4VISA Catalogue 2021

Kodial Zero Length Viewports With ‘VAR’ Anti-Reflective Coatings
Specification
Seal Type
Maximum Temperature
Induction
350°C (KF versions 150°C)
Minimum Temperature minus 20°C
Maximum Rate of Temperature
Change
Leak Rate
Pressure range
Coating
3°C per minute
<1x10 -10 atm-cc/sec (He)
1 bar to 1x10 -11 mbar
2-layer 'VAR' coating optimised to customer specified
wavelength between 240nm and 1550nm
Part Number Flange Type Flange OD
(mm)
View Diameter
(mm)
Optic Thickness
(mm)
Flange Thickness
(mm)
Flange
Material
Weld Ring
Material
VPZ16VAR NW16CF 34 15 1 12.7 304L Kovar
VPZ16VAR-LN NW16CF 34 15 1 12.7 316LN Kovar
KVPZ16VAR KF16 25 15 1 12.7 316L Kovar
KVPZ25VAR KF25 40 20 1.5 18.5 316L Kovar
VPZ38VAR NW35CF 70 32 2.5 12.7 304L Kovar
VPZ38LAVAR NW35CF 70 38* 3 12.7 304L Kovar
VPZ38VAR-LN NW35CF 70 32 2.5 12.7 316LN Kovar
VPZ38LAVAR-LN NW35CF 70 38* 3 12.7 316LN Kovar
KVPZ40VAR KF40 55 38* 3 18.5 316L Kovar
KVPZ50VAR KF50 75 38* 3 15 316L Kovar
VPZ50VAR NW50CF 86 38* 3 16 304L Kovar
ISO63VPZVAR ISO63 95 38* 3 12 316L Kovar
VPZ64VAR NW63CF 114 63 3 17.4 304L Kovar
VPZ64LAVAR NW63CF 114 63 3.5 17.4 304L Kovar
VPZ64VAR-LN NW63CF 114 63 3 17.4 316LN Kovar
VPZ100VAR NW100CF 152 89 4 19.9 304L Kovar
VPZ100VAR-LN NW100CF 152 89 4 19.9 316LN Kovar
ISO100VPZVAR ISO100 130 63 3 12 316L Kovar
VPZ150VAR NW150CF 203 136 6.5 22.3 304L Kovar
VPZ150VAR-LN NW150CF 203 136 6.5 22.3 316LN Kovar
ISO160VPZVAR ISO160 180 89 4 12 316L Kovar
VPZ200VAR NW200CF 254 136 6.5 24.5 304L Kovar
* Note that the position of the optic in the VPZ38LAQ design results in the coating being effective over the central >30mm only
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