Coligh’s Standard 650nm Optical Bandpass Filter (FWHM 80nm)

The 650nm optical bandpass filter is designed to transmit light centered at 650nm with a wide Full Width at Half Maximum (FWHM) of 80nm, making it an ideal solution for applications requiring high light throughput and broad spectral coverage in the red region of the visible spectrum. Its robust construction and superior optical properties ensure reliable performance across various demanding applications.

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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: 80nm ± 5nm
• Blocking Range: 300nm – 1100nm
• Blocking Depth: OD2-OD3 or deeper blocking depth
• Peak Transmission: > 90%
• Thickness: 0.3mm, 0.5mm, 0.55mm, 0.7mm,  1.0mm, 1.1mm
• Sizes Available: φ12.5mm, φ25.4mm, φ50mm, or custom sizes upon request
• Clear Aperture: > 90%
• Material: Float glass, D263T, B270, color glass

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Custom Options:

• Bandwidth: Customizable to 50nm, 60nm, 100nm, or as required
• Angle of Incidence: Adjustable 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: Adaptable to meet specific optical system requirements
• Transmission & Blocking Range: Tailored between 200nm – 2000nm

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Applications:

• Color Imaging and Photography: Enhances red light isolation for superior image quality.
• Spectroscopy: Ensures reliable spectral measurements with broad wavelength selection.
• Lighting and Displays: Optimizes color output for illumination and display technologies.
• Laser Systems: Isolates and enhances red laser lines for precision tasks.