Scioptic ball
A scioptic ball is a universal joint allowing an optical instrument mounted on a ball to be swivelled to point anywhere in a wide arc. It was inspired by studies of the human eye.
A scioptic ball is a universal joint allowing an optical instrument mounted on a ball to be swivelled to point anywhere in a wide arc. It was inspired by studies of the human eye.
A scioptic ball is a universal joint allowing an optical instrument mounted on a ball to be swivelled to point anywhere in a wide arc. It was inspired by studies of the human eye.
Source: Wikipedia "Scioptic ball" · CC BY-SA 4.0
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