Light source modulation for a scanning microscope

1. An imaging system for imaging an object, comprising:

a scanner, wherein the scanner positions a spot of light from a light source on the object along a scanning path, the scanning path includes a plurality of scan lines, wherein the spot moves along the scanning path at a scanning velocity, wherein the scanning velocity is not constant;

a detector arranged to output data associated with positions along the scanning path; and

one or more processors that perform calculations comprising:

calculating pixels based on the output data; and

constructing an image of the object based on the pixels;

wherein, intensity of the spot of light is modulated as a function of the scanning velocity during a first window, and the intensity of the spot of light is substantially zero outside of the first window.

2. The imaging system of claim 1 , further comprising an external modulator for modulating the light source.

3. The imaging system of claim 1 , wherein the light source is directly modulated.

4. The imaging system of claim 1 , further comprising calculating the pixels by integrating the intensity of the detected light.

5. The imaging system of claim 1 , wherein the intensity of the spot of light is modulated as a function of the average scanning velocity.

6. The imaging system of claim 5 , wherein the average scanning velocity is averaged over a period equal to the pixel clock time.

7. The imaging system of claim 1 , wherein the scanner is a resonant scanner that positions the spot of light with sinusoidal motion; and

wherein constructing the image further comprises correcting image distortion caused by the sinusoidal motion by integration.

8. An imaging method for imaging an object, comprising:

scanning a spot of light from a light source on the object along a scanning path, the scanning path includes a plurality of scan lines, wherein the spot moves along the scanning path at a scanning velocity, wherein the scanning velocity is not constant;

modulating intensity of the spot of light as a function of the scanning velocity during a first window, and the intensity of the spot of light is substantially zero outside of the first window;

detecting output data associated with positions along the scanning path;

calculating pixels based on the output data; and

constructing an image of the object based on the pixels.

9. A non-transitory computer readable medium encoded with instructions for imaging an object, comprising:

sending instructions to a scanner to scan a spot of light from a light source on the object along a scanning path, the scanning path includes a plurality of scan lines, wherein the spot moves along the scanning path at a scanning velocity, wherein the scanning velocity is not constant;

sending instructions to modulate intensity of the spot of light as a function of the scanning velocity during a first window, and the intensity of the spot of light is substantially zero outside of the first window;

receiving output data from a detector, the output data associated with positions along the scanning path;

calculating pixels based on the output data; and

constructing an image of the object based on the pixels.

10. The imaging system of claim 1 , wherein the first window is a data sampling window used for constructing the image.

11. The imaging system of claim 1 , wherein the object is a fundus.

12. The imaging system of claim 1 , wherein the intensity of the spot of light is modulated so that the intensity of the spot of light at an edge of the first window gets less laser power and the intensity of the spot of light at a center of the first window gets more laser power.

13. The imaging system of claim 1 , wherein the scanner rotates around a predetermined axis.