Optical coating offers low refractive index

Lightspan LS-2233 is an optically clear, low-refractive-index coating dissolved in a nontoxic, nonflammable solvent.

Lightspan LS-2233 is an optically clear, low-refractive-index coating dissolved in a nontoxic, nonflammable solvent.

The coating is dry to the touch within 10min at room temperature.

Once dry, its index of refraction (less than 1.33) is low enough to aid total internal reflection as a cladding on planar waveguides or bare fibre runs, or as an antireflection coating on prisms, faceplates and lenses.

LS-2233 is chemically inert, nontoxic, and resists degradation at processing temperatures up to 300C.

Its low surface energy allows it to be used as a surface barrier film for masking or repelling migrating adhesives, inks, and oils; it is also useful as a water- or dust-repellent coating on optically sensitive surfaces, and as an optically clear mould release agent for precision plastic optics.

30cm3 containers are available from stock for prototyping and testing.

A four-page technical data sheet is available from Intertronics describing material properties, including optical transmission and refractive index against wavelength, and methods for applying the coating to substrates.

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