Abstract: A mirror holding apparatus, disposed in a chassis of a scanner, is disclosed. The mirror holding apparatus includes two opposite holding bases and more than one pair of holding plates, for holding the mirror and providing various angles or directions of inclination of the mirror. The pairs of holding plates are not parallel to any other. When the light reflected from the mirror on one pair of holding plates deviates from the original optical path. A substitute mirror hanging at the substitute pair of holding plate can be used to adjust the deviated optical path. Therefore, the wasting of material is avoided and the time and labor for producing a new holding base is saved.

Abstract: A lens module includes a non-cylinder lens and a clamping apparatus. The clamping apparatus includes a base, two side parts, and a top part. Two side parts are disposed on two ends of the base to form a containing trough for holding the lens. One end of the top part is connected to one side part and the other end is fixed on the other side part. Two screw holes on the top part allow two adjusting screws to be screwed into for pressing the lens. Two elastic devices provide the elasticity between the lens and the base and the relative height of two sides of the lens is adjusted by turning the two adjusting screws.