camera lu·ci·da 
(lsĭ-də)
(lsĭ-də)n.
An optical device that projects an image of an object onto a plane surface, especially for tracing.
[New Latin camera lūcida (formed on the model of CAMERA OBSCURA) : Latin camera, chamber; see CHAMBER + Latin lūcida, feminine of lūcidus, bright, full of light; see LUCID.]