IEEE Photonics Technology Letters · 1989 · 42 citations · 1 references
Optical DesignOptical MaterialsEngineeringOptic DesignFiber OpticsMicro-optical ComponentMicro FresnelMicro Fresnel LensSmall Lens DiameterHigh-diffraction EfficiencyOptical PropertiesTransparent MaterialsMicrostructuringOptical SystemsMaterials SciencePhotonicsClassical OpticsOptical ComponentsMicrofabricationGeometrical OpticApplied PhysicsGeometrical AberrationOptical SciencesFlexible OpticsOptical System AnalysisDiffractive Optic
A high-diffraction efficiency (>50%), small lens diameter (0.5 mm phi ), short focal length (1 mm), and thin (0.25 mm) molded micro Fresnel lens suitable for compact optical devices is discussed. The device is fabricated by means of a photopolymerization process using a UV-curable resin. By adopting glass as the substrate, low-wavefront aberration (<0.04 lambda , RMS value) and diffraction-limited focusing characteristics have been obtained at ambient temperatures between 20 degrees C and 100 degrees C. These characteristics are superior to those in a conventional aspherical plastic lens.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Spherical Grating Objective Lenses for Optical Disk Pick-ups
Kenya Goto, Kazushige Mori, G. Hatakoshi et al. · Japanese Journal of Applied Physics · 1987 · 12 citations · Full text