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miscellaneous articles [6]click to hear

miscellaneous articles [6] overhead projector optical stage optical lens projection head mirror

overhead projector click to hear

Device that projects the enlarged image of a document printed on a transparency on a screen located behind the user.

optical stage click to hear

Glass plate that is lit by an internal light; the document to be projected is placed on it.

optical lens click to hear

Transparent optical disk that captures the light from the optical stage and makes it converge toward the mirror.

projection head click to hear

Movable part that contains the lens and mirror; a focusing ring changes its position to give a clear image on the screen.

mirror click to hear

Polished glass surface that directs light from the lens toward the projection screen.