Custom Optical Filters

Custom Optical Filters

ECI manufactures all types of high performance optical filters over the range from 240-2600nm.  Thin film designs are deposited with Ion Beam Sputtering (IBS), Leybold APS or Ion-Assisted E-beam (IAD) deposition systems to ensure that the coatings meet your required optical performance, laser damage threshold and environmental stability.

Clean room facilities are available to ensure compliance with your most demanding surface quality requirements. High performance optical filter coatings are deposited on wafers, custom optics, polymers, fibers, crystals, semiconductors, garnet and glass substrates up to 200mm in diameter.

ECI's design team is always available to work with you to identify the optimum design for your system. Sample designs can be generated to illustrate the theoretical coating performance for your particular angle of incidence, substrate, incident medium and wavelength region.

ECI manufactures Optical Filter Coatings for a wide variety of applications including:

  • Laser Safety
  • Sensing applications
  • Detector trimming
  • Biomedical laser systems
  • Aerospace
  • Telecommunications


Designs meet or exceed the environmental requirements of MIL-C-48497.

Please click on graph for larger version
Bandpass Optical Filter ECI 1020

Examples of LDT

High Laser Damage Threshold Highly Reflective & Filter Coatings
WavelengthLDT*Pulse width
355 nm 2 J/cm2 20 ns
532 nm 6 J/cm2 20 ns
1030 nm 0.47 J/cm2 319 fs
1064 nm 40 J/cm2 20 ns

*Typical values verified through independent test laboratories. Actual LDT performance is dependent on substrate selection, surface preparation, and system design.

Broadband Pass Optical Filters ECI 1020
Long Wave Pass & Short Wave
Pass Optical Filters
ECI 1010 SWP & LWP
Dichroic Optical Filters ECI 1010
Rejection Optical Filters ECI 1020
Edge Pass Optical Filters ECI 1010
Neutral Density (ND) Optical Filters ECI 2593


Contact our design team to discuss your specific optical filter application!