Optical lens of optical scanner

Abstract

An optical scanner that may assemble the lens design for varying the focus and resolution, having a light source, a reflection compound mirror, a charge coupled device, a basic objective lens and a compound lens. The basic objective lens is designed by simulation software. According to the lens design theory, the compound lens is designed. By incorporating the basic objective lens and the compound lens, different resolutions such as 1200 dpi, 1600 dpi and 2400 dpi of the optical scanner are obtained without redesigning the lens device, the current specification of the optical scanner is also varied.

1. 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  illuminate a document to obtain an image light, the reflection compound  mirror is located in an optical path of the image light to protect the image light on the optical sensor, and the objective compound lens is located between  on 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; and  
 a mounting seat; and 
 a plurality of compound lenses, only one of which is suited for connecting and detaching with the mounting seat,a mounting seat configured to releasably couple a compound lens thereto, the mounting seat configured to support and fix the compound lens in alignment with the basic objective lens when the compound lens is releasably coupled thereto, wherein when only one of  the compound lenseslens is selected to be allocated onreleasably coupled to the mounting seat, the optical scanner has a resolution corresponding to the selectedreleasably coupled compound lens, and when any one of  the compound lenseslens is not connectedcoupled to the mounting seat, the image light is projected on the optical sensor via the basic objectobjective lens only.  
 
     
     
       2. The optical  objective compound lens according to  claim 1 , wherein when the selected  compound lens is coupled to the mounting seat, the compound lens is located on the optical path of the image light between the basic objective lens and the reflection compound  mirror. 
     
     
       3. The optical  objective compound lens according to  claim 1 , wherein when the selected  compound lens is coupled to the mounting seat, the compound lens is allocated on the mounting seat, separating from  non- contacting with  the basic objective lens. 
     
     
       4. An optical scanner, comprising:
   a basic objective lens positioned to receive light and to project the received light onto an optical sensor; and        a mounting seat configured to releasably couple a compound lens thereto, the mounting seat configured to support and fix the compound lens in alignment with the basic objective lens when the compound lens is releasably coupled thereto, wherein when the compound lens is releasably coupled to the mounting seat the light passes through both the basic objective lens and the compound lens before being projected onto the optical sensor, and when the compound lens is not coupled to the mounting seat the light does not pass through the compound lens before being projected onto the optical sensor.     
     
     
       5. The optical scanner of  claim 4 , wherein the optical scanner is configured to scan objects according to a first resolution range when the compound lens is releasably coupled to the mounting seat, and the optical scanner is configured to scan the objects according to a second resolution range when the compound lens is not coupled to the mounting seat, wherein the second resolution range is different than the first resolution range. 
     
     
       6. The optical scanner of  claim 4 , wherein when the compound lens is releasably coupled to the mounting seat, the compound lens is non- contacting with the basic objective lens.   
     
     
       7. The optical scanner of  claim 4 , wherein when the compound lens is releasably coupled to the mounting seat, a distance between the compound lens and the basic objective lens is fixed. 
     
     
       8. The optical scanner of  claim 4 , wherein when the compound lens is releasably coupled to the mounting seat, a position of the compound lens is fixed and non- moving relative to the basic objective lens.   
     
     
       9. An optical scanner, comprising:
   means for focusing light to be projected onto an optical sensor; and        means for mounting a compound light focusing component in alignment with the light focusing means, wherein the means for mounting is configured to releasably affix the compound light focusing component thereto, such that the mounted compound light focusing component is readily interchangeable with other compound light focusing components;        wherein the means for mounting is positioned in the optical scanner, such that when the compound light focusing component is releasably affixed to the means for mounting the light is focused by both the means for light focusing and the compound light focusing component before being projected onto the optical sensor, and when the compound light focusing component is not affixed to the means for mounting, the light is focused by the means for light focusing and not the compound light focusing component.     
     
     
       10. The optical scanner of  claim 9 , wherein the optical scanner is configured to scan objects according to a first resolution range when the compound light focusing component is releasably affixed to the means for mounting, and the optical scanner is configured to scan the objects according to a second different resolution range when the compound light focusing component is not affixed to the means for mounting. 
     
     
       11. The optical scanner of  claim 10 , wherein the optical scanner is configured to scan the objects according to a third resolution range when another compound light focusing component is releasably affixed to the means for mounting.