{"title":"Realization of SMA bimorph based composite mirror and actuator in a Stewart platform arrangement for beam steering application","authors":"Kaushal Gangwar, Srijan Parashar, Palani Iyamperumal Anand","doi":"10.1016/j.optlastec.2025.112765","DOIUrl":null,"url":null,"abstract":"<div><div>This work explores application of NiTi shape memory alloy (SMA) thin film composite structure in a parallel manipulator assembly for laser beam steering. A thin and lightweight NiTi SMA based mirror fabricated by thermal evaporation was manipulated with the help of four bimorph actuators assembled in a Stewart platform arrangement. By utilizing ArUco-based markers and computer vision techniques, the live position of the mirror was monitored. The program analyzed the position and tilt of three ArUco markers on the mirror to determine the tilt of the mirror on actuation. The maximum tilt of the mirror achieved was 28.76° with respect to x direction for an 8 V supply and 0.25 Hz frequency. Moreover, the position of the laser beam reflected from the micromirror was also studied. The maximum deflection achieved for the reflected laser beam was 1.01°±0.18° in x-direction and 0.42°±0.05° in z-direction.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"187 ","pages":"Article 112765"},"PeriodicalIF":4.6000,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Laser Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030399225003536","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
This work explores application of NiTi shape memory alloy (SMA) thin film composite structure in a parallel manipulator assembly for laser beam steering. A thin and lightweight NiTi SMA based mirror fabricated by thermal evaporation was manipulated with the help of four bimorph actuators assembled in a Stewart platform arrangement. By utilizing ArUco-based markers and computer vision techniques, the live position of the mirror was monitored. The program analyzed the position and tilt of three ArUco markers on the mirror to determine the tilt of the mirror on actuation. The maximum tilt of the mirror achieved was 28.76° with respect to x direction for an 8 V supply and 0.25 Hz frequency. Moreover, the position of the laser beam reflected from the micromirror was also studied. The maximum deflection achieved for the reflected laser beam was 1.01°±0.18° in x-direction and 0.42°±0.05° in z-direction.
期刊介绍：
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems
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