Abstract: A method and system for operating a LiDAR system for an environment detection in a field of view (FOV) of the system, wherein the following steps are performed: detection of at least one temperature measurement, which differs from a loading temperature in at least one light source of the system, estimation of the loading temperature based on the temperature measurement using an evaluation function, specification of an operating limit, which is specific for the maximum thermal load capacity of the light source, provision of a preset for at least one region of interest (ROI) in the field of view (FOV), adjustment of an operation of the system, and based on the preset for the region of interest (ROI) and the estimated loading temperature and the operating limit.

Abstract: A laser diode chip is described, comprising including: an n-type semiconductor region, a p-type semiconductor region, and an active layer arranged between the n-type semiconductor region and the p-type semiconductor region, an n-type contact and a p-type contact, at least one heating element arranged on a side of the laser diode chip facing the p-type semiconductor region, the heating element functioning as a resistance heater, and at least one metallic seed layer, wherein the heating element comprises a part of the seed layer, and wherein the p-type contact is arranged on a further part of the seed layer.

Abstract: An automotive lamp includes a temperature-sensing element having an electrical state that changes according to the temperature T of a semiconductor light source, and a constant current driver that generates a driving current ILED that corresponds to the temperature T. The maximum value of the temperature differential of the driving current ILED in a first temperature range from a reference temperature T0 to a first temperature T1 (T1>T0) is smaller than the maximum value of the temperature differential of the driving current ILED in a second temperature range from the first temperature T1 to a second temperature T2 (T2>T1).

Abstract: The endoscope system includes: a laser diode for an endoscope that emits illumination light whose amount can be controlled; an image pickup device that outputs an image pickup signal of an image obtained by receiving reflected light of the illumination light; a photodiode that receives a part of the illumination light of the laser diode; a thermistor that detects a temperature of the laser diode; a thermistor that detects a temperature of the photodiode; a detection light amount temperature correction circuit that corrects an amount of light received by the photodiode based on the temperature of the photodiode; and a laser diode control circuit that controls driving of the laser diode so that an amount of the illumination light becomes a set value based on a corrected amount of received light corrected by the detection light amount temperature correction circuit and the temperature of the laser diode.

Abstract: The scintillation detector assembly 10 comprises a first scintillation detector 11A of a set SSD of scintillation detectors 11, comprising a first scintillator 12A of a set SS of scintillators 12 and a first light sensor 13A of a set SLS of respective light sensors 13 optically coupled thereto, arranged to detect electromagnetic radiation and output a first signal; a first radiation source 14A of a set SRS of radiation sources 14, configured to emit first gamma radiation G1 of a first set SG of gamma radiation G, having a first reference energy RE1 of a set SRE of respective first reference energies RE; and a controller 15 configured to control a gain of the first scintillation detector 11A based, at least in part, on the first gamma radiation, having the first reference energy, detected by the first scintillation detector 11A.

Abstract: In one embodiment, an electro-absorption modulator receives an optical light from an optical light source and outputs a modulated optical signal. The electro-absorption modulator includes a bias voltage used to set a predetermined modulation performance and an output power of the electro-absorption modulator. A controller measures a photocurrent generated by the electro-absorption modulator and uses the photocurrent as a reference to automatically control the bias voltage of the electro-absorption modulator to maintain the predetermined modulation performance and the output power of the electro-absorption modulator when a detuning change occurs between the electro-absorption modulator and the optical light source throughout the lifetime of transmitters based on an EML device.

Abstract: A system including an optical system having at least one refractive or reflective element, the optical system configured to substantially receive electromagnetic radiation emanating from a source, the optical system being located within a Dewar, a support structure, support structure being mechanically disposed between the optical system and a surface of the Dewar, the support structure having substantially low thermal conductance, a cold source; the cold source being located within the Dewar, a thermal link, the thermal link being mechanically disposed between the optical system and the cold source, the thermal link being substantially flexible and having substantially high thermal conductance.

Abstract: The transmitter module including a semiconductor laser chip, a first carrier, a second carrier, and a lens is disclosed. The first carrier mounts the semiconductor laser chip thereon. The second carrier includes a first surface, a second surface, and a connection surface connecting the first surface with the second surface. The first surface faces in a first direction intersecting an axis direction of the chip to mount the first carrier thereon. The second surface faces in the first direction and is provided at a position farther away from the axis of the chip than the first surface. The lens is fixed to the second surface by an adhesive resin. The connection surface is set back far from a front end of the first carrier adjacent to an emission end of the chip toward a back end of the first carrier opposite to the front end in the axis direction.

