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According to spectral band, optical filters can be classified into several categories.

Filters are classified according to the length of the spectrum (i.e., the spectral region in which they operate) as follows: ultraviolet filters, visible-light filters, near-infrared filters, mid-infrared filters, and far-infrared filters.

Spectral wavelength range:

UV filter 1–380 nm

Visible light filter, 380–780 nm

Near-infrared filter, 780–1500 nm

Infrared filter, 1500 nm – over 10 μm

Champion Optics is a high-tech enterprise integrating the research and development of optical thin films, the development of new spectral instruments, and spectral image processing and application.

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