18 results about "Photon flux density" patented technology

The present application relates to the field of plant cultivation, and discloses a method for promoting flowering and improving pollen activity of strawberries to solve the technical problem of how to improve the yield of strawberries.The method for promoting flowering of strawberries comprises the following steps: planting strawberries by using an LED light source as a light source, wherein the percentage of blue light photon flux density in the total photon flux density is 31%-74%, the percentage of green light photon flux density in the total photon flux density is 0%-42%, and the percentage of red light photon flux density in the total photon flux density is 26%-27%.The method for promoting flowering of strawberries can increase the number of present bud plants and the number of production bud plants.The present application also provides a method for improving the pollen activity of strawberries, which can significantly improve the pollen activity of strawberries.The method is beneficial to improving the yield of strawberries in artificial light plant factories, and thus improves the economic benefits.

The application discloses a kind of wide-band photoelectric telescope detection ability high-precision calculation modeling methods, belong to photoelectric measurement technical field.The method is by the spectral integration of target photon flux density, system response and noise source in the whole detection waveband, accurately calculate signal electron number, background electron number and total noise, and then solve system signal-to-noise ratio (SNR).Specifically include: based on target apparent magnitude and blackbody radiation model calculation photon flux density;Integral calculation signal electron number and background electron number;Comprehensively consider photon noise, dark current noise and readout noise, integral solution total noise;Finally, based on the integral result, calculate signal-to-noise ratio.The application overcomes the deficiency of traditional average wavelength approximation method, significantly improves the signal-to-noise ratio calculation precision, and is suitable for the design and performance evaluation of different photoelectric systems.

The application relates to the technical field of green plant growth control, in particular to a method and system for controlling green plant growth by using an LED plant growth lamp, the method comprising the following steps: acquiring first data; monitoring the light intensity and photosynthetic photon flux density in a first period, calculating the first period average photosynthetic photon flux density and the first period light duration, recording the initial electric quantity and the control starting moment; constructing a first optimization objective function and optimization constraint conditions; calculating the optimal LED plant growth lamp power by using a particle swarm optimization algorithm; and setting the LED plant growth lamp power as the optimal LED plant growth lamp power from the control starting moment until the first period ends. The application optimizes the control of the LED plant growth lamp power, so that the load rate of the energy storage battery reaches a better level under the premise of ensuring that the green plants obtain suitable photosynthetic photon accumulation, and the service life of the energy storage battery is improved.

The invention relates to a method for calculating the detection distance of a target single photon in a turbid medium, which relates to the field of detection and comprises the following steps of: placing a light source at a coordinate position of an original point, and unidirectionally emitting a light pulse to the turbid medium; the single-photon detector receives returned photons and divides the received photons into three parts, namely photons returned by the turbid medium, photons returned by the target object hidden in the turbid medium and noise photons; respectively calculating photon flux density Green functions of the three parts; the ratio of the photon count returned by the hidden object at the target peak moment to the background photon count is used, when the ratio is larger than 1, the hidden target object can be effectively detected, and when the ratio is larger than 3, the hidden target object can be effectively imaged; the method for calculating the detection limit of the single-photon detector in the turbid medium has the advantage that the detection limit of the single-photon detector in the turbid medium can be accurately calculated.

A culture device 1a is provided with a container 10 and a light source 20. The container (10) is capable of accommodating a culture solution (LC) containing a prokaryotic photosynthetic organism. The light source 20 is disposed inside the container 10. Conditions (A * B) / (C * D) > = 10 * 103 [[mu] mol * m <-3 > * s <-1 >] and B / D > = 1.3 * 10 <-1 > [m <-1 >] are satisfied in the culture device 1a. A is the photon flux density [[mu] mol * m <-2 > * s <-1 >] of the light source (20). B is the surface area [m2] of the light source 20. And C is the optical density [-] of the culture solution LC contained in the container 10. D is the volume [m3] of the culture solution LC contained in the container 10.

This invention relates to the field of lighting technology and provides a plant lamp. The plant lamp includes a lamp body assembly, a second lamp body, and a first support. The lamp body assembly is evenly spaced between two first supports. The second lamp body is arranged along the length of the first supports and is located on the same side of the first supports as the lamp body assembly. The second lamp body includes a second lens, and the thickness of the second lens facing the lamp body assembly is greater than the thickness of the lens facing away from the lamp body assembly. This technical solution evenly spaces the lamp body assembly between the two first supports without affecting its expandability. Through the polarizing structure of the second lens, the emitted light is deflected towards the area between the lamp body assemblies, supplementing the photosynthetic photon flux density at the longitudinal edge of the plant lamp. This reduces the difference in photosynthetic photon flux density between the edge of the central area of ​​the plant lamp and the center of the lamp, effectively solving the technical problem of poor uniformity of photosynthetic photon flux density within the coverage area of ​​multiple plant lamps connected in series.

