CN1051248A - Tester for amount of information on optical fibre panel - Google Patents
Tester for amount of information on optical fibre panel Download PDFInfo
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- CN1051248A CN1051248A CN 89102464 CN89102464A CN1051248A CN 1051248 A CN1051248 A CN 1051248A CN 89102464 CN89102464 CN 89102464 CN 89102464 A CN89102464 A CN 89102464A CN 1051248 A CN1051248 A CN 1051248A
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- information
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Abstract
A kind of tester for amount of information on optical fibre panel is characterized in that being made up of number of degrees of freedom, test macro, signal-to-noise test system, photoelectric conversion controller and data handling system.The present invention expresses the biography of fibre faceplate as ability with " quantity of information " this amount, estimate the quality of fibre faceplate objectively, solved unified testing standard problem to dissimilar, different production batch, different index optic fibre panels, and the quantity that can make uniform units with various communication systems, imaging and image delivering system relatively, the test formality is simplified, efficient and automaticity height, test is finished automatically by data handling system control, and outputs test result.
Description
The present invention relates to a kind of optical tester, particularly a kind of tester for amount of information on optical fibre panel.
Have now and be used for the instrument of fibre faceplate quality inspection is mainly contained: knife-edge response tester, resolution instrument, transport function instrument, numerical aperture instrument and effective flux instrument.They respectively only a certain specific isolated aspect according to the quality that the measurement of a certain value is reflected fibre faceplate.DX-1 fibre faceplate knife-edge response tester comparatively commonly used and generally believe that relatively reasonable instrument is the knife-edge response tester, as to make as China.It mainly is made up of a light-source system, observing system, receiving system and electric treatment system.Its test philosophy is to place a straight knife sheet on the front surface of tested optical fiber panel, when the light source irradiation fibre faceplate, in various degree optical fiber optical crosstalk phenomenon will be appearred by the fibre faceplate rear surface of blade stop portions, these optical crosstalk amounts just can obtain corresponding optical crosstalk value after by receiving system and electric treatment system, also claim the knife-edge response value.The knife-edge response value is low more, illustrates that the quality of fibre faceplate transitive graph picture is good more.The problem that this instrument exists has: 1. only reflect these performance index of fibre faceplate optical crosstalk amount, other that fibre faceplate can not be described passes as performance, quality that therefore can not the thoroughly evaluating fibre faceplate; 2. can not unify total quality relatively to the fibre faceplate of dissimilar, different production batch, different indexs, cause the quality error in judgement easily; 3. Measuring Time is long, data are complicated, efficient is low, and fibre faceplate of general measure need be with about one hour.Above-mentioned other several instruments also roughly exist several problems of similar DX-1 fibre faceplate knife-edge response tester.
The objective of the invention is in order to overcome the deficiencies in the prior art, a kind of tester for amount of information on optical fibre panel that can comprehensively, accurately reflect fibre faceplate quality and high efficiency is provided.
