Lasers And Holography Midterm

Front 1

Information Processing

Back 1

Holography is an information processing technology. It allows for the recording and retrieval of information. Most holograms require a real, three-dimensional object.

Front 2

Diverged and Undiverged Beams

Back 2

The unspread, concentrated laser beam is called an undiverged beam this is when it is most dangerous. When the beam is spread out it is called a diverged beam.

Front 3

Human Vision: Pattern recognition in the mind

Back 3

The eyes gather and categorize light. Then, they transmit this info in the form of a series of signals, to a part of the brain called the visual cortex. Here is the juncture of brain and mind. The signals are recognized and formed into patterns, and these patterns are what we “see” - what becomes our visual reality. Sometimes these patterns are similar to some formed in the past, and we recognize them. Sometimes the patterns are new, and we learn to give them meaning.

Front 4

Latent Image

Back 4

An invisible image produced by the exposure to light of a photosensitive material such as photographic film.

Front 5

Stereo Pairs

Back 5

Uses the basic idea that humans see by mentally combining two separate sets of visual information (one from each eye). Viewmasters.

Front 6

Anaglyphs

Back 6

Uses two colored lenses, usually red and blue, sometimes red and green. Think of cardboard 3D glasses.

Front 7

Lenticulars

Back 7

Uses multiple of lenses to project many different views of subject.

Front 8

Polarization

Back 8

Relies on the orientation of light waves as they crest and trough thru space. New age 3D movies use this technique.

Front 9

Interocular Distance

Back 9

The average distance between two eyes, approx. 2-2.5”, or 65mm

Front 10

Point-to-Point Correspondence

Back 10

Unlike a photograph, which only stores individual information points at individual sites, there is no point-to-point correspondence between a holographic image and the original object.