Phase Contrast Imaging Systems for Enhancing Linearity Suppressing Background-Bleaching Effects.

by H. B. Henning


Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback28 pages $20.00 $16.00 20% Web Discount

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 report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation 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.

Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit

The RAND Corporation 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.