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A Latent Image Distribution Study Of "Dry-Writing" Photo-Recording Materials, Joseph Geller
A Latent Image Distribution Study Of "Dry-Writing" Photo-Recording Materials, Joseph Geller
Theses
Improving silver halide emulsions used for the direct writing of oscillographic traces is a topic not discussed openly in the technical literature. It has been previously thought that good contrast between image and background depends upon the extreme low-intensity reciprocity law failure of these emulsions combined with their ability to be desensitized by low-intensity light. Evidence presented in this report indicates that low-intensity reciprocity law failure is very desirable for the surface image; however, for the internal image, the most practical* of the three materials tested reveals no reciprocity law failure within the time interval from IO*2 to 10*6 seconds …
A Method Of Calibrating A Photo Optical System For Determining Spatial Relationships, E. Glab, D. Zimmerman
A Method Of Calibrating A Photo Optical System For Determining Spatial Relationships, E. Glab, D. Zimmerman
Theses
A technique is described for the calibration of a photo-optical system. This technique yields a response surface. Measurements of image density and image width taken from a microdensitometer trace can be related through this response surface to object dimensions.
Revelations: The Analysis And Synthesis Of Images, Scanlon F.
A Sophistication Of The "Effective Exposure" Method Of Compensating For The Chemical Amplification Of The Photographic Emulsion As Applied To The Determination Of The Modulation Transfer Function, Lloyd Leiderman
Theses
Known exposures were impressed upon Panatomic-x film by imaging interferometrically generated cosinusoidal intensity distributions of 24, 64, and 96 cycles per millimeter and micro-character istic curves of the material were constructed.
A Multi-Exposure, High Resolution Camera For The Production Of A Resolving Power Test Target, With Extended Range, Richard Bergen
A Multi-Exposure, High Resolution Camera For The Production Of A Resolving Power Test Target, With Extended Range, Richard Bergen
Theses
Since 1888, a series of mutually perpendicular lines have been used as a test object for evaluation of optics, systems, products, etc. The availability of such test objects has traditionally been in the frequency range of about one cycle per millimeter to a couple hundred cycles per millimeter. These have been available from a few manufacturers, none of which offers the extended range of .25 cycles per millimeter to greater than one thousand cycles per millimeter proposed in this project. The usefulness of such an extended range serves to make it an all-purpose test target for measurement of enlarging, contact …
A Study Of The Low Current Density Electrolysis Of Ammonium Thiosulfate Fixers, John Bowman
A Study Of The Low Current Density Electrolysis Of Ammonium Thiosulfate Fixers, John Bowman
Theses
Determinations of the current tolerences of sodium thiosulfate and ammonium thiosulfate fixers are made and compared. The rate of fixation of ammonium thiosulfate fixer before and after electrolysis is studied. The current efficiency of low current density electrolysis in ammonium thiosulfate is found. Causes and forms of sulfiding are discussed and related to the work of the experimenter.