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Pinspeck Camera
A pinspeck camera is the optical reverse of a pinhole camera A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called ''pinhole'')—effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image o ...: a small (point-like) obstruction (the speck) is placed in front of the film where the (pin) hole would be in a pinhole camera. (The dark screen is “replaced” by the transparent nothing around the speck.) Whereas in a pinhole camera the hole allows rays of light from different parts of the scene to reach different parts of the film, the obstruction in the pinspeck camera causes the ''shadow'' of different points in the scene to fall on different points on the film. The result is a negative image. External links Jearl Walker ''The Pleasure of the Pin Hole Camera and Its Relative the Pinspeck Camera''* Adam Lloyd Cohen ''Anti-pinhole imaging'' Optica Acta: International J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinhole Camera
A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called ''pinhole'')—effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect. The size of the images depends on the distance between the object and the pinhole. History Camera obscura The camera obscura or pinhole image is a natural optical phenomenon. Early known descriptions are found in the Chinese Mozi writings (circa 500 BCE) and the Aristotelian ''Problems'' (circa 300 BCE – 600 CE). Ibn al-Haytham (965–1039), an Arab physicist also known as Alhazen, described the camera obscura effect. Over the centuries others started to experiment with it, mainly in dark rooms with a small opening in shutters, mostly to study the nature of light and to safely watch solar eclipses. Giambattista Della Porta wrote in 1558 in his Magia Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
