Our partner
Broadband AR coating on germanium
from AndoverAndover produces a non-radioactive dielectric multilayer coating designed to reduce the reflection of Germanium substrates in the infrared. Reflection is reduced from 36% per surface to less than 1% per surface.
Constructed of hard, durable first-surface dielectric coatings on optical-quality germanium substrates, these filters will withstand cleaning and handling associated with any high-quality optical component.
For your convenience and economy, we offer the filters in two standard sizes: 25 mm and 50 mm dia. However, we can produce custom sizes and shapes, as well as custom optical characteristics. Contact our expert on the right for a quotation.
- Reduces reflection from 36% to 1% per surface
- Constructed of hard, durable and non-radioactive materials
- Meets MIL-C-48497
Specifications
| General Specifications | |
|---|---|
| Thickness | 1.0±0.2 mm |
| Diameter Tolerance | +0/-0.1 mm |
| Min. Clear Aperture | 90% of outside dimension |
| Substrate Material | Germanium (other substrates available |
| Flatness | 2 waves at 632.8 nm |
| Parallelism | < 10 arc minutes |
| Sufrace Quality | 60/40 per MIL-C-48497A |
| Coating Quality | 60/40 per MIL-C-48497A |
| 24-hour humidity | per MIL-C-48497A |
| Moderate Abrasion | per MIL-C-48497A |
| Adhesion | per MIL-C-48497A |
| Operating Temperature | -62°C to +71°C |
| Mechanical | Unmounted |
| Optional | Mounted in threaded ring |
 |  |
 |  |
| AR Coating | 25 mm Ø | 50 mm Ø |
|---|---|---|
| 3-5 µm coated Germanium Window | GEBBAR-3-5-25 | GEBBAR-3-5-50 |
| 8-12 µm coated Germanium Window | GEBBAR-8-12-25 | GEBBAR-8-12-50 |
| 8-14 µm coated Germanium Window | GEBBAR-8-14-25 | GEBBAR-8-14-50 |
| 2-14 µm coated Germanium Window | GEBBAR-2-14-25 | GEBBAR-2-14-50 |
Applications
Thermal Imaging
Detector Windows
Dewar Windows
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Quantum Design GmbH
Breitwieserweg 9
64319 Pfungstadt
Germany
| Phone: | +49 6157 80710-0 |
| Fax: | +49 6157 807109 |
| E-mail: | germanyqd-europe.com |