Abstract: The electronic device can be used with an accessory module that is a second device attached to a device main body that is a first device. The accessory module includes a locking member that is held so as to be able to be turned. The locking member includes a ring-shaped portion that has a plurality of claw portions and an operation portion for performing a turning operation. The device main body 1 includes a plurality of claw portions corresponding to the plurality of claw portions of the locking member. The claw portions and the claw portions engage with each other in a state in which the accessory module is attached to the device main body by the turning operation of the operation portion, and the claw portions and the claw portions are not engaged in a state in which the accessory module can be removed from the device main body.

Abstract: A load control device adapted to be coupled between an AC power source and an electrical load for controlling the power delivered to the load includes a controller, an actuator for turning the electrical load on and off, an occupancy detection circuit, and an ambient light detector. The load control device automatically turns on the electrical load in response to the presence of an occupant only if the detected ambient light is below a predetermined ambient light level threshold. After first detecting the presence of an occupant, the load control device monitors actuations of the actuator to determine whether a user has changed the state of the load. The load control device automatically adjusts the predetermined ambient light level threshold in response to the user actuations that change the state of the load.

Abstract: The invention provides a photocell system for controlling a street lamp comprising a photocell configured to switch on and off the street light and a Closed Camera Photo Cell configured to collect image data and transmit the data to a remote location.

Abstract: In an example, a system comprises a first optical device, a second optical device, and an optical modulator. The first optical device, in a non-cryogenic environment, receives a light signal, outputs the light signal, receives a first modulated light signal, and outputs the first modulated light signal into the non-cryogenic environment. The second optical device, in a cryogenic environment, receives the light signal from the first optical device, outputs the light signal, receives the first modulated light signal, and outputs the first modulated light signal. The optical modulator, in the cryogenic environment, receives the light signal from the second optical device, modulates the light signal to produce the first modulated light signal and a second modulated light signal, outputs the second modulated light signal, and outputs the first modulated light signal to the second optical device.

Abstract: The present invention discloses a handheld optical radiation meter and a correction method thereof. The handheld optical radiation meter has a photometric measurement module, a spectral measurement module and a screen. The spectral quantities of the spectral measurement module are employed to correct the spectral mismatch error of the photometric measurement module. With simple configuration, the present invention can realize high accuracy photometry and chromaticity measurement within a wide-span dynamic range, and has the characteristics of complete test functions, high measurement accuracy, convenient operation, low cost, etc.

Abstract: Disclosed are optical computing devices that employ birefringent optical elements configured for use in optical computing devices. One optical computing device includes a polarizer configured to generate at least x polarized light and y polarized light, a birefringent integrated computational element configured to optically interact with a substance and the polarizer, thereby generating optically interacted light, and at least one detector arranged to receive the optically interacted light and generate an output signal corresponding to a characteristic of the substance.

Abstract: A load control device adapted to be coupled between an AC power source and an electrical load for controlling the power delivered to the load includes a controller, an actuator for turning the electrical load on and off, an occupancy detection circuit, and an ambient light detector. The load control device automatically turns on the electrical load in response to the presence of an occupant only if the detected ambient light is below a predetermined ambient light level threshold. After first detecting the presence of an occupant, the load control device monitors actuations of the actuator to determine whether a user has changed the state of the load. The load control device automatically adjusts the predetermined ambient light level threshold in response to the user actuations that change the state of the load.

Abstract: A dispensing device for dispensing a defined volume of a liquid from a closed container includes a housing and a spring loaded piston disposed therein. The housing has a holding chamber that includes chamber snap fit elements on the chamber wall, piston stop(s), and a bottom having a central opening with a tubular member extending therefrom. The spring loaded piston includes a push cap including snap fit arms extending from underside of a top pusher and a spring around a piston rod under the top pusher. The device is so configured that engagement modes between arm snap fit elements of the push cap and chamber snap fit elements of the holding chamber control a venting position and an injection starting position of the spring loaded piston, and abutment of the push cap with the piston stop(s) in the holding chamber controls an injection ending position of the spring loaded piston.

