Photographic device with screen for controlling gradation of pho

Details Photographic device with screen for controlling gradation of pho Photographic device with screen for controlling gradation of pho

1982-12-07

1984-09-25

Perkey, William B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250214P, G03B 728, G03B 1100

Patent

active

044732880

ABSTRACT:
In a photographic device, there are provided (a) a means for measuring luminous intensity distribution on an object and (b) a screen means for controlling gradation of an image to be formed on a photosensitive material in accordance with the luminous intensity distribution and/or maximum/minimum luminous intensity difference of the object measured by the means (a).

REFERENCES:
patent: 3955208 (1976-05-01), Wick et al.
patent: 4040067 (1977-08-01), Kondo
patent: 4047187 (1977-09-01), Mashimo et al.
patent: 4050814 (1977-09-01), McFadden
patent: 4054890 (1977-10-01), Shimomura
patent: 4162831 (1979-07-01), Gold
patent: 4176955 (1979-12-01), Yamada et al.

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