| 359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
| 196 | DF | DEFLECTION USING A MOVING ELEMENT OR MEDIUM (OFFSETTING OR CHANGING AT LEAST A PORTION OF THE BEAM) {3} |
| 197 | DF | .~ Using a periodically moving element (periodic change of optically reflecting, refracting or diffracting element) {6} |
| 212 | DF | .~.~ Including reflective type moving element {4} |
| 213 | DF | .~.~.~ Having oscillating element {1} |
| 214 | | .~.~.~.~ Single plane mirror element {1} |
| 215 | DF | .~.~.~.~.~> With imaging lens |