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مقاله سیستم اندازه گیری موضوع : مقاله سیستم های اندازه گیری The Auto-collimator is a single instrument combining the functions of a collimator and a telescope to detect small angular displacements of a mirror by means of its own collimated light. The two reticles are positioned in the focal plane of the corrected objective lens, so that the emerging beam is parallel. This usual configuration is known as infinity setting, i.e the auto-collimators are focused at infinity. When moving the reticles out of the focal plane of the objective lens, the auto-collimator can be focused at finite distances, and the beam becomes divergent (producing a virtual image) or convergent (real image). This results in a focusing auto-collimator. The shape of the beam -convergent or divergent- depend on the direction in […]
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