Module of reflection mirrors of L-shape

Abstract

A module of reflection mirrors of L-shape according to the invention, arranged in an optical chassis of scanner, is comprised of a first L-shaped mirror and a second L-shaped mirror. The recession portions for the second L-shaped mirror and the first L-shaped mirror are corresponded to each other in the space. After entering the module with a specific angle, an incident light is reflected several times between the two L-shape mirrors before it leaves the module with another angle again. Wherein, there are a first reflection zone and a second reflection zone at the recession portion of the first L-shaped mirror, and there are a third reflection zone and a fourth reflection zone at the recession portion of the second L-shaped mirror. After entering the module with a specific angle, the incident light passes through the second reflection zone, the third reflection zone, the fourth reflection zone, the second reflection zone, the first reflection zone, the fourth reflection zone, and the third reflection zone in sequence to get an appropriate optical length. Then, the reflection light leaves the module of reflection mirrors of L-shape with another angle that is different from the entering angle and is then focused into an image on a CCD by a lens.

1. A module of reflection mirrors of L-shape is comprised of comprising:
 a first L-shaped mirror; and  
 a second L-shaped mirror, the wherein a recession portion of which is corresponded the second L-shaped mirror corresponds to that a recession portion of the first L-shaped mirror; 
 wherein, after entering into the module with a specific angle, the incident light is inter-reflected between the first L-shaped mirror and the second L-shaped mirror, and then leaves the module with another angle,;  
 wherein the recession portion of the first L-shaped mirror has a first reflection zone and a second reflection zone:; 
 wherein the recession portion of the second L-shaped mirror has a third reflection zone and a fourth reflection zone; and 
 wherein, after entering the module with a the specific angle, the incident light is reflected in sequence through the second reflection zone, the third reflection zone, the fourth reflection zone, the second reflection zone, the first reflection zone, the fourth reflection zone, and the third reflection zone, and finally leaves the module of reflection mirrors of L-shape with another angle that is different from the entering specific angle. 
 
     
     
       2. The module of reflection mirrors of L-shape according to  claim 1 , wherein the recession portion of the first L-shaped mirror has a first angle;, wherein the recession portion of the second L-shaped mirror has a second angle, and wherein different optical lengths may be obtained by changing the first angle. 
     
     
       3. The module of reflection mirrors of L-shape according to  claim 2 , wherein, after entering the module with a specific angle, the incident light is reflected in sequence through the second reflection zone, the third reflection zone, the fourth reflection zone, the second reflection zone, the first reflection zone, the fourth reflection, and the third reflection zone, and leaves the module of reflection mirrors of L-shape with an angle different from the entering angle. 
     
     
       4. The module of reflection mirrors of L-shape according to  claim 1 , wherein the first L-shaped mirror and the second L-shaped mirror are respectively formed into one body, and wherein each mirror is fixed at an appropriate position by a fixation seat. 
     
     
       5. The module of reflection mirrors of L-shape according to  claim 1 , wherein the first L-shaped mirror and the second L-shaped mirror are made of material comprised of metal. 
     
     
       6. The module of reflection mirrors of L-shape according to  claim 1 , wherein the recession portions of the first L-shaped mirror and the second L-shaped mirror are coated with a metal film. 
     
     
       7. A method, comprising:
 receiving incident light into a module with a specific angle;   inter-reflecting the incident light between a recession portion of a first L-shaped mirror and a recession portion of a second L-shaped mirror in sequence through a second reflection zone, a third reflection zone, a fourth reflection zone, the second reflection zone, a first reflection zone, the fourth reflection zone, and the third reflection zone, wherein the recession portion of the first L-shaped mirror includes the first and second reflection zones and the recession portion of the second L-shaped mirror includes the third and fourth reflection zones; and   outputting the inter-reflected light from the module with another angle that is different from the specific angle of the received incident light.   
     
     
       8. The method of claim 7, wherein the recession portion of the second L-shaped mirror corresponds to the recession portion of the first L-shaped mirror. 
     
     
       9. The method of claim 7, further comprising:
 radiating light from a light source toward a document;   reflecting light from the document to the module; and   with a lens, focusing the outputted light onto a charge-coupled device (CCD).   
     
     
       10. The method of claim 7, further comprising obtaining different optical lengths at least by changing a first angle of the recession portion of the first L-shaped mirror. 
     
     
       11. The method of claim 7, wherein the first L-shaped mirror and the second L-shaped mirror respectively comprise one body, and wherein the first L-shaped mirror and the second L-shaped mirror are fixed at an appropriate position by a fixation seat. 
     
     
       12. The method of claim 7, wherein the first L-shaped mirror and the second L-shaped mirror comprise a metal material. 
     
     
       13. The method of claim 7, wherein the recession portions of the first L-shaped mirror and the second L-shaped mirror comprise a metal film coating. 
     
     
       14. A module of reflection mirrors comprising:
 a first mirror; and   a second mirror, wherein a recession portion of the second mirror corresponds to a recession portion of the first mirror;   wherein the first and second mirrors are configured to receive light at a specific angle, inter-reflect incident light between the first mirror and the second mirror, and emit light from the module with another angle different from the specific angle;   wherein the recession portion of the first mirror includes a first reflection zone and a second reflection zone;   wherein the recession portion of the second mirror includes a third reflection zone and a fourth reflection zone; and   wherein the first and second mirrors are configured to reflect the incident light in sequence through the second reflection zone, the third reflection zone, the fourth reflection zone, the second reflection zone, the first reflection zone, the fourth reflection zone, and the third reflection zone before leaving the module.   
     
     
       15. The module of claim 14, wherein the recession portion of the first mirror includes a first angle, wherein the recession portion of the second mirror includes a second angle, and wherein the first and second mirrors are configured to form different optical lengths in response to changes in the first angle. 
     
     
       16. The module of claim 14, wherein the first mirror and the second mirror respectively comprise one body, and wherein the first mirror and the second mirror are fixed at an appropriate position by a fixation seat. 
     
     
       17. An apparatus, comprising:
 a light source;   an image sensor; and   an optical light path comprising two reflectors configured to reflect light radiated from the light source onto the image sensor, wherein each of the two reflectors are further configured to reflect the light a plurality of times before the light is reflected onto the image sensor, and wherein one of the two reflectors comprises:
 a first reflection zone configured to both reflect the light for a second time within the optical light path and reflect the light for a last time within the optical light path toward the image sensor; and 
 a second reflection zone configured to receive the light reflected directly from the first reflection zone. 
   
     
     
       18. The apparatus of claim 17, wherein an angle is formed between reflective surfaces of the first and second reflection zones. 
     
     
       19. The apparatus of claim 17, wherein at least one of the two reflectors comprises a third reflection zone and a fourth reflection zone, and wherein the optical light path is configured to reflect the light in sequence through the third reflection zone, the fourth reflection zone, and the second reflection zone before the light is reflected by the first reflection zone toward the image sensor. 
     
     
       20. The apparatus of claim 18, wherein the optical light path is configured to form different optical lengths in response to changes in the angle formed between the reflective surfaces of the first and second reflection zones. 
     
     
       21. The apparatus of claim 19, wherein a first angle is formed between reflective surfaces of the first and second reflection zones, and wherein a second angle is formed between reflective surfaces of the third and fourth reflection zones. 
     
     
       22. The apparatus of claim 21, wherein the first angle is different than the second angle.