September 2015
Beginner to intermediate
676 pages
25h 29m
English
Chapter 19
…A most curious country it was…. The ground was divided up into squares…. ‘I declare it’s marked out just like a large chessboard!’ Alice said at last.
Lewis Carroll
Through the Looking-Glass
Chapter 18 dealt with the production of holograms from real (and possibly virtual) objects. These are all two-step processes, involving the production first of a master hologram and then a transfer hologram, usually image plane and viewable by white light. The involvement of computer programming to correct any geometrical imperfections in the master hologram was discussed; and you might wonder what part computers might eventually play in the whole holographic process. Original sets of images are now regularly stored ...