CA1174089A - Fiberscope system - Google PatentsFiberscope system
- Publication number
- CA1174089A CA1174089A CA 392514 CA392514A CA1174089A CA 1174089 A CA1174089 A CA 1174089A CA 392514 CA392514 CA 392514 CA 392514 A CA392514 A CA 392514A CA 1174089 A CA1174089 A CA 1174089A
- Grant status
- Patent type
- Prior art keywords
- system according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- G02B—OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
- H04N5/225—Television cameras ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
- H04N5/2251—Constructional details
- H04N5/2254—Mounting of optical parts, e.g. lenses, shutters, filters or optical parts peculiar to the presence or use of an electronic image sensor
ABSTRACT OF THE DISCLOSURE
A bundle of radomly arranged optical fibers is used to relay an image imposed upon one of its ends to an opposite receiving end where randomness of fiber arrangement is decoded for recognizable image display.
- :3 1740~
FIBERSCOPE SVST.- ~
BACKGROUND OF THE I~ "7TION
Field of the Invention:
This invention relates to optical fiber devices - with particular reference to i~?rovements in fiberscope -~ image relay systems.
: Discussion of the Prior Art~
- Flexible fiberscopes conven~ionally contain , lo a "coherent" image transporting riber bundle to relay - -- an image fro~ distal end to an eyepiece, camera, ~~
-- screen or other viewing means. Tne expression "coherent"
:j- in the present case is intended to refer to identical - geometrical patterning of opposite ends o~ bundle ~ -- 1~ fibers, i.e. thousands of fibers are required to -- be precisely aligned into an identical pattern at _ both ends of a coherent bundle. This involves tedious : and expensive operations and .he need to seriously - limit the length of the bundle.
Non-coherent or randomly arrangea fiber bun21es - are notably easier to make, less expensive and can be produced in great lengths bu. have not been previously considered useful in image transpor.ing syste~s since fiber randomness (scram~ling) renders relayed images unrecognizable. - ;~
- It is an obje~t of thA present invention, however, to use the easier to ~anufac~ure and less -~
expensive ~non-coherent" fiber bundles in fiberscope image relay systems. --More particularly, the invention provides a fiberscope system using a non-coherent fiber bun~le together with means for displaying the images transPor~ea by the bundle in recognizable fashion ~unscrambled}.
- '' . . : .
Also, there is the objective of fiberoptically transport,ing recognizable images over unusual distances.
Other objects and advantages of the invention will become apparent from the following description.
SUMMARY OF THE INVENTION
The above and other objects and advantages of the invention are accomplished with a fiberscope system utilizing a bundle of randomly arranged optical fibers are image tranSporting means. Such bundles, being adaptable to manufacture in exceptionally long lengths and of fused silica for high transmlssion, are p~ovided with image decoding means for presenting a recognizable display of the transported images, i.e. images transported through the bundle to its receiving end are reconstructed from the fixed pattern of fiber randomness of the particular bundle used.
Therefore, in a fiberscope system including an elongated fiber optic probe hav~ng a distal image-receiving end and proximal image-emitting end, the improvement according to the present invention comprising: the probe containing-an image-transporting bundle of randomly juxtapositioned fibers extending from the distal to proximal ends of the probe, opposite ends of the fibers being respectively fixed in patterns of existing randomness and the ends affording differently geometrically patterned image-receiving and emitting faces of the bundle. Means are provided for producing recognizable optical images of objects to be transported by the system upon the image-receiving face to the bundle for conduction through - _ ~
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the bundle and emission in scrambled fashion from the differently patterned emitting faces. Receiving means electrooptically receive and decode the scrambled images for display in recognizable fashion.
Details of the invention will become more readily apparent from the following description when taken in conjunction with the accompanying drawings.
IN THE DRAWINGS
Fig. 1 diagrammatically illustrates a preferred embodiment of the system of the present invention;
Fig. 2 is a fragmentary illustration of a modification of the Fig. 1 system;
Fig. 3 is a similar fragmentary illustration of another modiflcation of the Fig. 1 system; and - Fig. 4 diagrammatically illustrates system encoding.
- 2a -cr/'~`
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DESCRIPTION OF THE PREFERRED ~MBODIMF~.~TS
In system 10 of Fig. 1 there is illustrated fiberscope probe 12 containing flexible image transporting optical fiber bundle 14, fiberoptic light guide 16 coupled to light source 17 for illumina.ing objects : . to be observed with system 10 and objective lens . means 18 for presenting images of the obiects to - . : the receiving face 20 of bundle 14. Flexible sheath 22 .-- :. 10 affords protection for the above components.
.... -. To the extent thus far described probe 12 . .