To provide a photon flux density prediction system for predicting photon flux density from sunlight.SOLUTION: A photon flux density prediction system includes: a storage unit that associates and stores date and time information, location information, and sunlight intensity information; a communication unit for communication; a first calculation unit that calculates sunlight intensity information associated with sunlight inquiry information included in prediction information inquiry information input via the communication unit; a second calculation unit that calculates direction-specific sunlight intensity information using the calculation result of the first calculation unit; and a third calculation unit that calculates photon flux density prediction information for predicting the photon flux density corresponding to the prediction information inquiry information input via the communication unit, using the calculation result of the second calculation unit. The communication unit transmits the photon flux density prediction information calculated by the third calculation unit to a transmission source of the prediction information inquiry information.SELECTED DRAWING: Figure 1

A culture device includes a container and a light source. The container accommodates a culture liquid containing prokaryotic photosynthetic organisms. The light source is disposed inside the container. In the culture device, conditions (A×B) / (C×D)≥10×103 [μmol·m−3·s−1] and B / D≥1.3×10−1 [m−1] are satisfied. A is a photon flux density [μmol·m−2·s−1] of the light source. B is a surface area [m2] of the light source. C is an optical density [-] of the culture liquid accommodated in the container. D is a volume [m3] of the culture liquid accommodated in the container.

The invention discloses a method for relieving salt stress through light control, a combined film and a combined film device. The method comprises the following steps: adjusting the photon flux density ratio of a red light area to a blue light area in the composition of top irradiation light quality of tomato plants to 3.5-4.0, and then culturing. The light quality composition in the light regulation and control method is convenient to implement, the effect is good, and the limitation of salt stress on the growth of tomato seedlings can be effectively relieved. Meanwhile, according to the combined film and the combined film device for implementing the light regulation and control method, light quality composition meeting the requirements of the light regulation and control method can be obtained without depending on expensive LED equipment, extra energy consumption is not generated, large-scale popularization is facilitated, and theoretical and technical bases can be laid for sustainable and large-scale development of facility agriculture.

The plant growth suppression method according to the present disclosure includes a step of, within a single day, irradiating a plant with suppression light including left circularly polarized light during a second time period that is different from a first time period during which the plant is irradiated with growth light. The photon flux density of the suppression light is a value below the light compensation point of the plant.

The utility model provides a photon flux density detection device, which belongs to the technical field of photon flux detection and comprises a mounting seat, a plurality of fixing parts, a plurality of detection components and an optical glass cover plate. The plurality of fixing pieces are respectively arranged in the accommodating cavities, and fixing grooves are formed in the fixing pieces; the multiple groups of detection assemblies are arranged in one-to-one correspondence with the fixing pieces, the detection assemblies are arranged in the fixing grooves and used for detecting the photon flux density, and the multiple groups of detection assemblies are used for detecting the photon flux density of different wave bands respectively; and the optical glass cover plate covers the top of the mounting seat and is used for sealing the opening of the accommodating cavity. The utility model provides a photon flux density detection device and aims to solve the problem that the photon flux density of a plurality of wave bands cannot be measured at the same time.

The invention relates to the technical field of lamps, and provides a plant lamp which comprises lamp body assemblies, second lamp bodies and first supports, and the lamp body assemblies are evenly arranged between the two first supports at intervals; the second lamp body is arranged in the length direction of the first support, and the second lamp body and the lamp body assembly are located on the same side of the first support. The second lamp body comprises a second lens, and the thickness of the side, facing the lamp body assembly, of the second lens is larger than the thickness of the side, back to the lamp body assembly, of the second lens. According to the technical scheme, the lamp body assemblies are evenly arranged between the two first supports at intervals, and the expansibility of the lamp body assemblies is not affected; through the polarization structure of the second lens, light is made to deviate to the area between the lamp body assemblies, the photosynthetic photon flux density of the longitudinal edge of the plant lamp is supplemented, and the difference between the photosynthetic photon flux density of the edge of the middle area of the plant lamp and the photosynthetic photon flux density of the center of the lamp is reduced; the technical problem that the photosynthetic photon flux density uniformity in the coverage area of multiple plant lamps connected in series is poor is effectively solved.

