The Projector

DCS Code: 6A70.35 Last Updated: March 27, 2026
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Safety Warnings

Purpose

Display the parts of an overhead projector or assemble a slide projector from components on an optical bench. Students see how the thin lens equation governs real image formation, magnification, and the practical design tradeoffs in projection systems.

Technical diagram of an overhead projector showing internal components (lamp, reflector, Fresnel lens, mirror, projection lens) with labeled parts, and a ray diagram below showing how condensing lens, slide aperture, and projecting lens form an image on a screen
Figure 1: Overhead projector schematic (top) and ray diagram (bottom) showing the light path from source through condensing lens, slide aperture, and projection lens to the screen.