TITLE

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

AUTHOR(S)
Dong Jun Kang; Phan Viet Phong; Byeong-Soo Bae
PUB. DATE
November 2004
SOURCE
Applied Physics Letters;11/8/2004, Vol. 85 Issue 19, p4289
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
14975003

 

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