The tester for amount of information on optical fibre panel of making according to the present invention is characterized in that being made of number of degrees of freedom, test macro, signal-to-noise test system, data handling system and photoelectric conversion controller.Design of the present invention is to start with from optical information theory, by the measurement of fibre faceplate number of degrees of freedom, and snr value being obtained this fibre faceplate institute information transmitted amount, thereby expresses the ability of fibre faceplate transitive graph picture, estimates out the quality of fibre faceplate objectively.And the measurement of number of degrees of freedom, and snr value is finished by number of degrees of freedom, test macro of the present invention and signal-to-noise test system respectively.The image amplifying device that relaying imaging device, microcobjective and the image-forming objective lens that the light source that the number of degrees of freedom, test macro mainly is made up of an incandescent lamp and condenser, resolution chart, two symmetric double glue lens are formed constitutes, video camera, picture monitor and one can form at the image-scanning device that level and vertical direction move.Wherein resolution chart is to be placed in the image-scanning device on the removable resolution grillage.The native system number of degrees of freedom, is measured accurately, objectively key is that the discriminating of pattern is represented with this numeral of contrast.During test, the tested optical fiber panel is placed on the relaying imaging device specimen holder afterwards earlier.When incandescent lamp sends incoherent light, behind condenser, uniform irradiation is on resolution chart, and the resolution pattern is through being imaged on exactly behind the relaying imaging device on the front surface of tested optical fiber panel, export from the rear surface of fibre faceplate again, on the target surface through being imaged on video camera behind the image amplifying device.Its pattern will show on monitor on the one hand; On the other hand, pattern is that data handling system is carried out sampling processing by a microprocessor that has the Plus-85 frame grabber, calculates fibre faceplate at 1Cm
2In number of degrees of freedom,, and deposit it in internal memory.Selection for the resolution pattern, the operator can send steering order by operating data processing system, address decoder in photoelectric conversion controller, two-way simultaneous interface, divider, power amplifier are controlled image-scanning device, make it move resolution chart by give instruction in level or vertical direction exactly, to obtain required resolution pattern.For the influence of speckle at random of fibre faceplate, the present invention relies on data handling system to eliminate by the statistic sampling to two dimension.Measurement for snr value is to carry out after the measurement of finishing number of degrees of freedom.Signal-to-noise test system is mainly by power stabilize helium-neon laser, optoelectronic switch, beam-expanding collimation system, smallcolumn diaphragm, be made up of removable smooth hurdle, integrating sphere and the photomultiplier in two apertures of size.Its principle is after testing the number of degrees of freedom, of fibre faceplate, the tested optical fiber panel is placed on the specimen holder of signal-to-noise test system again, and usefulness output power scintillation error throws light on less than 0.3% helium neon laser beam.When removable smooth field during in the large aperture, laser will pass through the macropore on smallcolumn diaphragm, fibre faceplate and removable smooth hurdle successively, enter luminous energy even dispersion behind the integrating sphere, survey by photomultiplier again, enter data handling system behind the prime amplifier in photoelectric conversion controller, 8 A/D converters, two-way simultaneous interface, the address decoder and measure an all-round value.Make removable smooth field in the small-bore again, successively by smallcolumn diaphragm, the aperture on fibre faceplate and removable smooth hurdle enters integrating sphere to laser, is surveyed by photomultiplier more again, through with preceding identical route after, in data handling system, record a signal energy value again.Data handling system can calculate the snr value of fibre faceplate according to measured all-round value and signal energy value, and deposits internal memory in.After finishing above-mentioned two surveying works, data handling system can calculate the quantity of information of fibre faceplate automatically by number of degrees of freedom, that deposits internal memory in and snr value.The size of quantity of information bit value has just reflected the quality of fibre faceplate quality.
The present invention compared with prior art, its remarkable advantage is: 1. " quantity of information " not only characterizing the ability of fibre faceplate resolution image details, luminance level enriches situation on the point differentiating also to characterize fibre faceplate transitive graph picture.It is the science index that can comprehensively represent the fibre faceplate overall quality, has overcome the one-sidedness of prior art in test; 2. solved unified testing standard problem to the fibre faceplate of dissimilar, different production batch, different indexs, and test formality simplification, testing efficiency and automaticity height.Just can test a fibre faceplate in about 20 minutes; 3. after adopting the quantity of information index, the quantity that can do uniform units (bit) to fibre faceplate and various communication system, imaging and image delivering system (as transceiver, radar, robot calculator data line, speech ciphering equipment, optical imaging system, hologram sheet, X-ray sheet etc.) relatively, this is that prior art institute is inaccessiable.
Concrete structure of the present invention is provided by following examples and accompanying drawing.
Fig. 1 is the structural representation of the tester for amount of information on optical fibre panel that proposes of the present invention.
Fig. 2 is the structural representation of the photoelectric conversion controller in the tester for amount of information on optical fibre panel that proposes of the present invention.
