Stereo endoscope

• US 4,862,873 A
• Filed: 05/26/1988
• Issued: 09/05/1989
• Est. Priority Date: 05/27/1987
• Status: Expired due to Fees

• Current Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Original Assignee: Olympus Optical Company Ltd. (Olympus Corporation)
• Inventors: Nonami, Tetsuo, Kikuchi, Kenichi, Suzuki, Hiromasa, Hibino, Hiroki, Tsuruoka, Takao, Sasaki, Masahiko, Uehara, Masao, Yajima, Akihiko, Tsukaya, Takashi
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US07/199,212
• Time in Patent Office: 467 Days
• Field of Search: 128/3, 128/4, 128/5, 128/6, 128/7, 128/8, 358/98, 350/515, 350/516, 350/517, 350/96.19, 350/96.26
• US Class Current: 600/111
• CPC Class Codes: A61B 1/00165 with light-conductive means, e.g. fibre optics A61B1/07 takes precedence
• CPC Class Codes: A61B 1/00193 adapted for stereoscopic vision
• CPC Class Codes: A61B 1/042 characterised by a proximal camera, e.g. a CCD camera
• CPC Class Codes: A61B 1/0646 with illumination filters
• CPC Class Codes: A61B 1/0655 Control therefor
• CPC Class Codes: A61B 1/0669 at proximal end of an endoscope
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: G02B 23/2415 Stereoscopic endoscopes
• CPC Class Codes: H04N 13/10 Processing, recording or transmission of stereoscopic or multi-view image signals
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/167 Synchronising or controlling image signals
• CPC Class Codes: H04N 13/189 Recording image signals; Reproducing recorded image signals
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/254 in combination with electromagnetic radiation sources for illuminating objects
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• 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 apparatus is disclosed which includes a first and a second optical guides inserted in an elongated insertion portion thereof, and which can transmit an optical image, and an optical system with a function of imaging at the end surface of the optical guide. By transmitting an illuminating light from the other end surface to the portion to be observed through one of the optical guides, the portion to be observed is illuminated. While, the optical image transmitted through the other optical guide is introduced into an ocular system or an imaging system. By changing the functions performed by these optical guides, the stereoscopic observation and stereoscopic imaging can be realized.

Claims

1. A stereo endoscope apparatus comprising:

an elongated insertion portion;

first and second optical guide means inserted into said insertion portion, and through which an optical image can be transmitted;

a lens system for imaging said optical image at each front end surface of said first and second optical guides disposed at the front end of said insertion portion;

light output means for outputting illuminating light to the other end surfaces of said first and second optical guides;

imaging means for imaging said optical image transmitted to the other end surfaces of said first and second optical guides; and

illuminating/imaging control means for introducing said optical image transmitted through one of said guide means to said imaging means when said illuminating light output from said light output means is supplied to the other end of said first or second optical guide means.

3. A stereo endoscope apparatus according to claim 1 or 2, wherein said optical guide means comprises a fiber bundle.

4. A stereo endoscope apparatus according to claim 1 or 2, wherein said optical guide means comprises a relay optical system in which a plurality of lenses are longitudinally disposed.

5. A stereo endoscope apparatus according to claim 1 or 2, wherein said optical guide means comprises a refractive index gradient type of lens.

6. A stereo endoscope apparatus according to claim 1 or 2, wherein said light output means comprises a lamp outputting white light.

7. A stereo endoscope apparatus according to claim 1 or 2, wherein said light output means comprises a face-successive light output means for successively outputting light beams of a plurality of wave ranges.

8. A stereo endoscope apparatus according to claim 1 or 2, wherein said light output means is able to selectively output said white light and said face-successive light which successively outputs light beams of a plurality of wave ranges.

9. A stereo endoscope apparatus according to claim 1 or 2, wherein said light output means comprises two light source lamps.

10. A stereo endoscope apparatus according to claim 1 or 2, wherein said light output means comprises a single light source lamp.

11. A stereo endoscope apparatus according to claim 1, wherein said imaging means comprises an imaging optical system and an imaging element.

12. A stereo endoscope apparatus according to claim 1, wherein said imaging means comprises two imaging optical systems and two imaging elements.

