| 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} |
| 223 | DF | .~ By moving a reflective element {3} |
| 225 | ![]() | .~.~ Pivoting or moving in circular arc |