erecting lens

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• Erecting eyepiece — eyepiece eye piece eye piece eye piece , n. (Opt.) The lens, or combination of lenses, at the eye end of a microscope, telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Syn: ocular.… …   The Collaborative International Dictionary of English

• Periscope — For the 1916 French film, see Le périscope. Principle of the periscope. The periscope on the left uses mirrors whereas the right uses prisms. a Mirrors b Prisms c Observer s eye …   Wikipedia

• Binoculars — Binocular telescopes, or binoculars (also known as field glasses), are two identical or mirror symmetrical telescopes mounted side by side and aligned to point accurately in the same direction, allowing the viewer to use both eyes (binocular… …   Wikipedia

• Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …   Wikipedia

• literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …   Universalium

• Baruch Spinoza — Infobox Philosopher region = Western Philosophy era = 17th century philosophy color = #B0C4DE| image size = 200px image caption = name = Baruch de Spinoza birth = November 24, 1632 (Amsterdam, Netherlands) death = February 21, 1677 (The Hague,… …   Wikipedia

• Cape Hatteras Light — Infobox Lighthouse caption = Cape Hatteras Lighthouse location = North of Cape Hatteras Point, Outer Banks, Hatteras Island, North Carolina coordinates = coor dms|35|15|02|N|75|31|43.7|W|region:US type:landmark yearbuilt = 1803 (original tower)… …   Wikipedia

• Flashline Mars Arctic Research Station — Flashline Mars Arctic Research Station …   Wikipedia

• Nazi architecture — was an architectural plan which played a role in the Nazi party s plans to create a cultural and spiritual rebirth in Germany as part of the Third Reich. The tribune of the Zeppelinfeld stadium in Nuremberg, where the annual Party rally took… …   Wikipedia

• Marcello Malpighi — Marcello Malpighi. Marcello Malpighi (10 March 1628 – 29 November 1694) was an Italian doctor, who gave his name to several physiological features, like the Malpighian tubule system. Contents 1 …   Wikipedia

• Race Rock Light — Infobox Lighthouse caption = Race Rock light location = Entrance to Long Island sound coordinates = coord|41|14|37|N|72|02|49|W|region:US type:landmark yearlit = 1879 automated = 1978 yeardeactivated = Active foundation = Granite and concrete… …   Wikipedia