13. A stereo endoscope apparatus according to claim 1, wherein said imaging means comprises a single imaging element.

14. A stereo endoscope apparatus according to claim 1, wherein said imaging means comprises an imaging element provided with a color filter.

15. A stereo endoscope apparatus according to claim 1, wherein said imaging means comprises an imaging element having no color filter.

16. A stereo endoscope apparatus according to claim 1, wherein means for branching light is provided between said optical guide means and said imaging means.

17. A stereo endoscope apparatus according to claim 16, wherein an image guide is provided between said means for branching light and said imaging element.

18. A stereo endoscope apparatus according to claim 16, wherein a light guide is provided in such a manner that one front end surface thereof confronts said means for branching light.

19. A stereo endoscope apparatus according to claim 1, wherein said imaging means is detachably provided for said optical guide means.

20. A stereo endoscope apparatus according to claim 1, wherein said imaging means is integrally formed with said optical guide means.

25. A stereo endoscope apparatus according to claim 1, wherein said imaging means is provided separately from said light output means.

26. A stereo endoscope apparatus according to claim 1, wherein said imaging means is accommodated in one housing together with said light output means.

2. A stereo endoscope apparatus comprising:

an elongated insertion portion;

first and second optical guide means inserted into said insertion portion, and through which an optical image can be transmitted;

a lens system for imaging the optical image at each front end surface of said first and second optical guides disposed at the front end of said insertion portion;

light output means for outputting illuminating light to the other end surfaces of said first and second optical guides;

ocular optical system means for introducing said optical image transmitted to the other end surfaces of said first and second optical guides into two ocular openings for observing said optical image; and

illuminating/observing control means for introducing said optical image transmitted through either of said optical guide means to said ocular opening which corresponds to said optical guide means when said illuminating light is supplied to the other one of said first or second optical guide means.

21. A stereo endoscope apparatus according to claim 2, wherein said ocular optical system is integrally formed with said optical guide means.

22. A stereo endoscope apparatus according to claim 2, wherein said ocular optical system is detachably provided for said optical guide means.

23. A stereo endoscope apparatus according to claim 2, wherein means for branching light is provided between said optical guide means and said imaging means.

24. A stereo endoscope apparatus according to claim 2, wherein an image guide is provided between said means for branching light and said ocular optical system.

27. A stereo endoscope system comprising:

an endoscope having an elongated insertion portion, a plurality of optical guide means inserted into said insertion portion through each of which an optical image can be transmitted, and a lens system for imaging an optical image at a first end surface of each said optical guide means at the front end of said insertion portion;

light emitting means for supplying illumination light to the other end of a selected one of any of said optical guide means, said light being output from said first end surface for illuminating a subject;

imaging means for making visible an optical image of the subject transmitted to the other end surface of each said optical guide means other than that illuminating said subject;

illuminating/imaging control means for controlling said light emitting means and introducing said transmitted optical image from said.

28. A stereo endoscope apparatus according to claim 27, wherein said optical guide means comprises three optical guide means.

29. A stereo endoscope apparatus according to claim 28, wherein said optical guide means comprises two optical guide means.

30. A stereo endoscope apparatus according to claim 28, wherein said stereo endoscope apparatus further comprises an ocular unit constituted by:

an ocular optical system which is detachably provided for said endoscope, and which confronts said plurality of optical guide means; and

light guide means disposed confronting one of a plurality of said optical guide means.

31. A stereo endoscope apparatus according to claim 30, wherein said ocular unit further comprises an imaging unit constituted by:

a pair of imaging optical systems which can be fitted to said endoscope, and which confronts a plurality of said optical guide means; and

light guide means which confronts one of a plurality of said optical guide means.

32. A stereo endoscope apparatus according to claim 28, wherein said optical guide means is disposed in the circumferential direction at a uniform angle relative to the center of said insertion portion.

33. A stereo endoscope apparatus according to claim 30, wherein said ocular unit is rotatably provided whereby a pair of said ocular optical system confronting a plurality of said optical guide means and said light guide means confronting one of a plurality of said optical guide means can be replaceable.

34. A stereo endoscope apparatus according to claim 31, wherein said imaging unit is rotatably provided, whereby a pair of said imaging optical system confronting a plurality of said optical guide means and said light guide means confronting one of a plurality of said optical guide means can be replaceable.