To provide a laser system that suppresses formation of a multiple annular profile in amplified light by an OPA.SOLUTION: The laser system includes: a pump laser apparatus for outputting pump light having a first wavelength; a signal laser apparatus for outputting signal light having a second wavelength longer than the first wavelength; an optical parametric crystal for transmitting the pump light and the signal light and outputting amplified light having the second wavelength; and a photon flux density control mechanism for controlling photon flux densities of the pump light and the signal light such that the sum of the photon flux densities at an input end of the optical parametric crystal of the pump light and the signal light becomes an intensity distribution in which the intensity distribution of the amplified light having the second wavelength monotonically decreases from a center toward an outer side.SELECTED DRAWING: Figure 5

The invention discloses a high-precision calculation modeling method for the detectability of a broadband photoelectric telescope, and belongs to the technical field of photoelectric measurement. According to the method, spectral integration is carried out on target photon flow density, system response and a noise source in the whole detection wave band, the number of signal electrons, the number of background electrons and total noise are accurately calculated, and then the signal-to-noise ratio (SNR) of the system is solved. The method specifically comprises the following steps: calculating photon flow density based on target apparent magnitude and a blackbody radiation model; carrying out integral calculation on signal electron number and background electron number; the photon noise, the dark current noise and the readout noise are comprehensively considered, and the total noise is solved through integration; and finally calculating the signal-to-noise ratio based on an integral result. The method overcomes the defects of a traditional average wavelength approximation method, remarkably improves the calculation precision of the signal-to-noise ratio, and is suitable for design and performance evaluation of different photoelectric systems.

The application relates to the fields of infrared optical film technology and precise photoelectric testing technology, and provides an attenuating piece, a preparation method, an attenuating piece wheel assembly, a testing system and a testing method. The application utilizes a first attenuating piece group and a second attenuating piece group to form an attenuating piece, each first attenuating piece in the first attenuating piece group adopts a zinc selenide base material and a nickel film and has high spectral transmittance; each second attenuating piece in the second attenuating piece group adopts a silicon base material, a gold film and a chromium adhesion layer and has high spectral transmittance; the attenuating piece is applied to an infrared detector nonlinearity testing system, different first attenuating pieces and second attenuating pieces can be combined to construct an attenuating assembly with a large dynamic range. The testing system using the attenuating piece can realize automatic scanning of incident photon flux density across more than four orders of magnitude, solves the problems of preparation and system integration of a mid-wave large dynamic range attenuating device, and improves the efficiency and reliability of infrared detector response nonlinearity testing.

The application discloses an LED light formula for treating skin aging, a light source and application thereof, relates to the technical field of phototherapy and photohealth, and belongs to the technical field of phototherapy and photohealth. ‑2 ·s ‑1 The total photon flux density of the LED light formula is 240-300 mu mol m 2 The total irradiance of the LED light formula is 70-80 W / m 2 ; wherein, according to the percentage of the total photon flux density, the yellow light is 30-40%, and the red light is 60-70%; according to the percentage of the total irradiance, the yellow light is 20-30%, the red light is 35-45%, and the infrared light is 35-40%. The LED light formula can effectively reduce skin wrinkles, improve skin texture, skin color and pigmentation, prevent trans-epidermal water loss, and improve the water content of the stratum corneum, so as to achieve the effect of improving skin aging.

A laser system is provided with: a pump laser device that outputs pump light of a first wavelength; a signal laser device that outputs signal light of a second wavelength longer than the first wavelength; an optical parametric crystal that transmits the pump light and the signal light and outputs amplified light of a second wavelength; and the photon flux density control mechanism is used for controlling the photon flux density of the pump light and the signal light, so that the sum of the photon flux density of the pump light and the photon flux density of the signal light at the input end of the optical parametric crystal becomes the intensity distribution of the amplified light of the second wavelength which is monotonically reduced from the center to the outside.

Photon analyzer device, installation for the development of a living organism comprising such a device and method for controlling such an installation. The invention relates to a photon analyzer device (17), comprising a spectroradiometer (21) for capturing light radiation and measuring a surface power density as a function of an emission wavelength between 350nm and 800nm, said radiation being emitted by a lighting system.According to the invention, the device comprises a housing (19) containing said spectroradiometer and an electronic board on which said spectroradiometer is integrated and comprising a computing unit (27) programmed to: - acquire, in real time, a measurement of surface power density from said spectroradiometer as a function of at least one emission wavelength, - convert, in real time, said measurement of surface power density into at least one value of the received photon flux density as a function of said emission wavelength. Figure 2.