Photographic Plate

Photographic Plate

Photographic plates preceded photographic film as a target medium in photography. A light-sensitive emulsion of silver salts was applied to a glass plate. This form of photographic material largely faded from the consumer market in the early years of the 20th century, as more convenient and less fragile films were introduced. However, photographic plates were still in use by some photography businesses until the 1970s, and were in wide use by the professional astronomical community as late as the 1990s. Such plates respond to ~2% of light received. Glass plates were far superior to film for research-quality imaging because they were extremely stable and less likely to bend or distort, especially in large-format frames for wide-field imaging.

Early plates used the very inconvenient wet collodion process which was replaced late in the 19th century by gelatin dry plates.

Read more about Photographic Plate:  Medical Imaging, Decline, Preservation

Other articles related to "photographic plate, plates, photographic, plate":

Photographic Plate - Preservation
... are setting up archives to preserve the original plates, preventing valuable historical astronomical data from being lost ... plan for the preservation of astronomical photographic data ... They established the Astronomical Photographic Data Archive (APDA), housed at PARI and dedicated to the task of collecting, restoring, preserving and ...
Gabriel Lippmann - Career - Colour Photography
... interest turned to a method of fixing the colours of the solar spectrum on a photographic plate ... have succeeded in obtaining the image of the spectrum with its colours on a photographic plate whereby the image remains fixed and can remain in daylight without deterioration." By April 1892, he was able to report ... by projecting an image onto a special photographic plate capable of recording detail smaller than the wavelengths of visible light ...
Spin Quantum Number - Detection of Spin - The Stern–Gerlach Experiment
... Then the beam got into non-homogeneous magnetic field and incidenced a photographic plate ... laws we would expect the single picture of the beam on the plate ... Gerlach received the two lines on the photographic plate ...
Mihajlo Idvorski Pupin - Studies in America, and Ph.D
... insulators and thin metals, leaving traces on the photographic plate, Pupin took a vacuum tube, of which he studied the passage of electricity through ... In another attempt, the Pupin - Edison fluorescent screen was placed on a photographic plate and the patient's hand on the screen ... first directed at the screen and from the screen its fluorescent light on a photographic plate ...

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