Abstract: A projector includes: an operation unit which receives operation by a user; a projection unit which projects light corresponding to an image signal; and a light intensity control unit which controls light intensity of the light projected by the projection unit. The light intensity control unit controls the light intensity in the order of reception of plural operations received by the operation unit from the user.

Abstract: A memory module having a high data processing rate and high capacity is provided. The memory module may include a memory chip, a controller controlling an operation of the memory chip, an optical detector converting an external input signal into an internal input signal to transmit the converted signal to the controller, and an optical generator converting an internal output signal received from the controller into an external output signal. The optical detector converts an external input optical signal into an internal input signal to transmit the converted signal to the controller. The optical generator converts an internal output signal received from the controller into an external output optical signal.

Abstract: A smart camera includes an integrated lighting current controller and can couple to one or more external light sources. The integrated lighting current controller can control and power the one or more external light sources using a current pulse. The one or more external light sources can provide illumination for the smart camera to acquire the image of an object under test.

Abstract: An injection-locked laser is disclosed. The injection-locked laser comprises a seed laser, an oscillator into which a certain component of light output from the seed laser is injected as seed laser light, a frequency converter which shifts a frequency of the remaining component of the light output from the seed laser, a photodetector which detects light obtained by synthesizing the light output from the oscillator and the light output from the frequency converter, and a controller which controls an optical path length of the oscillator based on a beat signal component contained in the signal output from the photodetector.

Abstract: A vehicle rearview mirror system includes an electrochromic transflective reflective element, an ambient light sensor operable to sense ambient light, a glare light sensor operable to sense glare light and a control circuit that is responsive to light detection by at least one of the ambient and glare light sensors and that establishes a reflectance level of the reflective element. The mirror system includes a display element disposed behind the transflective reflective element and operable to display information through the mirror reflector of the reflective element and viewable through the mirror reflector by a driver of the vehicle when the display element is displaying information, and substantially non-viewable by the driver of the vehicle when the display element is not displaying information. The system includes a display intensity control for adjusting display intensity responsive to light detection by at least one of the glare light sensor and ambient light sensor.

Abstract: The invention has a monitoring portion which detects change of ambient temperature and degradation with time, provided with a plurality of monitoring pixels and a monitoring line. Each of the plurality of monitoring pixels has a light emitting element for monitoring, a constant current source, a switch, and a detecting circuit, and one electrode of the light emitting element for monitoring is connected to the monitoring line through the switch. The detecting circuit controls on and off of the switch, and specifically in the case where both electrodes of the light emitting element for monitoring are short-circuited, the switch is turned off. The invention having the aforementioned configuration generates no potential change of the power supply line of the pixel portion when both electrodes of a light emitting element for monitoring are short-circuited.

Abstract: A method includes passing a portion of an optical signal through an aperture of a sensor having a sensing element, wherein the portion of the optical signal that passes through the aperture is an inner portion of the optical signal and the portion of the optical signal that does not pass through the aperture is an outer portion of the optical signal; producing a sensed signal by sensing the outer portion of the optical signal with the sensing element; and controlling the source of the optical signal using the sensed signal. A system for implementing the method includes an optical energy source and a sensor having an optical sensing portion and an aperture therein. The system may also include an optical isolator, a detection element, and a controller for controlling the optical energy source. The system may be used within a MEMS-based system.

Abstract: A system and method provides high speed variable attenuators. The attenuators can be used within a lithographic apparatus to control intensity of radiation in one or more correction pulses used to correct a dose of the radiation following an initial pulse of radiation.

Abstract: Disclosed is a device for optical scanning, comprising: a plurality of photo sensors, where the photo sensors are arranged to detect light incident on the photo sensors, emitted from a light source and reflected from an object subject to optical scanning; wherein the amount of light received at least one of the photo sensors is to a larger extent light transmitted from the light source; and to a smaller extent light reflected from the object.

