CN103105370A - Optical fiber detection device and method - Google Patents
Optical fiber detection device and method Download PDFInfo
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- CN103105370A CN103105370A CN2013100670085A CN201310067008A CN103105370A CN 103105370 A CN103105370 A CN 103105370A CN 2013100670085 A CN2013100670085 A CN 2013100670085A CN 201310067008 A CN201310067008 A CN 201310067008A CN 103105370 A CN103105370 A CN 103105370A
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Abstract
The invention provides an optical fiber detection device capable of achieving a light and shade contrast observation effect on a fiber core and a surrounding wrapping layer during detection of an optical fiber. The optical fiber detection device comprises a light source, a phase contrast light condensation device and a phase contrast lens, wherein the phase contrast light condensation device comprises a light collection lens, a light fence and a light condensation lens; the phase contract lens is a lens with a phase plate; light transmittance regions and non light transmission regions are arranged on the light fence and the phase plate; the light transmittance region on the light fence corresponds to the non light transmission region on the phase plate; the non light transmission region on the light fence corresponds to the light transmittance region on the phase plate; and light emitted by the light source is condensed by the light collection lens, the light fence and the light condensation lens and passes through the phase contrast lens. When the optical fiber detection device is used for detecting the optical fiber, the optical fiber is placed between the phase contrast light condensation device and the phase contrast lens, and the axial direction of the optical fiber is perpendicular to the light axis of the phase contrast lens; after being concentrated by the light collection lens, the light fence and the light condensation lens, the light emitted by the light source is emitted to the optical fiber along the radial direction of the optical fiber; and after passing through the optical fiber, the light ray forms an image of the optical fiber through the phase contrast lens.
Description
Technical field
Present technique relates to a kind of optical fiber detector and detection method, relate in particular to a kind of with the phase contrast observing effect, can make fiber core and around clad form the optical fiber detector of comparison of light and shade observing effect.
Background technology
Along with the progress of science and technology, optical fiber is as transmission medium and sensing element and used in large quantities.Various optical fiber come across different application scenarios.Therefore also more and more paid attention to by people for the detection of optical fiber.In the application process of any fibre system, a major issue all must considering is the low-loss connecting method between optical fiber, to guarantee that luminous power in fiber core can be effectively be coupled in the fibre core of an other optical fiber by the junction.The mechanical registeration error is the subject matter that two optical fiber produce when connecting.Because the core diameter of multimode optical fiber only has 50～100 μ m usually, if having the mechanical registeration error between so thin optical fiber the butt coupling loss that will produce luminous power.Because there are small refractive index difference in the fibre core of optical fiber and the clad of outside, and optical fiber is a cylindrical surface structure, the object space every aspect is not in one plane, therefore, the microscope of Application standard, can't see at all core structure and with the interphase of clad, also can't the axial error of optical fiber and optical fiber junction be checked.
Summary of the invention
The purpose of present technique is to provide a kind of when optical fiber is detected, can to fibre core and around clad form the optical fiber detector of comparison of light and shade observing effect.
This optical fiber detector comprises light source, phase contrast beam condensing unit, phase contrast camera lens; The phase contrast beam condensing unit comprises collecting lens, light hurdle and condenser, and the phase contrast camera lens is the camera lens that is provided with phase-plate; Non-photic zone on all photic zone and non-photic zone on light hurdle and phase-plate, but the photic zone on the light hurdle is corresponding with the non-photic zone on phase-plate, light hurdle is corresponding with the photic zone on phase-plate; After light that light source sends converges through collecting lens, Guang Lan, condenser by the phase contrast camera lens.
The beneficial effect of present technique: present technique has adopted the phase contrast camera lens.
Phase-contrast technique belongs to prior art.In existing phasecontrast microscope, need to use light hurdle and phase-plate.The light hurdle often makes toroidal or concentric double ring shape (so generally also claim the ring light hurdle, perhaps annular shield), also has to make discontinuous ring.Phase-plate is that the annulus place corresponding to ring light hurdle printing opacity coats two-layer different film on the Circular glass sheet.One deck is magnesium fluoride, plays phase shift; Another layer is silver or aluminium, plays amplitude modulation.The ring of coating is controlled the magnesium fluoride coating thickness encircling mutually, makes direct light postpone pi/2 or 3 pi/2s (being equivalent to leading pi/2).What of amplitude modulation are depended on the thickness of silver or aluminium, also make the scrobicular ring shape or a protruding ring-type replaces the magnesium fluoride coating to play the phase shift effect.The annular beam that obtains through the ring light hurdle will just in time drop on mutually on ring, both must big or small coupling could obtain well the observing effect of phase contrast.Light hurdle and phase-plate that light hurdle in present technique and phase-plate belong to prior art.
