Del Mar Photonics

ZnSe Vacuum viewport

Del Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance.
When you send us your inquiry please fill out the following form to indicate all important specifications and e-mail it to us with your inquiry.

Del Mar Photonics viewports are manufactured using advanced techniques for control of special and critical processes, including 100 percent helium leak testing and x-ray measurements for metallization control.

Sample specifications

ZnSe_UHV_viewport_CF35_AR_2_5
CF35 UHV View-port
Type of viewport: Zero Length
Transmission wavelengths range (Visible and Infrared): 0.4 micron to 5.0 micron
Anti Reflection Coating for the Infrared Wavelength Range (both side of the window material): 2.0 micron to 5.0 micron
Type of anti reflection coating: BBAR (Broad Band Anti Reflection) coating
Transmittance: ≥ 90% FOR 2.0 to 5.0 micron wavelength range.
Standard Flange Dimension CF35 (Conflat Flange)
Clear Viewing Diameter/Transmission
Aperture: ≥ 32 mm
Window material: ZnSe
Compatible to Vacuum Range (UHV):10^(-8) Torr
Baking Temperature: ≥ 100C
Vacuum Seal Type:Vacuum seal type must be compatible to above temperature range and
Pressure range (Mechanical/Brazed/Bonding etc.)
Window material mounted on (CF-Flange material): Stainless Steel-304L (Non magnetic) or SS-316L (Non magnetic).
Part number:
ZnSe_UHV_viewport_CF35_AR_2_5 - request a quote
 


 



Windows Materials include:
Fused silica, Quartz , Sapphire , MgF2, BaF2, CaF2, ZnSe, ZnS, Ge, Si, Pyrex



Coating - a range of custom coatings can applied - which include
- Single QWOT
- Broad Band AR
- V coatings
- ITO
- DLC (Diamond like coating)

Standard Viewing diameters from .55" to 1.94 ".

Typical specifications

CF Flange:
Material : stainless steel 304,
CF16 O.D: 1.33 " (34mm)
View diameter: 10 mm
Bake out temp: 200 Celsius degree
Leak rate <1x10-10 mbar
withstand 400-450 psi
Seal: copper gasket

ZnSe window
Material: laser grade ZnSe crystal
Thickness: 10 mm, uncoated
Surface quality 60-40
 

Custom vacuum viewport are available upon request.

BaF2 viewport - request a quote

ZnSe Vacuum viewport - request a quote

Germanium viewport - request a quote

Del Mar Photonics offer a range of competitively priced UHV viewports , Conflat, ISO or KF including a variety of coatings to enhance performance.
When you send us your inquiry please fill out the following form to indicate all important specifications and e-mail it to us with your inquiry.

Del Mar Photonics

CaF2 window, ø 25.4 mm x 3.0 mm

CaF2 optical grade
Type: circular plane window
Diameter: 25.4 mm (+0.0/-0.2 mm)
Thickness: 3 mm (+/-0.1 mm)
Surface quality: 40/20 scr/dig
Parallelism: 3 arc minutes
Clear aperture: 90% of diameter

buy online

Del Mar Photonics supplies infrared optics from other materials including ZnSe, Germanium, Barium Fluoride, Calcium Fluoride IR grade and many others. E-mail us for custom quote or check our online store for items available in stock.

 

CaF2
 
 

 Model   Product Name+   Price   Buy Now 
 W-CF-25.4-3   CaF2 window, ø 25.4 mm x 3.0 mm  $149.00  Buy Now 
 W-CaF-40-7   CaF2 window, ø 40 mm x 7.0 mm   $450.00  Buy Now 
 W-CF-50.8-3   CaF2 window, ø 50.8 mm x 3.0 mm   $190.00  Buy Now 
 DSP-CF-15   Dispersion prism, IR grade CaF2, 15x15x15x10 mm   $150.00  Buy Now 
 more

 

Ge optics
 
 

 Model   Product Name+   Price   Buy Now 
 E-Ge-12.7-25.4   Ge etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")   $790.00  Buy Now 
 W-Ge-25.4-3   Ge window, ø 25.4 mm x 3 mm   $110.00  Buy Now 
 W-Ge-38.1-4   Ge window, ø 38.1 mm x 4 mm   $250.00  Buy Now 
 more

 

ZnSe
 
 

