기능

• A filter that extracts light in a specific wavelength range.
• Very high transmittance is achieved in the transmission band.
• A short distance from the transmission band causes a steep drop, with little transmission near the transmission band.
• Since a dielectric multilayer film with low absorption is used, the transmittance is high and the specified wavelength can be separated efficiently.
• Since the interference filter is fixed to the metal frame, it is easy to fix to the holder and handle the element.
• Filters can be selected from a number of wavelengths ranging from 325 nm ultraviolet to 1064 nm near-infrared.
• An interference filter (VPF) with a wider cutoff band is also available.
• * The characteristics of the interference filter depend on the incident angle. When the angle is tilted to the optical axis, the center wavelength moves to the short wavelength side, and the transmittance also decreases.
• * Enter a parallel beam or a light close to the parallel beam at 0° to the optical axis.
• * The narrower the half-width, the greater the angular dependency.