Optical Filters-Coligh’s Standard 512nm Optical Bandpass Filter (FWHM 18nm)

The 512nm optical bandpass filter is designed to transmit visible light centered at 512nm with a Full Width at Half Maximum (FWHM) of 18nm. This filter provides high selectivity for precise wavelength filtering, making it ideal for applications requiring accurate measurements and enhanced imaging.

Standard Specifications:

• Type: VIS (Visible) Bandpass Filter, Interference Filter
• Coating Type: Hard-coated
• Center Wavelength (CWL): 512nm ± 2nm
• Angle of Incidence: 0° ± 5°
• FWHM: 18nm ± 3nm
• Blocking Range: 200nm – 1100nm
• Blocking Depth: OD4 – OD6 or higher
• Transmission Peak: > 85%
• Thickness: 1.0mm, 1.1mm
• Sizes: φ12.5mm, φ25.4mm, φ50mm (other sizes available upon request)
• Clear Aperture: > 90%
• Material: B270, Fused Silica

---

Custom Options:

• Bandwidth: Custom FWHM options (e.g., 10nm, 12nm, 15nm, 16nm, 20nm, 25nm, 30nm, 35nm, 40nm) available upon request.
• Angle of Incidence: Adjustable according to application needs.
• Blocking Depth: Options for OD2, OD3, OD4, etc.
• Sizes: Round or square, up to 150mm x 150mm.
• Material Thickness: Tailorable based on specific project requirements.
• Transmission & Blocking Range: Customizable within 200nm to 1500nm range.

---

Applications:

• Color Imaging & Photography: Enhances the green light spectrum for more accurate color reproduction.
• Fluorescence Microscopy: Ideal for exciting and detecting specific fluorophores with precision.
• Spectroscopy: Provides highly accurate spectral filtering for scientific analysis.
• Optical Communication: Enhances data transmission in visible light communication systems.
• Biomedical Imaging: Assists in isolating specific wavelengths for diagnostic imaging.
• Spectral Sensing: Useful for environmental and material sensing applications.
• Lighting Applications: Provides controlled light for use in various lighting applications.