11 results about "Fluence" patented technology

The invention provides a light generating system (1000) comprising (a) first light generating device (110) and (b) a control system (300), wherein: the first light generating device (110) is configured to generate first device light (111), wherein the first device light (111) comprises light having one or more wavelengths in a first wavelength range of 280-320 nm, wherein the first wavelength range comprises a lower subrange from λ11 to λ12 and a higher subrange from λ21 to λ22, wherein 280 nm≤λ11<λ12≤λ21<λ22≤320 nm, and wherein λ12 and λ21 are selected from the wavelength range of 290-315 nm, wherein a wavelength dependent radiant flux of the first device light (111) is controllable: the light generating system (1000) is configured to generate system light (1001) comprising at least part of the first device light (111); the control system (300) is configured to control the wavelength dependent radiant flux of the first device light (111) as a function of time, wherein the light gen-crating system (1000) is configured to provide the first device light (111) at a first time t1, at a second time t2, and at a third time t3; wherein the second time t2 is temporally arranged after the first time t1, and the third time t3 is temporally arranged after the second time t2; and wherein the first time t1, the second time t2, and the third time t3 are temporally arranged in a single day; wherein relative to a total radiant flux in the first wavelength range the radiant flux of the first device light (111) in the lower subrange is relatively lower at the first time t1 than at the second time t2, and wherein relative to the total radiant flux in the first wavelength range the radiant flux of the first device light (111) in the higher subrange is relatively higher at the first time t1 than at the second time t2; and / or wherein relative to the total radiant flux in the first wavelength range the radiant flux of the first device light (111) in the lower subrange is relatively higher at the second time t2 than at the third time t3, and wherein relative to the total radiant flux in the first wavelength range the radiant flux of the first device light (111) in the higher subrange is relatively lower at the second time t2 than at the third time t3.

Examples relate to methods and systems for evaluating near-infrared (NIR) performance of endoscopes. A method includes illuminating an endoscope's entrance pupil with a first radiant flux diffused through a first integrating sphere, the first radiant flux having a first spectrum, measuring a second radiant flux collected by a second integrating sphere at the exit pupil having a second spectrum, and determining transmission by comparing the spectra. The method includes determining a normalization factor for the second spectrum by finding the maximum value of a ratio of output scaled spectrum and input normalized spectrum. The method includes determining transmission through the endoscope as the ratio of the output normalized spectrum sum in an NIR region to the input normalized spectrum sum in the same NIR region.

This wet-area device is characterized by comprising an irradiation device that radiates light, and a sterilization unit that is sterilized by light radiated from the irradiation device. The sterilization unit has a direct irradiation unit that is irradiated with direct light radiated from the irradiation device, and an indirect irradiation unit that is irradiated with reflected light radiated from the irradiation device and reflected by the direct irradiation unit. The direct light has a peak wavelength of 350-450 nm in at least a spectrum. The ratio of the short-wavelength radiant flux to the total radiant flux of the reflected light is smaller than the ratio of the short-wavelength radiant flux to the total radiant flux of the direct light.

This application discloses a method, apparatus, equipment, medium, and product for blackbody temperature control and calibration, relating to the interdisciplinary technical fields of precision thermal control and radiometry. The method includes: constructing a generalized end-to-end optical-thermal energy transfer model; based on the generalized end-to-end optical-thermal energy transfer model, performing inversion based on the required entrance pupil radiant flux or equivalent image grayscale value, and obtaining the corrected blackbody setpoint temperature through numerical iterative calculation; and using a piecewise active disturbance rejection control system and a temperature-adaptive thermodynamic piecewise control strategy, tracking and controlling the corrected blackbody setpoint temperature. This application can achieve accurate inversion of blackbody temperature and rapid, accurate, overshoot-free closed-loop control of blackbody temperature.

A light emitting device includes: a light emitting element that emits ultraviolet light having an emission peak wavelength of from 220 nm to 320 nm, and that has a radiant flux of higher than 20 mW; a first member; a second member; and a silicone resin layer that bonds the first member and the second member together, transmitting the ultraviolet light in this order. A first interface between the silicone resin layer and the first member has a shortest distance (A), from the center of the first interface to the peripheral edge of the first interface, of 1.00 mm or less. The thickness (B) of the silicone resin layer is 0.6 μm or more. The ratio (A / B) is 900 or less when the units are unified.

An X-ray irradiation apparatus (100) comprises an X-ray source device (110) for creating X-rays (2) with a polychromatic spectrum and an X-ray optic device (120) with a beam axis (3) that is longitudinal, wherein the X-ray optic device (120) comprises a reflector device (121) that is polycrystalline having a reflector geometry, a reflector mosaicity and a reflector thickness and the reflector device (121) is arranged for receiving a portion of the X-rays (2) within an acceptance angle of the reflector device (121) and for creating an X-ray beam (4) by Bragg reflection, which is directed along the beam axis (3) towards a focal position thereof and has a spectral distribution determined by the polychromatic spectrum of the X-rays (2), the reflector geometry, the reflector mosaicity and the reflector thickness, and wherein the X-ray irradiation apparatus (100) further comprises a spectral filter aperture device (122) that is arranged downstream from the reflector device (121) for creating a filter gap (123) transmitting a first spectral portion (4A) of the spectral distribution of the X-ray beam (4) and blocking a second spectral portion (4B) and a third spectral portion (4C) of this spectral distribution, wherein the first spectral portion (4A) has higher energies than the second spectral portion (4B) and lower energies than the third spectral portion (4C), wherein the reflector device (121) has an acceptance solid-angle of at least 100 micro-steradian, and wherein the reflector geometry, the reflector mosaicity, the reflector thickness and the acceptance angle of the reflector device (121) are selected such that simultaneously a radiation flux in the first spectral portion (4A) is at least 1% of an incoming flux of the same spectral portion of the X-rays (2) received by the reflector device (121) with a peak reflectivity of at least 1%, the first spectral portion (4A) has a spectral bandwidth of at most 15%, the second and third spectral portions (4B, 4C) have a flux reduced by at least three orders of magnitude compared with the flux in the first spectral portion (4A), and the X-ray beam (4) has a focal spot size of less than 1.5 mm in both transverse dimensions relative to the longitudinal beam axis. Furthermore, an X-ray fluorescence imaging apparatus (200) and a method of using the X-ray irradiation apparatus (100) are described.

