Overview
The Midwest Optical BP660-25.5 bandpass filter is a precision optical component engineered for industrial machine vision applications. This dark red bandpass filter passes wavelengths between 640–680 nm, making it ideal for use with 650–680 nm LED and laser diode lighting systems. The filter features anti-reflection coating, hard-coated single substrate fabrication, and M25.5 × 0.5 thread mounting for direct installation into standard lens or camera mounts.
Key Features
- Anti-reflection coated for maximum transmission
- Hard coated, single substrate fabrication with exceptional surface quality (40/20 scratch/dig)
- Peak transmission >90% with ±10 nm tolerance
- Blocks interfering wavelengths, eliminating the need for shrouds
- Increases resolution by reducing chromatic aberration
- Ample passband and excellent in-band transmission work well with all camera-related applications
Technical Specifications
- Wavelength Range (Useful): 640–680 nm
- Center Wavelength: 660 nm
- Full Width Half Maximum (FWHM): 65 nm
- Peak Transmission: >90%
- Wavelength Tolerance: ±10 nm
- Surface Quality: 40/20 scratch/dig
- Thread Type: M25.5 × 0.5
- Substrate: Hard-coated optical glass
- Weight: 0.26 lb
- Coating: Anti-reflection multilayer
Typical Applications
- Machine vision systems for factory automation
- Security and surveillance imaging
- License plate recognition systems
- Medical and life science imaging
- Agricultural inspection and sorting
- Aerial imaging and motion analysis
- Photography and cinematography
- Camera-related applications using 640–680 nm LED and laser diode lighting
Compatibility & Replacements
Compatible With
- Any lens or camera with M25.5 × 0.5 filter thread
- Industrial cameras with standard filter mounts
- Lens-mounted applications requiring optical filtration
- LED and laser diode light sources (640–680 nm)
- Color and monochrome imaging systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The BP660-25.5 is the M25.5 thread variant of the MidOpt BP660 dark red bandpass filter series and may replace other dark red bandpass filters with matching M25.5 thread specifications.
Works With
- 650–680 nm LED and laser diode lighting systems
- Standard machine vision software and imaging platforms
- Industrial automation systems requiring optical filtering
- Step-down and step-up lens adapter rings for size conversion
