Dimension measuring apparatus, information reading apparatus having measuring function, and dimension measuring method

An information reading apparatus having a measuring function, the apparatus comprising:

• a laser radiator that applies a laser beam to a first surface of an object;
• a decoder that measures a distance from the object to the information reading apparatus by using reflection light of the laser beam reflected on the object;
• an image sensor that captures an image of the object to which the laser beam is radiated, while adjusting a focus in accordance with the distance from the object;
• a code reader that analyzes the image to read information provided on the object;
• and
• a dimension measurer that measures a length of the first surface of the object based on the image and the distance from the object,
• wherein the information reading apparatus moves to another position to measure a length of a second surface of the object.

A dimension measuring method performed by a dimension measuring apparatus, the method comprising:

• radiating a laser beam to form at least two feature points on a first surface of a measurement target object;
• measuring a distance from the measurement target object to the dimension measuring apparatus by using reflection light of the laser beam reflected on the measurement target object;
• capturing an image of the measurement target object to which the laser beam is radiated;
• measuring a length of the first surface of the measurement target object on a line connecting the at least two feature points based on the distance from the measurement target object to the dimension measuring apparatus, a position of the measurement target object in the image, and positions of the at least two feature points in the image;
• and
• measuring a length of a second surface of the measurement target object by changing a position of the dimension measuring apparatus.