Changguangchen Spectrum Coating Technology Enables Remote Sensing Imaging

In response to the restriction of image sensor manufacturers on the sale of aerospace-grade multispectral chips to China, we have successfully developed 4-spectrum, 5-spectrum, 9-spectrum, 32-spectrum and other multispectral filters. At present, the developed aerospace grade multi-spectral filters have been successfully applied to many national major satellites and Jilin 1 satellite, obtaining very good image and spectral data.

Multispectral Filter Satellite Project Support -

Multi-spectral filters are precision produced by photolithography + coating composite process, using high-precision replica photolithography to produce deposition masks, and high-performance filter films for each spectral band in the deposition pattern system. Multi-spectral filters have high transmittance, excellent filtering characteristics, multiple filtering channels integrated into a single substrate, spatial position alignment accuracy is extremely high. The channel width and channel gap can be 100 microns, the spectral passband transmittance is higher than 95%, the out-of-band cutoff is lower than 0.1%, the spectral channel alignment accuracy is better than 2 microns, the reflectance of the isolation area between multi-spectral channels is lower than 3%, and the transmittance is lower than 0.1%.

Linear Graduated Filter Satellite Project Support -

Linear gradient filters utilize a continuous coating method based on a multilayer wedge film structure to achieve spatially continuous filtering characteristics. The film slope can be adjusted according to the dispersion requirement to obtain the target linear rate of change. Linear gradient filters have highly integrated spectral capability, which is an irreplaceable advantage in the miniaturization and lightweight design of spectral instruments.