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Synthesized isoenergetic white light standard light source adopting halogen tungsten lamp and multi-primary-color LED light source

A technology of LED light source and standard light source, which is applied to optical elements, light sources, electric light sources, etc., which are used to change the spectral characteristics of emitted light, can solve the problems of poor stability, insufficient signal-to-noise ratio, and fast light attenuation, and can solve the problem of blue light. Effects of low band signal-to-noise ratio problems

Pending Publication Date: 2020-10-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the standard lamp in the ultraviolet band is a deuterium lamp, but the light decays rapidly in the 220-230nm band, and the stability is poor
Visible light and near-infrared bands use halogen tungsten lamps, but the signal in the blue-violet light band is low, and the signal-to-noise ratio is not enough, which affects the measurement accuracy

Method used

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  • Synthesized isoenergetic white light standard light source adopting halogen tungsten lamp and multi-primary-color LED light source
  • Synthesized isoenergetic white light standard light source adopting halogen tungsten lamp and multi-primary-color LED light source
  • Synthesized isoenergetic white light standard light source adopting halogen tungsten lamp and multi-primary-color LED light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The multi-primary LED light source synthesized by 35 primary colors is mixed with the halogen tungsten lamp 3 to obtain a synthetic equal-energy white light with a wavelength range of 220-1000nm, which is suitable for irradiance or radiant flux calibration of ultraviolet, visible and near-infrared LED light sources.

[0021] The 35 primary color spectra of the synthesized equal-energy white light source and the center wavelength of the tungsten-halogen lamp 3 spectrum cover 210-850nm, and the peak wavelength, half width and synthesis ratio are shown in Table 1. The synthetic spectrum is as figure 1 As shown, it has a least-squares deviation of 0.12 from the theoretically calculated isoenergetic white light spectrum in the range of 220-1000 nm.

[0022] The structure of the high-energy white light standard light source is as follows: figure 2 As shown, it includes an integrating sphere 1 , a multi-primary LED light source 2 and its radiator, a tungsten halogen lamp 3 ,...

Embodiment 2

[0031] Same as Example 1, adopt 35 primary color LED spectra, mix with halogen tungsten lamp 3, obtain the synthetic equal energy white light of wavelength range 220-1000nm, it and the least squares of theoretically calculated equal energy white light spectrum in the range of 220-1000nm The deviation is 0.12.

[0032] Compared with Embodiment 1, the structure is changed from one LED light source mixed with 35 primary color LED chips and fluorescent powder to 35 single primary color light sources, which are respectively installed in the wall of the integrating sphere, and tungsten halogen lamps are mixed at the same time to achieve equal energy. The structure of the white light standard light source is as follows: image 3 As shown, it includes an integrating sphere 1, 35 kinds of multi-color LED light sources 2, a tungsten halogen lamp 3, a baffle 4, and a lens 5 at the light outlet.

[0033] The 35 kinds of LED light sources are all directional monochromatic light sources, a...

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Abstract

The invention belongs to the technical field of semiconductor lighting, and particularly relates to a synthesized isoenergetic white light standard light source adopting a halogen tungsten lamp and amulti-primary-color LED light source. The synthesized isoenergetic white light standard light source comprises an integrating sphere, the multi-primary-color LED light source, the halogen tungsten lamp, a baffle and a light outlet lens, the multi-primary-color LED light source and the halogen tungsten lamp serve as light sources and are installed on the sphere wall of the integrating sphere, and light emitted by the light source is mixed through the integrating sphere and then emitted through the light outlet lens. The baffle is arranged in front of the light outlet. The multi-primary-color LED light source is composed of LED chips with various primary color spectrums and fluorescent powder. The relative spectral radiation intensities of the standard light source spectrum in the target effective waveband range are the same, and the influence caused by the difference of the signal-to-noise ratios of different wavelengths of the light source in the metering test can be avoided.

Description

technical field [0001] The invention belongs to the technical field of semiconductor lighting, and in particular relates to a synthetic equal energy white light standard light source which adopts a halogen tungsten lamp and a multi-primary color LED light source. Background technique [0002] The diversity of LED spectrum makes it widely used in various fields. LEDs in the ultraviolet band are used for disinfection and sterilization, full-spectrum LEDs are used for plant lighting, and LEDs in the near-infrared band are used for hair removal and beauty. [0003] In order to use the LED light source reasonably, it is very important to accurately measure the light output of the LED. If the irradiance of ultraviolet light is not enough, the disinfection will not be complete, and if it is too strong, it will easily cause harm to people; if the light of plant lighting cannot be achieved in an appropriate amount, it will affect the growth of plants; Too strong can cause thermal d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S10/02F21V5/04F21V19/00F21V9/30F21V9/40F21Y115/10
CPCF21S10/023F21V5/04F21V19/001F21Y2115/10F21V9/30F21V9/40
Inventor 韩秋漪杨丹李福生张善端
Owner FUDAN UNIV
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