Below in conjunction with accompanying drawing the present invention is described in further details.
With reference to Fig. 1, image amplifying device, video camera 7, power stabilize helium-neon laser 8, optoelectronic switch 9, beam-expanding collimation system 10, smallcolumn diaphragm 11, removable smooth hurdle 12, integrating sphere 13, photomultiplier 14, data handling system 15, monitor 16, image-scanning device 17 and photoelectric conversion controller 18 that relaying imaging device 3, microcobjective 5 and the image-forming objective lens 6 that the present invention mainly is made of the doublet objective of light source 1, resolution chart 2, two symmetries constitutes are formed.With reference to Fig. 2, photoelectric conversion controller 18 mainly is made up of address decoder 19, two-way simultaneous interface 20, divider 21, current amplifier 22,23,8 A/D converters 24 of power amplifier and prime amplifier 25.Wherein, the pulsed frequency of divider 21 is greater than 2 megahertzes, and the enlargement factor of current amplifier 22 is greater than 60, and the power gain of power amplifier 23 is greater than 10 decibels, and the voltage amplification factor of prime amplifier 25 is adjustable 10～100 times of scopes.During assembling, light source 1, image amplifying device, the video camera 7 that resolution chart 2, relaying imaging device 3, microcobjective 5 and image-forming objective lens 6 constitute is to be arranged in order to constitute the number of degrees of freedom, test macro, image-scanning device 17 is by the reaction stepping motor of two 45BF005-II types, and two of driving by stepper motor can move in level, vertical direction respectively ± precise guide rail and the resolution grillage of 3mm form.Stepper motor is connected with photoelectric conversion controller 18 intermediate power amplifiers 23.The multiplying power of relaying imaging device 3 answers strictness to be controlled to be 1 times, makes resolution pattern line spacing be imaged on unchangeably on the tested optical fiber panel 4.Between microcobjective 5 and the image-forming objective lens 6 is parallel beam, and the image enlargement ratio that they constituted is 25 times～35 times, and the resolution pattern is differentiated by video camera 7.For the resolution pattern focusing to 4 outputs of tested optical fiber panel, microcobjective 5, image-forming objective lens 6 and video camera 7 should be fixed on the common base plate, and this base plate can be done rough and meticulous two kinds of focusing to tested optical fiber panel 4.Monitor 16 joins with data handling system 15, and the output line of video camera 7 enters data handling system 15 through interface, and pattern displaying on monitor 16, is observed for the operator.Power stabilize helium-neon laser 8, optoelectronic switch 9, beam-expanding collimation system 10, smallcolumn diaphragm 11, the removable smooth hurdle 12, integrating sphere 13 and the photomultiplier 14 that have a big small-bore are also formed signal-to-noise test system of the present invention for being arranged in order, smallcolumn diaphragm 11 and removable smooth hurdle 12 all on the specimen holder of a placement tested optical fiber panel 4, lay respectively at the front surface and the rear surface of tested optical fiber panel 4.The center on smallcolumn diaphragm 11 and removable smooth hurdle 12 all is positioned on the optical axis.The aperture of smallcolumn diaphragm 11 is 0.5mm, but removable smooth hurdle 12 easy on and off move, its large aperture is 15mm, is used for surveying all-round; The small-bore is 1mm, is used for surveying signal energy.Can select the integrating sphere 13 of diameter phi=160mm to link to each other with photomultiplier 14, photomultiplier 14 has two external connections, article one, connecing output voltage is adjustable high voltage regulated power supply in-20～-1999 volts, article one, link to each other with prime amplifier 25 in the photoelectric conversion controller 18, signal enters data handling system 15 thus, so that carry out the calculating of snr value.
Above number of degrees of freedom, test macro and signal-to-noise test system can be placed on the shared platform, and the optical component in each system is the standard components and parts.The used measured object of number of degrees of freedom, test macro and signal-to-noise test system is same fibre faceplate 4, and measuring sequence is: fibre faceplate 4 places the number of degrees of freedom, test macro to test earlier.And then placing signal-to-noise test system to test, the test of two systems is finished automatically by data handling system 15 controls, and outputs test result.
