Variable-focus Liquid Lens Based on a Laterally-integrated Thermopneumatic Actuator
| Autor: | Hak-Rin Kim, Geunbae Lim, Seong Ho Kong, June Kyoo Lee, Kyung-Woo Park |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Microheater
Materials science business.industry Physics::Medical Physics Physics::Optics musculoskeletal system Curvature Atomic and Molecular Physics and Optics Computer Science::Other law.invention Lens (optics) Optics law Fluidics Current (fluid) business Actuator Diaphragm (optics) Refractive index |
| Zdroj: | Journal of the Optical Society of Korea. 16:22-28 |
| ISSN: | 1226-4776 |
| DOI: | 10.3807/josk.2012.16.1.022 |
| Popis: | We report a focal-length tunable liquid lens based on thermopneumatically driven fluidic pressure. The fluidic pressure is generated by deformation of an elastomeric diaphragm induced by thermopneumaticity from a laterally integrated microheater sealed within an air chamber. The pressure is transmitted by a confined liquid to a lens diaphragm through an internal fluid channel. The liquid filling under the lens diaphragm functions as a liquid lens for dynamic focusing with properties depending on the curvature of the deformed diaphragm. The diaphragm area of the air chamber is designed five times larger than that of the lens cavity to yield high focal-length tunability by amplified deflection of the lens diaphragm. With our method, we achieved excellent focal-length tunability from infinity (without an input current) to 4 mm (with an input current of 12 mA) with a lens aperture diameter of 2 mm. |
| Databáze: | OpenAIRE |
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