what is this device?\ncamera obscura\ncamera lucida\noptical lens\noptical mirror

Brief Explanations:

The device shown is a Camera Lucida. It is an optical device used by artists to help them draw or trace objects by allowing them to see a real - world scene and their drawing surface simultaneously. The Camera obscura is a darkened box with a small hole through which light enters to project an inverted image on the opposite side. Optical lenses and mirrors are individual components rather than the whole device shown.

Answer:

B. Camera Lucida