BP405-4nm Bandpass Filter | CWL 402nm, FWHM 4nm, OD>3

BP405-4nm Bandpass Filter | CWL 402nm, FWHM 4nm, OD>3

OPTOStokes BP405-4nm is a precision narrow Bandpass Filter designed for selective 402nm signal transmission. With transmission above 60% at 402nm, a 4±1nm FWHM, and OD>3 blocking from 200-1100nm, it helps isolate blue-violet signals and suppress unwanted broadband light in optical detection systems.

Technical Specifications

Applications

The narrow passband makes BP405-4nm suitable for 3D scanning and structured-light systems where spectral selectivity is required. It can be used to isolate blue structured-light signals from ambient or broadband optical background, helping improve signal discrimination at the detector.

Customization & Service

OPTOStokes supports custom optical filter requirements for OEM and instrument integration. BP405-4nm can be supplied in round, square, or other specified shapes, with mounting ring options available for mechanical integration. In-stock options support faster selection, while custom coating and dimensional requirements can be reviewed for project-specific designs.

Pain Points & CTA

For optical engineers and purchasing teams, the critical considerations are usually spectral accuracy, blocking performance, mechanical compatibility, and delivery reliability. OPTOStokes provides both ready-to-select filters and customized solutions with controlled quality and lead times. For drawings, quantities, mounting requirements, or a project-specific quotation, contact sales@optofilters.com or submit an inquiry through the website.