BANDPASS FILTERS Alrad

BANDPASS FILTERS

BANDPASS FILTERS

MidOpt Bandpass Filters are specially designed for industrial imaging

  • Available in UV, VIS and NIR passbands
  • Achieve optimal contrast
  • Improve system control, repeatability and stability
  • Block interfering wavelengths, eliminating the need for shrouds
  • Increase resolution by reducing chromatic aberration
  • Anti-reflection coated for maximum transmission
  • Hard coated, single substrate fabrication
  • Exceptional surface quality; 40/20 scratch/dig

MOUNT & SIZE OPTIONS: In-stock, ready to ship Bandpass Filters are available in Threaded Mounts, sizes M13.25 to M105; 25.4® C-Mount; Slip Mounts; or Unmounted. Custom shapes and sizes are also available.

BANDPASS FILTER APPLICATIONS:
Bandpass Filters are used in a variety of industries, including machine vision,factory automation, security and surveillance, license plate recognition, medical and life science, agricultural inspection, aerial imaging, motion analysis, photography and cinematography.

BP Series Broad Bandwidth

  • Designed with a broad, Gaussian passband to mimic and accommodate the entire output of the most common LED wavelengths
  • Test the effects of monochromatic illumination
  • High transmission ≥90%*
  • Superior out-of-band blocking
  • StablEDGE® design reduces angular dependency and minimizes short-shifting effects
  • Double-side polished glass for exceptional parallelism and optical flatness
  • Available in sizes up to 165mm sq.

APPLICATIONS: BP Series are the most popular filters used in machine vision and factory automation systems and are a critical element in fluorescence imaging.

 

BN Series Narrow Bandwidth

  • 45-55nm FWHM*
  • Guaranteed peak transmission ≥85%
  • Superior out-of-band blocking
  • Designed for use with laser diodes and LEDs in applications with overwhelming ambient light
  • StablEDGE® design reduces angular dependency and minimizes short-shifting effects
  • Double-side polished glass for exceptional parallelism and transmitted optical wavefront
  • Available in sizes up to 165mm sq.

APPLICATIONS: BN Series are popular in outdoor applications where sunlight is present (ex. license plate recognition and security surveillance) and also in fluorescence applications to prevent cross-talk while blocking excitation illumination and ambient light.

Bi Series Narrow Interference Bandwidth

  • 20-35nm FWHM; Narrow bandwidth
  • High transmission ≥85%
  • Designed for use with laser diodes
  • Ideal wavelength separation when multiple light sources of similar wavelengths are present
  • Reflective, mirror-type surface that helps minimize thermal effects
  • Available in sizes up to 79.5mm sq.

APPLICATIONS: Bi Series are popular for life science and laser analysis applications where only discrete wavelengths need to be passed to maximize system performance.

*Applies in most cases