.-......... is of conventional design (bundle 14 excepted) and ; . may include various additional channelling for biopsy , - or aspiration and/or objective.~ocussing mechanisms .-: - 15 wit~.~ or without distal articulation. .Those interested - in such details may refer to U.S.- Patents Nos. - .-: 3,091,235 and-3,913,568 which exemDlify particular ~- -. forms of fiberscope probes to which the present invention is applicable but in no sense restricted. ~ . -According to this invention, image transporting bundle 14 is constructed of randomly arranged op.ical -~ . fibers 24 tightly juxtapositioned at opposite image - .~
. receiving and emitting faces 20 and 26 respectively. ~ :.
, -. Thus, as discussed above, bundle 14 will be referred- ~ -25 to as "incoherent" wherewith images transported thereby will be emitted at face 26 in a scrambled, i.e. -~
~unrecognizable-fashion and ordinarily not useful in a fiberscope system. .` .
` In view of images received at face 26 being scrambled and ordinarily unrecognizable, means are.
presently provided for decoding the fiber 24 randomness ---so that incoherent bundle 14 is rendered useful as an image transmitter in sys.tem 10. To this end, image emitting face 26 of bundlé 14 is directly or .~' ' - ~'' '' ~l74089e-optically coupled to an electronic pick-up 28 such as a conven~ional vidicon or charge-coupled device - lCCD3 from which electrical signals correspo'nding _, to the light and shade of the received scrambled ' ' ~ image are directed to image processor 30. Processor 30 - comprises micro-computer decoder 32 and video display 34.
, With "memory" storage of the input pattern--- of fibers at face 20 of bundle 14 in decoder 32 and ',,~' ' - , its receipt of signals corresponding to patterning - -- ,~-, '-' 10 ,of the scrambled image received from pick-up 28, ' ' '~
, image scrambling is decoded-and reconstructed as '' -- ;'-~
'-,' a signal which is fed to video display 34 for,viewing ' ' -''-' - , on cathode ray tube (CRT) 36. -' -' ' ' ~'' ,--''' ~ Non-coherent bundle 14, although of rando~
- l; fiber 24 arrangement, has a fixed pattern of randomness-`' ' ,--which, once decoded by decoaer 30, permits recogn;zable '-~ - y~
,- , coherent images to be displayed on CR~ 36 with use, ',- ~~ '' - of system 10. - -~ ' ~- -,' ' - In Fig. 1, pick-up 28 is illustrated as being ' ' 20 optically coupled to face 26 of bundle 14 by means ' , -~
of conventional imaging lens 38 needing no furtherdescription. Alternatively, direct optical coupling , ',', of pick-up 28 may be accomplished as illustrated , ,in Fig. 2, i.e. with an optical fiber taper '40~ - ~ ,'~' --Suitable tapers are disclosed in U.S. Patents Nos. - ~' ''- '-, ~2,992,516 and 2,992, 587. Vidicon 42 coupIing to ' ~~'' bundle 14 may be similarly accomplishea wi~h taper 44 --:' as illustrated in Fig. 3. - ' ' ''' - ~- ' '' ' Referring more particularly to the ~atter of providing the above input pattern for "memoryn -' storage in decoder 32, the-system illustrated în ' ' - '~
Fig. 4 may be employed, e.g. as a one-time operation for each bundle 14 intended for use. As already , -- :
- . .
~ 17~089 -- .
' mentioned, whatever randomness of fiber patterning may exist for a particular bundle 14, it is permanent - in the finally fabricated bundle, i.e. be~ore used in a ~iberscope system.
As shown in Fig. 4, bundle 14 is coupled to ' ' ' 'decoder 32 of image processor 30 with pick-up 28 '' ~ ` ' ~ and taper 40a~ Lens 38 of Fig. 1 may,be used in ' -,, , ,- place of taper 40a. Placing image receiving face'20 ' ' ''-'''-~
- - in line with CRT flying spot scanner 46 and relay -'~
-' 10 lens 48, single s~ot "object" scanning of face 20 ---and re~ording of the resulting output spot pattern '';
on face 26 in the "memory" of decoder 32 provides ---- the decoder with the capability of reconstructing ,'' ,""'~
image scrambling resulting from bundle 14 fiber randomness.;--' 'X~ 15 ,, d It is to be understood that the above memory,,-~
- ~ s orage of scrambled input imase may also be accomplisne'd -~-~ ', by mechanically scanning face 20 of bundle la with ' -~
a spot of light. Details of the image processor 30 electronics and/or structur~ will not ~e dealt - ' -' with herein since they are well within presently - ' -'' , , available technology and are not per'se a part o~ ' ~' the present invention. Suitable equipment is commercially ~ ~' -,,' available from Xycon of Saline, Michigan.
Those skilled in the art will readily appreciate--; 25 that ~here are various other forms and adaptations -'' - - -"
- of the invention which may be made to suit particular requirements and, accordingly, the present illustrations are not to be interpreted as restrictive of the invention beyond that necessitated by th~ following cleims.
said probe containing an image-transporting bundle of randomly-juxtapositioned fibers extending from said distal to proximal ends of said probe, opposite ends of said fibers being respectively fixed in patterns of existing randomness, said ends affording differently geometrically patterned image-receiving and emitting faces of said bundle;
means for producing recognizable optical images of objects to be transported by said system upon said image-receiving face of said bundle for conduction through said bundle and emission in scrambled fashion from said differently patterned emitting face; and receiving means for electrooptically receiving and decoding said scrambled images for display in recognizable fashion.
