Callier effect
The Callier effect is the variation in contrast of images produced by a photographic film with different manners of illumination. It should not be confused with the variation in sharpness which also is due differences partial coherence. The directed bright-field (see Fig. 1) has extremely strong directional characteristics by means of a point source and an optical system (condenser); in this case, each point of the photographic film receives light from only one direction. The collimation of the illumination plays a fundamental role in contrast of the image impressed on a film.
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Callier effect
The Callier effect is the variation in contrast of images produced by a photographic film with different manners of illumination. It should not be confused with the variation in sharpness which also is due differences partial coherence. The directed bright-field (see Fig. 1) has extremely strong directional characteristics by means of a point source and an optical system (condenser); in this case, each point of the photographic film receives light from only one direction. The collimation of the illumination plays a fundamental role in contrast of the image impressed on a film.
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The Callier effect is the vari ...... pers of Chavel and Loewenthal.
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Callier effect
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The Callier effect is the vari ...... the image impressed on a film.
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