Patent ID: 6674560
Filing Date: 2004-01-06
Classification: G02B

Abstract:
An objective compound lens, applied to an optical scanner having at least a light source, a reflection compound mirror and an optical sensor, wherein the light source is used to radiate a document to obtain an image light, the reflection compound mirror is located in an optical path of the image light to project the image light on the optical sensor, and the objective compound lens is located between the optical path of the image light between the optical sensor and the reflection compound mirror, the objective compound lens comprising:a basic objective lens; a mounting seat; and a plurality of compound lenses, only one of which is suited for connecting and detaching with the mounting seat, wherein when only one of the compound lenses is selected to be allocated on the mounting seat, the optical scanner has a resolution corresponding to the selected compound lens, and when any one of the compound lenses is not connected to the mounting seat, the image light is projected on the optical sensor via the basic object lens only.