A null-balance visual densitometer

Show full item record

Redirect: RIT Scholars content from RIT Digital Media Library has moved from http://ritdml.rit.edu/handle/1850/8751 to RIT Scholar Works http://scholarworks.rit.edu/theses/7448, please update your feeds & links!
Title: A null-balance visual densitometer
Author: Baez, Ramon P.
Abstract: This thesis deals with the development of a Visual Densitometer, for measuring transmission density, called a "Null-Balance Visual Densitometer". This is a simple instrument made using a calibrated continuous tone negative step wedge. It was used for measuring continuous tone reference patches as used for process control of color separations, in place of an electronic densitometer. The measurements were made by a comparison between the control step wedge and the samples in close proximity over a light table. The basis for this instrument is the human eye's ability to differentiate between two areas of brightness in close proximity. The study involved 20 operators making visual comparisons of 22 samples that ranged between 0.20 and 2.04, two sets of measurements were made to determine if the surrounding light from the light table had an effect on the results. The test proved that the variation of the instrument as tested was greater than that is necessary for process control when making color separation negatives, (larger than 0.03) .
Record URI: http://hdl.handle.net/1850/8751
Date: 1987-04

Files in this item

Files Size Format View
RBaezThesis04-1987.pdf 2.673Mb PDF View/Open

The following license files are associated with this item:

This item appears in the following Collection(s)

Show full item record

Search RIT DML

Advanced Search