[OPTICAL REVIEW Vol. 21, No. 6 (2014) 737-744]
© 2014 The Japan Society of Applied Physics

Design Method for Diffractive Lens for Imaging and Improvement of Diffraction Efficiency by Laminating Novel Nanocomposite Film on Diffractive Lens*

Tsuguhiro KORENAGA, Takamasa ANDO, Yuka OKADA, Seiji NISHIWAKI, and Masa-aki SUZUKI

Advanced Research Division, Panasonic Corporation, Moriguchi, Osaka 570-8501, Japan

(Accepted February 12, 2013)

Diffractive lenses are expected to improve a chromatic aberration and a field curvature of optical systems. However, for capturing a color image, the quality of the image is reduced due to unnecessary diffractive light. This paper shows a novel diffraction grating lens with nanocomposite material, and the design method of the lens for imaging use.

Key words: camera, diffraction grating lens, lens design, nanocomposite material, diffraction efficiency

*This is a translated version of the original paper which appeared in Kogaku 42 (2013) 332 [in Japanese].