 Model   Product Name+   Price   Buy Now 
 PH-ZnSe-25.4-12.7   ZnSe hemicylindrical prism, 25.4 mm   $1,350.00  Buy Now 
 W-ZnSe-60-3-K   ZnSe window, ø60 mm, tckn. 3 mm, coated   $620.00  Buy Now 
 W-ZnSe-12.7-1   ZnSe window, ø12.7 mm, thickn. 1 mm   $90.00  Buy Now 
 W-ZnSe-25.4-3   ZnSe window, ø25.4 mm, thickn. 3 mm   $110.00  Buy Now 
 W-ZnSe-76.2-3-K   ZnSe window, ø76.2 mm, tckn. 3 mm, coated   $700.00  Buy Now 
 more

 

BaF2 - Barium Fluoride
 
 

 Model   Product Name+   Price   Buy Now 
 WG-BF-25.4-10-1.55   BaF2 wedge, 25.4 mm x 10.0 mm x 1.55 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.1   BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.5   BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm   $129.00  Buy Now 
 W-BF-12.7-2   BaF2 window, ø 12.7 mm x 2.0 mm   $62.00  Buy Now 
 W-BF-4-0.5   BaF2 window, ø 4" x 0.5", polished, uncoated   $1,200.00  Buy Now 

ZnSe rhomb request a quote

ZnSe half-wave rhomb
Type: half-wave rhomb
Material: ZnSe optical grade
Dimensions of working faces (input and
output): 25.4 x 25.4 mm (+0.0/-0.2 mm)
and two faces: 25.4 x 30.9 mm (+0.0/-0.2
mm)
Height: 25.4 mm (+0.0/-0.2 mm)
Angles: 32.5 deg and 147.5 deg
Angular deviation: +/-20 arc minutes
4 faces polished: SQ 60-40 scr-dig
Other 4 faces: fine ground
Coating: none
Working range of wavelength: 2-10 microns
Part number: ZnSe_rhomb_25.4_47.6 - buy online

 

Del Mar Photonics

ZnSe window, ø 25.4 mm x 3.0 mm

ZnSe optical grade
Type: circular plane window
Diameter: 25.4 mm (+0.0/-0.2 mm)
Thickness: 3 mm (+/-0.2 mm)
Surface quality: 60/40 scr/dig
Parallelism: 3 arc minutes
Clear aperture: 90% of diameter

buy online

Del Mar Photonics supply infrared optics from other materials including ZnSe, Germanium, Barium Fluoride, Calcium Fluoride IR grade and many others. E-mail us for custom quote or check our online store for items available in stock.

 

CaF2
 
 

 Model   Product Name+   Price   Buy Now 
 W-CF-25.4-3   CaF2 window, ø 25.4 mm x 3.0 mm  $149.00  Buy Now 
 W-CaF-40-7   CaF2 window, ø 40 mm x 7.0 mm   $450.00  Buy Now 
 W-CF-50.8-3   CaF2 window, ø 50.8 mm x 3.0 mm   $190.00  Buy Now 
 DSP-CF-15   Dispersion prism, IR grade CaF2, 15x15x15x10 mm   $150.00  Buy Now 
 more

 

Ge optics
 
 

 Model   Product Name+   Price   Buy Now 
 E-Ge-12.7-25.4   Ge etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")   $790.00  Buy Now 
 W-Ge-25.4-3   Ge window, ø 25.4 mm x 3 mm   $110.00  Buy Now 
 W-Ge-38.1-4   Ge window, ø 38.1 mm x 4 mm   $250.00  Buy Now 
 more

 

ZnSe

 Model   Product Name+   Price   Buy Now 
 PH-ZnSe-25.4-12.7   ZnSe hemicylindrical prism, 25.4 mm   $1,350.00  Buy Now 
 W-ZnSe-20-3  ZnSe window, ø 20, thickness 3 mm   $150.00 Buy Now 
 W-ZnSe-60-3-K   ZnSe window, ø60 mm, tckn. 3 mm, coated   $620.00  Buy Now 
 W-ZnSe-12.7-1   ZnSe window, ø12.7 mm, thickn. 1 mm   $90.00  Buy Now 
 W-ZnSe-25.4-3   ZnSe window, ø25.4 mm, thickn. 3 mm   $110.00  Buy Now 
 W-ZnSe-76.2-3-K   ZnSe window, ø76.2 mm, tckn. 3 mm, coated   $700.00  Buy Now 
 more

 

 
BaF2 - Barium Fluoride

 