Abstract: An illumination device includes: a light emitting element to be a light source; a light amount detecting means for detecting the amount of light emitted by the light emitting element; a light emitting element drive means for controlling drive current supplied to the light emitting element so that the difference between the light mount detected by the light amount detecting means and a light amount target value becomes small; a junction temperature detecting means for calculating junction temperature of the light emitting element; and a setting means for setting the light amount target value in accordance with the junction temperature detected by the junction temperature detecting means.

Abstract: A light guiding device is operable to receive incident light emitted by a light source through a capture surface. The received light exits the light guiding device through an exit surface provided adjacent to and aligned with an aperture of light receiver. In this manner, light from the light source can be inserted into the receiver where it may be combined with additional incident light captured by the receiver. The light source might be a projector and the light projected may correspond to operational data relating to the operation of the receiver or images corresponding to data captured by a further receiver device operating with a different form of sensor or in a different region of the spectrum. In order to improve the composite image observed by a user of the light receiving device, the operation of the light source can be controlled to vary the intensity of the light emitted. In one example, this variation can be in response to the ambient light level, as sensed by a suitable sensor.

Abstract: A graphical scanner for scanning a graphical image includes a source for producing an optical beam, a monochromator for dividing the optical beam into a plurality of component beams for hyperspectral bandpasses, a director for directing the component beams to illuminate portions of the graphical image, a sensor for measuring a light intensity for the one or illuminated portions, and a translator for transforming the measured light intensities for each of the one or more portions into hyperspectral traces each representing a spectral power distribution. The translator further transforms the hyperspectral traces into one or more device-independent representations of color.

Abstract: A method is provided for sensing displacement of an optical sensor relative to a surface, the sensor having at least first and second arrays with a plurality of photosensitive elements. The method involves: (i) generating for each array first set of quasi-sinusoidal signals at a first time and a second set of quasi-sinusoidal signals at a second time in response to motion of light received thereon; (ii) computing from said first and second sets of signals phase angle changes for signals received from each array; (iii) computing from said first and second sets of signals radius values for signals received from each array; (iv) computing unwrapped phase angle changes for signals received from each array; and (v) combining said unwrapped phase angle changes for each of said arrays using radius-weighted-averaging to provide a single weighted average of unwrapped phase angle change resulting from said motion of light.

Abstract: A graphical scanner for scanning a graphical image includes a source for producing an optical beam, a monochromator for dividing the optical beam into a plurality of component beams for hyperspectral bandpasses, a director for directing the component beams to illuminate portions of the graphical image, a sensor for measuring a light intensity for the one or illuminated portions, and a translator for transforming the measured light intensities for each of the one or more portions into hyperspectral traces each representing a spectral power distribution. The translator further transforms the hyperspectral traces into one or more device-independent representations of color.

Abstract: A printer for performing a printing operation on a printing medium, includes an optical sensor, operable to detect the printing medium; an emission intensity adjuster, operable to adjust emission intensity of a light-emitting element included in the optical sensor; and an output monitor, operable to monitor an output voltage of the optical sensor so as to control the emission intensity adjuster to adjust the emission intensity.

Abstract: Provided are an illumination sensing apparatus, a driving method thereof and a display device having the illumination sensing apparatus. The illumination sensing apparatus includes an illumination sensor unit configured to generate a sensing signal according to peripheral illumination, an illumination determination unit configured to generate an illumination signal according to the sensing signal, and an illumination judgment unit configured to output a brightness select signal using the illumination signal, wherein the illumination sensor unit controls sensitivity of sensing the peripheral illumination to be varied according to the brightness select signal. Therefore, the sensitivity of an illumination sensor is automatically controlled according to the peripheral illumination, thus improving peripheral illumination sensibility.

