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Zero-Length Sapphire Viewports

Larson Electronic Glass zero length sapphire windows allow the window to be mounted as close to the chamber as reasonably possible and allow the clearest access from the window surface on the air side. These zero length windows are silver-brazed to Kovar® sleeves. They are mounted in stainless steel tube-weld adapters and CF type flanges for use below 1x10-11, or ISO type Kwik-Flange®. Optional flange weldments are available as special order.

Sapphire Window surfaces which are extremely hard and scratch resistant offer a minimum of distortion and provide maximum light transmission suitable for most applications. UV grade viewports have a 90° crystal orientation normal to the optical axis.

Features:

  • Zero-Length offers greater distortion-free view area
  • ¾” and 1” are UV grade.
  • Zero-Length magnetic Kovar® content only 1% to 3%
  • >80% Transmission from 250nm (UV Grade) to 4000nm
  • CF and Weld mount bakeable to 450°C, 25°C/Min gradient
  • Kwik-Flange® bakeable to 200°C

Larson Electronic Glass offers "Zero-Length Sapphire Viewports" available in 4 standard sizes from 3/4 inch through 2 inch with a variety of flange options. Dimensions are in inches unless otherwise noted.

 
 
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Image
Name
Model
Flange
View diameter (V)
Metal end
Height (H)
Glass thickness (T)


3/4" Zero-Length Sapphire Viewport  3/4" Zero-Length Sapphire Viewport  VSZ-075-T  -
.69
1-1/2" Weld Adaptor
.44"
.080"


3/4" Zero-Length Sapphire Viewport  3/4" Zero-Length Sapphire Viewport  VSZ-075-F2  2.75" CF
.69
-
.50"
.080"


3/4" Zero-Length Sapphire Viewport  3/4" Zero-Length Sapphire Viewport  VSZ-075-K4  NW40
.69
-
.56"
.080"


1" Zero-Length Sapphire Viewport  1" Zero-Length Sapphire Viewport  VSZ-100-T  -
.94"
1-1/2" Weld Adaptor
.44"
.080"


1" Zero-Length Sapphire Viewport  1" Zero-Length Sapphire Viewport  VSZ-100-F2  2.75" CF
.94"
-
.50"
.080"


1" Zero-Length Sapphire Viewport  1" Zero-Length Sapphire Viewport  VSZ-100-K4  NW40
.94"
-
.52"
.080"


1" Zero-Length Sapphire Viewport  1" Zero-Length Sapphire Viewport  VSZ-100-K5  NW50
.94"
-
.52"
.080"


1-1/2" Zero-Length Sapphire Viewport  1-1/2" Zero-Length Sapphire Viewport  VSZ-150-T  -
1.44"
2-1/2" Weld Adaptor
.49"
.080"


1-1/2" Zero-Length Sapphire Viewport  1-1/2" Zero-Length Sapphire Viewport  VSZ-150-F2  2.75" CF
1.44"
-
.50"
.080"


1-1/2" Zero-Length Sapphire Viewport  1-1/2" Zero-Length Sapphire Viewport  VSZ-150-F4  4.5" CF
1.44"
-
.68"
.080"


2" Zero-Length Sapphire Viewport  2" Zero-Length Sapphire Viewport  VSZ-200-T  -
1.94"
2-1/2" Weld Adaptor
.54"
.094"


2" Zero-Length Sapphire Viewport  2" Zero-Length Sapphire Viewport  VSZ-200-F4  4.5" CF
1.94"
-
.68"
.094"


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