35. A stereo endoscope apparatus according to claim 29, wherein said stereo endoscope apparatus further comprises an ocular unit constituted by:

a pair of ocular optical systems which can be fitted to said endoscope, and which can confront said two optical guide means; and

single light guide means which can confront said two optical guide means.

36. A stereo endoscope apparatus according to claim 29, wherein said stereo endoscope apparatus further comprises an ocular unit constituted by:

a pair of imaging optical systems which is able to be fitted to said endoscope, and which can confront said two optical guide means; and

single light guide means which can confront said two optical guide means.

37. A stereo endoscope apparatus according to claim 29, wherein said stereo endoscope apparatus further comprises an ocular unit constituted by:

a pair of means for branching light which is able to be fitted to said endoscope, and which confronts said two optical guides;

a pair of ocular optical systems which confronts one end of said means for branching light; and

a pair of light guide means which confronts the other end of said means for branching light.

38. A stereo endoscope apparatus according to claim 29, wherein said stereo endoscope apparatus further comprises an imaging unit constituted by:

a pair of means for branching light which is able to be fitted to said endoscope, and which confronts said two optical guides;

a pair of imaging optical systems which confronts one end surfaces of a pair of said means for branching light; and

a pair of light guide means which confronts the other end surfaces of a pair of said means for branching light.

39. A stereo endoscope apparatus according to claim 38, wherein said imaging unit includes a signal cable extending from said imaging unit.

40. A stereo endoscope apparatus according to claim 38, wherein said imaging unit includes no signal cable extending from said imaging unit.

41. A stereo endoscope system comprising:

an endoscope having an elongated insertion portion, first and second optical guide means inserted into said insertion portion, and through which an optical image can be transmitted, a lens system for imaging the optical image at each front end surface of said first and second optical guides disposed at the front end of said insertion portion;

light output means which can be fitted to one end portions of said first and second optical guides of said endoscope, and which supplies illuminating light to said end portions;

light output means for outputting illuminating light to the other end surfaces of said first and second optical guides;

imaging means for imaging said optical image transmitted to the other end surfaces of said first and second optical guides;

illuminating/imaging control means for introducing said optical image transmitted through one of said optical guide means to said imaging means when said illuminating light output from said light output means is supplied to the other one of said first or second optical guide means;

signal processing means for generating image signals by signal-processing the signals which have been optically converted by said imaging means; and

monitor means for color-displaying said image signals output by said signal processing means.

42. A stereo endoscope system according to claim 41, wherein said optical guide comprises a fiber bundle.

43. A stereo endoscope system according to claim 41, wherein said optical guide comprises a relay optical system in which a plurality of lenses are longitudinally disposed.

44. A stereo endoscope system according to claim 41, wherein said optical guide comprises a refractive index gradient type of lens.

45. A stereo endoscope system according to claim 41, wherein said light output means comprises a lamp which issues white light.

46. A stereo endoscope system according to claim 41, wherein said light output means comprises face-successive light output means for outputting light of a plurality of wave ranges.

47. A stereo endoscope system according to claim 41, wherein said light output means comprises two light source lamps.

48. A stereo endoscope system according to claim 41, wherein said light output means comprises a single light source lamp.

49. A stereo endoscope system according to claim 41, wherein said imaging means comprises imaging elements provided with color filters.

50. A stereo endoscope system according to claim 41, wherein said imaging means comprises imaging elements having no color filter.

51. A stereo endoscope system according to claim 41, wherein said imaging means comprises two imaging elements.

52. A stereo endoscope system according to claim 41, wherein said imaging means comprises a single imaging element.

53. A stereo endoscope system according to claim 41, wherein means for branching light is provided between the other end surface of said optical guide means and said imaging element.

54. A stereo endoscope system according to claim 53, wherein an image guide is provided confronting one end surface of said means for branching light.

55. A stereo endoscope system according to claim 54, wherein a light guide is provided confronting the other end surface of said means for branching light.

56. A stereo endoscope system according to claim 41, wherein said imaging means is provided separately from said light output means.

57. A stereo endoscope system according to claim 41, wherein said imaging means is integrally formed with said light output means.