How does the image of a hologram differ from that of a common photograph?

Answer 1

If you have ever seen a hologram image in person, you wouldn't mistake it for a common photo! When illuminated with the same kind of light as the hologram was produced with, the image looks almost exactly like the original object did, at the same size as the original object and sharing its optical properties.

On the other hand, under ordinary room lighting, any image that may appear in the hologram would be badly blurred and show a lot of color fringing, except one made very close to the imaging film as a white light hologram would be. The image also does not appear at the film surface as a normal image would, but you must look through the film to where the image is. The film itself looks like an ordinary piece of film with a slight to moderate amount of fog on it, and perhaps with some diffraction patterns that bear almost no resemblance to the object encoded in the film.

The hologram also works on a completely different principle from a common photo, using diffraction and interference effects within the film to produce the image, rather than differential absorption and transmission reflection effects like a common photo.

Answer 2

A photograph's image is captured light bouncing off an object.

A hologram's image is created by the interference pattern of two laser beams bouncing off a single object. And any small portion of a hologram contains all of the information present in the whole hologram. ...that doesn't work with photos: you can't, for instance, cut a corner off a photo and still be able to tell that it was of aunt bertha and her infamous spagetti hat.

Answer 3

A hologram is 3-Dimensional, while a common picture is 2-dimensional.