Definitions

1. noun

An optical instrument used to produce a spiral or circular image, typically of a rotating object, by scanning it with a narrow beam of light.

“The artist used a rotascope to create a stunning animation for her short film.”

2. noun

A device used in the early days of film to create a three-dimensional effect by scanning a two-dimensional image.

“The rotascope was an essential tool for creating special effects in the 1920s.”