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Flanges & Components > Viewports & Shutters > ConFlat (CF) Flanged Viewports

CF Flanged Differentially-Pumped Cleartran™ 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
  • If the process deposits material, we strongly recommend a viewport shutter because deposits can damage and impair the optical properties of the lens.

Zinc Sulfide (Cleartran™) Features:

  • Leak Rate <2x10-10 atm cc/sec He
  • Parallelism <3 Arc Minutes
  • 304L Stainless Steel Flange
  • Flatness λ/4
  • Bakeout Temperature to 200°C
  • Surface Finish 40/20
  • AR Coated (8-12 Microns)

CAUTION: safety, we 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.

Viewport Cleaning Procedure Guide For a guide on Viewport Cleaning Procedures, please click here.


Dimensional Drawings

Charts

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Ordering Table

(Click column headers to sort data)

Flange
Size/OD
Glass
Type
Dim
A
Dim
B
Dim
C
Fitting View
Area
PartNo Price Add Item
VacuCADSM
Flange
Size/OD
Glass
Type
Dim
A
Dim
B
Dim
C
Fitting View
Area
PartNo Price Add Item
VacuCADSM
2-3/4" Zinc Sulfide (Cleartran™) 0.94 1.8 0.77 1/8" OD Tube 0.93
VPDP-275
$2,195.00
N/A
2-3/4" Zinc Sulfide (Cleartran™) 0.94 1.8 0.77 1/8" FVCR 0.93
VPDP-275FV2
$2,195.00
N/A
2-3/4" Zinc Sulfide (Cleartran™) 0.94 1.8 0.77 1/8" MVCR 0.93
VPDP-275MV2
$2,195.00
N/A
4-1/2" Zinc Sulfide (Cleartran™) 1.7 2.9 0.87 1/4" OD Tube 1.88
VPDP-450
$2,810.00
N/A
4-1/2" Zinc Sulfide (Cleartran™) 1.7 2.9 0.87 1/4" FVCR 1.88
VPDP-450FV4
$2,810.00
N/A
4-1/2" Zinc Sulfide (Cleartran™) 1.7 2.9 0.87 1/4" MVCR 1.88
VPDP-450MV4
$2,810.00
N/A
Flange Selection Guide
With a variety of flanges to choose from, the Flange Selection Guide is designed to help you find one to meet your vacuum requirements. Shop Now!
Can't find the flange you need or want a custom configuration? Please call us at 1-412-387-9200 or email international@lesker.com with your inquiry.

ISO:9001 The Kurt J. Lesker Company is an ISO:9001 certified company. Copyright ©1996-2017 Kurt J. Lesker Company® All rights reserved.