Abstract
There are three main parts to a binocular’s optical system:
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Objective lens assembly. Its function is to gather light from the object and form an image at the image plane.
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Eyepiece lens assembly. Its function is to examine the image at the image plane, rendering it visible to the observer’s eyes.
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Image orientation correction. In modern binoculars this is usually a prism assembly. In large binoculars this may also require the eyepieces to be at 45- or 90- degree angles to the main optical tube. Binoculars are usually classified by the type of prism assembly they use (e.g., “Porro prism binocular” or “roof prism binocular”) (Figure 2.1).
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Bibliography
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(2007). Binocular Optics and Mechanics. In: Binocular Astronomy. Patrick Moore’s Practical Astronomy Series. Springer, London. https://doi.org/10.1007/978-1-84628-788-6_2
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