Lippmann method

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Photography according to the Lippmann method (around 1895)

The Lippmann process (named after Gabriel Lippmann ) is a production process for color images in photography . An extremely fine-grain black and white film ( Lippmann emulsion ) is placed with the layer side on mercury and exposed. Are formed interferences between the incident and reflected light, cause the corresponding densities in the volume of the photosensitive layer. After normal development , the image can be placed on mercury again and interference colors appear , similar to soap bubbles.

The Lippmann process is closely related to white light holography , which is also based on the photographic recording of interference.

  1. Ultra-fine grain silver halide material is used in development, but other recording media are also suitable for this process, e.g. B. dichromate gelatin or photopolymers. Mostly highly diluted developers are used, especially colloidal developers. These are closely related to physical developers.
  2. After development, the image is not placed on mercury again, but can be viewed directly using a diffuse light source (but only at a certain angle).
  3. It was found out in the early years (1894, Hermann Krone) that a mercury reflector is not always required to record a Lippmann photograph. Use is made of total reflection on the photo layer. The light therefore passes through the photographic lens, then through the glass receiving plate, in order to then be totally reflected at the air-receiving layer interface.

literature

  • Gerhard Teicher (Hrsg.): Handbook of photography . 9th edition VEB Fotokinoverlag, Leipzig 1986, ISBN 3-7311-0022-3 .
  • Hans Kleffe: From the history of photo technology . 3rd edition VEB Fotokinoverlag Leipzig 1988, p. 82ff. ISBN 3-7311-0070-3 .
  • Richard Neuhauss : The color photography after Lippmann's method. New investigations and results (Encyclopedia of Photography; Vol. 33). Wilhelm Knapp publishing house, Halle / Saale 1898.

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