Patent ID: 8767274
Filing Date: 2014-07-01
Classification: H04N

Abstract:
1. An image sensor unit for reading an illuminated object, the image sensor unit comprising: a light source including a light-emitting surface that emits light; a light guide including a substantially rod-shaped light emitter extending along a main scanning direction, the light guide guiding the light emitted from the light source to the illuminated object; a contact image sensor that receives light from the illuminated object and converts the light into an electric signal; a light condenser that focuses the light reflected from the illuminated object onto the contact image sensor; a circuit board extending along the main scanning direction, the light source and the contact image sensor being mounted to the circuit board; and a frame that accommodates the light guide, the light condenser, and the circuit board, wherein the light guide extends along the main scanning direction parallel to the contact image sensor, and wherein the light guide is positioned off-set in a direction along a sub scanning direction, which is perpendicular to the main scanning direction, from the light-emitting surface of the light source, so that a center line, extending parallel with the contact image sensor, of the light-emitting surface of the light source is closer to the contact image sensor than a center line, extending parallel with the contact image sensor, of the light emitter of the light guide.