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UV Grade Brazed Fused Silica Zero Length Viewports

Seal Type: Braze
Maximum Temperature: 200 °C (KF & ISO versions 150 °C)
Minimum Temperature: minus 20 °C
Maximum Rate of Temperature Change: 3 °C per minute
Leak Rate: <1×10 -10 atm-cc/sec (He)
Pressure Range: 1 bar to 1×1011 mbar
Surface Quality: 20/10 scratch/dig
Parallelism: < 3 arc minutes
Flatness: See the table below
Laser Damage Threshold: CW Continuous Wave – 500 W/cm2 at 530 nm
Pulsed 2 J/cm2 at 530 nm and 10ns pulse width

(note, varies with wavelength, pulse width, laser type and cleanliness of optic)

 

​Our UV grade Fused Silica Zero Length Viewports are offered in CF, ISO and KF flange styles. The viewports comprise a high purity laser quality fused silica optic with precise flatness, parallelism, scratch and dig specifications. The ultra‑high vacuum (UHV) CF versions are offered using 304L or 316LN stainless steel and titanium grade 2 flanges. Non‑magnetic viewports are offered for low energy applications or surface science applications needing low magnetic fields. The non‑magnetic viewports use a non‑magnetic weld ring instead of the regular kovar weld ring. Flanges in 304L stainless steel are used for the high vacuum KF and ISO viewports. TSL viewports are manufactured in cleanroom conditions and helium leak tested, cleaned and packed to UHV standards. The construction of the fused silica viewports allows repeated bake‑out with UHV performance, whilst the window offers broadband optical transmission through deep UV, visible to near infra‑red.

UV Grade Fused Silica Zero Length Viewports are also available with various anti‑reflective coatings to match customer reflectance requirements are processed at TSL and available as options listed in the Anti‑Reflective Coatings page.
Laser viewports with a VAR, BBAR and AR coating optimised
for specific customer specified laser wavelength, reducing reflectance to below 0.5% per face, are also offered.
Non‑standard viewports can be manufactured on request, including entrant and re‑entrant style
microscope/camera viewports.
Annealed copper gaskets and other component accessories are also
supplied by TSL.

 

Fused Silica Transmission Curve

Compare the popular vacuum optics materials and their transmission

Downloadable PDF posters

Spectral ranges of popular vacuum optic materials poster

Fused Silica is not for you?

Please see our other viewports, such as Kodial, Sapphire,
Magnesium Fluoride (MgF2), Calcium Fluoride (CaF2), Barium Fluoride (BaF2),
CVD Diamond or Natural Z‑Cut Quartz and more.

