Coligh’s Standard 400nm Optical Bandpass Filter (FWHM 30nm)

The 400nm optical bandpass filter is engineered to transmit light centered at 400nm with a Full Width at Half Maximum (FWHM) of 30nm. This filter is designed for applications that require efficient transmission in the near-UV to violet region of the electromagnetic spectrum. With a balanced bandwidth, it offers high selectivity and minimal light loss, making it ideal for fluorescence microscopy, optical spectroscopy, and laser systems.

Standard Specifications:

• Type: UV/Visible Bandpass Filter, Interference Filter
• Coating Type: Hard-coated for enhanced durability and performance
• Center Wavelength (CWL): 400nm ± 5nm
• Angle of Incidence: 0° ± 5°
• FWHM: 30nm ± 5nm
• Blocking Range: 200nm – 1100nm
• Blocking Depth: OD4 – OD6 or higher, ensuring significant attenuation of out-of-band wavelengths
• Transmission Peak: > 90% at CWL
• Thickness: 1.0mm, 1.1mm
• Sizes Available: φ6mm, φ8mm, φ10mm, φ12mm, 12.5mm, φ25.4mm, φ50mm or any size square (custom sizes available upon request)
• Clear Aperture: > 90%
• Material: B270, Fused Silica for high optical clarity and low absorption

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Custom Options:

• Bandwidth: Additional FWHM options available (e.g., 10nm, 20nm, 40nm, 50nm, 60nm, 70nm) depending on the specific application.
• Angle of Incidence: Adjustable based on optical system requirements.
• Blocking Depth: Customizable from OD2 to OD6 to meet your specific needs.
• Sizes: Round or square, with custom sizes available up to 150mm x 150mm.
• Material Thickness: Adjustable for your project’s specifications.
• Transmission & Blocking Range: Customizable within the 200nm to 1500nm range.

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Applications:

• Fluorescence Microscopy: Ideal for isolating specific UV fluorescence emissions in biological samples or other materials.
• Optical Spectroscopy: Essential in analytical instrumentation for precise spectral analysis in the UV and violet regions.
• Color Imaging & Photography: Used in high-precision imaging where accurate wavelength control in the 400nm range is critical for detailed color reproduction.
• Laser Systems: Suitable for isolating specific wavelengths in laser-based applications, ensuring optimal laser line selection.
• Biomedical Imaging: Provides accurate filtering for biomedical applications where UV light excitation and detection are required, such as DNA analysis and certain types of microscopy.
• UV-based Research: Used in experiments requiring a narrow UV bandpass to study properties of materials or biological specimens in the UV spectrum.
• Optical Communication: Optimizes communication systems that utilize UV wavelengths for signal transmission and reception.