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TM 9-254
9-3. Cleaning Optical Components - Continued
Table 9-1. Special Tools and Supplies
Nomenclature
Description
Alcohol, denatured
0E760
Acetone, technical
Lens tissue
7-1/2 X 11 inch sheets, NNN-P-40
Stainless steel pump dispenser
Lens cleaning compound
Detergent solution, MIL-C-43454
Syringe
Bulb type, 6515-X29-3340
Artist brush
Number 6
Suction adapter
Fabricated, teflon or bakelite
Lens tongs
Applicator
Fabricated, wood or fiberglass
Rapping stick
Lens tray
(1)
For initial cleaning of a component after removal from an instrument or lens cell, use a syringe or a camel hair
brush to remove any dirt which may have fallen on the lens during removal. Then apply alcohol to a pad of
cheesecloth or lens tissue and clean the component thoroughly. A light pressure should be applied to the surface
of the component when cleaning. Using excessive pressure could possibly damage the coating or put scratches
in the glass.
(2)
For final cleaning prior to installation of a lens in a cell or instrument, place the lens on a lens holder or a vacuum
suction adapter (Fig. 9-20). Wrap a small piece of lens tissue around and over the end of a wood or fiberglass
applicator (Fig. 9-21). Make sure you leave a cushioned tip over the end of the applicator so that it does not mar
the lens surface. Moisten the lens tissue with acetone and proceed to clean the lens by rotating the applicator in
a circular motion starting at the center of the lens and cleaning outward to the edge of the lens (Fig. 9-22).
Repeat the above operation until the lens is free of dirt. Lift lens from suction adapter, clean the top of the
adapter, turn lens over and repeat the cleaning operation on the other surface. Before inserting the lens in its cell
be sure the cell has been cleaned of any sealant, washed in Dry Cleaning Solvent (exposed metal) or general
purpose detergent (painted surface) and dried. Then properly orientate the lens and insert it into its cell. Hold the
cell up to the light and visually inspect for dirt or lint. If dirt or lint is present on the lens, use vacuum with proper
fabricated adapter (fig 9-23) or lens tissue to remove the contamination.
9-14 Change 6
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