Compound Microscope Optical Diagram - Principles of Magnification #2060900 (License: Personal Use)

This engraved scientific diagram depicts the optical geometry of a compound microscope, tracing incident light from object AB through the objective lens (O) to form an intermediate real image at C, then through the eyepiece (E) to yield a final virtual, magnified image perceived by the eye. Key points-including focal planes, principal axes, and ray intersections-are annotated with letters (a-d, A-E) to clarify the physics of magnification and resolution in early microscopy.

Used in educational resources, history of science articles, or optics tutorials to explain foundational microscope design; targets students, teachers, and historians seeking visual reinforcement of geometric optics principles.