Custom Coatings

coated optics

Optical Coatings

Our ability to custom coat your optics in-house provides you with an all-inclusive optics manufacturing partner. This means we can personally ensure quality throughout and meet quicker turnaround times. LaCroix’s engineers can use a stock coating or create a custom coating to meet your specifications. From ARs and HRs to beamsplitters and cut-off filters, high-performance coatings deliver exceptional value.

In-House Coating Facility

Our in-house coating facility, recently expanded to 4,300 sq. ft. (Sep 2017) houses 7 coating chambers. Deposition coating technologies include resistive heat, electron-beam, ion-assisted and plasma assisted. Coatings can be deposited in a wide working range of 300 to 2100nm.

Coating Design

We have an extensive inventory of over 400 coating designs our engineers can use to provide a stock solution to your requirements. This can often lower you’re coating cost because we may be able to run multiple parts in the chamber. In the event a custom design is required our Coating engineer uses specialized software to design a coating to meet your spectral and environmental performance requirements.


  • Aluminum
  • Enhanced Aluminum
  • Dielectric
    • Long wave pass, Cold Mirror
    • Short wave pass, Hot Mirror
    • Bandpass Filters
    • Notch Filters
    • Dichroic (Color)
    • Beamsplitters, Polarizing and Non-Polarizing
    • Polarizers


  • ‘V’ Coats
  • Broadband
  • Dual Band
  • Multiband
  • Ultra-Broadband
  • Hydrophobic
  • MgF2
Coating Specifications High Reflectors Anti-Reflection
Wavelength Range 200 – 2100 nm 300 – 2100 nm
Damage Threshold
Plused 20 ns, 20 Hz @ 1064nm 40 J/cm2 40 J/cm2
CW 1 MW/cm2 1 MW/cm2


Available Services

We conduct in-house environmental testing to ISO 9211-1:1994E, MIL-F-48616, MIL-O-13830A, MILC-675C, MIL-C-48497A and MIL-M-13508C specifications for, but not limited to: adhesion, abrasion, humidity, temperature and solubility. Laser damage testing is also available upon customer request.

Test Equipment


  • Perkin Elmer Lambda 950
  • Perkin Elmer Lambda 900
  • Perkin Elmer Lambda 35’


  • Thermatron Oven
  • Salt Spray Chamber
  • Humidity Chamber

High performance coatings

From Ars (antireflective) to HRs (high reflectors) high performance coatings deliver exceptional value. Our optical coating technologies include: resistive heat deposition, e-beam deposition, ion assisted deposition, and plasma assisted deposition. Our customers can choose from over 180 existing designs or have one custom designed based on required performance. The ability to coat on site as part of the total production process allows us to meet tighter lead times and insure quality. Our high damage threshold coatings have competed and won against some of the best coating departments in the world.