Patent ID: 9699341
Date: 2017-07-04
CPC Classifications: H04N

Claim:
1. An image reading apparatus comprising: an image sensor comprising: wherein the light source is configured to transmit light to an original document that is located at a plurality of locations different in a direction of a depth of field of the photodetector, wherein the photodetector is configured receive light reflected from the original document, wherein the image reading apparatus further comprises a fixing unit comprising a spacer, wherein the fixing unit is configured to adjust a position of the image sensor so that the photodetector is mounted within the image reading apparatus at a position wherein a focal point of the photodetector is located between a minimum distance and a maximum distance from a light incident surface of the photodetector to the original document, wherein the photodetector is configured to receive light reflected from the original document in a first reading mode wherein the original document is located on a document platen while the image sensor is moving, wherein the photodetector is configured to receive light reflected from the original document in a second reading mode wherein the original document is moved and lifted by a spacing from the document platen while the image sensor remains fixed, and wherein a location of the original document in the first reading mode is at the minimum distance and a location of the original document in the second reading mode is at the maximum distance.