Generally speaking, emission spectrum is the spectrum directly produced by an object emitting light. Emission spectrum includes continuous spectrum and linear spectrum. Continuous spectrum is the spectrum emitted by hot solids, liquids, and high-pressure gases, while linear spectrum is the spectrum emitted by rarefied gases. When white light emitted by a high-temperature object passes through a low-temperature substance, the spectrum obtained after certain wavelengths of light are absorbed by that substance is called absorption spectrum.
The solar spectrum is a typical absorption spectrum. Both linear and absorption spectra can be used for spectroscopic analysis. Spectroscopic analysis can identify substances and determine their chemical composition, making it an important tool in chemical detection. Spectral irradiance is the irradiance per unit frequency or wavelength of a surface; wavelength irradiance is measured in watts per square meter per nanometer.
A spectroradiometer is a device used to measure the spectral power distribution of a light source. Through internal photoelectric sensor elements and based on the spectral power distribution, it can determine the radiance, luminosity, and chromaticity of light, thereby measuring, characterizing, and calibrating light sources for various applications. Spectroradiometer systems can operate without being connected to a personal computer. This makes them highly portable while maintaining the accuracy of a spectrometer.
ICbuy.com distributes the Japanese EKO MS-711 photoelectric sensor, which features temperature control and provides accurate irradiance measurement data in the spectrum from 300 nm to 1100 nm (UV/Visible/NIR). It also extends the operating temperature range from -10 to 50°C and is not easily affected by mechanical vibration or handling.
Using satellites orbiting at high altitudes, the visible-shortwave-infrared hyperspectral camera of the spectroradiometer can observe any region on Earth, and can repeat observations of the same region once a week. It offers broad data coverage, strong verification capabilities, and large-scale quantitative applications.
It can also be used to monitor plant cells and water content, suspended solids in water, snow particle size, surface mineral composition, rock type, and oil and gas leaks. This greatly improves the ability to detect ecological resources in the land environment and provides a high-quality data source for establishing a map database with typical characteristics.
