• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.163-164
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• 2000

We discuss the design and fabrication of CCD or C-MOS imaging lenses with hybrid diffractive / refractive optics. The hybrid lenses are made of optical grade plastic materials. We have been able to significantly reduce the number of elements while maintaining very high optical quality. This paper describes the conception, design, fabrication and evaluation of hybrid lenses in comparison with conventional refractive lenses. The new lens has excellent optical quality, very light weight, compact size and low manufacturing cost.

• Macromolecular Research
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• v.12 no.5
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• pp.474-477
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• 2004

We present simple, low-cost methods for the fabrication of polymeric waveguides that have large core sizes for use as optical interconnects. We have used both hot embossing and micro-contact printing techniques for the fabrication of multimode waveguides using the same materials. Rectangular and large-core (60${\times}$60 $\mu\textrm{m}$$^2$) channels were readily prepared when using these methods. The dimensions of the embossed and printed channels were the same as those of the pattern on the original master. The polymeric waveguides that we fabricated with large core sizes exhibited a low propagation loss of 0.1 dB/cm at 850 nm, which indicates that hot embossing and micro-contact printing are suitable techniques for the fabrication of optical waveguides having large-core.

• Korean Journal of Materials Research
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• v.12 no.4
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• pp.254-258
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• 2002

To realize channel cross-connecting in optical communications systems, a high speed optical matrix switch was fabricated using z-cut $LiNbO_3$. For switch fabrication was design bending structure and coupling length and four $2{\times}2$ directional couplers were integrated on one substrate far construction of a $4{\times}4$ switch. Single-mode optical waveguides were formed by Ti-diffusion at a wet $O_2$ atmosphere. Ti-diffusion profile, refractive index variation and waveguide morphology were analyzed by Prism coupler and optical microscopy, respectively.

• Proceedings of the Optical Society of Korea Conference
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• 1998.08a
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• pp.154-155
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• 1998

• Proceedings of the Optical Society of Korea Conference
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• 1998.08a
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• pp.182-183
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• 1998

• Proceedings of the Optical Society of Korea Conference
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• 2001.08a
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• pp.228-229
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• 2001

• Proceedings of the Optical Society of Korea Conference
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• 1999.08a
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• pp.44-45
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• 1999

• Proceedings of the Optical Society of Korea Conference
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• 1999.08a
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• pp.88-89
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• 1999

• Proceedings of the Optical Society of Korea Conference
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• 1999.08a
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• pp.86-87
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• 1999

• Proceedings of the Optical Society of Korea Conference
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• 1999.08a
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• pp.110-111
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• 1999