Short-wave Pass (SWP) Thin Film Coatings

Reynard Corporation provides thin film Short-wave Pass Filter Coatings for  commercial, aerospace and military applications. These Short-wave Pass  (SWP) coatings can either be applied to the high quality optical components and substrates that Reynard also supplies, or to customer-provided substrates.

Short-wave Pass (SWP) filter coatings are designed for wavelength selection; that is, to allow the transmission of relevant shorter wavelengths while blocking or reflecting the longer wavelengths.

Examples of Reynard Filters with Short-wave Pass (SWP) Filter Coatings:

• Visible Short-wave Pass Filters (SWP Filters – Visible): Wavelengths  shorter than the 50% “cut on” value for these Visible SWP filters are transmitted, with longer wavelengths being reflected. The transmission extends to about 0.45 times the 50% “cut on” point and reflects out to approximately 1.34 times the 50% “cut on” point. These Short-wave Pass filters can be supplied for all wavelengths, and applications include color separators or color combiners and spectral order sorters.

• Infrared Short-wave Pass Filters (SWP Filters – Infrared, or SWIR Filters): These Infrared Short-wave Pass filters transmit wavelengths shorter than their 50% “cut on” values and reflect longer wavelengths. The transmission extends to around 0.35 times the 50% “cut on” point and reflects out to approximately 1.5 times the 50% “cut on” point. These  filters can be supplied for all wavelengths. Applications for these Short-wave Pass filters include color sorting or color combining, and use as emission filters in fluorescence applications.

Short-wave Pass (SWP) filter coatings can be engineered and supplied by Reynard Corporation for all wavelengths, from UV (Ultraviolet) through the Visible, IR (Infrared) and Far Infrared bands.

Short-wave Pass (SWP) Coating Process:

Our thin film coating facility has 20 vacuum chambers, ranging from an 18” bell jar to a 54” fully automatic box coater, all in a 4000 square foot Class 1000 clean room. Processes include electron beam, ion-assisted and resistance source deposition. We have the capability to coat virtually any size and shape up to and including substrates 50” in diameter.

Available substrates include:

• Alon
• BK-7 (borosilicate crown glass)
• Calcium Fluoride (CaF2)
• Fused Silica
• Germanium (GE)
• KRS5 ( Thallium Bromo-Iodide)
• Sapphire
• Magnesium Fluoride (MgF2)
• Silicon (Si)
• Zinc Selenide (ZnSe)
• Zinc Sulfide (ZnS)
• Or as provided by the customer.

Coating materials include:

• Copper (Cu)
• Gold
• Hafnium Oxide (HfO2)
• ITO (Indium Tin Oxide)
• Magnesium Oxide (MgO)
• Nickel (Ni)
• Silicon Monoxide (SiO)
• Silver
• Titanium Dioxide (TiO2)
• Tantalum Oxide (Ta2O5)
• Zirconium Oxide (ZrO2)
• And many more…

Custom Coating Services:

At Reynard, over 80% of our business is custom. Our Short-wave Pass (SWP) coatings can be engineered and customized for your particular application, and in addition we have one of the largest and most comprehensive selection of standard and stock precision optical components in the world. Reynard Corporation is the leading global supplier of optical components to the aerospace, commercial and  military markets. We take pride in meeting and exceeding our customers’  expectations in concept, design, engineering and fabrication.

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Reynard Corporation operates per Military Specification Mil-I-45208A.