Coordinate Measurement Research: Basic and Applied Experiments with the Negative-Reticle Concept.
Abstract
Experiments with the negative-reticle concept are extended on both the basic and applied levels. This concept utilizes a measuring mark which is as close to the negative of the target as possible. The result is maximum edge information and pointing stimulus. Part 1 of the study describes a basic measuring experiment which is conducted with an apparatus having a least count of 0.04 seconds of arc. The results showed a precision approaching 0.1 seconds of arc, and the experimental parameters from greatest to least concern were observer, target density, reticle density, target shape, observing illumination, and X and Y coordinate values. Part 2 of the study employed a standard comparator. Photographic images were measured with both a negative-reticle and a standard cross-reticle. The negative reticle yielded measurements which were more consistent and precise. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1972
- Accession Number
- AD0753946
Entities
People
- Jonathan C. Hescock
- Robert H. Brock
- Ronald P. Klotz
Organizations
- State University of New York