| 356 / | HD | OPTICS: MEASURING AND TESTING |
| 3 | DF | RANGE OR REMOTE DISTANCE FINDING {9} |
| 3.01 | DF | .~ Triangulation ranging to a point with one projected beam {3} |
| 3.03 | DF | .~.~ Using a source beam with a fixed axial direction or plane {3} |
| 3.08 | ![]() | .~.~.~ With at least one paired set of staring photodetectors |