640nm 850nm Narrow Double Bandpass Filter

It is subdivided from the band pass filter. Its definition is the same as that of the band pass filters. It allows the optical signal to pass in a specific band, and the optical signals on both sides that deviate from this band are blocked. However, the passband of narrow-band filter is relatively narrow, which is generally less than 5% of the central wavelength.

Features of 650nm narrow band filter: the technology of all dielectric hard film coating and the principle of dielectric interference are adopted. On the basis of highlighting the characteristics of narrow band pass filter, the optical performance is independent of the substrate thickness. The narrow band pass  filter produced by Borisun Optics is more convenient to be built into the instrument imaging system. The special optical material substrate is adopted to solve the problems of fog prone and unstable optical properties of traditional absorption synthetic glass. The products are produced according to the index needs of customers.