CF Flanged Zero Length Sapphire Viewports

Lesker - CF Flanged Zero Length Sapphire Viewports

CF Flanged Optical Glass Viewports Features:

• Built from the highest-quality materials to UHV standards
• Compatible with vacuum systems capable of reaching UHV levels
• Viewports should be sealed with fully annealed copper gaskets to reduce induced strain
• If the process deposits material, Kurt J. Lesker / Premier Solutions strongly recommend a viewport shutter because deposits can damage and impair the optical properties of the lens.

UV Sapphire Features:

• Leak Rate <2x10^-10 atm cc/sec He
• Parallelism <3 Arc Minutes
• 304L Stainless Steel Flange
• Temperature Range -100°C to 450°C
• Surface Finish 50/20
• UV Transmission 50% @ 250nm (external)
• Orientation 0-90 Degrees

DUV Sapphire Features:

• Leak Rate <2x10^-10 atm cc/sec He
• Parallelism <3 Arc Minutes
• 304L Stainless Steel Flange
• Temperature Range -100°C to 450°C
• Surface Finish 20/10
• UV Transmission 70% @ 250nm (external)
• Orientation 0 Degrees

CAUTION: Although sapphire has a reasonable thermal conductivity, for safety, Kurt J. Lesker / Premier Solutions strongly recommend that no viewport is exposed to a temperature ramp of greater than 2-3°C per minute, and that no viewport be exposed to direct thermal radiation. To limit thermal gradients when heating viewports, we recommend the viewing area and the flange be covered with many layers of aluminum foil to act as a reflective shield.

Dimensional Drawings

Charts

Premier Solutions Pte Ltd / Lesker CF Flanged Zero Length Sapphire Viewports