We show the possibility of simultaneously eliminating all third-and fifth-order monochromatic aberrations by using an objectiveconsisting of three cemented lenses with radial distribution ofrefractive indices. We present design procedures for removal ofthese aberrations and reduction of residual higher-orderaberrations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ao.37.002687 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Risk of Postoperative Periprosthetic Femoral Fracture After Total Hip Arthroplasty Depends More on Stem Design Than Cement Use: An Analysis of National Health Data from England.
J Bone Joint Surg Am
January 2025
Leeds Institute of Health Sciences, School of Medicine, University of Leeds, Leeds, West Yorkshire, England.
Background: In this study, we estimated the risk of surgically treated postoperative periprosthetic femoral fractures (POPFFs) associated with femoral implants frequently used for total hip arthroplasty (THA).
Methods: In this cohort study of patients who underwent primary THA in England between January 1, 2004, and December 31, 2020, POPFFs were identified from prospectively collected revision records and national hospital records. POPFF incidence rates, adjusting for potential confounders, were estimated for common stems.
Numerical study of comparing skirt sandpile with deep cement pile to improve load‒settlement response of circular footing in layered soils: Centric and eccentric effects.
Heliyon
January 2025
Department of Geotechnical Engineering, Faculty of Civil Engineering, Tishreen University, Latakia, Syria.
This study investigates the performance of a skirt sand pile (SSP) system beneath a circular shallow footing using three-dimensional finite element analysis calibrated against a large-scale experimental setup. The SSP, measuring 8.00 m in length and 1.
View Article and Find Full Text PDFMicro CT evaluation of marginal discrepancies of endocrown restored molars with different intrapulpal depths and materials of fabrication. (in-vitro study).
BMC Oral Health
January 2025
Faculty of dentistry, Ain Shams University, Cairo, Egypt.
Objective: The purpose of this study was to evaluate the effect of different preparation depths (0, 2 and 4 mm) of different restoration designs (classic endocrown design versus overlay design) on marginal adaptation of restorations fabricated of two different restorative materials (lithium disilicate and PEEK).
Materials And Methods: Sixty mandibular natural molars were collected as abutments for the restorations of this study, and grouped in three main groups of different cavity depths (0, 2 and 4). Each group was divided into two subgroups according to material of fabrication to (L) for lithium disilicate (IPS emax CAD, Ivoclar vivadent, Switzarland) and (P) for PEEK (Bio-hpp, Bredent, Germany).
Waste marble sludge and calcined clay brick powders in conventional cement farina production for cleaner built environment.
Sci Rep
January 2025
Center for Global Health Research, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
In the manufacturing of some sectors, such as marble and brick, certain byproducts, such as sludge, powder, and pieces containing valuable chemical compounds, emerge. Some concrete plants utilize these byproducts as mineralogical additives in Turkey. The objective of the experimental study is to ascertain whether the incorporation of waste from the marble and brick industries, in powder form, into cement manufacturing as a mineralogical additive or substitute is a viable option.
View Article and Find Full Text PDFTechnique for improving concrete characteristics with bacillus: Insights on strength and durability.
MethodsX
June 2025
Department of Civil Engineering, SIT, Symbiosis International Deemed University, Pune, India.
Numerous problems, including weathering, cracks, leaks, and bending, among others, appear in concrete after construction. The optimum procedure for treating concrete cracks is the subject of this study. The research goal is to find potential crack treatment materials and analyze the effect on the properties of concrete caused by the addition of bacterial solution to the concrete mix along with a particular method of preparation of bacterial solution.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!