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

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 a...

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Veröffentlicht in:Applied physics letters 2004-11, Vol.85 (19), p.4289-4291
Hauptverfasser: Kang, Dong Jun, Phong, Phan Viet, Bae, Byeong-Soo
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1815393