Ophthalmic illumination system with controlled chromaticity

1. An ophthalmic illumination system, comprising:

a supercontinuum laser configured to emit a white laser beam;

a first filter and a second filter arranged within an optical path of the white laser beam, wherein:

the first filter comprises a first unfiltered region configured to transmit visible light in a visible spectrum, a first filtered region configured to transmit visible light in a first spectral range, and a second filtered region configured to transmit visible light in a second spectral range;

the second filter comprises a second unfiltered region configured to transmit visible light in the visible spectrum, a third filtered region configured to transmit visible light in a third spectral range, and a fourth filtered region configured to transmit visible light in a fourth spectral range; and

the first filter and the second filter are independently moveable to adjust chromaticity of a light beam in a complementary or additive manner with each other;

a plurality of chromaticity sensors, each configured to:

receive a portion of the laser beam transmitted by the first and second filters; and

output a signal indicating a chromaticity value for the received portion of the beam; and

a processor configured to:

receive the signals output by the plurality of chromaticity sensors;

compare the indicated chromaticity values to one or more target chromaticity values stored in memory;

based on the comparison, adjust the chromaticity of the light beam transmitted by the filters by selecting the first and/or second filter to move and generating a signal to move the first and/or second filter such that the laser beam is partially incident on an unfiltered region and one of the filtered regions.

2. The ophthalmic illumination system of claim 1 , wherein the signal indicating a chromaticity value of the laser beam output by each chromaticity sensor corresponds to a value for an X-bar, Y-bar, or Z-bar tristimulus function.

3. The ophthalmic illumination system of claim 1 , wherein the first unfiltered region and the first filtered region are separated by a distinct boundary.

4. The ophthalmic illumination system of claim 3 , wherein the distinct boundary comprises a line nonperpendicular to a direction of motion of the first filter.

5. The ophthalmic illumination system of claim 1 , wherein the first unfiltered region and the first filtered region are separated by a gradient region which transitions from clear to the first filtered region.

6. The ophthalmic illumination system of claim 5 , wherein the gradient region is situated around a centerline extending nonperpendicular to a direction of motion of the first filter.

7. The ophthalmic illumination system of claim 1 , wherein the first or second filter is moved rotationally.

8. The ophthalmic illumination system of claim 1 , wherein the first or second filter is moved horizontally or vertically.

9. An ophthalmic illumination system, comprising:

a light source configured to emit a light beam;

a first filter comprising a first clear region configured to transmit visible light in a visible spectrum and a first filtered region configured to transmit visible light in a first spectral range, the filter arranged within an optical path of the light beam;

a second filter, independently movable from the first filter, wherein the second filter comprises a second clear region configured to transmit visible light in the visible spectrum and a second filtered region configured to transmit visible light in a second spectral range, the second filter arranged downstream of the first filter in the optical path of the light beam; and

a plurality of chromaticity sensors, each configured to:

receive a portion of the light beam transmitted by the first and second filters; and

output a signal indicating a chromaticity of the received portion of the light beam; and

a processor configured to:

receive the signal indicating a chromaticity of the light beam from the chromaticity sensors;

compare the indicated chromaticity of the light beam to a target chromaticity stored in memory; and

based on the comparison, adjust the chromaticity of the light beam transmitted by the first and second filters by selecting the first and/or second filter to move and generating a signal to move the first and/or second filter from a first position to a second position such that the first filter and the second filter adjust chromaticity of the light beam in a complementary or additive manner with each other.

10. The ophthalmic illumination system of claim 9 , wherein the signal indicating a chromaticity of the light beam output by each chromaticity sensor corresponds to a value for an X-bar, Y-bar, or Z-bar tristimulus function.

11. The ophthalmic illumination system of claim 9 , wherein the first clear region and the first filtered region are separated by a distinct boundary.

12. The ophthalmic illumination system of claim 11 , wherein the distinct boundary comprises a line nonperpendicular to a direction of motion of the filter.

13. The ophthalmic illumination system of claim 9 , wherein the first filter is moved rotationally.

14. The ophthalmic illumination system of claim 9 , wherein the first filter is moved horizontally or vertically.

15. The ophthalmic illumination system of claim 9 , wherein the light source is a supercontinuum laser configured to emit a white laser beam.

16. The ophthalmic illumination system of claim 9 , wherein the first spectral range includes wavelengths between 615 and 785 nm.

17. The ophthalmic illumination system of claim 9 , wherein the first spectral range includes wavelengths between 420 and 495 nm.

18. The ophthalmic illumination system of claim 9 , wherein the first filter further comprises a third filtered region configured to transmit visible light in a third spectral range.

19. An ophthalmic illumination system, comprising:

a supercontinuum laser configured to emit a white laser beam;

a first filter and a second filter arranged within an optical path of the white laser beam, wherein:

the first filter comprises a first unfiltered region configured to transmit visible light in a visible spectrum, a first filtered region configured to transmit visible light in a first spectral range, and a second filtered region configured to transmit visible light in a second spectral range;

the second filter comprises a second unfiltered region configured to transmit visible light in the visible spectrum, a third filtered region configured to transmit visible light in a third spectral range, and a fourth filtered region configured to transmit visible light in a fourth spectral range; and

the first filter and the second filter are independently moveable to adjust chromaticity of a light beam in a complementary or additive manner with each other;

a plurality of chromaticity sensors, each configured to:

receive a portion of the laser beam transmitted by the first and second filters; and

output a signal indicating a chromaticity value for the received portion of the beam; and

a processor configured to:

track cumulative operating time of the light source; and

based on the tracked cumulative operating time, adjust the chromaticity of the light beam transmitted by the first and second filters by selecting the first and/or second filter to move and generating a signal to move the first and/or second filter from a first position to a second position such that the first filter and the second filter adjust chromaticity of the light beam in a complementary or additive manner with each other.