We present a simple motorized rotation mount for a half-wave plate that can be used to rapidly change the polarization of light. We use the device to switch a high power laser beam between different optical dipole traps in an ultracold atom experiment. The device uses a stepper motor with a hollow shaft, which allows a beam to propagate along the axis of the motor shaft, minimizing inertia and mechanical complexity. A simple machined adapter is used to mount the wave plate. We characterize the performance of the device, focusing on its capability to switch a beam between the output ports of a polarizing beam splitter cube. We demonstrate a switching time of 15.9(3) ms, limited by the torque of the motor. The mount has a reaction time of 0.52(3) ms and a rotational resolution of 0.45(4)°. The rotation is highly reproducible, with the stepper motor not missing a step in 2000 repeated tests over 11 h.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/5.0139647 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Behavioral analysis of motor and non-motor impairment in rodent models of Parkinson's disease.
Front Aging Neurosci
December 2024
CHU de Québec-Université Laval Research Center, Neuroscience Axis, Québec City, QC, Canada.
Parkinson's disease (PD) is a prevalent neurodegenerative disorder characterized by the degeneration of dopamine neurons in the substantia nigra pars compacta, leading to motor and non-motor symptoms. While motor symptoms such as rigidity, tremor, bradykinesia/akinesia, and postural instability are well-recognized, non-motor symptoms including cognitive decline, depression, and anxiety also significantly impact patients' quality of life. Preclinical research utilizing animal models has been instrumental in understanding PD pathophysiology and exploring therapeutic interventions.
View Article and Find Full Text PDFAtypical development of sequential manual motor planning and visuomotor integration in children with autism at early school-age: A longitudinal kinematic study.
Autism
January 2025
Department of Psychology, Umeå University, Sweden.
Many children with autism struggle with movement difficulties, yet the causes of these difficulties remain unclear. One possible explanation is atypical motor planning and integration of visual and motoric information. Before performing a goal-directed movement, the brain creates a prediction of the movement based on visual and sensory information and previous experience, forming a "blueprint" of the motor steps needed to achieve the goal.
View Article and Find Full Text PDFMemories of hand movements are tied to speech through learning.
Psychon Bull Rev
January 2025
Experimental Psychology, University College London, London, UK.
Hand movements frequently occur with speech. The extent to which the memories that guide co-speech hand movements are tied to the speech they occur with is unclear. Here, we paired the acquisition of a new hand movement with speech.
View Article and Find Full Text PDFExploring the role of the rock climbing Treadwall as a novel therapy tool in physical rehabilitation.
PM R
January 2025
Department of Physical Medicine and Rehabilitation, Rutgers-New Jersey Medical School, Newark, New Jersey, USA.
Background: Rock climbing offers numerous health benefits, but accessibility and safety concerns limit its therapeutic use, especially for individuals with disabilities. No prior studies have explored the potential benefits of integrating the Treadwall, a rotating climbing wall with improved accessibility and safety, into rehabilitation protocols.
Objective: To evaluate the safety and feasibility of implementing a Treadwall climbing intervention as a novel therapy tool for children with hemiplegic cerebral palsy.
Effectiveness of movement representation techniques in non-specific shoulder pain: a systematic review and meta-analysis.
Sci Rep
January 2025
Faculty of Health Sciences, Department of Physiotherapy and Rehabilitation, University of Acibadem Mehmet Ali Aydınlar, Kerem Aydinlar Kampusu, Icerenkoy Mah. Kayisdagi Cad. No: 32, Atasehir, 34752, Istanbul, Turkey.
This systematic review and meta-analysis aims to assess the effects of movement representation techniques (MRT) on pain, range of motion, functional outcomes, and pain-related fear in patients with non-specific shoulder pain (NSSP). A literature search conducted in PubMed, PEDro, EBSCO, Scopus, Cochrane Library, ScienceDirect, and gray literature on April 31, 2023. We selected seven randomized controlled trials based on the PICOS framework.
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!