A welding helmet can record a welding time based on an arc intensity detected by a sensor mounted on the helmet. A configured level is compared with the arc intensity detected by the sensor to determine a welding duration. Individual welding times from multiple welding instances can be accumulated over a period of time to provide a total welding time for an operator. The total welding time may be stored in the welding helmet.

A method for producing a hermetically gastight optoelectronic or electro-optical component with great robustness to heat and moisture is described. A housing cap is connected to a carrier in a hermetically gastight manner. Orifices in the housing cap are closed in a hermetically gastight manner by a window element. An electronic component with a housing has a housing cap, a carrier as base plate of the housing, and an interior space enclosed by the housing cap and the carrier. An optoelectronic or electro-optical converter element is arranged in the interior space. The housing cap is closed in a hermetically gastight manner by the carrier through a bonding connection of fused metal. The orifice is connected to the housing cap in a hermetically gastight manner by a window element along an edge metallization of the window element by a circumferential first seam of a fused metallic material.

A low-jitter digital clock signal generating system which uses optical pulses output from a pulse laser includes a first balanced photodetector that converts first and second optical pulses with a delayed time interval into first and second electrical pulses through first and second photodiodes and outputs first and second modulated pulses generated by allowing the first and second electrical pulses to partially overlap each other, a second balanced photodetector that converts third and fourth optical pulses with the delayed time interval into third and fourth electrical pulses through third and fourth photodiodes, and outputs a second modulated pulse generated by allowing the third and fourth electrical pulses to partially overlap each other, and a capacitor. The capacitor is charged by the first modulated pulse, is discharged by the second modulated pulse, and outputs a voltage according to the charging and discharging as a clock signal.

In a first pixel part, as an incident position is closer to a first end of a first pixel pair group in a second direction, an intensity of a first electric signal decreases. In a second pixel part, as the incident position is closer to the first end, an intensity of a second electric signal increases. In a third pixel part, as the incident position is closer to a second end of a second pixel pair group in a first direction, an intensity of a third electric signal decreases. In a fourth pixel part, as the incident position is closer to the second end, an intensity of a fourth electric signal increases. A calculation unit performs weighting on a first position on the basis of the third and fourth electric signals, and performs weighting on a second position on the basis of the first and second electric signals.

Filter wheel assemblies with a single actuation point to control positioning of front and rear optical filter elements simultaneously and to provide high channel density with a plurality of selectable optical filter pairs. A filter wheel assembly may include a plurality of optical filter element pairs arranged around a common axis, wherein each of the plurality of optical filter element pairs includes a first filter element and a complementary filter element, wherein each first filter element and each complementary filter element has a surface having a normal component directed toward an inner portion of the filter wheel assembly.

[Task] To provide an automatic analysis apparatus including a photomultiplier tube which controls a sensitivity of the photomultiplier tube without adjusting a high voltage value. [Solution] An automatic analysis apparatus according to the present invention includes a photomultiplier tube which detects light from a reaction vessel; a determination unit which determines an output signal of the photomultiplier tube in a case where the photomultiplier tube is irradiated with first light; and a control unit which irradiates the photomultiplier tube with second light to lower a sensitivity of the photomultiplier tube in accordance with a determination result by the determination unit.

A system is provided for producing an output photon having a predefined frequency. A pump module produces a plurality of pump fields at a plurality of pump frequencies. A photon pair source module generates frequency-correlated photon pairs. A detector module generates a heralding signal subsequent to detecting a first photon of a photon pair, the heralding signal indicative of a frequency of the second photon of the pair. A non-linear photonic element is arranged to (1) receive the heralded second photon and a complementary selected pump field, and (2) to produce an output photon having the predefined frequency. A pump field selector is configured to (1) receive a heralding signal and (2) select, based on the received heralding signal, a pump field of the plurality of pump fields for provision to the non-linear element. Methods, controllers and computer-readable media are also described herein.

A color ambient light sensor may gather ambient light measurements during operation of an electronic device. The color ambient light sensor may have a color ambient light detector and an adjustable neutral density filter. The electronic device may have components such as a camera and display that are adjusted using ambient light information from the color ambient light sensor. The display may have a display cover layer. Pixels in an active area of the display may display images through the display cover layer. An inactive area of the display may have an opaque masking layer on an interior surface of the display cover layer. An opening in the opaque masking layer may form an ambient light sensor window for the color ambient light sensor. The adjustable neutral density filter may be interposed between the color ambient light detector and the ambient light sensor window.

A laser beam profile measurement device includes: a plate-like or block-like fluorescence generation element including an incidence surface on which a laser light is incident and an emission surface from which the laser light is emitted; a light separation element for separating fluorescence from the laser light, the fluorescence generated in the fluorescence generation element and emitted from the emission surface; and an image element for receiving the fluorescence. The fluorescence generation element includes a first film formed on the incidence surface thereof. The first film has a wavelength-to-reflectance characteristic of transmitting a wavelength 1 of the laser light and reflecting a wavelength 2 of the fluorescence. The first film has a wavelength-to-reflectance characteristic of transmitting a wavelength 1 of the laser light and reflecting a wavelength 2 of the fluorescence. The light separation element may include a second film having a wavelength-to-reflectance characteristic of transmitting the wavelength 2 and reflecting the wavelength 1 or a third film having a wavelength-to-reflectance characteristic of reflecting the wavelength 2 and transmitting the wavelength 1. The first film may further have a wavelength-to-reflectance characteristic of reflecting a wavelength 0 between the wavelength 1 and the wavelength 2, while the second film may further have a wavelength-to-reflectance characteristic of reflecting the wavelength 0. Alternatively, the first film may further have the wavelength-to-reflectance characteristic of reflecting the wavelength 0 between the wavelength 1 and the wavelength 2, while the third film may further have a wavelength-to-reflectance characteristic of transmitting the wavelength 0.

In a first pixel part, as an incident position is closer to a first end of a first pixel pair group in a second direction, an intensity of a first electric signal decreases. In a second pixel part, as the incident position is closer to the first end, an intensity of a second electric signal increases. In a third pixel part, as the incident position is closer to a second end of a second pixel pair group in a first direction, an intensity of a third electric signal decreases. In a fourth pixel part, as the incident position is closer to the second end, an intensity of a fourth electric signal increases. A calculation unit performs weighting on a first position on the basis of the third and fourth electric signals, and performs weighting on a second position on the basis of the first and second electric signals.