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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