Studies On Spectral Scene Reproduction Systems Based On Multispectral LED Fitting

The simulated spectral source has important application value in many fields such as life science field(Auxiliary medical pathology diagnosis),daily life(landscape decoration),aerospace(remote sensing for accurate calibration),and commercial manufacture(panel light source)and in agricultural and education scientific research field.With the rapid development of the application of LED technology,the devices of LED have the merits of long serving life,high lighting efficiency,rapid responding time,and high wide selection of light band.Consequently,taking the demands of designing for the target spectral scene reproduction systems into consideration,we use LED with vary light bands as the light source,and perform gauss curve calculation to fit spectra in scene via MATLAB software,and therefore serving as the criteria to selection of multispectral LED.Meanwhile,light source driving system applies high performance embedded MCU as the main data processor.The chip for LED is a specific driver chip made in TI Corporation.Through analysis for the collected data about the target spectra in scene,the processor then transfers calculated results to the driver modules of LED which based on the results to realize the reproduction of the spectra of target scene.Data communication adopts the combination of the USB and the Bluetooth communication,which can make the design meet the requirements of various communication environments.The light mixing parts adopts the light guide plate of the PMMA material,and the bottom of the parts is provided with a micro dot,and the side of the parts is provided with V-cut,that it can enhance the light intensity of the incident light on the side surface and the light output efficiency of the upper surface,thereby the uniform and high precision target scene spectrum can be synthesized.Moreover,this design method can also combine with spectrometer directly to realize the real-time capability of reproduction of spectral scene,thereby holding great potential application in the future.