Skylight spectrum stimulating method based on artificial light source

A technology of artificial light source and simulation method, applied in the field of optical remote sensing simulation, can solve the problem of not considering the spectral characteristics of sky light, and achieve the effect of safe and easy operation, saving volume and cost, and breaking functional barriers.

Active Publication Date: 2013-03-27
BEIHANG UNIV
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Problems solved by technology

Regarding the research on the spectrum of sky light, non-imaging spectrometers are mainly used in China to measure the spectrum of sky light outdoors, analyze the abnormalities of certain spectral features, and then serve in the fields of air pollution monitoring and other fields. The laboratory proposed the idea of ​​an artificial sky, but there is no report on the realization of physical simulation; abroad, only the US company Itek has established a sky light simulation facility in the visible range for early multispectral imaging simulation research, but this facility does not consider Spectral Properties of Sky Light

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  • Skylight spectrum stimulating method based on artificial light source
  • Skylight spectrum stimulating method based on artificial light source
  • Skylight spectrum stimulating method based on artificial light source

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Embodiment Construction

[0028] In order to better illustrate the sky light spectrum simulation method based on artificial light sources involved in the present invention, the light source is modeled and simulated using Light tools optical design software, and the CDM-R reflective ceramic metal halide produced by Philips is selected for the simulated light source parameter setting. Objects to simulate the spectral characteristics of sky light in the range of 400nm-2500nm.

[0029] A method for simulating sky light spectrum based on artificial light sources of the present invention, see figure 1 As shown, the specific implementation steps are as follows:

[0030] (1) Use the MODTRAN radiative transfer model to calculate the lighting characteristics of sky light: the parameters of MODTRAN calculation sky light are set to mid-latitude summer (45° north latitude, July) / rural aerosol model VLS=23km / sun altitude angle 70° / day The vertex angle is 45° / the relative azimuth angle is 45°, using the atmospheric ...

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Abstract

The invention provides a skylight spectrum stimulating method based on artificial light source. The skylight spectrum stimulating method includes the following steps: (1) calculating spectrum characteristics of skylight by utilizing a moderate spectral resolution atmospheric transmittance code (MODTRAN) radiation transmission model; (2) choosing a metal halide light source as a main stimulating light source of the skylight spectrum within the range of 400nm-2500nm; (3) analyzing similarities and differences of the metal halide light source spectrum and skylight spectrum; (4) using a large-power solid lighting element light-emitting diode (LED) as the spectrum compensation light source within the range of 400nm-600nm; and (5) choosing corresponding optical filters to revise the metal halide light source spectrum within the range of 600nm-2500nm. Compared with the like systems, the skylight spectrum stimulating method can achieve full-spectrum skylight stimulation within the range of 400nm-2500m with low cost and is suitable for research of skylight lighting environment in an optical remote sensing physical or semi-physical simulation system.

Description

(1) Technical field [0001] The invention relates to a method for simulating sky light spectrum based on an artificial light source, belongs to the technical field of optical remote sensing simulation, and is suitable for the simulation research of sky light lighting environment in optical remote sensing physical or semi-physical simulation systems. (2) Background technology [0002] Remote sensing simulation technology refers to the simulation of all aspects of the remote sensing process through digital or physical methods. The existing remote sensing simulation technologies mainly include digital simulation, physical simulation and semi-physical simulation. Digital simulation is to model and simulate the remote sensors and atmospheric transmission involved in the remote sensing process through mathematical methods; The model physically realizes the remote sensor, remote sensing platform, lighting environment and observation target; the semi-physical simulation technology co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/10G01N21/25
Inventor 贾国瑞张超赵慧洁
Owner BEIHANG UNIV
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