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optical wedge

A Dictionary of Astronomy | 1997 | © A Dictionary of Astronomy 1997, originally published by Oxford University Press 1997. (Hide copyright information) Copyright

optical wedge A strip of glass or other transparent material whose light transmission decreases evenly from one end to the other. The change in light transmission is accomplished by applying a coating whose thickness increases along the wedge, or by an increase in photographic density. The wedge is used at the eyepiece to reduce the intensity of a star in the field of view until it appears the same brightness as another, fainter, comparison star. The magnitude difference between the stars can then be measured.

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Wedge clamps. (column)
Magazine article from: Modern Machine Shop; 9/1/1989; ; 700+ words ; ...examples of self-releasing conical wedges. Flat Wedges--This type of wedge is normally made with a single tapered...clamping action is achieved by using two wedges together. In this application one wedge is stationary and one is movable...
Wedge bonding tools for fine-pitch applications: connecting leads to die involves precise tool selection.(Tech Tips)
Magazine article from: Circuits Assembly; 6/1/2009; 700+ words ; ...to move under the foot of the wedge. This will result in poor accuracy...the wire is fed through the wedge. This will result in wire slivers...can be prevented by requesting wedges with polished holes to remove...small individual bond pads. Wedge bonding can achieve finer pad...
WEDGE Group Names Michael E. Little President and CEO.
PR Newswire; 12/8/2003; 700+ words ; ...HOUSTON, December 8 /PRNewswire/ -- WEDGE Group's Board of Directors announced...Executive Officer immediately. Little joins WEDGE from Pioneer Drilling (Amex: PDC) where he served as Chairman and CEO. WEDGE's current President and CEO, William...
Wedge is more than old enough to manage.
Newspaper article from: The News-Sentinel (Fort Wayne, Ind.) (via Knight-Ridder/Tribune News Service); 10/29/2002; 700+ words ; Byline: Reggie Hayes CLEVELAND _ Eric Wedge doesn't look young, for starters. He...attribute that usually defies definition, but Wedge has it. So all the hubbub about him being...without the evidence upon which to dream. Wedge, it should be clear even on first impressions...
Wedge is more than old enough to manage.(Knight Ridder Newspapers)
Newspaper article from: Knight Ridder/Tribune News Service; 10/29/2002; ; 700+ words ; CLEVELAND _ Eric Wedge doesn't look young, for starters. He...attribute that usually defies definition, but Wedge has it. So all the hubbub about him being...without the evidence upon which to dream. Wedge, it should be clear even on first impressions...
Wedge Politics and Welfare Reform in Australia.
Magazine article from: The Australian Journal of Politics and History; 9/1/2001; ; 700+ words ; ...Howard Government adopting the tactics of "wedge politics" has drawn attention to divisive...attract support for their policies. Although wedge politics has entered the political language...systematic treatment to the tactics of wedge politics and indicate how such tactics...
Wedge on top of his game.(Knight Ridder Newspapers)
Newspaper article from: Knight Ridder/Tribune News Service; 3/3/2003; ; 700+ words ; ...ST. PETERSBURG, Fla. _ How does Eric Wedge know? From the day he was named manager of the Cleveland Indians last fall, Wedge has behaved like a man who precisely understands...development often takes precedence. But when Wedge took the Tribe's managerial post from...
Wonderful Wedges.
Newspaper article from: The Daily Mail (London, England); 8/14/2008; 511 words ; ...com Gold peep-toe cut-out wedge, ?10, New Look, 0500 454094 Green fabric wedge, ?15, Faith, 0845 880 1195...com Fuchsia high peep toe wedges, ?39, Pied a Terre, as before Red and white spot wedge with bow front, ?10, Matalan...
Sediment wedge may be buffer against sea level rise
News Wire article from: The Hindustan Times; 3/5/2007; 700+ words ; ...said Anandakrishnan. Researchers said that the wedge depicted by radar imaging closely matched wedges found beyond the floating Ross Sea on the ocean...present day location, indicating that this wedge formation is a natural part of ice stream movement...
Wedge looking ahead, not back
Newspaper article from: The Boston Globe; 10/20/2007; ; 700+ words ; ...fine," pronounced Indians manager Eric Wedge. "It's one game. It's over." Naturally...they could have a workout at Fenway Park, Wedge opted to give his players one more night...the ballpark expecting to win," said Wedge. There had been great anticipation about...

Related entries from encyclopedias, dictionaries, and thesauruses

wedge
Book article from: The Oxford Pocket Dictionary of Current English wedge / wej / • n. a piece of wood...piece of something having such a shape: a wedge of cheese. ∎  a formation...v. 1. [ tr. ] fix in position using a wedge: [ tr. ] the door was wedged open. 2...
accretionary wedge
Book article from: A Dictionary of Earth Sciences accretionary wedge ( accretionary prism ) A tectonically thickened wedge of sediment found on the landward side of some trenches . The accretionary wedge consists of oceanic sediment scraped off the subducting plate (see SUBDUCTION ), plus sediment...
Wedge
Dictionary entry from: Dictionary of Collective Nouns and Group Terms Wedge anything in the form of a wedge, e.g., a body of troops; a group of animals or birds; silver plate collectively, 1725. Examples: wedge of cheese, 1835; of wild fowl, 1869; of clangorous geese, 1889...
salt wedge
Book article from: A Dictionary of Ecology salt wedge An intrusion of sea water into a tidal estuary in the form of a wedge along the bed of the estuary. The lighter fresh...water masses is caused by estuarine topography. Salt wedges are found in estuaries where a river discharges through...
optical wedge
Book article from: A Dictionary of Astronomy optical wedge A strip of glass or other transparent material whose...applying a coating whose thickness increases along the wedge, or by an increase in photographic density. The wedge is used at the eyepiece to reduce the intensity of a...

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