Present technique adopts phase-contrast technique.After light that light source sends converged through collecting lens, Guang Lan, condenser, along optical fiber directive optical fiber radially, light saw through the picture that forms optical fiber after optical fiber through the phase contrast camera lens.This imaging, fibre core and the comparison of light and shade of clad formation on every side, the convenient observation.
Photic zone on above-mentioned optical fiber detector, light hurdle is an annular.
Above-mentioned optical fiber detector also is provided with frosted glass in the phase contrast beam condensing unit, frosted glass is between collecting lens and light hurdle.The effect of frosted glass is mainly to make illumination more even.Preferred light source be the angle of divergence less than 5 °, send the LED lamp of ruddiness.The LED lamp can be regulated with respect to the distance of phase contrast beam condensing unit.Regulating action before and after light source has, thus the light hurdle is fully illuminated.Light source is chosen the LED lamp that the angle of divergence is tried one's best little, thereby makes light source more close to directional light; Choose red monochromatic light as lighting source, be conducive to improve the measuring accuracy of system.
Present technique provides a kind of optical fiber to carry out detection method simultaneously, by the method, can to fibre core and the comparison of light and shade of clad formation on every side effect, observe respectively.
This optical fiber detecting method uses above-mentioned optical fiber detector, and this optical fiber detecting method is that optical fiber is placed between phase contrast beam condensing unit and phase contrast camera lens, and the axial and optical axis phase contrast camera lens of optical fiber is perpendicular; After light that light source sends converged through collecting lens, Guang Lan, condenser, along optical fiber directive optical fiber radially, light saw through the picture that forms optical fiber after optical fiber through the phase contrast camera lens.
Description of drawings
Fig. 1 is the schematic diagram of optical fiber detector.
Fig. 2 is the schematic diagram on light hurdle.
Fig. 3 is the schematic diagram of phase-plate.
Fig. 4 is the picture schematic diagram of optical fiber.
Fig. 5 is phase contrast camera lens schematic diagram.
Fig. 6 is phase contrast beam condensing unit schematic diagram.
Embodiment
Optical fiber detector shown in Figure 1 comprises light source 100, phase contrast beam condensing unit 200, phase contrast camera lens 300, ccd image sensor 400, display 500.Certainly, also can replace ccd image sensor 400, display 500 by eyepiece.
Referring to Fig. 6, phase contrast beam condensing unit 200 comprises the collecting lens 21 that is successively set in sleeve 25, frosted glass 22, light hurdle 23, condenser 24, is arranged on the contrast unit seat 26 of sleeve 25 peripheries.The phase contrast beam condensing unit directly can be positioned on phasecontrast microscope by the contrast unit seat.
Be provided with phase-plate 33 in phase contrast camera lens 300.
Referring to Fig. 2-3, light hurdle 23 is Circular glasses, annular photic zone 231 is arranged on it and be positioned at the non-photic zone 232 of annular photic zone 231 both sides.Phase-plate 33 is Circular glasses, and the non-photic zone 332 of annular and the annular photic zone 331 that is positioned at the non-photic zone of annular 332 both sides are arranged on it.Photic zone on the light hurdle is corresponding with the non-photic zone on phase-plate, and the non-photic zone on the light hurdle is corresponding with the photic zone on phase-plate.
When optical fiber is detected, optical fiber 600 is placed between phase contrast beam condensing unit 200 and phase contrast camera lens 300, and the axial and optical axis phase contrast camera lens of optical fiber is perpendicular.After light that the LED lamp sends converged through collecting lens, frosted glass, Guang Lan, condenser, along optical fiber directive optical fiber radially, light saw through the picture that forms optical fiber after optical fiber through the phase contrast camera lens, is caught by ccd image sensor 400, then send display 500 to show.If replace ccd image sensor 400 and display 500 with eyepiece, namely can be observed so the picture of optical fiber by eyepiece.
The picture of optical fiber is referring to Fig. 4, and its fibre core 51 is very dark, and clad 52 is very bright, and comparison of light and shade is very strong.
