Surgical camera system with automatic alternation between two depths of field

1. A surgical camera system comprising:

a tunable iris configured to automatically alternate between a first depth of field and a second depth of field larger than the first depth of field;

one or more lenses configured to collect light using the tunable iris; a body containing the tunable iris and at least a portion of the one or more lenses;

a sensor configured to produce images from the light received from the one or more lenses and the tunable iris;

a video processing unit configured to: produce a video stream at a frame rate that is greater than or equal to about 20 frames per second from first images and second images produced by the sensor from the light received from one or more lenses and the tunable iris, the first images acquired at the first depth of field and the second images acquired at the second depth of field; and adjust one or more lighting parameters of the first images and the second images prior to producing the video stream, the video stream comprising video frames that alternate between the first images acquired at the first depth of field and the second images acquired at the second depth of field; and,

a display device in communication with the video processing unit, the display device configured to render the video stream, the first depth of field and the second depth of field selected so that the video stream results in a three dimensional effect at the display device when the video stream is rendered thereon.

2. The surgical camera system of claim 1 , further comprising a video buffering unit configured to one or more of buffer and sequence the first images and the second images prior to being streamed by the video processing unit.

3. The surgical camera system of claim 1 , wherein the image stream comprises images acquired at the first depth of field and the second depth of field rendered in one or more given sequences.

4. The surgical camera system of claim 1 , wherein the first depth of field is in a range of about 5 mm to about 100 mm.

5. The surgical camera system of claim 1 , wherein the second depth of field is in a range of about 2 mm to about 80 mm.

6. The surgical camera system of claim 1 , wherein the second images have a smaller resolution than the first images.

7. The surgical camera system of claim 1 , further comprising a reference clock, the tunable iris configured to automatically alternate between the first depth of field and the second depth of field according to a time sequence generated using the reference clock.

8. The surgical camera system of claim 7 , wherein the first images and the second images are acquired in association with alternating pulses of the time sequence.

9. The surgical camera system of claim 1 , wherein the display device comprises a heads up display (HUD) device.

10. The surgical camera system of claim 1 , wherein the video processing unit is further configured to adjust one or more lighting parameters of the first images and the second images prior to producing the image stream by one or more of: balancing respective brightness of one or more of the first images and the second images; balancing respective gain values of one or more of the first images and the second images; and, performing brightness matching on one or more of the first images and the second images prior to producing the image stream.

11. The surgical camera system of claim 1 , wherein the body comprises a proximal end and a distal end, the distal end configured for positioning adjacent tissue being imaged by the one or more lenses and the tunable iris.

12. The surgical camera system of claim 1 , wherein the body is configured for use with a surgical port.

13. The surgical camera system of claim 1 , further comprising a tracking device configured to be tracked by a navigation system.