Coligh’s Standard 520nm Optical Bandpass Filter (FWHM 30nm)

The 520nm optical bandpass filter is engineered to transmit light centered at 520nm with a Full Width at Half Maximum (FWHM) of 30nm. This filter is ideal for applications that require efficient transmission of green light while blocking unwanted wavelengths. It is commonly used in fields such as fluorescence microscopy, spectroscopy, and laser systems for precise wavelength selection and high signal-to-noise ratio.

Standard Specifications:

• Type: VIS (Visible) Bandpass Filter, Interference Filter
• Coating Type: Hard-coated for long-term durability and stability
• Center Wavelength (CWL): 520nm ± 5nm
• Angle of Incidence: 0° ± 5°
• FWHM: 30nm ± 5nm
• Blocking Range: 200nm – 1100nm
• Blocking Depth: OD4 – OD6 or higher, ensuring effective suppression of out-of-band light
• Transmission Peak: > 85% at CWL
• Thickness: 1.0mm, 1.1mm
• Sizes Available: φ6mm, φ8mm, φ10mm, 12.5mm, φ25.4mm, φ50mm (custom sizes square or round available upon request)
• Clear Aperture: > 90%
• Material: B270, Fused Silica for excellent optical clarity and minimal absorption

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Custom Options:

• Bandwidth: Additional FWHM options available (e.g., 10nm, 20nm, 50nm) upon request.
• Angle of Incidence: Adjustable to suit specific system designs.
• Blocking Depth: Options for OD2, OD3, OD4, etc., tailored to unique application needs.
• Sizes: Round or square shapes, up to 150mm x 150mm.
• Material Thickness: Adjustable based on project requirements.
• Transmission & Blocking Range: Customizable within the 200nm to 1500nm range.

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Applications:

• Fluorescence Microscopy: Enhances imaging of green fluorescent proteins (GFP) and other fluorophores for clearer visualization.
• Spectroscopy: Provides accurate filtering for spectral analysis in scientific instruments.
• Laser Systems: Ideal for isolating 520nm green laser lines in industrial and scientific setups.
• Optical Communication: Optimizes signal clarity in visible light communication systems using the 520nm wavelength.
• Biomedical Imaging: Improves contrast and detection of green-emitting markers in diagnostics.
• Color Imaging & Photography: Enhances the capture of green tones in imaging systems for more accurate color reproduction.
• Lighting Applications: Supports specialized lighting systems where controlled green light is needed for displays and research.