The invention relates to an optical element
cleaning agent and a cleaning method thereof. The
cleaning agent comprises the following components:
sodium hydroxide,
sodium tripolyphosphate,
sodium silicate,
sodium dodecyl benzene sulfonate and emulsifiable penetrant. The cleaning method comprises: preparing a
cleaning agent by mixing
sodium hydroxide, sodium tripolyphosphate and emulsifiable penetrant according to a weight percentage ratio and dissolving the cleaning agent in water in a container to form cleaning agent
aqueous solution I; preparing a cleaning agent by mixing the raw materials including
sodium silicate,
sodium dodecyl benzene sulfonate and emulsifiable penetrant, and dissolving the cleaning agent in water in a container to form a cleaning agent
aqueous solution II; using the cleaning agent
aqueous solution I and the cleaning agent aqueous solution II with assistance from ultrasonic
waves and a pure
water conductivity of greater than 8Mohm, wherein the concentration of the cleaning agent aqueous solution I and the concentration of the cleaning agent aqueous solution II are both 0.1 to 0.8 percent and the temperature of the aqueous solutions is 30 to 70 DEG C; and performing the steps of rinsing,
dewatering,
steaming and the like to accomplish cleaning. The cleaning method is convenient to use, low in cost and good in cleaning effect.