Fabrication of high-efficiency Fresnel-type lenses by pinhole diffraction imaging of sol-gel hybrid materials

Journal Article · Mon Nov 08 00:00:00 EST 2004 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.1815393· OSTI ID:20634395

Kang, Dong Jun; Phong, Phan Viet; Bae, Byeong-Soo ^[1]

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1. Laboratory of Optical Materials and Coating (LOMC), Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701 (Korea, Republic of)

Sol-gel hybrid materials containing a large quantity of photoactive molecules exhibited large changes in both refractive index and volume on UV exposure. The materials were used for fabrication of Fresnel-type lenses using a simple method: pinhole diffraction imaging. With this technique, problems associated with the contact method could be overcome and Fresnel-type lenses with good focusing performance could be fabricated easily. Importantly, a high diffraction efficiency approaching 85% could be obtained.

• OSTI ID: 20634395
• Journal Information: Applied Physics Letters, Vol. 85, Issue 19; Other Information: DOI: 10.1063/1.1815393; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIFFRACTION
EFFICIENCY
FABRICATION
FILMS
FOCUSING
FRESNEL LENS
MOLECULES
PERFORMANCE
REFRACTIVE INDEX
SENSITIVITY
SOL-GEL PROCESS
ULTRAVIOLET RADIATION