Keishi Shimizu

Three-Dimensional Prints with Pinned Cylindrical Lens Arrays

An application of pinned cylindrical lens arrays (CLAs) reported in Opt. Rev. 19 (2012) 287 to three-dimensional prints is presented for the first time. This lens fabrication method features the easy control of the pitch and radius of curvature of the lens arrays by taking advantage of the pinning effect that the partition walls created on a polymeric substrate by scratching with a cutter blade prevent the ultraviolet curable polymer dispensed between the walls from spreading. It is demonstrated in this paper that a three-dimensional print was realized successfully with the pinned CLA fabricated with our method.

Pinned Square Lens Arrays and Their Application to Integral Photography

A fabrication method for square lens arrays together with their application to integral photography is presented. Our square lens arrays are fabricated by a technique similar to the fabrication of cylindrical lens arrays that was reported in Opt. Rev. 19 (2012) 287. This technique features the easy control of the pitch and radius of curvature of the lens arrays. The lens pitches in both transverse and longitudinal directions are controlled by adjusting the interval of partition walls created by scratching a polymeric substrate with a sharp edge. The radius of curvature is controlled by adjusting the volume of the ultra-violet curable polymer deposited into square apertures formed by the partition walls. The vertices of the partition walls prevent the spreading of the polymer owing to the pinning effect. It is also demonstrated that our square lens array succeeded in realizing three-dimensional integral printing.

Simple evaluation method of multimode polymer optical waveguides for next generation FTTH application

Polymer optical waveguide devices are getting popular for next generation FTTH application. In order to accelerate the development of polymer optical devices, evaluation of waveguide characteristics should be speeded up. Polymer optical chip containing a combination of 45°-angled cut waveguide, Y-splitter and S-bend structures was designed and fabricated for simple evaluation of multimode waveguides. Input launching such as light source, mode scrambler was investigated for reliable measurement.