Abstract: A single use capillary micropipette and a method of use for dispensing a defined volume of a liquid are disclosed. The capillary micropipette includes a housing, a piston disposed therein and a capillary tube connected to the housing. The housing has a holding chamber including chamber snap fit elements on the chamber wall, piston stop(s) and a bottom having a central opening with a tubular member extending therefrom. The piston includes a push cap having snap fit arms extending downward and a piston rod. In the assembled position, a venting space between the piston head and the central opening permits venting during aspiration of a liquid into capillary tube by capillary force. In response to an applied downward force, the snap fit arms of the push cap snap over chamber snap fit elements and piston rod slides in the tubular member, thereby dispensing a defined volume of the liquid.

Abstract: The invention provides differential refractive index detectors and methods for the use of differential refractive index detectors. In an exemplary embodiment, a differential refractive index detector includes a flow cell body having a proximal end, a distal end, and a flow axis extending between the proximal and the distal end. The flow cell body includes a first chamber and a second chamber and the fluid conduits coupled to the flow cell body can be tapered to reduce dispersion.

Abstract: A device and a method are provided for measuring the moisture in die cast molds, the cavity of which is connected via an evacuation conduit to an evacuation device. The modular assembly of the device is connectable to the evacuation conduit and includes a sensor assembly to measure the moisture of gases evacuated from the mold cavity. The sensor assembly includes an emitter emitting electromagnetic radiation and a detector detecting electromagnetic radiation. On the basis of the measured values obtained during the evacuation action it can be determined whether the amount of a water/release agent mixture jetted into the mold cavity needs to be altered before the actual casting action.

Abstract: An example embodiment includes a thermal conduction system for dissipating thermal energy generated by operation of an optical subassembly that is disposed within a shell of a communication module. The thermal conduction system can include a thermally conductive flexible member that contacts the optical subassembly and the shell of the communication module. By contacting the optical subassembly and the shell, the thermal energy generated by operation of the optical subassembly can transfer from the optical subassembly to the shell. The thermally conductive flexible member defines thermally conductive flexible member holes that correspond to pins extending from the optical subassembly. The pins pass through the thermally conductive flexible member holes enabling the thermally conductive flexible member to contact the optical subassembly.

Abstract: The present disclosure relates to photon detectors. In particular, the present disclosure relates to high sensitivity photon detectors such as semiconductor photomultipliers. A semiconductor photomultiplier is described which comprises an array of interconnected photosensitive microcells; and at least one dark count rate (DCR) suppression element associated with the array.

Abstract: A sheet processing device includes a supporting plate, a stapler, a casing, a protrusion structure, and a swinging arm. The casing is disposed over the supporting plate. A sheet conveying channel is formed between the supporting plate and the casing. The protrusion structure is disposed on a lower surface of the casing, located beside the stapler and accommodated within the sheet conveying channel. During the process of introducing a sheet into the supporting plate, the stapled side of the sheet is flattened by the protrusion structure, and thus the possibility of upturning the sheet is minimized. During the process of introducing the plural sheets to the stapler, the stapled sides of the plural sheets are flattened by the protrusion structure, and thus the formation of the folded corners of the sheets is avoided.

Abstract: A light source apparatus includes a cooling mechanism driving portion for driving a cooling mechanism in such a manner that an element temperature of a light source element which is detected by an element temperature detecting portion reaches a target temperature, and a control portion for calculating a dew point temperature of the cooling mechanism and controlling the cooling mechanism driving portion and a light source element driving portion by using the calculated dew point temperature and the element temperature.

Abstract: A temperature uniformity device controls the temperature and temperature uniformity of an object such as a photovoltaic module undergoing testing. The temperature uniformity device includes a thermal conductivity device and a pliable thermally conductive interface material inserted between the object and the thermal conductivity device.

Abstract: An optical lighting apparatus having a constant luminance with a drive current controlled by a controller unit. A temperature controlled photodetector indirectly monitors the luminance and informs the controller when a change in luminance has occurred so that the controller can make appropriate adjustments to the drive current. Also disclosed is a method of regulating the drive current to a light source to enable the luminance to remain fixed and independent of fluctuations in ambient temperature. A temperature compensated photodetector senses the amount of light reflected off a diffuser lens and feeds back the output to a controller circuit which regulates the drive current to the light source. The lighting apparatus has application in calibrating imaging systems, such as digital cameras, and for scanning devices.

