Product Description

Limet vacuum provides a recessed vacuum observation window. MPF provides mainstream window design and standard concave tube design, which can be used for sapphire, fused silica and remote observation window. This type of design is very practical for connecting complex lens components, such as cameras, telescopes, and zoom lenses extended into vacuum systems.

Technical parameters of concave vacuum observation windows Viewports:

Model:

Leakage rate:<2x10 (-10) atm cc/sec He

Parallelism:

UV level:<30 Arc Minutes

DUV level:<10 Arc Seconds

Flange material: 304/316 LN Stn Stl

Flatness: DUV: l/4 @ 632nm Transmitted Wavefront

Surface polishing degree:

UV rating: 40/20

DUV level: 20/10

Heat range: -100 ˚ C to 200 ˚ C

Material: Corning HPFS 7980 Fused Silica

Sensing:

UV level:>90% @ 250nm (external)

DUV level: ≥ 99.8% @ 248nm (internal)

Parameters/application: laser grade fused silica window, stainless steel concave tube (customizable length), baking temperature up to 200 ℃, high vacuum transmission range up to 248 nm, applicable to ultra-high vacuum