VPFHT-25C-7800 Interference Filter

[Features]
· This filter is able to pick out light in a specific wavelength region.
· Extremely high transmittance can be obtained in the transmittance band.
· Slightly away from the transmission band, it falls steeply, and there is almost no transmission in the neighborhood of the transmission band.
· Since it uses dielectric multilayer film with little absorption, it has high transmittance and can efficiently separate specified wavelengths.
· As the interference filter is fixed to the metal frame, it is easy to fix it to the holder and to handle the element.
· Different filters can be selected for different wavelengths from 325 nm ultraviolet to 1,064 nm near infrared.
· An interference filter (VPF) with wider stopband is also available.
· * The characteristics of interference filters depend on the angle of incidence, and when the angle is inclined to the optical axis, the center wavelength shifts to the short wavelength side and transmittance also decreases.
· * Have light parallel to the optical axis or nearly parallel to it at an incident angle of 0 degrees.
· * The narrower the half value width, the greater the angle dependency.
[Product Specifications]
· [ Common Specifications]
· Coating: Dielectric Multilayer Film
· Incidence Angle: 0°
· Maximum Transmittance: ≥ 90%, ≥ 80% (VPFHT-3250, VPFHT-3550), ≥ 85% (VPFHT-36380, VPFHT-3720)
· Effective Diameter: φ8.5 mm (φD=φ12.5 mm), φ22 mm (φD=φ25 mm)
· Scratch-Dig: 60-40
· [Individual Specifications]
· Center Wavelength: 780 nm
· Outer diameter φD: φ25 mm
· Half Width: 4.25 ± 1.25 nm
· Short Wavelength Side Cut Band (OD5 Band): 609.0 to 772.2 nm
· Short Wavelength Side Cut Band (OD6 Band): 717.6 to 768.3 nm
· Long Wavelength Side Cut Band (OD5 Band): 787.8 to 1,201.8 nm
· Long Wavelength Side Cut Band (OD6 Band): 791.7 to 858.0 nm