| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical information reading apparatus reducing the number of components, and also reducing assembling man-hours and adjusting man-hours. <P>SOLUTION: A marker light source 28 and a light receiving sensor 24 are supported so that a light emitting axis JM of the marker light source 28 and a light receiving axis JS of the light receiving sensor 24 become parallel by an optical system unit substrate 16 in a two-dimensional code reader. Then a position of the light receiving sensor 24 is set so that the light receiving axis JS of the light receiving sensor 24 shifts by offset amount f which is indicated as "d×n/m" (wherein a distance between the light emitting axis JM and an optical axis JL is a distance d between optical axes, a distance between a two-dimensional code and a main point P of an imaging lens 23 is an object distance m, and a distance between the main point P of the imaging lens 23 and a light receiving plate 24a of the light receiving sensor 24 is an imaging distance n) in a direction of leaving from the marker light source 28 with respect to the optical axis JL of the imaging lens 23. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
