Technical Details of Optical Coatings
Anti-Reflection Coatings
Anti Reflection Coatings increase the overall transmission of optical systems by minimizing surface reflections. SCHOTT offers a broad portfolio of AR coating types tailored for a wide range of applications, including imaging, Laser, and defense and aerospace, covering the wavelength range from DUV to IR.
| Coating Type | Wavelength Range (nm) | Reflectance | AOI typical | LIDT | Scratch / Dig | Sizes up to |
|---|---|---|---|---|---|---|
| V-shape AR | 248 - 1650 | < 0.1 % | 0° - 15° | - | Up to 20/10 | Ø 300 mm |
| Broadband AR | 248 - 1650 | < 0.5 % | 0° - 15° | - | Up to 20/10 | Ø 300 mm |
| Scratch Resistant Hard AR | 420 - 1100 | < 1.5 % | 0° - 30° | - | 40/20 up to 20/10 | Ø 300 mm |
| Low Defect AR | 380 - 780 | < 0.5 % | 0° - 15° | - | < 10/5 | 60 x 60 mm² |
| Laser Line AR | 500 - 1650 | < 0,2 % | 0° - 15° | 30 J/cm²(1064 nm, 10 ns) 10 J/cm² (532nm, 10 ns) |
20/10 up to 10/5 | 150 x 150 mm² |
| Multi Line AR | 248 - 1650 | < 1 % | 0° - 15° | 20 J/cm² (1064 nm, 10 ns) | 20/10 up to 10/5 | Ø 300 mm |
Other AOI ranges are available upon request. Reflectance depends on the required bandwidths and number of laser lines or bands. LIDT values depend on the laser type, pulse duration and wavelength.
Mirror Coatings
SCHOTT mirrors provide the highest reflectivity for a wide spectral range, enabling the precise steering of light. Our portfolio of metallic and dielectric mirror coatings provides the ideal tailored solution, especially in high power laser applications and beam steering.
| Coating Type | Wavelength Range (nm) | Reflectance | AOI typical | LIDT | Scratch / Dig | Sizes up to |
|---|---|---|---|---|---|---|
| Broadband Dielectric Mirror | 248 - 1650 | > 99 % | 0° - 45° | - | Up to 20/10 | Ø 300 mm |
| Laser Line Dielectric Mirror | 248 - 1650 | > 99.95 % | 0° - 45° | 30 J/cm²(1064 nm, 10 ns) 10 J/cm² (532nm, 10 ns) |
40/20 up to 10/5 | Ø 300 mm |
| Multi Line Dielectric Mirror | 420 - 1100 | > 99.9 % | 0° - 45° | 20 J/cm² (1064 nm, 10 ns) | 40/20 up to 10/5 | Ø 300 mm |
| Metallic Mirrors (protective & enhanced) |
Al: 200 - 15,000 Ag: 450- 15,000 Au: 600- 15,000 |
> 85 % > 97 % > 96 % |
0° - 60° | - | 40/20 | Ø 300 mm |
Other AOI ranges are available upon request. Reflectance depends on the required bandwidths and number of laser lines or bands. LIDT values depend on the laser type, pulse duration and wavelength.
Edge and Bandpass Filters
Dielectric edge and bandpass filters enable precise control of the light spectrum. Our broad portfolio of bandpass, shortpass and longpass filters covers a broad spectral range. By utilizing IAD and sputtering, we ensure the highest precision and durability for our filters.
| Coating Type | Transmission Range (nm) |
Passband Transmission | FWHM | CWL Tolerance | Slope | Edge / FWHM Tolerance | Blocking Range (nm) | Blocking | Scratch / Dig | Typical Sizes (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| Bandpass Filter | 280 - 2500 | Ø > 95 % | 25 – 150 nm typical | +/- 1 % | < 0.5 % | +/- 1 % | 200 – 5000 | > OD3 up to > OD6 |
60/40 up to 20/10 | 5 x 5 up to Ø 200 |
| Narrow Bandpass Filters | 350 - 2000 | Ø > 95 % | < 2% CWL | +/- 0.3 % | < 0.5 % | < 1 nm | 200 – 5000 | > OD 4 up to > OD 6 |
60/40 up to 20/10 | 5 x 5 up to Ø 100 |
| Extremely-Narrow Bandpass Filter | 450 - 1100 | Ø > 90 % | < 1 % CWL | +/- 0.2 % | < 0.5 % | < 0,5 nm | 200 – 5000 | > OD4 up to >OD 6 |
60/40 up to 20/10 | 5 x 5 up to Ø 70 |
| Multi-Bandpass Filter | 280 - 2500 | Ø > 90 % | 20 – 25 nm typical | +/- 0.2 % | < 1 % | +/- 1 % | 200 – 5000 | > OD4 up to >OD 6 |
60/40 up to 20/10 | 5 x 5 up to Ø 150 |
| i-line Bandpass Filter | 365, 405, 463 | min. > 80 % | < 3 nm | +/- 0.2 % | < 0.5 % | < 0,5 nm | 220 - 450 | OD 2 - 3 | 40/20 | Ø 100 up to Ø 160 |
| UV-Bandpass Filter | 200 - 350 | 15 - 30 % | 6 - 15 nm | +/- 0.5 % | < 5 % | < 2 % | 200 - 600 | > OD 4 | 40/20 | Ø 10 up to Ø 25 |
| Multi-Notch Filters | 280 - 2500 | Ø > 90 % | 20 – 25 nm typical | +/- 0.2 % | < 1 % | < 0,5 % | 200 – 5000 | > OD 4 up to > OD 6 | 60/40 up to 20/10 | 5 x 5 up to Ø 150 |
| Steep Edge Short- & Longpass Filters | 280 - 2500 | Ø > 95 % | - | - | < 0.5 % | +/- 0,2 % | 200 – 5000 | > OD4 up to >OD 6 |
60/40 up to 20/10 | 5 x 5 up to Ø 70 |