 Model   Product Name+   Price   Buy Now 
 WG-BF-25.4-10-1.55   BaF2 wedge, 25.4 mm x 10.0 mm x 1.55 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.1   BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.5   BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm   $129.00  Buy Now 
 W-BF-12.7-2   BaF2 window, ø 12.7 mm x 2.0 mm   $62.00  Buy Now 
 W-BF-4-0.5   BaF2 window, ø 4" x 0.5", polished, uncoated   $1,200.00  Buy Now 

Del Mar Photonics

ZnSe window, ø 3.5 inch x 0.25 inch

Material: ZnSe optical grade
Diameter: 3.5 inch (+0.0/-0.004 inch)
Thickness: 0.250 inch (+/-0.004 inch)
Surface quality: 60/40 scr/dig
Parallelism: <= 5 arc minutes
Clear aperture: >= 90% of diameter
Coating: AR/AR at 10.6 microns

buy online or request a quote

Del Mar Photonics

ZnSe window, ø 25.4 mm x 3.0 mm

ZnSe optical grade
Type: circular plane window
Diameter: 25.4 mm (+0.0/-0.2 mm)
Thickness: 3 mm (+/-0.2 mm)
Surface quality: 60/40 scr/dig
Parallelism: 3 arc minutes
Clear aperture: 90% of diameter

buy online

Del Mar Photonics supply infrared optics from other materials including ZnSe, Germanium, Barium Fluoride, Calcium Fluoride IR grade and many others. E-mail us for custom quote or check our online store for items available in stock.

New: ZnSe rhomb


 

ZnSe windows updates
ZnSe Windows for Infrared Laser. Windows for infrared light, allowing transmission of light at wavelengths from 600 nm up to around 20 μm. ...
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adsabs.harvard.edu/abs/1986OptEn..25..519K - Similar pages
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Very wide transmission range covering 0.6 to 20 m CVD grown ZnSe high optical quality material
Lasergrade ZnSe material.
Zinc Selenide (ZnSe) Windows/Lenses. Zinc based materials provide excellent IR transmission as well as some transmission in the visible.
Antireflective Coatings for GaAs and ZnSe Windows and Lenses
ZnSe Windows for Infrared Laser
In contrast to other optical materials for infrared light such as Ge (germanium), or Si (silicon), ZnSe windows allow transmission of some visible light.
Windows for applications in mid-infrared (MIR) solid-state ...
ZnSe windows for very different IR optics applications such as night vision systems, thermal imaging devices etc.
Optical Coatings for High Energy ZnSe Laser Windows
Znse Windows For Tg/Ir Gas Cell

ZnSe CVD laser grade windows, lens, beam splitters, filters etc. for lasers, FTIR and scientific research.
Laser Beam Delivery Components ...
ZnSe windows are used as end elements or protective windows. Similar to cutting lenses, they are made exclusively with high quality "laser grade" material.
ZnSe windows to be used with the FEANICS (Flow Enclosure Accommodating Novel Investigations in Combustion of Solids) ...
ZnSe Cylindrical lens

CaF2
 
 

 Model   Product Name+   Price   Buy Now 
 W-CF-25.4-3   CaF2 window, ø 25.4 mm x 3.0 mm  $149.00  Buy Now 
 W-CaF-40-7   CaF2 window, ø 40 mm x 7.0 mm   $450.00  Buy Now 
 W-CF-50.8-3   CaF2 window, ø 50.8 mm x 3.0 mm   $190.00  Buy Now 
 DSP-CF-15   Dispersion prism, IR grade CaF2, 15x15x15x10 mm   $150.00  Buy Now 
 more

 

Ge optics
 
 

 Model   Product Name+   Price   Buy Now 
 E-Ge-12.7-25.4   Ge etalon, ø 12.7 mm x 25.4 mm (ø 0.5" x 1")   $790.00  Buy Now 
 W-Ge-25.4-3   Ge window, ø 25.4 mm x 3 mm   $110.00  Buy Now 
 W-Ge-38.1-4   Ge window, ø 38.1 mm x 4 mm   $250.00  Buy Now 
 more

 

ZnSe

 Model   Product Name+   Price   Buy Now 
 PH-ZnSe-25.4-12.7   ZnSe hemicylindrical prism, 25.4 mm   $1,350.00  Buy Now 
 W-ZnSe-20-3   ZnSe window, ø 20, thickness 3 mm   $150.00  Buy Now 
 W-ZnSe-12.7-1   ZnSe window, ø 12.7 mm, thickness 1 mm   $90.00  Buy Now 
 W-ZnSe-25.4-3   ZnSe window, ø 25.4 mm, thickness 3 mm   $190.00  Buy Now 
 W-ZnSe-60-3-K   ZnSe window, ø 60 mm, thickness 3 mm, coated   $620.00  Buy Now 
 W-ZnSe-76.2-3-K   ZnSe window, ø 76.2 mm, thickness 3 mm, coated   $700.00  Buy Now 
More

