Method of modifying projected images

Details Method of modifying projected images Method of modifying projected images

1984-02-14

1985-03-19

Perkey, William B.

Optics: motion pictures

Removable film strip magazine type

354354, 352 41, 352 69, 353 30, 353 97, G03B 2114, G03B 3704, G03B 4100

Patent

active

045055580

ABSTRACT:
A method of modifying projected images is disclosed wherein light is projected on a screen in a manner which provides information concerning the desired characteristics of the image. The parameters of optical attenuators required to obtain the desired image are derived by exposing a section of light sensitive material to light from the screen while the section is situated at an intermediate image plane in the optical system of at least one projector. Subsequently, the exposed section is processed to recite the information recorded thereon visible. The desired characteristics of a field stop attenuator are obtained by modifying the shape of the projected image to the shape desired. The desired characteristics of a neutral density attenuator are obtained by modifying the intensity of the projected image to that desired. The method may be used with either single-channel or multi-channel projection apparatus.

REFERENCES:
patent: 2004798 (1935-06-01), Poser
patent: 2544116 (1951-03-01), Waller et al.
patent: 2610544 (1952-09-01), Waller et al.
patent: 3088366 (1963-05-01), Petrov et al.
patent: 3233509 (1966-02-01), Swiggett

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