Altechna offers a wide range of high performance optical coatings on standard, custom or customer supplied optics.
Our coatings cover wavelength range from deep UV (193 nm) to far IR (25 µm) with biggest part of coatings done in wavelength ranges of most conventionally accessible laser and illumination sources from 266 nm to 2 µm.
We offer a set of standard and custom coatings per individual request:
- Anti-reflection coatings
- High reflection coatings
- Beam splitter coatings
- Partially reflective coatings
- Polarizer coatings
- Filter coatings
- Ultrafast GDD compensated coatings
- Gires-Tournois interferometer mirrors (GTI)
- Variable reflectivity mirrors
- Metallic coatings
At Altechna we aim to provide high damage threshold, high quality coatings for constantly growing photonics market with highest standards.
Each coating is special and over the years in the photonics field we have learned that flexibility is the key to meet high demands of our customers therefore our coatings are done using different technologies which are chosen for separate coatings individually. Here is our list of coating technologies available at Altechna:
- Electron beam evaporation
- Ion assisted deposition
- Ion beam sputtering
- Magnetron sputtering
Each technology is different and is used according to requirements of spectral sensitivity, damage threshold, hardness, surface quality etc.
| |
Electron beam
evaporation |
Ion assisted
deposition |
Ion beam
sputtering |
Magnetron
sputtering |
| Deposition Rate |
>10 Å/sec |
~10 Å/sec |
~3 Å/sec |
1-6 Å/sec |
| Coating area
per run |
3000 cm2 |
3000 cm2 |
500 cm2 |
2000 cm2 |
| Thermal
Conductivity |
Low |
Medium |
High |
High |
| Temperature
Range During Coating |
200 - 300°C |
20 - 100°C |
20 - 150°C |
20-100°C |
| Number
of Layers |
1-50 |
~50 |
200 |
Up to 200 |
| Density / Porosity |
Porous |
Dense |
Near bulk |
Near bulk |
| Adhesion / Durability |
Low |
Good |
Excellent |
Excellent |
| Humidity Sensitivity |
Yes |
Yes, small |
No |
No |
| Aging Effects |
Yes |
Yes, small |
No |
No |
| Intrinsic Stress |
< 100MPa |
~ 100MPa |
Few 100MPa |
Few 100 MPa |
Magnetron Sputtering Coating Features (PDF)
