Image reading apparatus

Details Image reading apparatus Image reading apparatus

1989-12-28

1991-03-12

Arnold, Bruce Y.

350452, G02B 308

Patent

active

049988069

ABSTRACT:
This image reading apparatus includes a light source for illuminating an object, a lens array for focusing reflected light from the object into a predetermined position, and an image sensor for reading an image formed by the focused light. The lens array includes a transparent base and a diffraction element provided on at least an incident plane and an emission plane of the base. The lens array includes an array having a plurality of lens areas. The employment of the diffraction element renders a shorter imaging distance of light from the object and thus a reduction in the size of the apparatus.

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