Abstract:
A device for determining the range of a moving object, the device including at least one sampler, a multi-process array coupled with the sampler, and a selector coupled with the multi-process array, the sampler producing a plurality of sampled signals by sampling a received signal respective of a sequence of pulses transmitted toward the moving object, the multi-process array running a plurality of processes, each of the processes associated with one sampler, each of the processes associated with a respective time shift which is determined according to a respective radial velocity assumption of the moving object with respect to the device and with the pulse rate of the sequence of pulses, each of the processes producing a signal summation by sequentially shifting the sampled signals by the respective time shift and adding together the sampled signals, the selector determining the range according to at least one signal summation which includes a summed pulse event.
Abstract:
There is disclosed a method for multi-pixel ranging of a scene, comprising the steps of providing a single detector/receiver associated with a time-delay arrangement; producing a delayed time-arrival distribution of pulse echoes of at least part of a remote scene of a predetermined depth spanning between a closest point and a furthest point from the detector/receiver; receiving the distribution as produced on the ranging plane and conveying it, echo pulse by echo pulse through a plurality of time-ordered echo pulse conveyor to a single detector, while introducing an additional time delay between the conveyor, which is equal to, or greater than, the time delay between the closest and furthest points of the scene, whereby the echo pulses arrive at the single detector/receiver in a sequential order, and using an electronic logic to reconstruct the time-arrival distribution from the time-delayed echo pulses received by the detector/receiver. A system for ranging a scene is also provided.
Abstract:
A passive Q-switch for a laser system, and a method for its production. The laser is operative at near infrared wavelength region, including the eye-safe region. The Q-switch includes a saturable absorber based on IV VI semiconductor nanocrystals (NCs), embedded in a polymer matrix. The NCs preferably include lead selenide or lead sulfide. The NCs may be surface passivated, and may feature a PbSe/PbS core-shell configuration.
Abstract:
Device for producing high frequency modulated light, the device including at least one slowly operated light source being characterized by a maximal operation rate, and at least one micro shutter being located in an optical path to the slowly operated light source, the micro shutter being operative to modulate light passing there through, by alternately moving to an open state and a closed state, at a shutter modulation rate which is greater than the maximal operation rate, thereby producing the high frequency modulated light.
Abstract:
A device for determining the range of a moving object, the device including at least one sampler, a multi-process array coupled with the sampler, and a selector coupled with the multi-process array, the sampler producing a plurality of sampled signals by sampling a received signal respective of a sequence of pulses transmitted toward the moving object, the multi-process array running a plurality of processes, each of the processes associated with one sampler, each of the processes associated with a respective time shift which is determined according to a respective radial velocity assumption of the moving object with respect to the device and with the pulse rate of the sequence of pulses, each of the processes producing a signal summation by sequentially shifting the sampled signals by the respective time shift and adding together the sampled signals, the selector determining the range according to at least one signal summation which includes a summed pulse event.
Abstract:
A humidity sensor and a quartz crystal microbalance (QCM) therefor, for measuring low humidity levels, and a method for preparing same. The metallic surface of the QCM is electroplated with a hygroscopic layer. The hygroscopic layer preferably includes Manganese. A salt is formed on the hygroscopic layer. The salt is preferably salt of Manganese, and most preferably Manganese Chloride (MnCl2).
Abstract:
Device for reflecting light at variable intensity, the device including a variable polarizer for applying a selected polarization to incoming light, a reflector and an optical phase shifter, located between the variable polarizer and the reflector, wherein the optical phase shifter together with the reflector, shift the relative phase between two linearly polarized components of the incoming light which exits the variable polarizer, from a first direction to a second direction, thereby directing phase shifted light toward the variable polarizer, and wherein the variable polarizer applies the selected polarization to the phase shifted light.
Abstract:
There is provided a reflective optical system, including a positive-power primary mirror, a negative-power secondary mirror, a positive-power tertiary mirror, and a folding mirror. The aperture stop of the system is realized by the tertiary mirror, whereby the optical system is rendered non-telecentric.
Abstract:
System for projecting a reticle for an aiming device, the system including a Liquid-Crystal Display module for generating a Liquid-Crystal Display reticle, and a scenery module for obtaining and providing a scenery image, wherein the reticle is superimposed onto the scenery image in alignment with a firing device linked with the aiming device.
Abstract:
Incident image displaying device for displaying at least one incident image against a scene image of a scene, the incident image displaying device including at least one light guide, at least one input beam transforming element, at least one output beam transforming element and a scene image reflector, each of the input beam transforming element and the output beam transforming element being incorporated with a respective light guide, the scene image reflector being located behind the light guide, the input beam transforming element receiving incident light beams respective of the incident image from a respective one of at least one image source, the output beam transforming element being associated with a respective input beam transforming element, the scene image reflector reflecting the scene image through at least a portion of the output beam transforming element, wherein the input beam transforming element couples the incident light beams into the respective light guide as a set of coupled light beams, the set of coupled light beams is associated with the respective input beam transforming element, wherein the output beam transforming element receives from the respective light guide and decouples as decoupled light beams, the set of coupled light beams, thereby forming a set of output decoupled images, and wherein each output decoupled image of the set of output decoupled images is representative of a sensor fused image of the incident image.