359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
507 | PROTECTION FROM MOISTURE OR FOREIGN PARTICLE {6} | |
508 | DF | .~> Optical element rotates |
509 | DF | .~> Fluid directed across optical element |
510 | DF | .~> Microscope drape |
511 | DF | .~> Cap or cover |
512 | DF | .~> Humidity or temperature control |
513 | DF | .~> Sealing {1} |