We propose a new type of rod lens array with improved chromatic aberration. The new rod lens array consists of several kinds of rod lenses with different gradient constants and different color filter functions. The gradient constant of each lens was prepared such that the total conjugate length was identical to the specific wavelength of the lens with a constant lens length. We call our new type of rod lens array a combination-color lens array. The characteristics of this color-type lens array are as follows: high angular aperture, short focal length, and ease of production with established procedures. The optical resolution of the rod lens array is 300 dpi in a wide wavelength range that is high enough to be applied to color scanners.
© 2004 Optical Society of America
Yoshihiro Uozu, Norifumi Hirota, and Kazuyuki Horie, "Improvement of Chromatic Aberration of a Plastic Rod Lens Array. 1. Combination-Color Lens Arrays Consisting of Several Kinds of Rod Lenses with Different Gradient Constants and Different Color Filter Functions," Appl. Opt. 43, 523-529 (2004)