Glass microsphere

When making surfboards for example, shapers seal the EPS foam blanks with epoxy and microballoons to create an impermeable and easily sanded surface upon which fiberglass laminates are applied.

[5] Sodium depletion has also allowed hollow glass microspheres to be used in chemically sensitive resin systems, such as long pot life epoxies or non-blown polyurethane composites.

Microspheres have been used to produce focal regions, known as photonic nanojets[7] and whose sizes are large enough to support internal resonances, but at the same time small enough, so that geometrical optics cannot be applied for studying their properties.

Previous research has demonstrated experimentally and with simulations the use of microspheres in order to increase the signal intensity obtained in different experiments.

A confirmation of the photonic jet in the microwave scale, observing the backscattering enhancement that occurred when metallic particles were introduced in the focus area.

A measurable enhancement of the backscattered light in the visible range was obtained when a gold nanoparticle was placed inside the photonic nanojet region produced by a dielectric microsphere with a 4.4 μm diameter.

Just a small amount of spacer grade monodisperse microspheres can create a controlled gap, as well as define and maintain specified bond line thickness.