Speeded-Up Focus Control of Electrically Tunable Lens by Sparse Optimization.

ABSTRACT: Electrically tunable lenses (ETL), also known as liquid lenses, can be focused at various distances by changing the electric signal applied on the lens. ETLs require no mechanical structures, and therefore, provide a more compact and inexpensive focus control than conventional computerized translation stages. They have been exploited in a wide range of imaging and display systems and enabled novel applications for the last several years. However, the optical fluid in the ETL is rippled after the actuation, which physically limits the response time and significantly hampers the applicability range. To alleviate this problem, we apply a sparse optimization framework that optimizes the temporal pattern of the electrical signal input to the ETL. In verification experiments, the proposed method

SUBMITTER: Iwai D 

PROVIDER: S-EPMC6710262 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature