You must of read my mind because I was looking for a picture of this. This is what an atomizer looks like.
The Sun Icon
There is a common astrological, and now astronomical, symbol for the Sun. It's a circle with a dot in it. This particular image was once the alchemical symbol for gold, being "...the most perfect of the metals. For the alchemist, it represented the perfection of all matter on any level, including that of the mind, spirit, and soul."
A dot or point in the center of a circle symbolizes the blending of male and female forces. Hindus call the midpoint in a circle the bindu - the spark of (masculine) life within the cosmic womb.