Solid state variable direction of view endoscope

• US 10,092,169 B2
• Filed: 11/11/2014
• Issued: 10/09/2018
• Est. Priority Date: 07/08/2008
• Status: Active Grant

• Current Assignee: Karl Storz Imaging, Inc (Karl Storz Se & Co. Kg)
• Original Assignee: Karl Storz Imaging, Inc (Karl Storz Se & Co. Kg)
• Inventors: Hale, Eric L., Hoeg, Hans David, Duckett, III, George E., Schara, Nathan Jon
• Primary Examiner(s): Newton, Alexandra L
• Assistant Examiner(s): Wu, Pamela F
• Application Number:
  US14/538,308
• Publication Number:
  US 20150065799A1
• Time in Patent Office: 1,428 Days
• Field of Search: 600176
• CPC Class Codes: A61B 1/00006 of control signals
• CPC Class Codes: A61B 1/00009 of image signals during a use of endoscope
• CPC Class Codes: A61B 1/00039 provided with input arrangements for the user
• CPC Class Codes: A61B 1/0005 combining images e.g. side-by-side, superimposed or tiled
• CPC Class Codes: A61B 1/00096 Optical elements
• CPC Class Codes: A61B 1/00177 for 90 degrees side-viewing
• CPC Class Codes: A61B 1/00179 for off-axis viewing
• CPC Class Codes: A61B 1/00183 for variable viewing angles
• CPC Class Codes: A61B 1/00188 with focusing or zooming features
• CPC Class Codes: A61B 1/042 characterised by a proximal camera, e.g. a CCD camera
• CPC Class Codes: G02B 23/243 Objectives for endoscopes
• CPC Class Codes: G02B 23/2484 Arrangements in relation to a camera or imaging device processing or control of video signals generated by an endoscope H04N23/60, H04N23/70
• CPC Class Codes: H04N 23/555 for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes

Abstract

An endoscope with a wide angle lens that comprises an optical axis that is angularly offset from a longitudinal axis of the endoscope such that the optical axis resides at an angle greater than zero degrees to the longitudinal axis. The wide angle lens system simultaneously gathers an endoscopic image field, the endoscopic image field at least spanning the longitudinal axis and an angle greater than ninety degrees to the longitudinal axis. The endoscope includes an optical lens system to at least partially even out the information density across an imaging surface area of the imager.

Claims

1. An endoscope, comprising:

a lens system that comprises an optical axis that is angularly offset from a longitudinal axis of the endoscope where the optical axis resides at an angle greater than zero degrees to the longitudinal axis;

said lens system simultaneously gathering an image field spanning the longitudinal axis and an angle greater than ninety degrees to the longitudinal axis;

an imager having an imaging surface area, said imager receiving at least a portion of the image field and producing an output signal related to the image field;

imaging circuitry that receives the output signal and produces an image signal;

image selecting circuitry that receives the image signal and produces a region of interest signal that corresponds to a region of interest field that is less than the image field; and

an interface that enables a user to input an adjustment to the region of interest and produces an adjustment signal that expands the region of interest by incorporating pixels that reside outside an original area of the region of interest into the region of interest signal;

wherein said lens system at least partially redistributes the image field to even out an information density across the imaging surface area.

2. The endoscope of claim 1, wherein said lens system includes a wide-angle lens, said wide-angle lens at least partially redistributing the image field to even out the information density across the imaging surface area.

3. The endoscope of claim 1, where said interface enables the user to rotate the image formed by the region of interest signal.

4. The endoscope of claim 1, where said image selecting circuitry rotates the image formed by the region of interest signal.

5. The endoscope of claim 4, where the rotation of the image is about the optical axis.

6. The endoscope of claim 1, further comprising video processing circuitry that generates a combined video signal comprising a first frame displaying a region of interest video signal and a second frame displaying an all image video signal.

7. The endoscope of claim 1, where a longitudinal direction of the imager spans a diameter of the image field.

8. The endoscope of claim 1, where the imaging surface area is rectangular and comprises a longitudinal dimension that is aligned with a longitudinal dimension of the image field.

9. The endoscope of claim 1, where the imaging surface area is square, circular, or oval.

10. The endoscope of claim 1, wherein the imaging surface area has an HD aspect ratio of 16:

9.

11. The endoscope of claim 1, further comprising an image transmission system.

12. The endoscope of claim 11, wherein said image transmission system at least partially redistributes the image field to even out the information density across the imaging surface area.

