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 ".
Del Mar Photonics - Newsletter
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.
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.
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
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 |
 |
| W-CaF-40-7 | CaF2 window, ø 40 mm x 7.0 mm | $450.00 |
|
| W-CF-50.8-3 | CaF2 window, ø 50.8 mm x 3.0 mm | $190.00 |
|
| DSP-CF-15 | Dispersion prism, IR grade CaF2, 15x15x15x10 mm | $150.00 |
|
| 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 |
|
| W-Ge-25.4-3 | Ge window, ø 25.4 mm x 3 mm | $110.00 |
|
| W-Ge-38.1-4 | Ge window, ø 38.1 mm x 4 mm | $250.00 |
|
| more |
| ZnSe | |
| Model | Product Name+ | Price | Buy Now |
| PH-ZnSe-25.4-12.7 | ZnSe hemicylindrical prism, 25.4 mm | $1,350.00 |
|
| W-ZnSe-60-3-K | ZnSe window, ø60 mm, tckn. 3 mm, coated | $620.00 |
|
| W-ZnSe-12.7-1 | ZnSe window, ø12.7 mm, thickn. 1 mm | $90.00 |
|
| W-ZnSe-25.4-3 | ZnSe window, ø25.4 mm, thickn. 3 mm | $110.00 |
|
| W-ZnSe-76.2-3-K | ZnSe window, ø76.2 mm, tckn. 3 mm, coated | $700.00 |
|
| 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 |
|
| WG-BF-25.4-10-2.1 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm | $129.00 |
|
| WG-BF-25.4-10-2.5 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm | $129.00 |
|
| W-BF-12.7-2 | BaF2 window, ø 12.7 mm x 2.0 mm | $62.00 |
|
| W-BF-4-0.5 | BaF2 window, ø 4" x 0.5", polished, uncoated | $1,200.00 |
|
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
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
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 |
|
| W-CaF-40-7 | CaF2 window, ø 40 mm x 7.0 mm | $450.00 |
|
| W-CF-50.8-3 | CaF2 window, ø 50.8 mm x 3.0 mm | $190.00 |
|
| DSP-CF-15 | Dispersion prism, IR grade CaF2, 15x15x15x10 mm | $150.00 |
|
| 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 |
|
| W-Ge-25.4-3 | Ge window, ø 25.4 mm x 3 mm | $110.00 |
|
| W-Ge-38.1-4 | Ge window, ø 38.1 mm x 4 mm | $250.00 |
|
| more |
| ZnSe |
| Model | Product Name+ | Price | Buy Now |
| PH-ZnSe-25.4-12.7 | ZnSe hemicylindrical prism, 25.4 mm | $1,350.00 |
|
| W-ZnSe-20-3 | ZnSe window, ø 20, thickness 3 mm | $150.00 |
|
| W-ZnSe-60-3-K | ZnSe window, ø60 mm, tckn. 3 mm, coated | $620.00 |
|
| W-ZnSe-12.7-1 | ZnSe window, ø12.7 mm, thickn. 1 mm | $90.00 |
|
| W-ZnSe-25.4-3 | ZnSe window, ø25.4 mm, thickn. 3 mm | $110.00 |
|
| W-ZnSe-76.2-3-K | ZnSe window, ø76.2 mm, tckn. 3 mm, coated | $700.00 |
|
| 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 |
|
| WG-BF-25.4-10-2.1 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm | $129.00 |
|
| WG-BF-25.4-10-2.5 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm | $129.00 |
|
| W-BF-12.7-2 | BaF2 window, ø 12.7 mm x 2.0 mm | $62.00 |
|
| W-BF-4-0.5 | BaF2 window, ø 4" x 0.5", polished, uncoated | $1,200.00 |
|
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
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
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. ...
CO2 Laser Windows - Zinc Selenide( ZnSe) is used for optical windows, lenses,
mirrors and prisms particularly for infrared applications.
ZnS, ZnSe, and ZnS/ZnSe windows for FLIR system
CVD-formed ZnSe windows
adsabs.harvard.edu/abs/1986OptEn..25..519K - Similar pages
ZnSe Windows for FT-IR
Replacement Pair of ZnSe Windows for FTIR Liquid Autosampler.
ZnSe Windows and Lens for CO2 laser
High precision IR optics ZnSe windows and lens for CO2 laser
Zinc Selenide Optical Components
Very wide transmission range covering 0.6 to 20 µm
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 |
|
| W-CaF-40-7 | CaF2 window, ø 40 mm x 7.0 mm | $450.00 |
|
| W-CF-50.8-3 | CaF2 window, ø 50.8 mm x 3.0 mm | $190.00 |
|
| DSP-CF-15 | Dispersion prism, IR grade CaF2, 15x15x15x10 mm | $150.00 |
|
| 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 |
|
| W-Ge-25.4-3 | Ge window, ø 25.4 mm x 3 mm | $110.00 |
|
| W-Ge-38.1-4 | Ge window, ø 38.1 mm x 4 mm | $250.00 |
|
| more |
| ZnSe |
| Model | Product Name+ | Price | Buy Now |
| PH-ZnSe-25.4-12.7 | ZnSe hemicylindrical prism, 25.4 mm | $1,350.00 |
|
| W-ZnSe-20-3 | ZnSe window, ø 20, thickness 3 mm | $150.00 |
|
| W-ZnSe-12.7-1 | ZnSe window, ø 12.7 mm, thickness 1 mm | $90.00 |
|
| W-ZnSe-25.4-3 | ZnSe window, ø 25.4 mm, thickness 3 mm | $190.00 |
|
| W-ZnSe-60-3-K | ZnSe window, ø 60 mm, thickness 3 mm, coated | $620.00 |
|
| W-ZnSe-76.2-3-K | ZnSe window, ø 76.2 mm, thickness 3 mm, coated | $700.00 |
|
| 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 |
|
| WG-BF-25.4-10-2.1 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.1 mm | $129.00 |
|
| WG-BF-25.4-10-2.5 | BaF2 wedge, 25.4 mm x 10.0 mm x 2.5 mm | $129.00 |
|
| W-BF-12.7-2 | BaF2 window, ø 12.7 mm x 2.0 mm | $62.00 |
|
| W-BF-4-0.5 | BaF2 window, ø 4" x 0.5", polished, uncoated | $1,200.00 |
|
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 2.5µm, 3 to 5µm, 1 to 5µm, 8 to 12µm, and the 3 to 12µm spectral regions and single wavelength AR coating at 10.6µm RЈ 0.5% per surface. Many other specialized wavelength bands are possible within the 0.6 to 16µm 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, µm |
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.