 

 
BaF2 - Barium Fluoride

 

 Model   Product Name+   Price   Buy Now 
 WG-BF-25.4-10-1.55   BaF2 wedge, 25.4 mm x 10.0 mm x 1.55 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.1   BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm   $129.00  Buy Now 
 WG-BF-25.4-10-2.5   BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm   $129.00  Buy Now 
 W-BF-12.7-2   BaF2 window, ø 12.7 mm x 2.0 mm   $62.00  Buy Now 
 W-BF-4-0.5   BaF2 window, ø 4" x 0.5", polished, uncoated   $1,200.00  Buy Now 

 

Zinc Selenide (ZnSe) Components

Zinc Selenide (ZnSe) is the most popular material for infrared application. Due to very wide transmission range covering 0.6 to 20 m m CVD grown ZnSe high optical quality material is used to manufacture optical components (windows, mirrors, lenses etc.) for high power IR lasers.

Physical Properties

Crystal type cubic
Lattice constant       a=5.657Е
Density 5.27 g/cm3 at 25 C
Melting point 1525 C
Refractive index 2.417 - 2.385 @ 8 - 13 m m
2.40272 at 10.6 m m
Transmission band 0.6 to 20 m m
Bulk absorption coefficient 5 ґ 10-4 cm-1 @ 10.6 m m
Young's Modulus 6.72 ґ 109 dynes/mm2
Specific Heat at 25 C 0.085 ca/g C
Linear thermal expansion 7.57 ґ 10-6 / C at 20 C

General Specifications of Zinc Selenide Optical Components

Material ZnSe
Surface Quality 40-20 scratch & dig
Clear aperture 90% of diameter
Diameter tolerance +0.0, -0.1 mm
Thickness tolerance +0.1, -0.25 mm
Surface Irregularity l /2 per inch @ 633 nm over clear aperture
Coatings Typical available coatings for ZnSe include BBAR for 0.8 to 2.5m, 3 to 5m, 1 to 5m, 8 to 12m, and the 3 to 12m spectral regions and single wavelength AR coating  at 10.6m RЈ 0.5% per surface. Many other specialized wavelength bands are possible within the 0.6 to 16m range.

 

Standard ZnSe windows (uncoated) 

Diameter, mm

Thickness, mm

Cat.-No

12.5 (or 0.5")

2.0

40701

25.0 (or 1")

3.0

40703

40.0 (or 1.5")

4.0

40705

50.0 (or 2")

5.0

40707

 

Zinc Selenide custom made windows, lenses, Brewster windows, mirrors, beamsplitters and other components are available on request.

Zinc selenide most obvious and important advantage over other materials is its low absorption in the red end of the visible spectrum. This allows the ubiquitous helium neon laser to be used as a convenient and inexpensive alignment or sighting tool for infrared laser beams. Prealignment of optics may be necessary merely because the infrared beam is invisible to the eye, or in addition because the infrared laser beam is of such a high energy misdirected laser beam can be extremely dangerous to equipment or personnel.

Although zinc selenide has this clear advantage over silicon and germanium, unfortunately it is not an easy material from which to produce optics. Firstly, it is not a naturally occurring material and has to be synthesized using a difficult process (CVD). Secondly, the dust, which is generated when zinc selenide is ground and polished constitutes a significant health hazard as a cumulative toxin. Also, it is not a particularly hard substance and scratches easily.

Refractive Index

Wavelength, m

2.75

5.00

7.50

9.50

11.0

12.5

13.5

15.0

16.0

16.9

17.8

18.6

19.3

20.0

Refractive Index

2.44

2.43

2.42

2.41

2.40

2.39

2.38

2.37

2.36

2.35

2.34

2.33

2.32

2.31

 

Transmission

Although the internal transmittance of zinc selenide is very high (absorption <= 0.0005cm-1 at 10.6mm), the relatively high refractive index (2.4 at 10.6m m) cause reflection losses of nearly 30%. Unless such losses can be tolerated, zinc selenide optics should always be antireflection coated. Because of the high refractive index, single and double layer antireflection coatings can be very effective.

Zinc selenide is not hygroscopic unlike certain salts which are used for windows in the infrared.