25. The endoscope of claim 1, wherein the adjustment signal incrementally expands the region of interest by incorporating pixels that reside outside the original area of the region of interest into the region of interest signal.

26. The endoscope of claim 1, wherein the adjustment signal expands the region of interest by incorporating pixels that longitudinally reside above the original area of the region of interest into the region of interest signal.

13. An endoscope, comprising:

an optical system, the optical system including a wide-angle lens system, the wide-angle lens system having an optical axis that is angularly offset from a longitudinal axis of the endoscope such that the optical axis resides at an angle greater than zero degrees to the longitudinal axis, wherein the wide-angle lens system simultaneously gathers light rays from an endoscopic image field, the endoscopic image field at least spanning the longitudinal axis and an angle greater than ninety degrees to the longitudinal axis;

an imager comprising an imaging surface area that receives only a portion of an endoscopic image transmitted by the wide-angle lens system and produces output signals corresponding to the endoscopic image field;

image forming circuitry that receives the output signal and produces an image signal;

image selecting circuitry that receives the image signal and produces a region of interest signal that corresponds to a region of interest field that is less than the image field; and

an interface that enables a user to input an adjustment to the region of interest and produces an adjustment signal that expands the region of interest by incorporating pixels that reside outside an original area of the region of interest into the region of interest signal;

wherein said optical system at least partially redistributes the image field to even out an information density across the imaging surface area.

14. The endoscope of claim 13, further comprising image control circuitry that receives a region of interest field selection from the interface and produces a field control signal identifying the region of interest field;

wherein the image selecting circuitry receives the field control signal and produces the region of interest signal in accordance with the field control signal.

15. The endoscope of claim 14, wherein the interface enables the user to select at least one preset standard endoscopic viewing angle and instructs the image control circuitry to generate a field control signal in accordance with that selection.

16. The endoscope of claim 13, further comprising an image transmission system.

17. The endoscope of claim 16, wherein said image transmission system at least partially redistributes the image field to even out the information density across the imaging surface area.

18. An endoscope, comprising:

a shaft comprising a proximal end and a distal end and a longitudinal axis spanning the proximal end and the distal ends, the distal end of the shaft being flexible;

a handle coupled to the proximal end of the shaft;

a wide-angle lens disposed in the distal end of the shaft, the wide-angle lens gathering an endoscopic image field, said wide-angle lens comprises having an optical axis that is angularly offset from a longitudinal axis of the endoscope such that the optical axis resides at an angle greater than zero degrees to the longitudinal axis;

a solid state imager comprising an imaging surface area that receives at least a portion of an endoscopic image transmitted by the wide-angle lens and produces output signals corresponding to the endoscopic image field, the solid state imager disposed in the distal end of the shaft, the wide-angle lens being disposed distally to the solid state imager;

image selecting circuitry that receives the image signal and produces a region of interest signal that corresponds to a region of interest field that is less than the image field; and

an interface that enables a user to input an adjustment to the region of interest and produces an adjustment signal that expands the region of interest by incorporating pixels that reside outside an original area of the region of interest into the region of interest signal;

wherein the wide-angle lens simultaneously gathers the endoscopic image field at least spanning the longitudinal axis and an angle greater than ninety degrees to the longitudinal axis.

19. The endoscope of claim 18, further comprising:

image forming circuitry that receives the output signal and produces an image signal;

image control circuitry that receives a region of interest field selection from the interface and produces a field control signal identifying the region of interest field;

wherein the image selecting circuitry receives the field control signal and produces the region of interest signal in accordance with the field control signal;

wherein the region of interest field corresponds to a standard endoscopic viewing angle.

20. The endoscope of claim 19, wherein the interface enables the user to select at least one preset standard endoscopic viewing angle and instructs the image control circuitry to generate the field control signal in accordance with that selection.

21. The endoscope of claim 19, wherein the interface enables the user to select a progressive adjustment and produces an adjustment signal that incrementally alters the region of interest.

22. The endoscope of claim 21, wherein the adjustment signal incrementally alters the viewing angle above or below the at least one preset standard endoscopic viewing angle.

23. The endoscope of claim 21, wherein the adjustment signal incrementally expands the region of interest by incorporating pixels that longitudinally reside above the original area of the region of interest and incorporating these pixels into the region of interest signal.

24. The endoscope of claim 18, further comprising an image transmission system, the image transmission system at least partially redistributing the image field to even out the information density across the imaging surface area.