Priority Applications (2)
|Application Number||Priority Date||Filing Date||Title|
|Publication Number||Publication Date|
|CA1174089A true CA1174089A (en)||1984-09-11|
Family Applications (1)
|Application Number||Title||Priority Date||Filing Date|
|CA 392514 Expired CA1174089A (en)||1981-02-09||1981-12-17||Fiberscope system|
Country Status (5)
|JP (1)||JPS57148468A (en)|
|CA (1)||CA1174089A (en)|
|DE (1)||DE3204316A1 (en)|
|FR (1)||FR2499738A1 (en)|
|GB (1)||GB2092859A (en)|
Families Citing this family (17)
|Publication number||Priority date||Publication date||Assignee||Title|
|NL8202698A (en) *||1982-07-06||1984-02-01||Philips Nv||A device for the optical scanning of a document.|
|GB2128839A (en) *||1982-10-15||1984-05-02||Dainichi Nippon Cables Ltd||Image display apparatus|
|JPH0516569B2 (en) *||1983-09-05||1993-03-04||Olympus Optical Co|
|DE3339182C1 (en) *||1983-10-28||1985-04-18||Schaefter & Kirchhoff||Apparatus for monitoring a welding process|
|GB2160739A (en) *||1984-06-23||1985-12-24||Mclennan Marine Limited||Night vision systems|
|JPH0412137B2 (en) *||1984-09-03||1992-03-03||Olympus Optical Co|
|JPS6225903U (en) *||1985-07-31||1987-02-17|
|US4963906A (en) *||1989-01-17||1990-10-16||Goodman Ronald C||Fiber-optically coupled video viewfinder|
|GB8903748D0 (en) *||1989-02-18||1989-04-05||Nde Instr Ltd||Fibre optic signal translation system|
|GB8924793D0 (en) *||1989-11-03||1989-12-20||Secr Defence||Visual image transmission by fibre optic cable|
|WO1997007627A3 (en) *||1995-08-17||1997-04-03||Storz Karl Gmbh & Co||Endoscopy video system|
|DE19530401A1 (en) *||1995-08-17||1997-02-20||Storz Karl Gmbh & Co||Flexible conductor for endscopes|
|DE19530453A1 (en) *||1995-08-18||1997-02-20||Storz Karl Gmbh & Co||Endoscope system with distal end objective|
|US6524237B1 (en) *||1999-06-15||2003-02-25||Intel Corporation||Method and apparatus for using non-coherent optical bundles for image transmission|
|US6587189B1 (en)||1999-11-29||2003-07-01||Srs Technologies||Robust incoherent fiber optic bundle decoder|
|US20040037554A1 (en) *||2002-08-23||2004-02-26||Ferguson Gary William||Non-coherent fiber optic apparatus and imaging method|
|ES2363679B2 (en) *||2010-08-10||2012-03-05||Universidad Politécnica de Madrid||Method for reconnection of incoherent optical fiber cables for transmission of images.|
Family Cites Families (8)
|Publication number||Priority date||Publication date||Assignee||Title|
|US2992516A (en) *||1957-07-03||1961-07-18||American Optical Corp||Method of making fiber optical components|
|US2992587A (en) *||1958-04-11||1961-07-18||American Optical Corp||Fiber optical devices|
|US3091235A (en) *||1960-06-15||1963-05-28||American Optical Corp||Diagnostic instruments|
|US4185888A (en) *||1962-09-21||1980-01-29||Quelle Fred W Jr||Cryptographic system employing optical scrambling arrays|
|US3244894A (en) *||1962-11-26||1966-04-05||American Pyrotector Inc||Photoelectric detection device utilizing randomized fiber optical light conducting means|
|US3461223A (en) *||1966-07-06||1969-08-12||Roger L Wilcox||Image translation system employing optical fibers|
|US3913568A (en) *||1973-01-22||1975-10-21||American Optical Corp||Nasopharyngoscope|
|JPS5121835A (en) *||1974-08-14||1976-02-21||Olympus Optical Co|
Also Published As
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|US4448478A (en)||Fiber optic connector|
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|US5061995A (en)||Apparatus and method for selecting fiber optic bundles in a borescope|
|US5425123A (en)||Multifiber endoscope with multiple viewing modes to produce an image free of fixed pattern noise|
|US5989185A (en)||Endoscope apparatus|
|US5005943A (en)||Rigid video-endoscope having a rotatable device for adjusting the orientation of an image relative to an image receiving device|
|Barclay et al.||Marking and observational techniques.|
|US5993071A (en)||Apparatus for connecting optical fibre connectors|
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|US4646721A (en)||Light shielding construction for the forward end of an endoscope|
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