340nm is in the ultraviolet (UV) range of the electromagnetic spectrum, which is invisible to the human eye.The filter is designed to isolate a specific wavelength range around 340nm.

340nm bandpass filters are commonly used in fluorescence microscopy, where they can be used to selectively excite fluorophores that absorb light in the ultraviolet (UV) range. They are also used in UV curing processes, where they can help to control the intensity and wavelength of the UV light source.

Coligh’s  stock standard 340nm bandpass filter feature:

• Feature: UV interference bandpass filter
• Center wavelength: 340±2nm
• FWHM: 10±2nm
• Blocking range: 200-1100nm
• Transmission: Above 70%
• Blocking depth: OD4
• Size: φ8,φ10,φ12,φ12.5, φ25.4,φ50mm mounted or unmounted
• Thickness: 4mm or 6mm mounted

Custom option:

• Bandwidth: 8nm, 10nm , 12nm, 15nm, 20nm,, 40nm, 60nm, 70nm or other bandwidth client requests
• Blocking depth: OD3, OD4, OD6, OD8
• Size: 6*6mm, φ8,φ10,φ12,φ12.5,φ12.7,φ15,φ25,φ25.4,φ30mm,φ50mm, 50*50mm or Custom size round or square smaller than 100mm
• Thickness: 1mm or depend on client’s request
• Transmission and blocking rang: custom as per requirement