Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for a forensic imaging apparatus for documentation, forensic analysis, and reporting of bullet casings. In one aspect, an assembly includes an adaptor for attaching the assembly to a user device, a housing defining a barrel extending along an axis and attached to the adaptor and having an opening that is sufficiently large to receive a firearm cartridge casing, and a holder for holding the firearm cartridge casing at an illumination plane within the barrel. Light sources are arranged within the housing and to direct light to illuminate the illumination plane, the light sources including a first light source arranged to illuminate the illumination plane at a first range of glancing incident angles.

Abstract: A computing system for dynamic forensic data capture and analysis is provided. The computing system may include a processor coupled to a memory to execute forensic analysis detection scheme using a forensic analysis agent of a client node and a forensic analysis module at a networked server node. The processor may be operable to receive a user request for a computer activity and sensed image data associated with the forensic evidence while the client node is coupled within a forensic microscope assembly that optically aligns an image sensor of the client node with the forensic evidence. The processor may also be operable to generate and send ballistic specimen data including images, video, GPS data and the like to the networked server, wherein the processor is operable to generate ballistic imaging metadata. Further, the processor may be operable to detect matching records of spent ballistics and generate a hit report thereby.

Abstract: A computing system for dynamic forensic data capture and analysis is provided. The computing system may include a processor coupled to a memory to execute forensic analysis detection scheme using a forensic analysis agent of a client node and a forensic analysis module at a networked server node. The processor may be operable to receive a user request for a computer activity and sensed image data associated with the forensic evidence while the client node is coupled within a forensic microscope assembly that optically aligns an image sensor of the client node with the forensic evidence. The processor may also be operable to generate and send ballistic specimen data including images, video, GPS data and the like to the networked server, wherein the processor is operable to generate ballistic imaging metadata. Further, the processor may be operable to detect matching records of spent ballistics and generate a hit report thereby.

Abstract: An apparatus and method for improving the capture performance of frequency and phase locked loops. The invention permits improved capture performance while, at the same time, maintaining the signal-to-noise ratio performance of the loop while the loop is tracking. The invention estimates the transient response of an automatic control loop. This estimate is used to control elements added to a PLL to accelerate acquisition, and eliminate the noise contribution of those added elements while the loop is tracking. The system uses the variation in the gradient of the loop transient response to derive an estimate of the loop's distance from lock. The system then uses this estimate to control loop parameters which affect the loop's acquisition.

Abstract: A system and technique is disclosed which enables the measurement and display of aircraft groundspeed using a modified FMCW radar altimeter. The system is constructed to have a conventional FMCW altimeter transmitter and receiver for transmitting and receiving vertical return signals, and a narrowbeam forward-looking antenna and associated receiver for detecting return signals from the forward angle. The transmitted signal is triangularly modulated to produce returns on both the upsweep and downsweep of the modulation and the difference between the frequencies of those returns, as detected by the forward looking antenna, is proportional to aircraft slant velocity. The system also detects slant range and altitude and combines them with slant velocity to produce an output representing the aircraft groundspeed.

Abstract: Interferometer gyro includes a source of light which is divided into two portions. Each of the two portions is modulated with a respective frequency, one being a fixed frequency and the other being a variable frequency. The modulated light portions are then introduced into a fiber optic coil, the rotation of which about an axis of sensitivity is desired to be measured. After the light portions have traversed the optical fiber, they are each again modulated by the respective other frequency, then compared to produce a signal indicating the phase difference therebetween. The phase difference signal is integrated to produce a signal for varying the variable frequency such that the phase difference produced is null. The rate of rotation of the optic fiber about its axis of sensitivity is then determined by the comparison of the fixed and variable frequencies.