A system for preventing asynchronous rotation in aircraft components includes an optical emitting source, an optical receiver, and a retroreflector configured to be disposed on a rotating component connected to an engine of an aircraft. The system emits radiant flux from the optical emitting source towards the retroreflector when the retroreflector is on the rotating component and the engine positions the rotating component into a field of view of the optical emitting source; receives incident radiant flux from the retroreflector by the optical receiver when the retroreflector is within the field of view of the optical emitting source; records a time of receiving the incident radiant flux; determines a rotational speed of the rotating component based on the recorded time; determines whether the rotational speed is within a predetermined range; and selectively changes a state of the engine when the rotational speed is outside of the predetermined range.

The invention provides a light generating system (1000) comprising (i) a light generating device (100) configured to generate device light (101) having a controllable radiant flux and a controllable spectral power distribution, and (ii) a control system (300) configured to control the radiant flux and the spectral power distribution of the device light (101); wherein: (A) a ratio B / Y of the device light (101) is defined as a ratio of a radiant flux of the device light (101) in the 450-500 nm wavelength range and of a radiant flux of the device light (101) in the 550-600 nm wavelength range; (B) in a first operational mode of the light generating system (1000) the control system (300) is configured to change from a first device light setting to a second device light setting, different from the first device light setting; (C) the first device light setting and the second device light setting are selected from: (a) a high radiant flux first setting (S1) wherein the device light (101) is first light with a first radiant flux I1 and a first B / Y ratio R1; and (b) a low radiant flux second setting (S2) wherein the device light (101) is second light with a second radiant flux I2 and a second B / Y ratio R2; and (D) I2<I1, and R1<R2.

The invention relates to the technical field of hydrogen energy safety monitoring, and discloses a hydrogen flame combustion state monitoring device and method based on infrared pyroelectric sensing, and the device comprises a metal housing, a sapphire glass window, a narrow-band optical filter, an infrared pyroelectric sensor, a signal conditioning circuit board and a microprocessor. The characteristic radiation of hydrogen combustion product water vapor in a specific infrared band is utilized, optical frequency selection is realized through a narrow-band optical filter, a flame flicker signal is extracted by utilizing the characteristic that the pyroelectric sensor is sensitive to the change rate of radiation flux, and the microprocessor calculates the signal energy characteristic in real time, so that the flame flicker signal is obtained. The flame state is judged by combining threshold comparison and time confirmation logic, and then alarm and safety interlocking control are driven. The method effectively solves the problems that the hydrogen flame is difficult to identify and the traditional method is poor in anti-interference capability, and has the advantages of high monitoring specificity, high sensitivity, good reliability, low cost and the like.

The application discloses a calibration method and device of a wide-band irradiance meter with high irradiance. The method comprises the following steps: calibrating a spectral radiometric device to obtain a spectral correction coefficient; measuring spectral radiant flux of a fiber type wide-band light source and correcting the spectral radiant flux by using the spectral correction coefficient to obtain corrected spectral radiant flux; calculating radiant flux of a predetermined wave band according to the corrected spectral radiant flux; calculating a radiant illuminance value of a fiber output port as a standard value according to the radiant flux of the predetermined wave band; measuring a reading of a measured irradiance meter at the same fiber output port, comparing the reading with the standard value, and obtaining a calibration result. The application solves the problem that the existing light track method cannot be adapted to the fiber type irradiance meter by combining an integrating sphere with a standard fiber and introducing a fiber output light source into the integrating sphere to homogenize light. The radiant illuminance is accurately calculated by using a standard lamp calibration and a fiber end surface area, near distance measurement error is avoided, and accurate calibration of high irradiance is realized.

The invention discloses a calibration method and device for a high-irradiance broadband irradiatometer. The method comprises the following steps: calibrating a spectral radiation measurement device to obtain a spectral correction coefficient; measuring the spectral radiation flux of the optical fiber type broadband light source, and correcting the spectral radiation flux by using the spectral correction coefficient to obtain the corrected spectral radiation flux; calculating the radiation flux of the predetermined wave band according to the corrected spectral radiation flux; according to the radiation flux of the preset wave band, calculating a radiation illumination value of the optical fiber output port as a standard value; and measuring the reading of the measured irradiatometer at the same optical fiber output port, and comparing the reading with the standard value to obtain a calibration result. Through combination of the integrating sphere and the standard optical fiber, an optical fiber output light source is introduced into the integrating sphere for dodging, and the problem that an existing optical track method cannot adapt to an optical fiber type irradiatometer is solved; the irradiance is accurately calculated through calibration of the standard lamp and the area of the end face of the optical fiber, close-range measurement errors are avoided, and accurate calibration of the high irradiance is achieved.