Mini-scope for multi-directional imaging

• US 8,358,462 B2
• Filed: 11/15/2010
• Issued: 01/22/2013
• Est. Priority Date: 06/05/2007
• Status: Active Grant

• Current Assignee: SARCOS LC (Sarcos Technology & Robotics Corp.)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Jacobsen, Stephen C., Marceau, David, Smith, Fraser
• Primary Examiner(s): NGUYEN, THONG Q
• Application Number:
  US12/946,442
• Publication Number:
  US 20110286089A1
• Time in Patent Office: 799 Days
• Field of Search: 359/363, 359/367, 359399-431, 359/618, 359/634, 359483-502, 359/589
• US Class Current: 359/367
• CPC Class Codes: A61B 1/00181 for multiple fixed viewing angles A61B1/00193 takes precedence
• CPC Class Codes: A61B 1/00183 for variable viewing angles
• CPC Class Codes: A61B 1/05 characterised by the image sensor, e.g. camera, being in the distal end portion
• CPC Class Codes: G02B 23/2423 of the distal end
• 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: G02B 27/141 using dichroic mirrors
• CPC Class Codes: G02B 27/283 used for beam splitting or combining
• 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

A mini-scope for multi-directional imaging is disclosed. The mini-scope includes an elongated mini-scoped body. An emissions aperture is disposed on the distal end of the elongated mini-scope body, which can be configured to emit a beam of optical energy propagating through a flexible optical conductor. A selective mirror is also positioned at the distal end of the elongated mini-scope body and is configured to selectively pass or reflect the beam of optical energy based on the optical characteristics of the beam. A solid state imaging device is further disposed on the distal end of the elongated mini-scope body for imaging illumination reflected by an external object in response to the beam of optical energy. This illumination is directed to pass through or reflect from the selective mirror to the camera based on optical characteristics of the beam.

Claims

1. A mini-scope for multi-directional imaging, comprising:

an elongated body having a distal end and a proximal end;

means for propagating a single beam of optical energy from the distal end of the elongate body;

at least two selective mirrors disposed at the distal end of the elongated body and along an optical path of the beam, the mirrors being configured to selectively and differentially pass and reflect different portions of the beam of optical energy based on optical characteristics of the beam of optical energy, wherein the at least two selective mirrors are configured transverse to one another; and

a solid state imaging device adapted to image illumination reflected by an external object from the beam of optical energy, the illumination having passed through or reflected from one of the at least two selective mirrors to the solid state imaging device.

2. The mini-scope of claim 1, wherein at least one of the selective mirrors is a dichroic mirror.

3. The mini-scope of claim 1, wherein the optical characteristics of the beam include frequency characteristics.

4. The mini-scope of claim 1, wherein at least one of the selective mirrors is a polarizing beam splitter plate.

5. The mini-scope of claim 4, further comprising a flexible optical conductor which comprises a polarization maintaining optical fiber.

6. The mini-scope of claim 4, wherein the polarizing beam splitter plate further comprises:

a one-way mirror portion, having opposing reflecting and nonreflecting faces, configured to pass or reflect the illumination towards the solid state imaging device, based on directional characteristics of the illumination.

7. The mini-scope of claim 1, wherein the optical characteristics of the beam include polarization characteristics.

8. The mini-scope of claim 1, wherein the at least two selective mirrors are configured to reflect different portions of the beam of optical energy in at least two different directions, based on the optical characteristics of the beam.

9. The mini-scope of claim 1 further comprising a rotating device coupled to the selective mirror.

10. The mini-scope of claim 1, further comprising:

at least one light source disposed at the proximal end of the elongated mini-scope body for transmitting the beam of optical energy down a flexible optical conductor;

a processing system, in communication with the solid state imaging device, having imaging software for processing and displaying images recorded by the solid state imaging device; and

at least one display for displaying the images recorded by the solid state imaging device.

11. The mini-scope of claim 10, wherein the at least one light source is configured to alternately transmit a first beam of optical energy having a first predefined optical characteristic and a second beam of optical energy having a second predefined optical characteristic, wherein the second predefined optical characteristic is different from the first predefined optical characteristic and wherein the imaging software is configured to display images illuminated with the first beam of optical energy on a first display and display images illuminated with the second beam of optical energy on a second display.

12. The mini-scope of claim 10, wherein the at least one light source is configured to simultaneously transmit a first beam of optical energy having a first predefined optical characteristic and a second beam of optical energy having a second predefined optical characteristic, wherein the second predefined optical characteristic is different from the first predefined optical characteristic.

13. The mini-scope of claim 12, wherein the imaging software is configured to selectively filter and display images illuminated with the first beam of optical energy on a first display and images illuminated with the second beam of optical energy on a second display.

14. A mini-scope having multi-directional imaging capabilities, comprising

means for optically conducting a beam of optical energy, said means having a distal end and a proximal end;

means for propagating the beam of optical energy from the distal end of the means for optically conducting;

at least two selective mirrors disposed at the distal end of the mini-scope and along an optical path of the beam of optical energy, the mirrors being configured to selectively and differentially pass and reflect the beam of optical energy based on optical characteristics of the beam of optical energy, wherein the at least two selective mirrors are configured transverse to one another; and

means for imaging optical energy reflected from the target, said means disposed about the distal end of the mini-scope.

15. The mini-scope of claim 14, wherein the select mirrors are chosen from the group consisting of a dichroic mirror, a polarizing beam splitter plate, a polarizing beam cube, and a prism.

16. The mini-scope of claim 14, further comprising:

at least one light source disposed at the proximal end of the means for optically conducting the beam of optical energy;

a processing system, in communication with the means for imaging, having imaging software for processing and displaying images recorded by the means for imaging; and

at least one display for displaying the images recorded by the means for imaging.