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Proceedings Paper

Holographic disk scanner for laser printers
Author(s): Yoshikazu Kawauchi; H. Yamashita; K. Saitoh
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Paper Abstract

The design of a disktype holographic scanner with a laser diode to correct for scanline deviation and scan nonlinearity and to reduce aberration is described. By dividing a hologram facet into three parts three performance functions are optimized independently. The spot diameters obtained (at l/e2) are less than 9Ojim for maximum scanline deviation of and scanlinearity error of within the scan length of 210m. 1 . I NTRODUCT I ON In designing holographic scanners it is difficult to satisfy the properties of scanline deviation scan linearity and spot diameter because there is a tradeoff relationship between aberration scan spots and scan linearity. " This paper provides a hologram facet design divided into three parts in which three performance functions are optimized independently by ray tracing and the damped leastsquares method. The calculation of waveoptical diffraction intensity is included to increase the numerical accuracy. 2. PROEDURE AND NUMERICAL RESULTS A hologram facet is divided into three unequal but symetric parts. The optimization is performed such that the center region is optimized first next the side regions are optimized and then the positions of spots in each region are adjusted. After that the scanning properties are evaluated over the whole scan length. The results of three performance functions (dotted lines) are shown in Fig. l and Fig. 2 as compared with the results for the conventional undivided facet (solid lines). The figures show

Paper Details

Date Published: 1 July 1990
PDF: 1 pages
Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); doi: 10.1117/12.34912
Show Author Affiliations
Yoshikazu Kawauchi, Matsushita Research Institute Tokyo, Inc. (Japan)
H. Yamashita, Matsushita Research Institute Tokyo, Inc. (Japan)
K. Saitoh, Matsushita Research Institute Tokyo, Inc. (Japan)


Published in SPIE Proceedings Vol. 1319:
Optics in Complex Systems

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