Broadband AR Coating on Germanium
Andover 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|
|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|
|Operating Temperature||-62°C to +71°C|
|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|