Referring to Fig. 5, phase contrast camera lens 300 comprises overcoat 1 and is arranged on four arrangement of mirrors groups 2 in overcoat 1, and wherein two mirror groups 2 are separately positioned on the front and rear of overcoat 1, are front lens group 2-1 and rear mirror group 2-2; Be mirror group 2-4 in mirror group 2-3 and second in first between front lens group 2-1 and rear mirror group 2-2; Sheet glass 4 is arranged on the anterior of described overcoat 1 and is positioned at the outside of front lens group 2-1; Phase-plate 33 is in second between mirror group 2-4 and rear mirror group 2-2.
Claims (6)
1. an optical fiber detector, is characterized in that: comprise light source, phase contrast beam condensing unit, phase contrast camera lens; The phase contrast beam condensing unit comprises collecting lens, light hurdle and condenser, and the phase contrast camera lens is the camera lens that is provided with phase-plate; Non-photic zone on all photic zone and non-photic zone on light hurdle and phase-plate, but the photic zone on the light hurdle is corresponding with the non-photic zone on phase-plate, light hurdle is corresponding with the photic zone on phase-plate; After light that light source sends converges through collecting lens, Guang Lan, condenser by the phase contrast camera lens.
2. optical fiber detector as claimed in claim 1 is characterized in that: the photic zone on the light hurdle is an annular.
3. optical fiber detector as claimed in claim 1 is characterized in that: also be provided with frosted glass in the phase contrast beam condensing unit, frosted glass is between collecting lens and light hurdle.
4. optical fiber detector as claimed in claim 3 is characterized in that: light source be the angle of divergence less than 5 °, send the LED lamp of ruddiness.
5. optical fiber detector as claimed in claim 4, it is characterized in that: the LED lamp can be regulated with respect to the distance of phase contrast beam condensing unit.
6. optical fiber detecting method is characterized in that: right to use requires 1 described optical fiber detector, and this optical fiber detecting method is that optical fiber is placed between phase contrast beam condensing unit and phase contrast camera lens, and the axial and optical axis phase contrast camera lens of optical fiber is perpendicular; After light that light source sends converged through collecting lens, Guang Lan, condenser, along optical fiber directive optical fiber radially, light saw through the picture that forms optical fiber after optical fiber through the phase contrast camera lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100670085A CN103105370A (en) | 2013-03-04 | 2013-03-04 | Optical fiber detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100670085A CN103105370A (en) | 2013-03-04 | 2013-03-04 | Optical fiber detection device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7119953B2 (en) * | 2002-12-27 | 2006-10-10 | Xradia, Inc. | Phase contrast microscope for short wavelength radiation and imaging method |
| CN101105438A (en) * | 2007-08-07 | 2008-01-16 | 江苏工业学院 | Optical fiber cone particle detection method and device |
| US20110220791A1 (en) * | 2009-09-11 | 2011-09-15 | Reed Bryan W | Ponderomotive Phase Plate For Transmission Electron Microscopes |
| CN202693473U (en) * | 2012-07-14 | 2013-01-23 | 浙江师范大学 | Device for measuring refractive index of flat plate type transparent medium |
| CN203101259U (en) * | 2013-03-04 | 2013-07-31 | 南京东利来光电实业有限责任公司 | Optical fiber detecting device |
-
2013
- 2013-03-04 CN CN2013100670085A patent/CN103105370A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7119953B2 (en) * | 2002-12-27 | 2006-10-10 | Xradia, Inc. | Phase contrast microscope for short wavelength radiation and imaging method |
| CN101105438A (en) * | 2007-08-07 | 2008-01-16 | 江苏工业学院 | Optical fiber cone particle detection method and device |
| US20110220791A1 (en) * | 2009-09-11 | 2011-09-15 | Reed Bryan W | Ponderomotive Phase Plate For Transmission Electron Microscopes |
| CN202693473U (en) * | 2012-07-14 | 2013-01-23 | 浙江师范大学 | Device for measuring refractive index of flat plate type transparent medium |
| CN203101259U (en) * | 2013-03-04 | 2013-07-31 | 南京东利来光电实业有限责任公司 | Optical fiber detecting device |
Non-Patent Citations (2)
| Title |
|---|
| MIROSLAWA BOZYK ET AL: "Application of phase contrast microscopy to quantitative characterization of optical fibers", 《OPTICAL ENGINEERING》 * |
| 李莉等: "《微生物基础技术》", 31 December 2010, 武汉理工大学出版社 * |
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Application publication date: 20130515 |