System and method for removing speckle from a scene lit by a coherent light source
The disclosure extends to methods, devices, and systems for removing speckle from a coherent light source, such as laser light. The methods, devices, and systems help eliminate or reduce speckle introduced from a coherent light source, such as laser light, by utilizing the teachings and principles of the disclosure.
1. A system for removing speckle from an image frame of a surgical site comprising:
an imaging device comprising a CMOS image sensor, wherein the CMOS image sensor comprises a pixel array;
an endoscopic device;
a pulsing coherent light source for providing light to a surgical site, wherein the light source is pulsed at an interval that corresponds to the operation and functionality of the pixel array of the CMOS image sensor;
a control unit comprising circuitry for sending data to the CMOS image sensor and receiving data from the CMOS image sensor to create an image frame of the surgical site;
a display that allows a user to visualize the surgical site;
a fiber optic bundle connected to the coherent light source, the fiber optic bundle comprising a first fiber optic bundle and a second fiber optic bundle coupled at a junction; and
a vibrating mechanism including a vibrating device disposed in a cavity formed in a connector attached to the fiber optic bundle proximal to the junction where the first fiber optic bundle and the second fiber optic bundle are coupled by the connector, wherein the vibrating mechanism is the only vibrating mechanism coupled along a path of the first fiber optic bundle and the second fiber optic bundle that vibrates both the first fiber optic bundle and the second fiber optic bundle and causes the light to lose coherence momentarily as the geometry of its path is changed by vibration;
wherein the coherent light source pulses light in a plurality of electromagnetic partitions, such that the pixel array receives electromagnetic energy and produces a data set that corresponds in time with each specific electromagnetic partition.
2. The system of claim 1 , wherein the introduction of a vibration stimulus to the fiber optic bundle introduces a series of changes in path geometry.
3. The system of claim 2 , wherein the series of changes are performed at a high frequency so that the observable speckle pattern is substantially removed, such that a human eye cannot detect the speckle pattern when the video is output to the display.
4. The system of claim 1 , wherein the imaging device is in electronic communication with the control unit.
5. The system of claim 1 , wherein the connector includes a sleeve.
6. The system of claim 5 , wherein the vibrating device is selected from a group consisting of a small mechanical motor, a piezoelectric crystal, an oscillator, and a resonator component.
7. The system of claim 5 , wherein the sleeve is a plurality of sleeves comprising a first sleeve and a second sleeve for attaching to the first fiber optic bundle and the second fiber optic bundle respectively.
8. The system of claim 1 , wherein the CMOS image sensor is a monochromatic CMOS image sensor.
9. The system of claim 1 , wherein the coherent light source is a pulsing laser light source for use in illuminating an object and producing an image in a light deficient environment.
10. The system of claim 1 , wherein the CMOS image sensor is a monochromatic CMOS image sensor that is sensitive to electromagnetic radiation of any wavelength, and wherein coherent light source is a laser light source that emits a plurality of electromagnetic partitions.
11. The system of claim 10 , wherein the data set created by the monochromatic CMOS image sensor for an individual pulse of light is assigned a specific color partition, wherein the assignment is based on the timing of the pulsed color partition from the coherent light source.
12. The system of claim 11 , wherein the data sets are used to reconstruct an image by combining the data sets.
13. The system of claim 10 , wherein the electromagnetic partitions comprise all visible and non-visible wavelengths and the electromagnetic partitions are pulsed in a known, sequence.