NATALIA MOSQUERAISABELLA MEJÍA

8A

Projects a three-dimensional image.

HOLOGRAPHY

If it recives light from a proper perspective.

Is a photography technique.

A laser beam is used, wich records a photosensitive film microscopically.

For this

Used to create three-dimensional images.

The theoretical principles of holography were developed by the British physicist Dennis Gabor in 1947.

He devised a method consists of two steps:

is a log, on a photographic plate, the diffraction pattern produced by a light wave as it passes the object whose image is desired to form.

Was a light beam passing through the photographic record, once revealed the light passing through this plate is diffracted so, later an image of the object was formed on a screen.

• 1956: Emmett N. Leith, was looking for a method to record and graphically display the waveform of radar signals using optical techniques.

• 1960: When practically had the solution to his problem, he learned of the work of Gabor and his successors, and realizing that he had actually rediscovered holography.

These are the simple, real and impressive holograms, but can only be observed with a laser light.

Such holograms have a great advantage as it can be observed with ordinary lamp tungsten.

The interference fringes obtained with any imaginary or real object can be calculated by a computer. Then you can display on a screen and photograph these slots, which would be a synthetic hologram.

WITH THESE NOT ONLY REPRODUCES THE IMAGE OF THE DESIRED OBJECT, BUT ALSO THE ACTUAL IMAGE OF A HORIZONTAL SLIT OVER THE EYES OF THE OBSERVER.

Are obtained by the use of multiple lasers of different colors both during the exposure and observation.