Abstract: An optical module comprising a tunable interference filter including a first substrate, a second substrate facing the first substrate, a first reflective film formed on the first substrate, a second reflective film formed on the second substrate and facing the first reflective film, a gap changing unit changing a gap between the first reflective film and the second reflective film, and a driving electrode line electrically connected to the gap changing unit, a temperature sensor detecting temperature of the tunable interference filter and including a first sensor wiring and a second sensor wiring, the first sensor wiring being electrically connected to the driving electrode line, a switch electrically connected to the second sensor wiring, and a temperature detecting circuit electrically connected to the switch.

Abstract: Bi-directional camera modules and flip chip bonders including the same are provided. The module includes a circuit board on which an upper sensor and a lower sensor are mounted, an upper lens and a lower lens disposed on the upper sensor and under the lower sensor, respectively, and a housing fixing the upper lens and the lower lens spaced apart from the upper sensor and the lower sensor, respectively. The housing surrounds the circuit board. The housing has a plurality of inlets and an outlet through which air flows, and the housing has an air passage connected from the inlets to the outlet via a space between lower lens and the lower sensor.

Abstract: Disclosed are systems and methods for actively controlling the temperature of an integrated computational element used in an optical computing device in order to affect its performance. One method includes providing an integrated computational element configured detect a characteristic of a substance and provide a transmission profile via a detector corresponding to the characteristic, and controlling a temperature of the integrated computational element in order to maintain the transmission profile within an optimal operating range.

Abstract: Disclosed are systems and methods for actively controlling the temperature of an integrated computational element used in an optical computing device in order to affect its performance. One method includes providing an integrated computational element configured detect a characteristic of a substance and provide a transmission profile via a detector corresponding to the characteristic, and controlling a temperature of the integrated computational element in order to maintain the transmission profile within an optimal operating range.

Abstract: A thermal conductivity and phase transition heat transfer mechanism incorporates an active optical element. Examples of active optical elements include various phosphor materials for emitting light, various electrically driven light emitters and various devices that generate electrical current or an electrical signal in response to light. The thermal conductivity and phase transition between evaporation and condensation, of the thermal conductivity and phase transition heat transfer mechanism, cools the active optical element during operation. At least a portion of the active optical element is exposed to a working fluid within a vapor tight chamber of the heat transfer mechanism. The heat transfer mechanism includes a member that is at least partially optically transmissive to allow passage of light to or from the active optical element and to seal the chamber of the heat transfer mechanism with respect to vapor contained within the chamber.

Abstract: A detector device is configured to receive light and generate electrical signals. The detector device includes a housing, a detector disposed in the housing and a cooling component disposed in the housing. The cooling component is at least one of: positioned so as to have a light path extend through the cooling component, where the light path is defined by light that is received for detection; designed so as to include a thermally conductive, electrically insulating intermediate element; and disposed, in direct contact a light sensor of the detector and/or a substrate bearing the light sensor.

Abstract: For an optical transmitter in which an EA modulator modulates a laser beam emitted from an LD, a control circuit stops heating/cooling of the EA modulator when a casing temperature (TC) is within a range of a low-temperature side reference temperature (T_cool) and a high-temperature side reference temperature (T_heat), sets a bias voltage for the EA modulator to a bias voltage corresponding to the modulator temperature based on table information recorded on a memory circuit, heats the EA modulator and sets the bias voltage corresponding to the low-temperature side reference temperature when the casing temperature is equal to or lower than the low-temperature side reference temperature, and cools the EA modulator and sets the bias voltage corresponding to the high-temperature side reference temperature when the casing temperature is equal to or higher than the high-temperature side reference temperature.

Abstract: An optical sensor system is disclosed including a source module, a detection module, and a heating module. The source module includes a source housing unit having a source window member to emit a detection signal through the source window member. The detection module includes a first detection housing unit having a first detection window member spaced apart from the source module. The detection signal received by the detection module corresponds to an amount of volatile organic compounds (VOC) present in a path of the detection signal between the detection module and the source module. The heating module heats the source window member and the detection window member to remove deposit formation of the VOC there from.

