A PHOTOMETRIC DISK VARIABLE AND DIRECTLY READABLE WHILE IN ROTATION, WITHOUT GEARS AND WITHOUT AUXILIARY ELECTRICAL OR OPTICAL DEVICE

✍ Scribed by KARRER, ENOCH

• Book ID: 115374795
• Publisher: Optical Society of America
• Year: 1924
• Weight: 286 KB
• Volume: 8
• Category: Article
• ISSN: 0030-3941
• DOI: 10.1364/JOSA.8.000541