A 450nm optical bandpass filter with a Full Width at Half Maximum (FWHM) of 40nm permits light within a specific range of wavelengths centered around 450nm to pass through efficiently. The FWHM value of 40nm indicates that the filter has moderate spectral resolution, allowing transmission of light within approximately a 40nm range around the central wavelength of 450nm.

These types of filters find applications in various fields such as fluorescence microscopy, flow cytometry, optical sensing, and laser systems, where precise control over specific wavelengths of light is necessary for analysis, detection, or experimentation. Additionally, they are used in some types of LED lighting applications and optical communications.

Coligh’s stock standard 450nm optical bandpass filter FWHM 40nm feature:

• Feature: VIS bandpass filter
• Center wavelength: 450nm±10nm
• Angle of incidence: 0°
• FWHM: 40nm±10nm
• Blocking range: 200-1100nm
• Blocking depth: OD4, OD6 and above
• Transmission average: Above 90%
• Thickness：1.0mm, 1.1mm
• Size: φ8mm, φ10mm, φ12.5mm, φ25.4mm, φ50mm mounted or unmounted
• Material: B270, K9, Fused silica
• Other stock bandwidth for reference: 10nm, 20nm, 30nm, 50nm, 70nm

Custom option:

• Bandwidth: any bandwith client request
• Angle of incidence: Depend on request
• Blocking depth:  OD4, OD5, OD6, OD8
• Bandwidth: Narrow to 1nm
• Size: round or square smaller than 150*150mm
• Material thickness: Depend on request
• Transmission and blocking rang: custom as per requirement or between 200nm to 1500nm