objective

(redirected from apochromatic objective)
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Synonyms for objective

Synonyms for objective

Synonyms for objective

the goal intended to be attained (and which is believed to be attainable)

the lens or system of lenses in a telescope or microscope that is nearest the object being viewed

undistorted by emotion or personal bias

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serving as or indicating the object of a verb or of certain prepositions and used for certain other purposes

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emphasizing or expressing things as perceived without distortion of personal feelings, insertion of fictional matter, or interpretation

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belonging to immediate experience of actual things or events

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References in periodicals archive ?
One particularly short but informative chapter deals with the history of lenses, from the first spectacles manufactured in AD 1285, to modern apochromatic objectives.
These apochromatic objectives typically have lenses made from extra-low-dispersion (ED) glass or fluorite, which dramatically lower the chromatic aberration.
During the 1930s Maksutov's opticians found time to produce a wide variety of extremely challenging optical systems, including fast apochromatic objectives, aspheric projection lenses, two 14-inch f/2 Schmidt cameras, a 16-inch aplanatic reflector for Byurakan Observatory in Armenia, and a 20-inch horizontal solar telescope for Pulkovo.