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UHV Viewports using Fused Silica, Sapphire, Zinc Selenide and numerous other optics

MPF Products, Inc. specializes in designing and manufacturing UHV Viewports for scientific & harsh environment applications that require excellent atomic level hermeticity. MPF designs use UV and EUV grade Sapphire and Fused Silica to various metals.

MPF has over 175 standard designs on our website, while our engineering team has produced hundreds of specialty viewport designs over the last twenty years. Our extensive inventory levels of titanium and 316LN materials can easily translate into truly non-magnetic windows for your demanding environment.

Our Anti-Reflective (AR) and Indium-Tin-Oxide (ITO) Coated viewports have shipped globally for use in Laser Applications including KrF, XeCl, ND-YAG and Helium Neon lasers. We have also partnered with our customers to construct viewports for Differentially Pumped, Wedged, Brewster Angled, Large Viewing, Re-Entrant, Water-Cooled, Over Pressure and NIR/IR applications.

MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures. View our Main Transmission Charts.

Coatings and Applications (37)

We offer a large selection of coatings and applications for our UHV viewports. Our methods include Evaporation, E-Beam, Ion Assist, and High Energy Plasma. Anti-Reflective, Indium Tin Oxide (ITO), Broadband (BBAR), V-Coat, Dual AR, Multi-Band AR, and Reflective Coatings can all be processed on any of the viewport offerings. Please call or e-mail us to discuss your specific application with one of our sales representatives. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Standard/Stocked AR Coating Options for Viewports
Calcium Fluoride (CaF2) (8)

Calcium Fluoride (CaF2) is used optically as windows, prisms and lenses transmitting from the vacuum ultraviolet (VUV) into the infrared. It is a physically and chemically stable optical material with good water and chemical resistance. Two qualities are manufactured, one for Visible and Infrared applications and the other specifically for Ultraviolet applications. For Ultraviolet applications, these are grown from chemically pure powder. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - Calcium Fluoride (CaF2) Transmission Chart
Crystal Quartz (SiO2) (4)

Crystal Quartz (SiO2) is typically used as an optical window in the 3-5 micron region but can also be used as an optical filter. Crystal Quartz (SiO2) has a low density and a high thermal conductivity, making it an ideal material to be used for laser mirrors. Silicon is grown by two different forms. One, is Czochralski (CZ), which contains some oxygen typically leading to an absorption band. The other is Optical Quality Silicon. This form is typically doped, and because it has a high refractive index, it must be anti-reflective coated to achieve a high optical transmission. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates, or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - Crystal Quartz (SiO2) Transmission Chart
Magnesium Fluoride (MgF2) (7)

Magnesium Fluoride (MgF2) is grown by vacuum Stockbarger technique in various diameters. Magnesium Fluoride is a strong material and polishes very well. Magnesium Fluoride is slightly birefringent and is normally supplied with the optical axis cut perpendicular to the window face. Magnesium Fluoride is a water soluble material. Magnesium Fluoride transmits well into the VUV region and is an excellent choice for Excimer laser applications. Magnesium Fluoride is one of two materials that will transmit in the VUV 121nm (Lyman Alpha) range. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - Magnesium Fluoride (MgF2) Transmission Chart
Non-Magnetic (36)

MPF Products Inc. offers a large variety of non-magnetic viewports. We categorized these viewports based on their magnetic permeability. From 316LN to Titanium, MPF Products Inc. has what you need for your next application. Additionally, MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. Due to this, you may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute
Over Pressure Sapphire Viewports (3)

Over-Pressure Sapphire Viewports are intended for a vacuum system where there is not a burst disc or other device in place to withstand a sudden pressure increase. It is the customer’s responsibility to ensure the vacuum system cannot be pressured beyond the 200 psi rating that MPF’s Over-Pressure Viewports are designed to withstand. MPF Products Inc. has designed, tested and successfully built numerous Pressure Viewports that are able to withstand 20,000 psi. Please contact a sales representative for more information. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute
Re-Entrant (7)

MPF Products Inc. produces UHV Re-Entrant Viewports. These specific viewports are perfect for allowing you to introduce cameras or other customer specific tools into the vacuum chamber. MPF can customize our UHV Re-Entrant Viewports to be customer specific in regards to length, size, window material, mounting material and specified coatings wavelengths when needed. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute
RF Viewports (3)

RF Viewports transmit RF or microwave power from a vacuum into an air filled or inert gas filled transmission line. An example of this would be a waveguide. It is a resonant cavity designed to maximize RF (radio frequency) power transmission, with minimal loss over a desired frequency range. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute
Sapphire (33)

The properties of Sapphire makes this material ideal for use in harsh environments. It has a unique combination of excellent physical, chemical and optical properties that allow it to retain its composition at elevated temperatures. This material will resist attack from acids and alkali up to 1000°C as well as Hydrofluoric Acid below 300°C. This material is inherently birefringent and has a transmission range from UV to NIR. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - UV Sapphire Transmission Chart - DUV Sapphire Transmission Chart
Zinc Selenide (ZnSe) (12)

Zinc Selenide (ZnSe) is used for Infrared windows, lenses, mirrors and prisms between 0.5 microns and 22 microns. This material is widely used in the Forward Looking IR Systems (FLIR). Additionally, MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. Due to this, you may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - Zinc Selenide (ZnSe) Transmission Chart
Fused Silica (88)

Fused Silica is glass consisting of silica in amorphous (non-crystalline) form. It differs from normal glasses in that it contains no other materials, which are added to glass to lower the melt temperature. This material is non-birefringent and has high working and melting temperatures. It is widely used in the semiconductor sector as well as laboratory equipment. It transmits UV better than other glasses. The low Coefficient of Thermal Expansion (CTE) of this material makes it a useful material for precision mirror substrates. MPF Products, Inc. does not approve the use of ultrasonic cleaning for any viewport. We ship our viewports UHV ready. You may simply blow off the glass to remove any contaminants with clean, dry air. For additional cleaning steps for particulates or contamination from other processes, please review our cleaning procedures at UHV Viewport Cleaning Notes. Bake-Out Ramp Rate: 20°C per Minute - UV Fused Silica Transmission Chart - DUV Fused Silica Transmission Chart - EUV Fused Silica Transmission Chart
Germanium (Ge) (2)