摘要:
A backlight system for a display device which comprises a light emitting diode comprising an encapsulating lens and an aspheric lens interposed between the light emitting diode and the display device. The backlight system provides a luminance of substantially 100K nits at a cone angle of substantially 12° and is of particular utility in conjunction with laser-based range and speed measurement instruments.
摘要:
A tail dock anti-collision system for augmenting positioning of an aircraft in a maintenance facility which comprises lateral alignment sensors disposed on opposing sides of the aircraft and a backup tracking sensor directed toward the tail section. A processor, for example a programmable logic controller, is coupled to, and operatively controls, the sensors to provide an indication to a principal guide of the aircraft docking procedure of the relative position of the aircraft with respect to a centerline and platform of the maintenance facility.
摘要:
A laser sensor module array for vehicle identification, speed monitoring and traffic safety applications. Each of the laser sensor modules comprise a laser signal transmitting and receiving port with the array comprising a basic row of N laser sensor modules, wherein N is greater than 1 and wherein each of the N laser sensor modules in the basic row is displaced at an acute angle with respect to adjacent ones of the laser sensor modules. An additional row of N laser sensor modules may adjoin the basic row of N laser sensor modules in a parallel or acute angular relationship to corresponding ones in the basic row.
摘要:
A non-saturating receiver design and clamping structure for high power laser rangefinders of especial utility with respect to pumped, monoblock lasers. The receiver comprises a photodiode and a transimpedance amplifier having at least first and second stages. The first stage comprises a field effect transistor and the second stage comprises a non-saturating, non-inverting amplification stage including a differential pair of bipolar transistors having a feedback path coupling the second stage to the input of the first stage. A clamping structure for the receiver comprises a resistor coupling a cathode of the photodiode to a first voltage input and a clamping diode also coupling the cathode to a second lower voltage input. A capacitor having a capacitance Cs couples the cathode of the photodiode to a reference voltage line, wherein the capacitance Cs is greater than the capacitance of the photodiode CD.
摘要:
Disclosed herein is a handheld speed gun incorporating automatic number plate recognition (ANPR) functionality. As the image size of a vehicle license plate varies depending on its distance from the speed gun, in the present invention the distance to the target vehicle is known through the functionality of the laser sensor so the size of the pixels for the number plate can be estimated. Since the image of the number plate may be tilted in a handheld device, the present invention compensates for this by use of the instrument's tilt sensor or through other compensation by use of the image itself.
摘要:
A through-the-lens, co-aligned aiming system for a phase-type, laser-based distance measuring device incorporating a co-aligned aiming system with an in-scope, view through LCD display.
摘要:
Apparatus for projecting a pattern includes a laser source, a collimating lens and a diffractive optical element (DOE) to diffract the collimated laser beam into a specific dot pattern for sensing the depth of a three dimensional (3D) surface.
摘要:
A system and method for determination of origin displacement for a laser rangefinding instrument which comprises laser transmitting and receiving sections coupled to a processor section. The processor section is configured to calculate ranges from the instrument to first and second target coordinates and to compensate for displacement between disparate first and second origin points in order to determine a distance between these target coordinates.
摘要:
A system and method for a rangefinding instrument incorporating pulse and continuous wave signal generating and processing techniques for increased distance measurement accuracy. The use of the former technique effectively solves the ambiguity issues inherent in the latter while allowing for relatively simple circuit implementations. Thus, a potentially more accurate phase-based distance measurement technique can be utilized which is also completely independent of the maximum range to the target.