Abstract: A system and/or a method read, measure and/or control intensity of light emitted from a light-emitting diode (LED). A light detector may be located in a position adjacent to the LED for reading and/or measuring the intensity of light emitted from the LED. The LED and the light detector may be located in a cavity which may limit exposure of the LED and the light detector to ambient light. The cavity may have an aperture for allowing light emitted from the LED to exit the chamber to illuminate an environment in which the chamber is located. The aperture may be located between the cavity and a compartment, and the LED may emit light through the aperture into the compartment. An additional detector may be located in the compartment and/or may extend from the cavity through an additional aperture into the compartment.

Abstract: A photo reflector (30) includes a circuit board (32) provided with electrode patterns, a light-emitting element (42) and a light-receiving element (44) disposed on the circuit board, a light-transmitting resin sealing the light receiving element (44), and a light shielding member (50) provided on the circuit board to cover peripheral side surfaces of the first light-transmitting resin and the second light-transmitting resin except for upper surfaces thereof. A light-intensity adjuster (60) to adjust the photocurrent is provided on the light-transmitting resin.

Abstract: A method and a device for optimizing the image display on imaging apparatuses register whether an operator is looking at the imaging apparatus. The image display of the imaging apparatus is optimized, when it is registered that the operator is looking at the imaging apparatus and namely by dimming the room lighting and/or by increasing the contrast of the imaging apparatus.

Abstract: A lighting system control device charging system and method including a control device charged from a light source in a lighting system, including control photovoltaic cell 28 responsive to control light 46 from the light source and generating control charging power 44; a capacitor storing the control charging power 44 and generating control supply power 42; and a control microcontroller unit (MCU)/transceiver 24 powered by control supply power 42 and generating a communications signal 40 to the lighting system. The control microcontroller unit (MCU)/transceiver 24 monitors charge state of the capacitor and directs the lighting system to increase the control light 46 when the charge state is below a low charge setpoint.

Abstract: A projection apparatus includes an illuminating unit, an imaging unit, a lens unit, and a control unit. The illuminating unit includes a light source, and a light source driving module operable to drive the light source to provide an illumination beam. The imaging unit is operable so as to modulate the illumination beam into an image beam. The lens unit is disposed on an optical path of the image beam for projecting the image beam. The control unit is coupled electrically to the illuminating unit and the imaging unit. The control unit is configured to execute an activating thread for initializing the imaging unit after controlling initial driving of the light source by the light source driving module, and a monitoring thread for monitoring the light source driving module for a success signal that indicates successful provision of the illumination beam by the light source.

Abstract: A scalable apparatus and a network environment dynamically changes the light transparency of a single SPD device, a small number of SPD devices or thousands of such SPD devices installed in windows in automobiles, aircraft, trains, marine vehicles, residential homes, commercial buildings and skyscrapers. A scalable apparatus and a network environment dynamically changes the light transparency of a single SPD device or thousands of such SPD devices in the presentation of a multi-media special effects display. Textual messages, graphical images and simulated motion effects are driven. Such scalable apparatus being capable of driving and using several operational parameters of SPD materials such as frequency range, AC voltage and temperature so as to provide fine control of SPD characteristics such as switching speed and power consumption.

Abstract: An optical unit includes an optical emitter receiving an optical emitter current, an optical sensor receiving an optical sensor current and light from the optical emitter and in response thereto outputting at least one signal indicating relative movement between the optical unit and an optical code scale, and an optical sensor current detector comparing the optical sensor current to a reference value. In response to the optical sensor current being different than the reference value, the optical sensor current detector outputs an optical sensor current detector signal. The optical sensor current detector signal indicates the presence of a contaminant in a light path from the optical emitter to the optical sensor, and is used to regulate the current to the optical emitter so as to counteract the negative effects of the contaminant in the light path.

Abstract: A lightweight, compact image projection module has a controller operative for causing selected pixels in a raster pattern to be illuminated to produce an image of high resolution of VGA quality in color. The controller has a video data channel for receiving video data from a host, and a control data channel for bidirectionally transmitting and receiving control data to and from the host. A plurality of input communication ports is provided on the controller. Each input communication port is operative for communicating the control data at a different communication standard. A selected one of the input communication ports having a communications standard matching the communications standard of the host is connected over the control data channel to the host.

