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Conceptos
Modern stereomicroscopes are built according to either of two design concepts:
The Greenough Concept
The Telescope (CMO = Center Mounted Objective) Concept
Two identical objectives, arranged with their optical axes including a small angle, generate two separate images. Observed through separate eyepieces, they combine toform a 3-dimensional image.
Two microscope systems arranged in parallel share a common objective.
The stereo angle is formed by the extra-axial pairs of rays.
Advantages:
Advantages:
low cost
compact
basic instruments with high optical performance
upgradable
modular design
attachment of many accessories possible