Optical Filters
Multispectral Filters are optical filters designed to transmit or block light in specific wavelength ranges across several spectral bands. Unlike traditional filters that operate within a single spectral range, multispectral filters are capable of filtering light across a broader range of wavelengths, allowing simultaneous separation of light into multiple discrete spectral channels. Multispectral filters are commonly used in various applications such as remote sensing, satellites, environmental monitoring, agriculture, medical imaging, and defense. By selectively filtering light in different spectral bands, multispectral filters enable the capture of valuable information about objects or scenes that might not be visible to the human eye alone. Moreover, a single multiple-spectral filter can replace several single-spectral filters, allowing a more compact and simple construction of the system.
Hangzhou Shalom EO offers Standard and Custom Multispectral Filters, two categories are available, including Photolithographic Multispectral Filters, and Spliced Multispectral Filters. Available standard channel numbers include 4, 5, and 8 channels, while other custom channel numbers can be tailored upon request. The photolithographic multispectral filter is manufactured using a combination of coating and photolithographic technique, where sequential thin film coatings are coated according to the pattern of a photomask structured via the photolithographic method. Spliced multispectral filters are manufactured utilizing precision-regulated cutting and splicing techniques to integrate multiple spectral channels into a single filter. Both the photolithographic and spliced multispectral optical filters offer high transmission within the spectral channels, superior light selection competence, and deep out-of-band blocking. Our multispectral filters are remarkable when combined with an imaging sensor such as a CCD, CMOS, SWIR, MIDIR, and LWIR to select a specific spectral range to be imaged on several pixels. In addition, our multispectral filters are also an excellent substitute for the diffraction gratings in fiber spectroscopes.
