Phase Contrast Imaging Systems for Enhancing Linearity Suppressing Background-Bleaching Effects.
ResearchPublished 1972
ResearchPublished 1972
Phase contrast objects, which retard the wavefronts of incident light but leave the intensity unaltered, would remain invisible except for Schlieren, Zernike or similar viewing techniques. Most techniques however possess little or no capability for linear operation. The present study investigates a new scheme which extends the linear operating range by about a factor of ten over previous techniques. After reviewing phase contrast imaging theories, the study analyzes the new scheme, discussess various alternative implementations, estimates the effects of fabrication errors, and assesses the opportunities for trading off linearity against a reduction in background-bleaching effects. 28 pp. Bibliog. (Author)
This publication is part of the RAND paper series. The paper series was a product of RAND from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.
This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit www.rand.org/pubs/permissions.
RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.