Reynard Corporation provides thin film Longwave (or Long Wave) Pass Coatings for commercial, aerospace and military applications. These Longwave Pass (LWP) coatings can either be applied to the high quality optical components and substrates that Reynard also supplies, or to customer-provided substrates. Longwave Pass (LWP) filter coatings are designed for wavelength selection; that is, to allow the transmission of relevant longer wavelengths while blocking or reflecting shorter wavelengths.
Examples of Filters with Longwave Pass (LWP) Filter Coatings:
Infrared Longwave Pass (IR LWP) Filters transmit wavelengths longer than their specified 5% cut-on wavelength and block shorter wavelengths. Stock filters are optimized for collimated input at normal incidence and ambient temperature (0° AOI, f/inf, 298K). Cut-on slope for standard products is <=5% and out-of-band (OOB) transmission levels are <=0.1% average and <=1% maximum in the cited blocking range. Custom IR longwave pass filters can be designed, manufactured, and verified to meet almost any spectral and/or system operating requirement.
Visible Longwave Pass (VIS LWP) Filters transmit wavelengths longer than their specified 50% cut-on wavelength and block shorter wavelengths. Stock filters are optimized for collimated input at normal incidence and ambient temperature (0° AOI, f/inf, 298K). Out-of-band (OOB) transmission levels are <=0.01% average and <=0.1% maximum in the cited blocking range. Custom visible longwave pass filters can be designed, manufactured, and verified to meet almost any spectral and/or system operating requirement.
Longwave Pass (LWP) 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.
Longwave 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 Shortwave 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.
