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Technological Capabilities

Coating types

Highly reflective
Anti-reflective
Partially reflective
Wavelength separating
Broadband coatings
Polarizing coatings

Available Coating Technologies

Magnetron Sputtering

Magnetron Sputtering

PROS:

  • Big load volumes – the best solution for mass production
  • Unit price is lower than IBS coated element
  • Most of the coating properties are identical to IBS properties – very low scattering and absorption losses, almost bulk-like layer density, excellent environmental stability, very high spectral accuracy, high LIDT in VIS, IR range
  • Stress is lower than in IBS coatings
  • Excellent solution for custom shape and size substrates

CONS:

  • Expensive for small volumes
  • No UV capabilities at the moment, technology under development

Ion Beam Sputtering

Ion Beam Sputtering

PROS:

  • Very high spectral coating accuracy
  • Lowest scattering and absorption losses
  • Highest LIDT in VIS – IR range
  • Excellent stability and performance in harsh environments (space, defense applications)
  • Stress-controlled by complementary processes

CONS:

  • Expensive

Ion Assisted Deposition

Ion Assisted Deposition

PROS:

  • IAD or PIAD option available
  • Almost no sensitivity to temperature and humidity
  • Low stress coatings (controlled by the source parameters)
  • Stress-controlled cost-performance ratio

CONS:

  • Smaller variety of coating materials available

Electron Beam Evaporation

Electron Beam Evaporation

PROS:

  • Wide spectral range – from MUV to IR
  • High deposition rates
  • Low stress coatings
  • Good cost-performance ratio

CONS:

  • Sensitive to humidity and temperature of the environment
Magnetron Sputtering Ion Beam Sputtering Ion Assisted Deposition Electron Beam Evaporation
Spectral ranges From VIS to IR-B From MUV to IR-B From MUV to IR-B From MUV to IR-B
Deposition rate 2-6 Å/sec 1-3 Å/sec 1-5 Å/sec >5 Å/sec
One inch substrates per run 518 pcs. 53 pcs. 90 pcs. 90 pcs.
Thermal conductivity High High Medium Low
Temperature range during process 20-200 °C 20-100 °C 20-100 °C 200-300 °C
Density / Porosity Near bulk Near bulk Dense Porous
Adhesion / Durability Excellent Excellent Good Low
Sensitivity to humidity No No Yes, small Yes
Aging effects No No Yes, small Yes
Coating spectral accuracy High High Medium Low
Maximum HR @ 1064 reflectivity >99.96 % >99.99 % 99.9 % 99.5-99.8 %
Intrinsic stress 200-400 MPa 300-600 MPa ~100 MPa <100 MPa

Spectral performance

Optomechanical Engineering

  • Custom optomechanical system design as per application requirements
  • Customized optical system with 6 weeks delivery
  • Moving lens systems with pointing stability: <0.1 mrad
  • Lens movement speeds up to – 0.3 m/s
  • UV-compatible solutions
  • Optomechanical designs are made using SolidWorks

Assembling

  • Customer-defined product assembling (optics + mechanics)
  • UV and thermal adhesive curing ovens
  • Laser engraving
  • Clean environment – laminars

Optical Design

  • Optical system development according to customer-specific application
  • High Laser Damage threshold design approach
  • Designs are made using ZEMAX software