CF Viewports

VPZ16

VPZ16LA

VPZ38

VPZ38LA

VPZ64

VPZ100

VPZ150

VPZ200

Part
Number
Flange
Type
Flange
OD
View
Diameter
Optic
Thickness
Flange
Material
Weld Ring
Material
Flatness @ 632.8nm (*)Max
Temp
Download
2D
Download
STEP File
VPZ16QNW16CF34 mm
1.33"
15 mm
0.60"
1.5 mm
0.06"
304LKovarλ/8200°CDrawing
Coming Soon
VPZ16Q
Coming Soon
VPZ16Q-LNNW16CF34 mm
1.33"
15 mm
0.60"
1.5 mm
0.06"
316LNKovarλ/8200°CDrawing
Coming Soon
VPZ16Q-LN
Coming Soon
VPZ16Q-NMNW16CF34 mm
1.33"
15 mm
0.60"
1.5 mm
0.06"
316LNNon-Magneticλ/8200°CDrawing
Coming Soon
VPZ16Q-NM
Coming Soon
VPZ16LAQNW16CF34 mm
1.33"
15.5 mm
0.62"
1.5 mm
0.06"
304LKovarλ/8200°CDrawing
Coming Soon
VPZ16LAQ
Coming Soon
VPZ16LAQ-LNNW16CF34 mm
1.33"
15.5 mm
0.62"
1.5 mm
0.06"
316LNKovarλ/8200°CDrawing
Coming Soon
VPZ16LAQ-LN
Coming Soon
VPZ38QNW35CF70 mm
2.75"
32 mm
1.26"
3 mm
0.12"
304LKovarλ/2200°CDrawing
Coming Soon
VPZ38Q
Coming Soon
VPZ38Q-LNNW35CF70 mm
2.75"
32 mm
1.26"
3 mm
0.12"
316LNKovarλ/2200°CDrawing
Coming Soon
VPZ38Q-LN
Coming Soon
VPZ38Q-NMNW35CF70 mm
2.75"
32 mm
1.26"
3 mm
0.12"
316LNNon-Magneticλ/2200°CDrawing
Coming Soon
VPZ38Q-NM
Coming Soon
VPZ38LAQNW35CF70 mm
2.75"
38 mm
1.50"
3.5 mm
0.14"
304LKovarλ/8200°CDrawing
Coming Soon
VPZ38LAQ
Coming Soon
VPZ38QLA-LNNW35CF70 mm
2.75"
38 mm
1.50"
3.5 mm
0.14"
316LNKovarλ/8200°CDrawing
Coming Soon
VPZ38QLA-LN
Coming Soon
VPZ64QNW63CF114 mm
4.5"
63 mm
2.49"
4.5 mm
0.18"
316LNNon-Magneticλ/2200°CDrawing
Coming Soon
VPZ64Q
Coming Soon
VPZ64Q-LNNW63CF114 mm
4.5"
63 mm
2.49"
4.5 mm
0.18"
304LKovarλ/2200°CDrawing
Coming Soon
VPZ64Q-LN
Coming Soon
VPZ64Q-NMNW63CF114 mm
4.5"
63 mm
2.49"
4.5 mm
0.18"
316LNKovarλ/2200°CDrawing
Coming Soon
VPZ64Q-NM
Coming Soon
VPZ100QNW100CF152 mm
6.0"
89 mm
3.51"
6 mm
0.24"
304LKovarλ/2200°CDrawing
Coming Soon
VPZ100Q
Coming Soon
VPZ100Q-LNNW100CF152 mm
6.0"
89 mm
3.51"
6 mm
0.24"
316LNKovarλ/2200°CDrawing
Coming Soon
VPZ100Q-LN
Coming Soon
VPZ100Q-NMNW100CF152 mm
6.0"
89 mm
3.51"
6 mm
0.24"
316LNNon-Magneticλ/2200°CDrawing
Coming Soon
VPZ100Q-NM
Coming Soon
VPZ150QNW150CF203 mm
8.0"
136 mm
5.36"
9.5 mm
0.38"
304LKovarλ/2200°CDrawing
Coming Soon
VPZ150Q
Coming Soon
VPZ150Q-LNNW150CF203 mm
8.0"
136 mm
5.36"
9.5 mm
0.38"
316LNKovarλ/2200°CDrawing
Coming Soon
VPZ150Q-LN
Coming Soon
VPZ150Q-NMNW150CF203 mm
8.0"
136 mm
5.36"
9.5 mm
0.38"
316LNNon-Magneticλ/2200°CDrawing
Coming Soon
VPZ150Q-NM
Coming Soon
VPZ200QNW200CF254 mm
10.0"
136 mm
5.36"
9.5 mm
0.38"
304LKovarλ/2200°CDrawing
Coming Soon
VPZ200Q
Coming Soon
VPZ200Q-183NW200CF254 mm
10.0"
183 mm
7.21"
10 mm
0.40"
304LKovarλ/2200°CDrawing
Coming Soon
VPZ200Q-183
Coming Soon
VPZ200Q-183-LNNW200CF254 mm
10.0"
183 mm
7.21"
10 mm
0.40"
316LNKovarλ/2200°CDrawing
Coming Soon
VPZ200Q-183-LN
Coming Soon

(*) – Note flatness of optic given before brazing.

KF Viewports

KVPZ16

KVPZ25-16LA

KVPZ25

KVPZ40-32

KVPZ40

KVPZ50

Part
Number
Flange
Type
Flange
OD
View
Diameter
Optic
Thickness
Flange
Material
Weld Ring
Material
Flatness @ 632.8nm (*)Max
Temp
Download
2D
Download
STEP File
KVPZ16QKF1630 mm
1.20"
15 mm
0.60"
1.5 mm
0.06"
304LKovarλ/8150°CDrawing
Coming Soon
KVPZ16Q
Coming Soon
KVPZ25Q-16LAKF2540 mm
1.60"
15.5 mm
0.62"
1.5 mm
0.06"
304LKovarλ/8150°CDrawing
Coming Soon
KVPZ25Q-16LA
Coming Soon
KVPZ40-32QKF4055 mm
2.20"
32 mm
1.26"
3 mm
0.12"
304LKovarλ/2150°CDrawing
Coming Soon
KVPZ40/32Q
Coming Soon
KVPZ40QKF4055 mm
2.20"
38 mm
1.50"
3.5 mm
0.14"
304LKovarλ/2150°CDrawing
Coming Soon
KVPZ40Q
Coming Soon
KVPZ50QKF5075 mm
3.00"
38 mm
1.50"
3.5 mm
0.14"
304LKovarλ/2150°CDrawing
Coming Soon
KVPZ50Q
Coming Soon

(*) – Note flatness of optic given before brazing.

ISO Viewports

ISO63VPZ

ISO100VPZ

ISO160VPZ

Part
Number
Flange
Type
Flange
OD
View
Diameter
Optic
Thickness
Flange
Material
Weld Ring
Material
Flatness @ 632.8nm (*)Max
Temp
Download
2D
Download
STEP File
ISO63QVPZISO6395 mm
3.80"
38 mm
1.50"
3.5 mm
0.14"
304LKovarλ/8150°CDrawing
Coming Soon
ISO63QVPZ
Coming Soon
ISO100QVPZISO100130 mm
5.20"
63 mm
2.49"
4.5 mm
0.18"
304LKovarλ/2150°CDrawing
Coming Soon
ISO100QVPZ
Coming Soon
ISO160QVPZISO160180 mm
7.10"
89 mm
3.51"
6 mm
0.24"
304LKovarλ/2150°CDrawing
Coming Soon
ISO160QVPZ
Coming Soon

(*) – Note flatness of optic given before brazing.

Viewport
Safety
Covers

Anti‑Reflective
Coatings

Viewport
Installation
Kits

Copper
Gaskets

 

 

Product Enquiries


Torr Standard Enquiries Form

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