I never would have guessed this myself. The answer comes from this webpage about RCA Promotional Photographs:- "This picture shows an RCA color TV camera installation at at the Walter Reed Army Medical Center in Washington, D.C. in the 1955-56 period. This system was used to televise operations for instructional purposes. The round object in the center is a high-intensity lighting fixture with an opening in the center. The mirror above the lamp allowed the TV camera to focus on the operation as it proceeded."
i wasn't right this time....
I thought it was an x-ray machine at first glance; that's why I made that the first option.
Cool! And I soooo thought I had this one guessed right!
I never would have guessed this myself. The answer comes from this webpage about RCA Promotional Photographs:- "This picture shows an RCA color TV camera installation at at the Walter Reed Army Medical Center in Washington, D.C. in the 1955-56 period. This system was used to televise operations for instructional purposes. The round object in the center is a high-intensity lighting fixture with an opening in the center. The mirror above the lamp allowed the TV camera to focus on the operation as it proceeded."