Denso Corporation

Kabushiki Kaisha Toyota Chuo Kenkyusho

Denso Wave Corporation

Chie Toyoda

Hiroyuki Matsubara

Kunihiko Ito

Satoru Kato

Toshihiko Tsukada

Yoshimi Kitazumi

Tamotsu Mizuno

There is provided a device for reading a code on a subject. The device includes an imaging unit provided with an imaging element, a depth-of-field extending unit, and an optical distorting unit. The imaging unit captures an optical image formed on a light-receiving surface of the subject. The depth-of-field extending unit acquires a focused image regardless of distance to the subject, within a predetermined read-out range. In the optical distorting unit, the captured optical image is distorted such that i) the focused image at a minimum distance in the read-out range includes an overall image of the code and ii) the focused image at a maximum distance in the read-out range is provided so as to allow at least a predetermined number of pixels to be assigned to a unit image of the code.

Device for optically reading information codes

A light scanning apparatus including a light source for emitting light in a direction different from a direction orthogonal to the reference direction, and a rotating reflection body that rotates about an axis inclined at an inclination angle &#x3c6; to the reference direction and includes at least one reflecting surface that is disposed in a direction intersecting obliquely with the axis and reflects light incident on the reflecting surface at an incident angle &#x3b8;. A specific scanning direction is a direction intersecting at an angle to the reference direction and the rotation axis inclination angle &#x3c6;&#x2260;0&#xb0;. The inclination angle &#x3c6; is predetermined according to the incident angle &#x3b8; such that deviation of the scanning beam reflected by the reflecting surface is smaller than the deviation of the scanning beam that would be obtained with the inclination angle &#x3c6; of the rotation axis 0&#xb0;.

Light scanning apparatus and separation distance measurement apparatus

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Nagoya, Japan

Chie Toyoda