Method and apparatus for measuring toner concentration

1. A toner concentration measuring device, comprising:

a selector that selects a type of developer material to be measured;

a sensor that detects an amount of light reflected off a developer material;

a controller that determines a value corresponding to a toner concentration of the developer material based on the amount of light detected by the sensor;

a fiber optic bundle assembly that includes at least one emitter fiber, and at least one detector fiber, wherein the emitter fiber is coupled to a light source and the detector fiber is coupled to the sensor; and

an enclosure that receives at least a portion of the optic bundle assembly, the enclosure including a transparent window in which the light emitted from the emitter fiber is transmitted through the window and the light received through the window is transmitted to the detector fiber.

2. The toner concentration measuring device of claim 1 , further comprising:

a light source that emits light on the developer material.

3. The device of claim 2 , wherein the light source emits diffused light.

4. The toner concentration measuring device of claim 1 , further comprising:

a memory that stores at least one toner concentration value corresponding to the amount of light received by the sensor, and

the controller retrieving the toner concentration value from the memory based on the amount of light received by the sensor.

5. The device of claim 1 , wherein the fiber optic bundle assembly including a plurality of emitter fibers and a plurality of detector fibers, wherein the emitter fibers and the detector fibers are randomized so that emitter fibers and the detector fibers are uniformly distributed throughout an end of the fiber bundle assembly.

6. The device of claim 1 , wherein the window is oriented at substantially 45 degrees to the fiber optic bundle assembly.

7. The device of claim 1 , further comprising an amplifier coupled to the sensor, wherein the amplifier is configured to control a gain of the sensor.

8. The device of claim 1 , wherein the device is portable.

9. A method for measuring toner concentration, comprising:

accepting a user input for a type of developer material to be measured;

adjusting gain and/or offset parameters for the type of developer material to be measured;

detecting an amount of reflected light off a developer material; and

determining a value corresponding to a toner concentration of the developer material based on the amount of light detected.

10. The method of claim 9 , further comprising:

emitting light to the developer material.

11. The method of claim 9 , further comprising:

storing at least one toner concentration value corresponding to the amount of received light; and

outputting the toner concentration value if a detected light is substantially the amount of light that corresponds to the toner concentration value.

12. A computer readable medium or a modulated signal being encoded to perform the method of claim 11 .

13. A computer readable medium or a modulated signal being encoded to perform the method of claim 9 .

14. A toner concentration measuring device, comprising:

means for accepting a user input for a type of developer material to be measured;

means for adjusting gain and/or offset parameters for the type of developer material to be measured;

means for detecting an amount of reflected light off a developer material; and

means for determining a value corresponding to a toner concentration of the developer material based on the amount of light detected.

15. The toner concentration measuring device of claim 14 , further comprising:

means for storing at least one toner concentration value corresponding to the amount of received light.