector of the plurality of optical detectors, the specified optical detector is coupled to one of the first capacitors of a second amplifier array of the two amplifier arrays, the second amplifier array being different from a first amplifier array that includes one of the transimpedance amplifiers to which the specified optical detector is coupled.
Abstract:
Techniques are disclosed for laser-based bore sighting, enabling wind sensing to be performed on captured images of the laser spot. Techniques can include image averaging, background subtraction, and filtering to help ensure that the Gaussian laser spot is detected in the image. Embodiments may include defining a bounding region and altering the operation of a camera such that the camera does not provide pixel data from pixels sensors corresponding pixels of outside the bounding region in subsequent image captures. Embodiments may additionally or alternatively include extracting two stereoscopic images from a single image capture.
Abstract:
A method and system for optoelectronic receivers utilizing waveguide heterojunction phototransistors (HPTs) integrated in a wafer are disclosed and may include receiving optical signals via optical fibers operably coupled to a top surface of the chip. Electrical signals may be generated utilizing HPTs that detect the optical signals. The electrical signals may be amplified via voltage amplifiers, or transimpedance amplifiers, the outputs of which may be utilized to bias the HPTs by a feedback network. The optical signals may be coupled into opposite ends of the HPTs. A collector of the HPTs may comprise a silicon layer and a germanium layer, a base may comprise a silicon germanium alloy with germanium composition ranging from 70% to 100%, and an emitter including crystalline or poly Si or SiGe. The optical signals may be demodulated by communicating a mixer signal to a base terminal of the HPTs.