Lensless Holographic Line Scanner

Fumio Yamagishi; Shinya Hasegawa; Hiroyuki Ikeda; Takefumi Inagaki

doi:10.1117/12.961031

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20 August 1986 Lensless Holographic Line Scanner

Fumio Yamagishi; Shinya Hasegawa; Hiroyuki Ikeda; Takefumi Inagaki

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Proceedings Volume 0615, Practical Holography; (1986) https://doi.org/10.1117/12.961031
Event: O-E/LASE'86 Symposium, 1986, Los Angeles, CA, United States

Abstract

A new lensless holographic line scanner has been developed. The scanner consists of two holographic elements, a holographic disk with a flat-field focusing function and a newly devised holographic lens. The holographic lens was designed to circularize the laser diode beam, correct scanning beam aberrations, and reduce positioning error caused by mode hopping of a laser diode. In fabricating the holographic lens, chromatic aberration caused by the difference between the wavelength used for fabrication and that used for operation was successfully corrected by the use of plano-convex and plano-concave lenses. The lensless holographic scanner was found to have a scanning beam diameter of 170 um for a scanning width of 220 mm.

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Fumio Yamagishi, Shinya Hasegawa, Hiroyuki Ikeda, and Takefumi Inagaki "Lensless Holographic Line Scanner", Proc. SPIE 0615, Practical Holography, (20 August 1986); https://doi.org/10.1117/12.961031

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