Chromatic Aberration-Free Grating-Lens Pair

F. Yamagishi; M. Kato; S. Maeda; H. Ikeda; T. Inagaki

doi:10.1117/12.948010

27 January 1989 Chromatic Aberration-Free Grating-Lens Pair

F. Yamagishi, M. Kato, S. Maeda, H. Ikeda, T. Inagaki

Proceedings Volume 0965, Current Developments in Optical Engineering III; (1989) https://doi.org/10.1117/12.948010
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

We have developed a high numerical aperture grating-lens pair with large wavelength allowance. It has a new "center cross" structure, in which all rays cross the optical axis between the two grating lenses. Grating-lenses have concentric grating rings with radii set to cancel the diffraction angle changes caused by wavelength change. Wavelength allowance was estimated using RMS of wavefront aberration. An example calculation showed a wavelength allowance of 20 nm for a numerical aperture of 0.7. This value is sufficient for use with laser diodes with mode hopping or multimode.

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F. Yamagishi, M. Kato, S. Maeda, H. Ikeda, and T. Inagaki "Chromatic Aberration-Free Grating-Lens Pair", Proc. SPIE 0965, Current Developments in Optical Engineering III, (27 January 1989); https://doi.org/10.1117/12.948010

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