Abstract:
A signal evaluating device includes a binarizing device binarizing an input signal, a run length measuring device measuring a run length of a sign when there is a change in the sign that is the result of binarization of the input signal during an evaluating interval, using an output of the binarizing device as input, and an evaluating device calculating, from a measurement results of the run length measuring device, a distribution wherein a noise frequency distribution included in the input signal during the evaluating interval is assumed to be a geometric distribution, and evaluating whether or not the input signal is valid from a proportion of a total frequency of noise, obtained from the calculated distribution, and a total frequency that is the number of run lengths in the evaluating interval.
Abstract:
A light detector includes: a light receiving device having a central optical axis and first and second directions perpendicular thereto, the light receiving device detecting incident light; a first light shield provided on a light incident side of the light receiving device and disposed on one side in the first direction with respect to the light receiving device; and a second light shield provided on the light incident side of the light receiving device and disposed on the other side in the first direction with respect to the light receiving device, wherein the first and second light shields form a light incident slit over an angular range including the direction in which the central optical axis of the light receiving device extends, and the width of the slit increases as the angle with respect to the central optical axis of the light receiving device increases.
Abstract:
An antenna system is disclosed. The system comprises a first end-fire antenna element and a second end-fire antenna element facing each other in a planar arrangement, the antenna elements being configured such as to cause destructive interference between individual end-fire radiations of the elements, while maintaining constructive interference generally perpendicular to the planar arrangement.
Abstract:
Exemplary embodiments can be used in a replicating system to guide source electromagnetic waves, such as infrared (IR) radiation, from an emitter of a reflective-type sensor towards an object held on a support mechanism and to guide reflected electromagnetic waves that are related to the source electromagnetic waves to a receiver of the reflective-type sensor. The height of the support mechanism can be adjusted based on whether the object is detected.
Abstract:
A shadow band assembly includes a platform and an arcuate shadow arm extending upward from the platform and terminating in a free end above the platform. A sun sensor mounting location is located below the free end of the shadow arm. The arm is preferably further supported by a vertical strut. According to other embodiments, the arm is hollow and contains a fluid conduit and/or an electrical cable. A sun sensor may be mounted on top of the free end of the arm and a fluid nozzle may be mounted under the free end. A shadow band pyranometer includes the shadow band assembly, a sun sensor mounted at the mounting location and a motor drive coupled to the platform for azimuth tracking. Additional sensors with zenith tracking may also be provided.
Abstract:
A high-speed optical measurement apparatus includes an objective lens unit, an optical path unit, a control circuit unit, a measurement sensor, an eyepiece unit, and a measurement sensor connection. The objective lens unit adjusts the magnitude of the overall light of the individual locations of the object or the set of multiple objects, and allows the light to make its entrance. The optical path unit changes the path of the incident light. The control circuit unit outputs a control signal which is used to change a direction of the light by controlling the optical path unit. The measurement sensor measures the incident light. The eyepiece unit conforms the light to the size and location of the measurement sensor. The measurement sensor connection fastens the measurement sensor so that the light incoming through the eyepiece unit is aligned with the measurement sensor.
Abstract:
A method and system for coupling optical signals into silicon optoelectronic chips are disclosed and may include coupling one or more optical signals into a back surface of a CMOS photonic chip in a photonic transceiver, wherein photonic, electronic, or optoelectronic devices may be integrated in a front surface of the CMOS photonic chip. Optical couplers, such as grating couplers, may receive the optical signals in the front surface of the chip. The optical signals may be coupled into the back surface of the chips via optical fibers and/or optical source assemblies. The optical signals may be coupled to the optical couplers via a light path etched in the chips, which may be refilled with silicon dioxide. The chips may be flip-chip bonded to a packaging substrate. Optical signals may be reflected back to the optical couplers via metal reflectors, which may be integrated in dielectric layers on the chips.
Abstract:
The ultraviolet ray sensor measures the intensity of ultraviolet rays irradiated to the ultraviolet ray receiving surface. The CPU performs control to measure ultraviolet intensity in a case in which the ultraviolet ray receiving surface of the ultraviolet ray sensor faces in a predetermined direction.
Abstract:
A light source device 1 includes a laser light source 10 and an optical phase modulator 15 or the like. The optical phase modulator 15 inputs coherent light output from the laser light source 10 and transmitted through a beam splitter 14, phase-modulates the light according to the position on a beam cross section of the light, and outputs the phase-modulated light to the beam splitter 14. When (p+1) areas sectioned by p circumferences centered on a predetermined position are set on a beam cross section of light input to the optical phase modulator 15, the more outside each of the (p+1) areas is, the wider the radial width of the area, the amount of phase modulation is constant in each of the (p+1) areas, and the amounts of phase modulation differ by π between two adjacent areas out of the (p+1) areas.
Abstract:
A wireless battery-powered daylight sensor for measuring a total light intensity in a space is operable to transmit wireless signals using a variable transmission rate that is dependent upon the total light intensity in the space. The sensor comprises a photosensitive circuit, a wireless transmitter for transmitting the wireless signals, a controller coupled to the photosensitive circuit and the wireless transmitter, and a battery for powering the photosensitive circuit, the wireless transmitter, and the controller. The photosensitive circuit is operable to generate a light intensity control signal in response to the total light intensity in the space. The controller transmits the wireless signals in response to the light intensity control signal using the variable transmission rate that is dependent upon the total light intensity in the space. The variable transmission rate may be dependent upon an amount of change of the total light intensity in the space. In addition, the variable transmission rate may be further dependent upon a rate of change of the total light intensity in the space.