Abstract: An object detecting system, which is installed in a vehicle, uses a camera comprising an optical lens, a distance measuring image chip, and an illumination device to detect information about an object occupying a vehicle seat. The illumination device is sectioned into a plurality of illuminants, such as a first illuminant and a second illuminant, so that the light emitting modes of the illuminants are controlled to be changed individually.

Abstract: The present invention provides an optical module, a host board, and a method of manufacturing the host board, where the number of man-hours required for manufacture has been reduced. Accordingly, the present invention need not have such type of optical transceiver module as the conventional host board since the host board on which the optical module has been mounted may automatically perform a control corresponding to property data of a light emitting element and a light receiving element by mounting a memory circuit on the optical module. As a result, it may be achieved to provide an optical module, a host board, and a method of manufacturing the host board, where the number of man-hours required for manufacture has been reduced.

Abstract: A lighting panel includes a tile having a first side parallel to a principal plane of the lighting panel, a plurality of solid state lighting devices arranged on the first side of the tile and configured to emit light, a reflector sheet on the first side of the tile, and a brightness enhancement film on the reflector sheet. The reflector sheet may be arranged between the tile and the brightness enhancement film and the brightness enhancement film may be configured to increase the on-axis intensity of emitted light. A luminaire adapted for general illumination includes a lighting panel as described above, a current supply circuit configured to supply an on-state drive current to a string of lighting devices in response to a control signal, a photosensor arranged to receive light from one of the solid state lighting devices, and a control system configured to receive an output signal from the photosensor and to adjust the control signal responsive to the output signal of the photosensor.

Abstract: The invention provides a light-stimulus illumination apparatus comprising a light source for emitting light-stimulus laser light; a scanning unit including at least one acousto-optic device for scanning the light-stimulus laser light emitted from the light source in a direction intersecting an optical axis; and a control unit for controlling the scanning unit. The control unit controls the scanning unit so that the light-stimulus laser light irradiates a plurality of spatially separated regions in a time-division manner.

Abstract: A method for the quantitative real time analysis of fluorescent samples is provided, at which each of the samples is excited to fluoresce by a sample individual light source (12) and the intensity of the light which is emitted by the samples is measured. For a highly precise measurement of even low light intensities for the purpose of reduction of the analysis time, each light source (12) is switched on and off-during a defined interval by a clocked pulse sequence of constant pulse frequency alternately. The measurement of the intensity of the emission light during these intervals is exclusively performed during the switch-on phases of the light, source (12).

Abstract: A device includes a flash unit to generate light, and an optical sensor to receive the light from the flash unit, and generate a light intensity signal based on the received light. The device also includes a controller to generate a modified error signal based on the light intensity signal. The device further includes a control circuit to receive the modified error signal from the controller, receive an output voltage from a power source associated with the device, control the output voltage based on the modified error signal, and provide the controlled output voltage to the flash unit.

Abstract: A method of calibrating a light source used to simulate the sun in solar cell testing apparatus.

Abstract: In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.

Abstract: A device for reproducing three-dimensional data has a plurality of image points(7) that include a plurality of laser light sources(2), in front of which is arranged a lens(4). Since the laser light sources(2) of an image point(7) radiate in different directions, different images can be projected in different radiation directions(12, 13). Since eyes (10, 11) of an observer perceive different images depending on the viewing direction, a spatial visual impression is produced.

Abstract: An optical sampling and control element for use with a luminaire exhibiting a cycle and a frame, the optical sampling and control element being constituted of a color sensor in optical communication with the luminaire; and a sampler connected to the outputs of the color sensor, the sampler comprising an integrator arranged to integrate the outputs of the color sensor over a predetermined period less than the frame.