Abstract: A method of measuring the temperature of a sheet material in which the sheet material is arranged such that it forms at least one side of a cavity so as to enhance the effective emissivity of the sheet material in the vicinity of the cavity.

Abstract: The primary purpose of the present invention is to provide an fluid circulating installation adapted with a temperature equalization system and fluid transmission duct disposed in a heat carrier existing in solid or liquid state in the nature where presents comparatively larger and more reliable heat carrying capacity. The fluid passes through the solid or gas state semiconductor application installation to regulate the semiconductor application installation for temperature equalization, and flows back to the heat equalization installation disposed in the natural heat carrier of heat for the heat equalization installation providing good heat conduction in the natural heat carrier to provide the operation of temperature equalization regulating function on the backflow of the fluid.

Abstract: Embodiments of a system to maintain an even temperature distribution across a laser detector are generally described herein. In some embodiments, the system includes a multi-layer printed circuit board (PCB) assembly that includes a first layer comprising a thermally-conductive ring provided circumferentially around a thermally-conductive detector region for mounting the laser detector, a second layer comprising a plurality of resistive elements aligned with the thermally-conductive detector region to generate heat, and a fourth layer comprising a thermally-conductive heat-distribution region aligned with the thermally-conductive detector region. A plurality of thermally-conductive vias is provided to couple the thermally-conductive ring of the first layer to the thermally-conductive heat-distribution region of the fourth layer.

Abstract: A wavelength conversion laser light source includes: a fundamental light source for outputting fundamental light; a wavelength conversion element with a nonlinear optical effect for converting the fundamental light into harmonic light of a different wavelength; a first optical receiver for receiving light of a specific polarization direction contained in the fundamental light output from the fundamental light source and converting an amount of light thereof into an electrical signal; a second optical receiver for receiving the harmonic light output from the wavelength conversion element and converting an amount of light thereof into an electrical signal; a temperature holding unit for holding a temperature of the wavelength conversion element constant; a fundamental light control unit for performing first control of controlling an amount of light of the fundamental light output from the fundamental light source based on the electrical signal from the second optical receiver, and second control of controlling

Abstract: A detector apparatus is configured to receive light and generate electrical signals. The detector apparatus includes a light sensor having a light incidence side and a cooling component. The cooling component is in direct contact with at least one of the light sensor, on the light incidence side, or a substrate carrying the light sensor.

Abstract: A detector apparatus is configured to receive light and generate electrical signals. The detector apparatus includes a housing, a detector disposed in the housing and a cooling component disposed in the housing. The cooling component electrically insulates the detector with respect to the housing or is part of an insulator electrically that insulates the detector with respect to the housing.

Abstract: A detector device is configured to receive light and generate electrical signals. The detector device includes a housing, a detector disposed in the housing and a cooling component disposed in the housing. The cooling component is at least one of: positioned so as to have a light path extend through the cooling component, where the light path is defined by light that is received for detection; designed so as to include a thermally conductive, electrically insulating intermediate element; and disposed in direct contact a light sensor of the detector and/or a substrate bearing the light sensor.

Abstract: An optoelectronic detector and method of using same. In order to avoid any condensation on a surface, it has been known to heat such a surface. However, heating an optoelectronic detector will create a stronger hissing noise due to the greater dark current that is caused thereby. The invention is intended to avoid any condensation on an optoelectronic detector without airtight encapsulation. To this end, the detector is cooled and equipped with a sensor for the determination of a current value of one of the variables ambient humidity and ambient dew point temperature and a control unit that is connected with the sensor and designed to control the cooling device in dependence of such a value. By taking into account the ambient humidity or, respectively, the dew point temperature in the control of the cooling device, condensation on the detector can be avoided. An airtight encapsulation of the detector and the cooling device is not required.

Abstract: A flowmeter determines the flow direction of a fluid. The flowmeter has a measuring element, around which the fluid flows and which comprises at least one fiber-optic cable and at least two electrical heating elements that lie adjacent to the fiber-optic cable(s) by a respective heat stream emanating from the respective heating element and directed towards at least one fiber-optic cable, the directions of the heat streams being at least proportionately reversed. In addition, the values of the individual heat streams can be influenced to different extents, depending on the flow direction of the fluid. An electromagnetic wave that can be coupled into the fiber-optic cable(s) can also be influenced according to the temperature of the fiber-optic cable(s).

