Coligh’s Standard 650nm Optical Bandpass Filter (FWHM 50nm)

The 650nm optical bandpass filter is designed to transmit light centered at 650nm with a Full Width at Half Maximum (FWHM) of 50nm, ensuring precise wavelength selection within the red region of the visible spectrum. This filter provides high transmission efficiency and excellent out-of-band blocking, making it an ideal choice for applications requiring accurate color isolation and enhanced spectral performance.

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Standard Specifications:

• Type: VIS Bandpass Filter, Interference Filter
• Coating Type: Hard-coated for durability and environmental resistance
• Center Wavelength (CWL): 650nm ± 5nm
• Angle of Incidence: 0° ± 5°
• FWHM: 50nm ± 5nm
• Blocking Range: 200nm – 1100nm
• Blocking Depth: OD2-OD3 or higher
• Peak Transmission: > 90%
• Thickness: 1.0mm, 1.1mm, 0.7mm, 0.5mm, 0.55mm, 0.3mm
• Sizes Available: φ12.5mm, φ25.4mm, φ50mm, or custom dimensions upon request
• Clear Aperture: > 90%
• Material: Float glass, B270, D263T for superior optical clarity and low absorption

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Custom Options:

• Bandwidth: Adjustable to 20nm, 30nm, 40nm, 60nm, 70nm, 80nm or as requested
• Angle of Incidence: Configurable for tilted light applications
• Blocking Depth: Custom OD levels (e.g., OD3, OD4, OD5, OD6)
• Sizes: Round or square formats up to 150mm x 150mm
• Material Thickness: Customizable to fit specific optical system requirements
• Transmission & Blocking Range: Tailorable between 200nm – 2000nm

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Applications:

• Color Imaging and Photography: Enhances image quality by isolating the red spectrum.
• Lighting Applications: Optimizes light output for display and illumination systems.
• Laser Systems: Isolates specific laser lines for precision tasks.