OPTICAL-INFORMATION-READING APPARATUS
First Claim
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1. An optical-information-reading apparatus comprising:
- an imaging optical system including a varifocal lens which adjusts a focal position;
an image sensor that images an imaging target of which the imaging optical system performs an image formation;
a distance-measuring system that measures the distance to the imaging target; and
a control unit that is operable to;
(i) calculate the distance to the imaging target using the distance-measuring system,(ii) control the imaging optical system based on calculated distance information to perform the image formation of the imaging target on the imaging means, and(iii) control the imaging means to image the imaging target, wherein;
the control unit calculates the distance to the imaging target using a distance measurement parameter that is characteristic of the apparatus and which has been previously been determined and stored in a memory that is accessible to the control unit.
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Abstract
An optical-information-reading apparatus includes an imaging optical system having a varifocal lens that adjusts a focal position, a solid-state image sensing device that images a code symbol, a ranging laser that measures a distance to the code symbol, and a decoder that calculates the distance to the code symbol using the ranging laser. The apparatus controls the varifocal lens based on calculated distance information.
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Citations
12 Claims
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1. An optical-information-reading apparatus comprising:
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an imaging optical system including a varifocal lens which adjusts a focal position; an image sensor that images an imaging target of which the imaging optical system performs an image formation; a distance-measuring system that measures the distance to the imaging target; and a control unit that is operable to; (i) calculate the distance to the imaging target using the distance-measuring system, (ii) control the imaging optical system based on calculated distance information to perform the image formation of the imaging target on the imaging means, and (iii) control the imaging means to image the imaging target, wherein; the control unit calculates the distance to the imaging target using a distance measurement parameter that is characteristic of the apparatus and which has been previously been determined and stored in a memory that is accessible to the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification