immersion objective

American  

noun

Optics.

1. a microscope objective of high resolving power in which the space between the front lens and the cover glass is filled with an oil whose index of refraction is close to that of the objective and the cover glass.

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Example Sentences

Capillaries were imaged at approximately 30 µm depth within the molecular layer of cerebellar slices or the grey matter of slices containing the somatosensory and motor cortices, using a ×40 water immersion objective, a Coolsnap HQ2 CCD camera, and ImagePro Plus or Metafluor acquisition software.

From Nature

Hence follows the rule, that the investigation of a case of severe anæmia should never be considered closed, before three or four preparations at least have been minutely searched for megaloblasts under an oil immersion objective.

From Project Gutenberg

With the oil immersion objective, however, an achromatic condenser, giving an illuminating cone of about 0.9, should be used if the full value of the lens is to be obtained.

From Project Gutenberg

As my equipment included the best microscopical apparatus made, I had strong hopes that in properly stained preparations of blood taken from the circulation of yellow fever patients my Zeiss 1-18 oil immersion objective would reveal to me the germ I was in search of.

From Project Gutenberg

Let r represent the silvered surface of the glass disk, b, the immersion objective, f, the thin glass cover.

From Project Gutenberg