Cleaning Optics

by Bob Hess

Although new to astronomy and other telescopic activities, I have been cleaning coated lenses and laser optics professionally since 1980. The following procedure is generally used for all types of small coated optics in laser light applications and is a bit more specific than the recommendations from Televue.

A couple of final comments. NEVER blow on a lens! Spit and dielectric coatings do not get along. Control the methanol! It is a dangerous poison that can eat into nice wood floors or cause permanent blindness if a drop gets into your eye. It is also explosive. Keep it AWAY from kids. Same thing regarding acetone even though it is readily available in hardware stores. Isopropanol (99%) is probably the safest solvent but it is not as effective on bodily oils and dries much slower.