Position sensing apparatus, image forming apparatus, and position detection method

An image forming apparatus comprising:

• a position sensing apparatus including
• a scanner configured to emit light to an object to scan an image of the object, and
• a position detector;
• and
• an image forming device configured to form an image based on an invisible alignment image detected by the position detector,
• wherein the scanner is configured to output a first result of scanning obtained by irradiating the object with visible light and a second result of scanning obtained by irradiating the object with invisible light to the position detector, and
• wherein the position detector is configured to correct the second result of scanning, based on the first result of scanning, and to detect the invisible alignment image based on the corrected second result of scanning.

A method of detecting a position, the method comprising:

• emitting light to an object using a scanner;
• obtaining a first result of scanning as the scanner irradiates the object with visible light;
• obtaining a second result of scanning as the scanner irradiates the object with invisible light;
• correcting the second result of scanning based on the first result of scanning, using a position detector;
• and
• detecting an invisible alignment image based on the corrected second result of scanning, using the position detector.