1535nm narrow band filter infrared filter diameter 25.4mm thickness 2mm optical glass filter

1535nm narrow band filter infrared filter diameter 25.4mm thickness 2mm optical glass filter

glass optical filter

custom optical filter

factory offer optical filter

1535nm optical filter

Precision narrow bandpass interference filter centered at 1535 nm (Short-Wave Infrared / SWIR / Eye-Safe LIDAR band), designed to transmit a sharp 1535 nm ± band while blocking visible, NIR, and out-of-band SWIR wavelengths.

Fabricated on IR-grade substrate (Fused Silica / Ge / CaF₂ per design) with hard dielectric multilayer coating via ion-assisted deposition for high environmental stability.

The 1535 nm line is the standard eye-safe wavelength for LIDAR/ToF sensors and corresponds to Erbium-doped fiber amplifier (EDFA) C-band / L-band edge.

Ideal for eye-safe LIDAR receivers, fiber optic communications, gas sensing (H₂O/CO₂ reference), and SWIR hyperspectral systems. Available as stand-alone filter window or integrated into custom mounts.

Description

1535nm narrow band filter infrared filter diameter 25.4mm thickness 2mm optical glass filter customization

Specifications

Center Wavelength (CWL): 1535 nm ± 2 nm (1550 nm / 1625 nm also available)

Half Bandwidth (FWHM): 10 nm / 20 nm / 30 nm / 40 nm (custom)

Peak Transmittance (Tpeak): ≥ 60%–80% (substrate dependent; Fused Silica typical)

Blocking Range: 400–2200 nm (or specified sub-ranges)

Blocking Level (Cut-off Depth): ≥ OD3 / OD4 standard; OD5 optional

Substrate Material: UV Fused Silica (JGS1 — preferred for 1535 nm good T & low OH⁻), Germanium (Ge), CaF₂

Substrate Diameter: Ø25.4 mm (1″) — other sizes 10–100 mm available

Substrate Thickness: 2.0 mm (±0.1 mm); 1.0 / 3.0 mm optional

Surface Quality: 60-40 / 80-50 Scratch-Dig (IR-grade relaxed per agreement)

Surface Flatness: λ/4 @ 632.8 nm (reference) or λ/2 @ 10.6 µm equivalent

Parallelism: ≤ 1 arcmin

Incidence Angle: 0° ± 5° (AOI-tuned design on request)

Coating Durability: Humidity & thermal cycled per MIL-STD; soft brush clean only (IR coatings)

Edge Treatment: Ground / beveled; optional edge blackening

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