Coligh’s Standard 400nm Optical Bandpass Filter FWHM 27nm

The 400nm optical bandpass filter is designed to transmit ultraviolet and violet light centered at 400nm, with a Full Width at Half Maximum (FWHM) of 27nm. This filter offers excellent performance for applications requiring high precision and reliability in UV and visible light control, such as fluorescence imaging, spectroscopy, and optical communication.

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Standard Specifications:

• Type: UV/VIS Bandpass Filter, Interference Filter
• Coating Type: Hard-coated for superior durability and stability
• Center Wavelength (CWL): 400nm ± 2nm
• Angle of Incidence: 0° ± 5°
• FWHM: 27nm ± 3nm
• Blocking Range: 200nm – 1100nm
• Blocking Depth: OD4 – OD6 or higher, ensuring strong suppression of out-of-band wavelengths
• Transmission Peak: > 80%
• Thickness: 1.0mm, 1.1mm, 0.7mm, 0.5mm, 0.3mm
• Sizes Available: φ6mm, φ8mm, φ10mm, φ12.5mm, φ25.4mm, φ50mm (custom sizes available on request)
• Clear Aperture: > 90%
• Material: float glass, B270, Fused Silica for excellent optical clarity and low absorption

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Custom Options:

• Bandwidth: Custom FWHM options (e.g., 10nm, 15nm, 20nm, 25nm, 30nm, 35nm, 40nm, 45nm, 50nm) to meet specific needs.
• Angle of Incidence: Adjustable for non-perpendicular light paths.
• Blocking Depth: Custom OD levels (OD2, OD3, OD4, or higher) based on system requirements.
• Sizes: Round or square shapes up to 150mm x 150mm.
• Material Thickness: Tailored to user specifications for compatibility with optical setups.
• Transmission & Blocking Range: Adjustable from 200nm to 2000nm to suit unique applications.

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Applications:

• Fluorescence Microscopy: Ideal for isolating fluorescent signals in the UV/violet range.
• Spectroscopy: Ensures precise wavelength selection for material and chemical analysis.
• Analytical Instruments: Supports high-performance filtering for UV-sensitive detection systems.
• Biomedical Imaging: Enhances clarity and contrast in diagnostics involving violet and UV light.
• UV Curing Systems: Suitable for controlling UV exposure in curing applications.
• Laser Systems: Efficiently isolates 400nm laser lines for precision tasks.
• Optical Communication: Provides reliable filtering for systems requiring UV/violet light isolation.