Design of Color Recovery Filters for Visible Short-Wave Infrared Imaging Systems
Aiming at the problem of color information loss in the visible light bands and grayscale imaging in the current 0.40～2.50 μm wide spectral response imaging system,filters are designed and fabricated for all-weather,visible light color recovery,and short-wave infrared(SWIR)false color imaging.Using Essential Macleod film design software,three schemes are designed for parameter and performance comparison,and ultimately,a two-stage cutoff band based on the short-wave pass film system is used to complete the design of blue(B)+SWIR,green(G)+SWIR,and red(R)+SWIR negative filter film systems.A long-wave pass film system is used to achieve a 0.42～2.50 μm passband film design.The combination of the four filters is prepared on a quartz glass JGS-1 substrate using Ta2O5 and SiO2 as high and low refractive index materials.The average transmission of the passband is measured to be greater than 93.6％,and the difference in average transmission of the passband is less than 1.6％.Finally,the prepared filter is used for photography and calculation to verify the development scheme of this article.The measurement results have reference value for further research on wide spectral color imaging technology.
万方数据
维普
