440nm band pass filter narrow band filter

440nm band pass filter narrow band filter

glass optical filter

custom optical filter

factory offer optical filter

440nm optical filter

Precision narrow bandpass interference filter centered at 440 nm (deep blue / royal blue spectral region), designed to transmit a sharp 440 nm ± 5–10 nm band while blocking UV (<400 nm) and visible/NIR (>460–1100 nm).

Hard-coated on UV-grade fused silica or N-BK7 glass via ion-assisted deposition for high environmental stability.

Ideal for blue laser diode (445 nm) isolation, fluorescence excitation (CFP / Pacific Blue), marine/aquarium lighting spectral shaping, and machine vision blue channel extraction.

Available as stand-alone filter windows or integrated onto plano-convex / aspheric lenses.

Description

440nm band pass filter narrow band filter custom filter

Specifications:

Center Wavelength (CWL): 440 nm ± 2 nm (435 / 445 / 450 nm on request)
Half Bandwidth (FWHM): 10 nm / 20 nm / 30 nm (custom 5–50 nm)
Peak Transmittance (Tpeak): ≥ 45%–65% (all-dielectric; >70% on fused silica)
Blocking Range: 300–1100 nm (or 200–1200 nm on request)
Blocking Level (Cut-off Depth): ≥ OD4 (0.01%) standard; OD5–OD6 optional
Substrate Material: UV Fused Silica (JGS1, preferred for deep UV-blue) or N-BK7 (K9)
Substrate Form: Plano-Plano Filter Window / Plano-Convex Lens with filter coating on flat side / Aspheric Lens + Filter Coating
Substrate Diameter: 10 mm – 150 mm (common Ø12.7 / Ø25.4 / Ø50 mm)
Substrate Thickness: 1.0 / 2.0 / 3.0 mm (windows); per lens design if integrated
Surface Quality: 60-40 / 40-20 Scratch-Dig
Surface Flatness (Window): λ/4 @ 632.8 nm
Parallelism: ≤ 1 arcmin (standard); ≤ 10 arcsec (precision)
Incidence Angle: 0° ± 5° (AOI-tuned design on request)
Coating Durability: Meets MIL-C-675C (humidity, adhesion, wipe resistance)

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