The traditional displacement measurement interferometer (DMI) provides elegant performance by straight interference fringe movement counting to convert a phase calculation into an image motion calculation. However, it cannot be applied to a curve surface displacement measurement. The counting of the movement of irregular fringes is not achievable. We provide an adaptive moiré technique with a vortex phase to realize micro displacement measurement of a freeform surface with any continuous shape. The technique produces straight moiré fringes that rotate in a circle regardless of the shape of interference fringes and tested surface shapes. The vortex phase is used to record only one interferogram before the measurement for subsequent data processing, and then it no longer participates in the displacement measurement process. Therefore, this technology can be employed to remold traditional DMIs. Simulations and experiments validating the method are presented.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.524170 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The Psychobiological Toll of Chronic Conflict: Posttraumatic Stress Symptoms, Emotion Dysregulation, and Physiology in a Conflict-Exposed Community in South Sudan.
Chronic Stress (Thousand Oaks)
March 2025
Department of Psychology, The New School for Social Research, New York, USA.
Background: Mass conflict and related displacement in South Sudan has created a significant mental health need, however extant research on the impact of conflict is limited among South Sudanese people and has predominantly relied on Western-developed self report measures.
Method: A total of 195 South Sudanese adults who work in both civil society and government leadership positions participated in a psychophysiological assessment of heart rate variability (HRV) and self-reported PTSD and emotion dysregulation symptoms to participation in the Trauma-Informed Community Empowerment (TICE) Framework, developed and implemented by the Global Trauma Project (GTP). We utilized measures of heart rate variability to determine parasympathetic activity, which may be associated with difficulties responding to stressors as well as long-term physical health morbidity and mortality.
Outcome of Conservative Treatment of Odontoid Fractures in Elderly Patients Over 80 Years Old.
Geriatr Orthop Surg Rehabil
March 2025
Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General Teaching Hospital, Prague, Czech Republic.
Introduction: The retrospective study evaluated the clinical and radiological outcomes of conservative treatment for type II odontoid C2 fractures in octogenerians. The study aimed to assess the clinical outcomes and quality of survival of patients treated using conservative methods. Additionally, the study sought to define radiological outcomes, fracture healing success and the development of complications in correlation with clinical outcomes.
View Article and Find Full Text PDFPrediction of Bolt Loosening Life: A Practical Approach Considering Variable Amplitude Loading and Multi-Bolted Structures.
Materials (Basel)
February 2025
Department of Safety Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea.
Bolted connections are crucial in joining mechanical assemblies and ensuring the integrity and reliability of structural components. This study proposes a method for estimating bolt loosening life by practically applying material fatigue life prediction methods. First, the study employed the linear cumulative damage rule to predict the loosening life of single bolts under two-block loading conditions.
View Article and Find Full Text PDFThe Psychological Impact Among Syrian Refugees in Host Countries.
Healthcare (Basel)
February 2025
Department of Nursing and Physiotherapy, Universidad de Salamanca, Avd. Donantes de Sangre s/n, 37007 Salamanca, Spain.
: Refugees face numerous challenges, including conflict, displacement, family separation, human rights violations, limited access to basic needs, and exposure to violence and torture. These experiences significantly impact their psychological well-being, leading to increased stress, anxiety, and depression. Syrian refugees in Jordan may experience higher levels of depression and anxiety than those in Spain due to harsher living conditions, limited economic opportunities, uncertain legal status, inadequate mental health services, and ongoing proximity to the Syrian conflict, whereas refugees in Spain benefit from better integration, stronger support systems, and greater stability.
View Article and Find Full Text PDFBiomechanical Evaluation of the Sheep Common Peroneal Nerve After Crush Injury.
Animals (Basel)
February 2025
Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, 4051-401 Porto, Portugal.
Axonotmesis, a common peripheral nerve injury in humans and animals, leads to significant biomechanical and physiological consequences. The lack of a standardized crushing protocol for complex animal models limits research and therapeutic translations for humans and clinically relevant animal species. This study aimed to assess the impact of different crushing forces on the biomechanical behavior of the sheep common peroneal nerve and to establish a force for standardized in vivo protocols.
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!