• Due to the typhoon in Japan, large-scale blackout have occurred in Narita city where Misumi Shipping center is located, and the recovery is being delayed. (Newspaper article https://the-japan-news.com/news/article/0005997110 source: The Japan News) Because of the above reason, delivery of some products may be delayed. We apologize for any inconvenience and thank you for your understanding.


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· A filter with a spectral width (half width) between 1 nm and 40 nm that can be used to transmit only the light in specified wavelengths.
· It is used when extracting only a specific spectrum from the emission line lamp or from a laser oscillating at multiple wavelengths.
· The use of a multilayer film coating consisting of a dielectric film and a metal film has realized a sharp rise and reliable shutout of the wavelength region to be blocked.
· 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 within the region of 214 nm ultraviolet to 1,550 nm infrared.
· □ A large 50 mm interference filter (VPF-50S) and an interference filter (YIF) with high transmittance are 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.
· * The center wavelength tolerance has been set to the long wavelength side in order to take into account the angle dependence of the interference filter.
· * The specifications of each filter are values at a temperature of 23°C.
· * Wavelength shifts to the long wavelength side as temperature rises.
· * Precision adjustment of each individual filter is carried out to achieve high performance.
· * Therefore, thickness varies depending on each filter.
· * Interference filters absorb light and thus cannot be used for high power lasers or high energy pulse lasers.
[Product Specifications]
· [ Common Specifications]
· Shielding Area Transmittance: < 0.01% (1 nm-3.0 μm)
· Scratch-Dig: 80-50
· Incidence Angle: 0°
· Coating: Dielectric Multilayer Film Coating, Metal Coating
· [Individual Specifications]
· Center Wavelength: 441.6 +3.0/-0.0 nm
· Laser or Bright Line Spectrum: He-Cd
· Half Width: 10.0 ± 2.0 nm
· Maximum Transmittance: >45%
· Thickness t: <7 mm
· Type: Wide Band

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Part Number : 61-6882-72
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