Abstract: A rod-shaped light guide which does not cause unevenness in color at the portion near an incident face is produced by injection-molding transparent resin such as acryl and its surfaces include a light-emitting surface, a bottom face, left and right sides and end faces. One end face opposes a light emitting unit, and light scattering patterns for scattering light incident from the end face are formed on the bottom face. The light scattering patterns are different in shape between a portion near the end face as the incident face and a portion away from the end face.

Abstract: In a state where a sheet exists, an current I is gradually increased. When an voltage V reaches a light receiving level Vx, the current I at the time is stored as I1. The voltage V immediately before the voltage V reaches the light receiving level Vx is stored as V1. In a state where no sheet exists, the current I is gradually decreased from the above I1. When the voltage V reaches a non-light receiving level Vy, the current I at the time is stored as I2. The voltage V immediately before the voltage V reaches the non-light receiving level Vy is stored as V2. Then, the current I at the time of normal operation is set within a range between I1 and I2. A reference voltage Vs is set within a range between V1 and V2.

Abstract: A laser device (10) includes a first laser source (102) for emitting laser beams with a first wavelength, a second laser source (104) for emitting laser beams with a second wavelength, a dichromic beamsplitter (110), and a flexible light waveguide (112). The dichromic beamsplitter is configured for transmitting laser beams emitted from the first laser source and changing a transmission direction of the laser beams emitted from the second laser source. The flexible light waveguide transmits the laser beams from the dichromic beamsplitter, and the flexible light waveguide has a light-input end (114) and a light-output end (116). The light-input end receives the laser beams from the dichromic beamsplitter, and the light-output outputs the laser beams to a workpiece. A laser system (30) using the same is also provided.

Abstract: A workroom partition divides a workroom interior of a workroom and a workroom surroundings. The workroom is provided with a laser processing device. The workroom partition includes on its inner side facing the laser processing device, a laser beam reflector formed from pre-fabricated reflective sheet of material having a grained reflective surface structure that faces the laser processing device, by means of which the majority of laser radiation incident on the laser beam reflector and originating from the laser processing device is diffusely reflectable.

Abstract: An optical ranging sensor includes an infrared LED encapsulated in a first light-permeable resin section, a light receiving device encapsulated in a second light-permeable resin section, a light-shielding resin member in contact with the first and second resin sections, a drive circuit section for driving the LED, a light receiving device control section for controlling the light receiving device, and a control section for the drive circuit section and light receiving device control section. Under control of the control section, a driving time of the LED coincides with an exposure time of the light receiving device. Further, while the LED is not driven, the light receiving device is also exposed for a time identical to the exposure time. An output difference between outputs at the exposure with driving the LED and at the exposure without driving the LED is calculated, and ranging is performed based on the output difference.

Abstract: The invention relates to a method and a device for operating an optical transmitting device having a plurality of optical transmitters that can be driven independently. The method includes detecting the parameter values of the individual transmitters, comparing the parameter values determined with one another and/or with a prescribed comparison value, and selecting one of the transmitters for the communication operation of the transmitting device based on the comparison. The method further includes operating the transmitting device with the selected transmitter.

Abstract: Systems and methods for inspecting a specimen with light at varying power levels are provided. One system configured to inspect a specimen includes a light source configured to generate light. The system also includes a power attenuator subsystem configured to alter a power level of the light directed to the specimen during inspection between at least two power levels including a full power level and a minimum power level equal to or greater than about 10% of the full power level. In addition, the system includes a detection subsystem configured to generate output responsive to the light scattered from the specimen. The output can be used to detect defects on the specimen.

Abstract: An exemplary light source device (10) includes a power supply (12), a light source (14), and a photodetector (16). The photodetector includes a light sensor (17) and a resistor (18) connected in parallel. The power supply, the light source, and the photodetector are connected in series. When the intensity of ambient light increases, a resistance of the light sensor decreases so as to increase a light intensity of the light source. When the intensity of ambient light decreases, the resistance of the light sensor increases so as to decrease the light intensity of the light source.

