MultiBandpass Filter 440/520/690

The MultiBandpass Filter 440/520/690 delivers precise spectral transmission across three distinct wavelength bands—440 nm (blue), 520 nm (green), and 690 nm (deep red)—engineered for multi-channel fluorescence microscopy, flow cytometry, and spectroscopic imaging applications.

Key Features

• Triple-band transmission: High throughput at 440 nm, 520 nm, and 690 nm with steep edge transitions for minimal crosstalk
• Deep blocking: OD 4+ rejection outside passbands ensures clean signal isolation
• Durable hard coatings: Ion-assisted deposition for long-term stability in demanding lab environments
• Low autofluorescence: Optimized substrate and coating materials minimize background noise
• Standard 25 mm diameter: Drop-in compatibility with most microscope filter cubes and optical mounts

Applications

Ideal for multi-color fluorescence imaging with DAPI/CFP, GFP/FITC, and Cy5/Alexa Fluor 647 dye combinations. Supports simultaneous excitation or emission filtering in confocal, widefield, and flow cytometry systems.

Specifications

Substrate: High-grade optical glass | Coating: Hard dielectric multilayer | Diameter: 25 mm ±0.1 mm | Thickness: 3.0 mm ±0.2 mm | Surface quality: 40-20 scratch-dig | Transmitted wavefront error: λ/4 @ 633 nm

Each filter ships with a spectral transmission curve and is backed by our standard warranty. Custom diameters and OEM volumes available upon request.