Abstract: A detector module (20) is described that includes at least one detector (30) for sensing photon radiation, an electronic circuit (40) coupled to the at least one detector (30), and a housing (50) having a first and a second body (60, 70), each having a bottom part (62, 72) and an at least partially cylindrical part (64, 74) extending from the bottom part (62, 72), wherein the at least partially cylindrical part (64) of the first body (60) is thermally coupled with the at least partially cylindrical part (74) of the second body (70), wherein the at least partially cylindrical part (64) of the first body (60) extends towards the bottom part (72) of the second body (70), and wherein the electronic circuit (40) is arranged inside the housing (50). A lithographic apparatus including the detector module (20) is also described.

Abstract: In a circuit (1) for sensing a property of light there are provided a first circuit element (7) that is sensitive to light and that is realized to generate an output signal (I1) during a measurement time period (?tM), wherein the output signal (I1) is generated according to light to which the first circuit element (7) is exposed and the temperature (T) of the first circuit element (7), and a second circuit element (8) that is realized to increase the temperature (T) of the first circuit element (7) during a warming time period (?tW) that precedes the measurement time period (?tM).

Abstract: A highly thermal conductive member is filled in a gap between a base portion and a movable portion of a spring stage in an image shift type imaging apparatus. Heat from a heat generating surface of a cooling element is conducted from the movable portion to the base portion through the highly thermal conductive member, and it is further conducted to an inner lid and discharged to the outside of an imaging apparatus housing.

Abstract: A projector includes: a light source unit configured to emit light; a light source heat absorber configured to cause coolant to absorb heat from the light source unit; an ejector pump configured to allow passage of the coolant having absorbed the heat in the light source heat absorber; a radiator configured to radiate the heat of the coolant flowed out from the ejector pump; an evaporator configured to cool the coolant stored in the evaporator by evaporating the coolant; and a heat source other than the light source unit, wherein the ejector pump decompress the interior of the evaporator by a pressure drop due to the passage of the coolant having absorbed the heat in the light source heat absorber, and heat from the heat sources other than the light source unit is absorbed by the coolant cooled by the evaporator.

Abstract: A light concentrating module for transforming light into at least one of electrical and thermal energy is provided. The light concentrating module may be coupled in flow communication with a fluid conversion module and include a primary optical element that has a reflective surface with a plurality of contoured sections. Each contoured section is shaped to reflect light that impinges the contoured section toward a corresponding focal region. The module may also have a receiver system that includes a plurality of energy conversion members positioned proximate to corresponding focal regions. The receiver system also has a working fluid passage for carrying a working fluid that absorbs the thermal energy. The working fluid can be conveyed away from the receiver system through a mounting post that holds the receiver system. In addition, the module may also generate electricity.

Abstract: A method, process and apparatus for compensating for changes to the gain of photo detectors in a nuclear imaging apparatus is disclosed. Specifically, embodiments detect positron annihilation event pulses using photo detectors. Changes to the gain of the photo detectors are compensated for by determining the relationship of a detected event pulse peak with a target event pulse peak. Based on the difference between these two peaks, a corrected gain is determined in a closed-loop control system. The corrected gain can be used to compensate for temperature changes that can affect the gain of the photo detectors.

Abstract: In one embodiment, a solar collector comprises a solar cell attached with a heat exchanger, and a restraining member attached to the heat exchanger. The restraining member at least partly restrains the heat exchanger when heated. In further embodiments, restraining members and methods are disclosed for at least partly restraining the thermal expansion of a solar collector.

Abstract: Embodiments of a system to maintain an even temperature distribution across a laser detector are generally described herein. In some embodiments, the system includes a multi-layer printed circuit board (PCB) assembly that includes a first layer comprising a thermally-conductive ring provided circumferentially around a thermally-conductive detector region for mounting the laser detector, a second layer comprising a plurality of resistive elements aligned with the thermally-conductive detector region to generate heat, and a fourth layer comprising a thermally-conductive heat-distribution region aligned with the thermally-conductive detector region. A plurality of thermally-conductive vias is provided to couple the thermally-conductive ring of the first layer to the thermally-conductive heat-distribution region of the fourth layer.