Thin Film Coatings

When you need reliable, world-class, custom coating of optical components, Hardin Optical comes through. For even the most demanding projects across a range of industries, we provide application-ready optical solutions, combining high quality thin film coating technology with extensive custom optics fabrication capabilities to deliver precisely what you need — always on time, always on budget.

For imaging, illumination and laser applications, Hardin Optical has extensive experience providing thin film coating solutions for prominent defense, medical, university and industry customers.

Antireflection (AR) Coatings

  • MgF2 quarter wave
  • Single wavelength “V” coat
  • Multi-layer Broadband AR (BBAR)
  • VIS 400nm – 700nm
  • NIR 700nm – 1500nm
  • SWIR 1500nm – 3000nm
  • MWIR 3µm-5µm
  • Custom coatings in wavelengths from 225nm – 5.5µm
  • Coatings on materials including: Optical and Filter Glass, Si, Ge, ZnS, ZnSe, CaF2, BaF2, MgF2, various metals
  • Part size up to 340mm

Diamond Like Coating (DLC)

  • 3µm-5µm on Si
  • 3µm-5µm on Ge
  • 8µm-12µm on Ge
  • Passes all relevant MIL-SPEC testing
  • Part size up to 400mm

Inspection & Testing

  • Metrology Equipment
    • Lambda 950 (UV-VIS-NIR)
    • Spectrum 100 Optica (MWIR-LWIR)
  • Mil-Spec Testing:
    • Adhesion
    • Abrasion Moderate and Severe
    • Salt Solubility
    • Salt Spray/Salt Fog
    • Humidity
    • Temperature Cycle
    • Sand Slurry Wiper Test

Prototype to Production

  • Partnering Solution Based Approach from Initial Concept to High Volume Production
  • Engineering and Design for Manufacturability Support
  • Continuous Improvement Towards Long Term Goals
  • Focused Execution to meet Customer Commitments
  • Industry Leading Data Packages

Customer Focused

We listen to and collaborate with our customers as their partner, make meaningful commitments to them, and meet those commitments. We have an amazing team at Hardin, holding one another accountable to time tested core values and we believe it’s ultimately reflected in our products and relationships with our customers.    


  • Antireflection (AR) Coatings from UV (<225nm), VIS, to IR (>5.5 microns)
  • Solderable Gold
  • Aluminum
  • Beam Splitter Coatings
  • E-beam Evaporation with IAD
  • Mil-Spec Testing:
    – Adhesion
    – Abrasion
    – Humidity
    – Salt-Spray
    – Temperature
  • Metrology Equipment
    – Lambda 950 (UV-VIS-NIR)
    – Spectrum 100 Optica (MWIR-LWIR)

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