Camera Obscura

William Holland

Camera Obscura

moti

Mo Ti was one of the first people to use a camera obscura.  This was estimated to have been around the fifth century B.C.

lady

The camera obscura worked by light entering through a small pinhole which hits the wall inside, forming a faint image which can be traced.

candle

When the image is projected,, it appears upside down.

alhazen

Arab Physicist, Alhazen discovered that the smaller the pin hole the sharper the image came into focus.

barbalo

Daniello Barbaro discovered that replacing the pinhole with a glass lens gave the image a brighter and sharper focus.

tent

In the 17th century scientists and artists developed portable camera obscuras.  Early versions of which were simply light-proof tents with lenses sewn into the walls.

box

Later versions were long wooden boxes that projected an image onto a piece of frosted glass built into the lid.

picture

Images tend to be circular and out of focus around the edges.  The distortion was fixed with the development of the complex multilens system, in the 1700s.

Bibliography

http://english.eastday.com/e/zx/userobject1ai4047534.html

http://wernernekes.de/00_cms/cms/front_content.php?idart=506

http://commons.wikimedia.org/wiki/File:Camera_obscura_1.jpg

http://www.aip.org/history/newsletter/spr99/optics.htm

http://physics.kenyon.edu/EarlyApparatus/Optics/Camera_Obscura/Camera_Obscura.html

http://www.itraveluk.co.uk/photos/showphoto/photo/1744.php

http://www.historyofscience.com/G2I/timeline/index.php?category=Imaging+%2F+Photography+

http://www.liveinternet.ru/community/1726655/post105657715/

All information was provided by Theresa Reed Pellissippi State COmmunity College

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