{"title":"The challenges and focuses on plastic welding by picosecond laser in the field of camera module assembly","authors":"","doi":"10.1016/j.optlastec.2024.111751","DOIUrl":null,"url":null,"abstract":"<div><p>Polycarbonate (PC) and cyclic olefin copolymers (COC) are extensively employed in optical lenses due to their exceptional optical properties. However, mechanical clamping forces connecting lenses to each other and barrel within the camera module assembly (CMA) can lead to image quality degradation. Laser welding of plastics has emerged as an innovative technique for addressing this issue. Picosecond laser welding has successfully achieved joints between PC to PC, PC to COC, and COC to COC under optical contact (OC) and non-optical contact (NOC) conditions. Comprehensive analyses of weld zone morphology and mechanical properties have revealed diffusion bonding as the mechanism for joint formation and brittle fracture as the mechanism for fracture. By contrasting the requirements of camera module assembly with these plastic joints, the joint bonding strength is deemed adequate. However, numerous challenges and limitations hinder the advancement of laser plastic welding within the CMA field. Pertinent suggestions have been provided to address these obstacles, including the optimization of welding parameters, utilization of a high-NA focal system, and surface polishing of materials. The implementation of improved laser welding techniques is expected to significantly contribute to the future development of CMA.</p></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-09-10","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/S003039922401209X","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
Polycarbonate (PC) and cyclic olefin copolymers (COC) are extensively employed in optical lenses due to their exceptional optical properties. However, mechanical clamping forces connecting lenses to each other and barrel within the camera module assembly (CMA) can lead to image quality degradation. Laser welding of plastics has emerged as an innovative technique for addressing this issue. Picosecond laser welding has successfully achieved joints between PC to PC, PC to COC, and COC to COC under optical contact (OC) and non-optical contact (NOC) conditions. Comprehensive analyses of weld zone morphology and mechanical properties have revealed diffusion bonding as the mechanism for joint formation and brittle fracture as the mechanism for fracture. By contrasting the requirements of camera module assembly with these plastic joints, the joint bonding strength is deemed adequate. However, numerous challenges and limitations hinder the advancement of laser plastic welding within the CMA field. Pertinent suggestions have been provided to address these obstacles, including the optimization of welding parameters, utilization of a high-NA focal system, and surface polishing of materials. The implementation of improved laser welding techniques is expected to significantly contribute to the future development of CMA.
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