Claims (5)
1, a kind of tester for amount of information on optical fibre panel is characterized in that being made up of number of degrees of freedom, test macro, signal-to-noise test system, photoelectric conversion controller 18 and data handling system 15; Wherein:
(1) image amplifying device that constitutes of the light source 1 be made up of an incandescent lamp and condenser of number of degrees of freedom, test macro, resolution chart 2, two the relaying imaging devices 3 that the symmetric double glue lens is formed, microcobjective 5 and image-forming objective lens 6, video camera 7, picture monitor 16 and one are by can forming at the image-scanning device 17 that level, vertical direction move that stepper motor drives;
(2) signal-to-noise test system by power stabilize helium-neon laser 8, optoelectronic switch 9, beam-expanding collimation system 10, smallcolumn diaphragm 11, the removable smooth hurdle 12 in two apertures of size is arranged, integrating sphere 13 and photomultiplier 14 formed;
(3) photoelectric conversion controller 18 is by address decoder 19, and two-way simultaneous interface 20, divider 21, current amplifier 22,23,8 A/D converters 24 of power amplifier and prime amplifier 25 are formed.
(4) data handling system 15 is microprocessor that have the Plus-85 frame grabber.
2, tester for amount of information on optical fibre panel according to claim 1, the multiplying power that it is characterized in that the relaying imaging device 3 in the number of degrees of freedom, test macro is 1 times.
3, tester for amount of information on optical fibre panel according to claim 1 and 2 is characterized in that the system's multiplying power that image amplifying device constituted in the number of degrees of freedom, test macro is 25 times～35 times.
4, tester for amount of information on optical fibre panel according to claim 1 and 2 is characterized in that the smallcolumn diaphragm 11 in the signal-to-noise test system and the center on removable smooth hurdle 12 all are positioned on the optical axis.
5, tester for amount of information on optical fibre panel according to claim 3 is characterized in that the smallcolumn diaphragm 11 in the signal-to-noise test system and the center on removable smooth hurdle 12 all are positioned on the optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102464 CN1019605B (en) | 1989-10-24 | 1989-10-24 | Tester for amount of information on optical fibre panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102464 CN1019605B (en) | 1989-10-24 | 1989-10-24 | Tester for amount of information on optical fibre panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051248A true CN1051248A (en) | 1991-05-08 |
| CN1019605B CN1019605B (en) | 1992-12-23 |
Family
ID=4854737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102464 Expired CN1019605B (en) | 1989-10-24 | 1989-10-24 | Tester for amount of information on optical fibre panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019605B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381806C (en) * | 2007-01-30 | 2008-04-16 | 北京理工大学 | Transmittance ratio test system for folding-shaft periscopic telescope optical system |
| CN101303269B (en) * | 2007-05-09 | 2011-12-14 | 奥林巴斯株式会社 | Optical system evaluation apparatus, optical system evaluation method and program thereof |
| CN103105285A (en) * | 2013-01-22 | 2013-05-15 | 中国计量学院 | Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution |
-
1989
- 1989-10-24 CN CN 89102464 patent/CN1019605B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381806C (en) * | 2007-01-30 | 2008-04-16 | 北京理工大学 | Transmittance ratio test system for folding-shaft periscopic telescope optical system |
| CN101303269B (en) * | 2007-05-09 | 2011-12-14 | 奥林巴斯株式会社 | Optical system evaluation apparatus, optical system evaluation method and program thereof |
| CN103105285A (en) * | 2013-01-22 | 2013-05-15 | 中国计量学院 | Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution |
| CN103105285B (en) * | 2013-01-22 | 2015-03-18 | 中国计量学院 | Shadow-rejection based test method and test instrument for optical fiber panel limiting resolution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1019605B (en) | 1992-12-23 |
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