Abstract: One embodiment of the present invention provides a system for calibrating a lighting control system. The lighting control system is a daylight-harvesting system that controls the output of the lighting system based on available daylight and/or other light sources to reduce energy usage while providing lighting for an area. The lighting system includes multi-level lighting capabilities for one or more light sources. First, the system measures the light levels for the area when the lighting system: is turned on at a high energy-level; is turned on at an intermediate energy-level; and is turned off. The system determines from these measured light levels the light output of the lighting system in the different states. Then, during operation, the system measures a present light level for the area. The system then adjusts the light output of the lighting system for the area based on a lighting control parameter (e.

Abstract: A lighting panel includes a tile having a first side parallel to a principal plane of the lighting panel, a plurality of solid state lighting devices arranged on the first side of the tile and configured to emit light, a reflector sheet on the first side of the tile, and a brightness enhancement film on the reflector sheet. The reflector sheet may be arranged between the tile and the brightness enhancement film and the brightness enhancement film may be configured to increase the on-axis intensity of emitted light. A luminaire adapted for general illumination includes a lighting panel as described above, a current supply circuit configured to supply an on-state drive current to a string of lighting devices in response to a control signal, a photosensor arranged to receive light from one of the solid state lighting devices, and a control system configured to receive an output signal from the photosensor and to adjust the control signal responsive to the output signal of the photosensor.

Abstract: A radiation imaging apparatus including: a plurality of conversion elements being arranged in one-dimensional or two-dimensional array on a substrate, and converting an incident radiation into an electric signal; and a light source for calibration emitting a light to the conversion elements. During a light output adjustment period for driving the light source, a driving level of the light source is adjusted based on a control signal produced by comparing an output signal from a conversion element with a predetermined initial output signal.

Abstract: An illuminating device and a luminance switching device thereof for controlling luminance of light emitting states of LED light source are provided.

Abstract: A method and device for enhancing the power correction of optical measurements in an optical measurement arrangement, the steps including: providing a light source for producing a light beam; splitting the light beam into two beams; directing a first split light beam through an interrogation area and into an optics separation device; directing the light beams from the optics separation device and a second split light beam representing the intensity of the illumination of the main light beam of the light source into cells of a detector array; measuring and assessing the information obtained in the cells; and using this information to calculate the corrected value for the cells receiving the light beams from the optics separation device in order to adjust the power for the intensity of the light beam of the light source and/or to correct the intensity of the light beams from the interrogation area.

Abstract: A semiconductor light source with optical feedback includes a vertical member extending upward from an upper horizontal surface of a header parallel to a vertical beam projected from a semiconductor light-emitting element mounted on the horizontal surface of the header wherein the vertical member supports a light-sensing element for receiving light reflected transversely from the vertical beam by a beam splitter supported by the vertical member. The vertical beam passing through the beam splitter passes through a window or filter in a cap mounted on the header and covering the light-emitting element, the light-sensing element, the beam splitter, and the vertical member. Substantially all of the transversely reflected light impinges on the light-sensing element and can be used to control the power to the light-emitting element. A simple lens can by used to collimate the beam. Interior portions of the unit are formed from light absorbing materials such as black ceramic, black plastic, anodized aluminum, etc.

Abstract: A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources.

Abstract: A luminous intensity measuring device includes a photoresistor, a number of voltage-dividing resistors, a plurality of comparators, a micro control unit (MCU), and an indicator. The photoresistor is connected to a current-limiting resistor in series between a direct current (DC) power supply and ground. The voltage-dividing resistors are connected in series, and together are connected parallel to the photoresistor and the current-limiting resistor located between the DC power supply and ground. A non-inverting node between the photoresistor and the current-limiting resistor is connected to the non-inverting input terminals of the comparators. The inverting terminals of the comparators are respectively connected to inverting nodes between every two adjacent voltage-dividing resistors. The output terminals of the comparators are connected to the input terminals of the MCU. The indicator is connected to the output terminals of the MCU. The MCU controls the indicator to indicate luminous intensity.