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35degree incident 650nm narrowband filter 22*17*2.2mm square optical glass filter

  • glass optical filter
  • custom optical filter
  • factory offer optical filter
  • 650nm 35° optical filter

  • Precision narrow bandpass interference filter centered at 650 nm (red spectral region), designed for operation at a 35° angle of incidence (AOI) — the central wavelength shifts appropriately (~10–15 nm blue-shift vs. 0° design) to ensure peak transmission at 650 nm under tilted illumination. 

    Fabricated on a 2.2 mm thick rectangular N-BK7 (K9) or fused silica substrate with hard dielectric multilayer coating via ion-assisted deposition. 

    Provides sharp passband with deep blocking across UV–VIS–NIR. Ideal for folded optical paths, inclined beam combiners, fluorescence microscopy emission channels, and Raman/PL setups with non-normal incidence.

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    Description

    35degree incident 650nm narrowband filter 22*17*2.2mm square optical glass filter

    Specifications
    • Center Wavelength (CWL) @ 35° AOI: 650 nm ± 2 nm (Design CWL @ 0° typically ~662–668 nm to compensate for blue shift at 35°)
    • Half Bandwidth (FWHM): 10 nm / 20 nm / 30 nm (custom 5–50 nm)
    • Peak Transmittance (Tpeak): ≥ 80%–90% @ 650 nm (35° AOI)
    • Blocking Range: 300–1100 nm (or specified sub-ranges)
    • Blocking Level (Cut-off Depth): ≥ OD4 (0.01%) standard; OD5–OD6 optional
    • Substrate Material: N-BK7 (K9) / UV Fused Silica (JGS1)
    • Substrate Shape / Size: Rectangle 22.0 mm × 17.0 mm (+0.0 / −0.1 mm)
    • Substrate Thickness: 2.2 mm (±0.1 mm); other thicknesses on request
    • Surface Quality: 60-40 / 40-20 Scratch-Dig
    • Surface Flatness: λ/4 @ 632.8 nm
    • Parallelism: ≤ 3 arcmin (standard)
    • Angle of Incidence (Designed AOI): 35° ± 2° (0° / 45° also available)
    • Polarization Dependence: < 0.3% typical for s/p separation (note: AOI >20° introduces slight polarization splitting — specify if critical)
    • Coating Durability: Meets MIL-C-675C (humidity, adhesion, wipe resistance)
    • Edge Treatment: Ground / beveled; optional edge blackening on non-optical edges








    Factory custom optical filter,can cutom as your required,

    please contact our sales manager

    Contact: Rebecca Xu

    EmailL: rebecca@supplieroptical.com


    We are professional manufacture on the optical lenses &lasers for over 20 years experience.
    With the advanteges,we offer optical products in the fileds of University laboratory, Industry, Scientific research,Medical treatment, Mechanical equipments, lasers and Construction industry and so on.
    We can provide optical lenses, optical prisms, high-precision Powell prisms, right-angle prisms, laser lenses, filters, aspherical lenses, collimating lenses, optical glass lenses, optical reflectors, cylindrical lenses, laser modules, laser heads, optical glued lenses, optical rod mirrors, etc.
    Looking forward to communicating whether we have the opportunity to cooperate. For the lens/laser products you need, I would like to quote our competitive price.

    Please contact for any custom needs,
    Contact:Rebecca Xu

    Inquiry Us





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