359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
601 | GLARE OR UNWANTED LIGHT REDUCTION {6} | |
602 | DF | .~> With mirror (e.g., mirror with glare screen, etc.) {1} |
609 | DF | .~> Display window |
610 | DF | .~> With blind for nonviewing eye |
611 | DF | .~> Barrel end or lens mount shade {1} |
613 | DF | .~> Directional or angular discrimination |
614 | DF | .~> With absorption means |