CN2497394Y - Measuring instrument of storage characteristics of light storage material - Google Patents
Measuring instrument of storage characteristics of light storage material Download PDFInfo
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- CN2497394Y CN2497394Y CN 01253411 CN01253411U CN2497394Y CN 2497394 Y CN2497394 Y CN 2497394Y CN 01253411 CN01253411 CN 01253411 CN 01253411 U CN01253411 U CN 01253411U CN 2497394 Y CN2497394 Y CN 2497394Y
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Abstract
A tester of storage characteristics of a light memory material is suitable for the testing of the storage characteristics of a plurality of disk recording materials, and comprises a testing light source part, a testing display part, an in-out part of the optical beam, a part which adjusts the tested position, a monitoring display part and a monitoring light source, wherein, the in-out part of the optical beam is arranged on the surface of a tested recorded layer of a tested sample and a high numerical aperture lens and a semi-ball shaped solid soakage lens are combined into a higher numerical aperture lens. Compared with the prior art, the utility model has higher resolving power and the higher measurement accuracy. The high numerical aperture lens and the semi-ball shaped solid soakage lens can be changed conveniently, thus the adjusting of the position of the tested sample is convenient. The utility model has the monitoring display part and the monitoring light source, which can intuitively monitor the focusing process and observe and record the facula and record the shape of points, causing that the testing of the installation is intuitive and the operation is convenient and thus, the testing efficiency is improved.
Description
Technical field:
The utility model is a kind of tester of storage characteristics of optical memory material.The main optical memory material that is suitable for is meant the recording layer material of CD-WORM (CD-R), read-write CD (CD-RW), high density CD-WORM (DVD-R) and the read-write CD of high density (DVD-RW) or the like CD, also can be used for recording and erasable storage medium of other luminous point pointwise records.
Background technology:
Storage characteristics of optical memory material is carried out static test, comprise and determine that it writes wavelength, Writing power, write pulsewidth, wipe wavelength, erase power and the relation of wiping pulsewidth and signal contrast and erasure rate are that optical memory material enters the thing that practicability at first will be done before.Test result has reflected the combined influence of material storage properties, preparation technology and film-forming process.Formerly in the technology storage characteristics of optical memory material being carried out static test is to have adopted a kind of magneto-optic disk static test instrument (referring to " magneto-optic disk static test instrument ", Chen Zhongyu, Gan Baihui, Haiqing Liu and dried good fortune dawn, " optics journal ", the 11st volume, the 12nd phase, in Dec, 1991, the 1110th～1114 page).The significant defective of this tester is: can only adopt the laser of a wavelength to write and wipe test, change optical maser wavelength after, equipment just can not use, unless transformation or heavily change significantly; It is also pretty troublesome to change object lens; Because object lens are under sample, can't add the semisphere solid and soak into lens; More can't add and monitor focusing process and the optical system that writes and wipe back measuring point pattern.
Summary of the invention:
The tester of storage characteristics of optical memory material of the present utility model comprises several major parts, has testing light source part, test display part, light beam to write and reads part, adjusts the measured position part, monitors the display part and monitor light source.Testing light source part wherein: contain laser instrument 6, on the optical axis oo of laser instrument 6 emission light beam G working direction, be equipped with acousto-optic modulator 7 successively, expand tread assembly 8, cube ahrens prism 9, quarter-wave plate 10 and spectroscope 11.The light splitting surface of spectroscope 11 and optical axis oo place at angle at 45.
Wherein test the display part: containing on article one perpendicular line o ' o ' of central point perpendicular to laser instrument 6 emission light beam G optical axis oo that places by cube ahrens prism 9 light splitting surfaces has convergent lens 12 and photodetector 14.The output of photodetector 14 is connected on the computing machine 23 that has display 24 by electronic control box 22.
Light beam writes reads part, be included on the second perpendicular line o " o " that passes spectroscope 11 central point Oo perpendicular to laser instrument 6 emission light beam G optical axis oo, be equipped with high-NA objective 13 and semisphere solid on the direction that spectroscope 11 folded light beam G ' advance and soak into lens 15, semisphere is soaked into the sphere of lens 15 towards high-NA objective 13, and the focus of high-NA objective 13 drops on the central point on semisphere solid infiltration lens 15 planes.
Said adjustment measured position part, comprise that sample 16 is placed on inside and is equipped with on the one dimension translation stage 19 of first limit switch 19 and second limit switch 20, the plane contact that the tested recording layer surface and the semisphere of sample 16 soaked into lens 15, soak into the optical loss at lens 15 plane contact places in order to reduce tested recording layer surface and semisphere, make both closely contacts of surface, maximum spacing between the surface both perhaps is placed with refractive index oil less than 150 nanometers between two surfaces.One dimension translation stage 19 places on the three-dimensional platform 21, and one dimension translation stage 19 is connected with stepper motor 17.Stepper motor 17, first limit switch 19 and second limit switch 20 link to each other with computing machine 23 by electronic control box 22.
Said supervision display part, be included on the second perpendicular line o " o " of above-mentioned laser instrument 6 emission light beam G optical axis oo, on the opposite direction of spectroscope 11 folded light beam G working direction, be equipped with half-reflection and half-transmission spectroscope 4, tube lens 3 successively and have the video camera 1 of monitor 2 by spectroscope 11 beginning.The focus of tube lens 3 drops on the receiving plane 101 of video camera 1 just.The light splitting surface of half-reflection and half-transmission spectroscope 4 and second perpendicular line o " o " place at angle at 45.
Said supervision light source is a white light source 5, white light source 5 optical axis o o with pass the perpendicular line o o of half-reflection and half-transmission spectroscope 4 central points and overlap perpendicular to second perpendicular line o " o ".It comprises from half-reflection and half-transmission spectroscope 4 to the 5 optical axis o o of the white light source between the incandescent lamp 505, is equipped with illuminating lens 501, aperture diaphragm 502, field stop 503 and condenser lens 504 successively.Their center all is positioned on the optical axis o o .Field stop 503 is positioned at the focus in object space place of illuminating lens 501, and it is controlling the visual field of monitoring system.Aperture diaphragm 502 control white light beam G " bore, so it is controlling the numerical aperture and the depth of focus of monitoring system.As shown in Figure 1.
The tester of storage characteristics of optical memory material of the present utility model as mentioned above with structure shown in Figure 1.Describe structure of the present utility model in detail below in conjunction with accompanying drawing.Said testing light source partly has laser instrument 6., acousto-optic modulator 7 is arranged in the launch window of laser instrument 6 on one side, it is the strongest that the orientation of acousto-optic modulator 7 should make laser pass through after it the first-order diffraction light of diffraction.On acousto-optic modulator 7 output beam working direction, be equipped with successively and expand tread assembly 8, cube ahrens prism 9, quarter-wave plate 10 and spectroscope 11.The optical axis oo that expands tread assembly 8 overlaps with the first-order diffraction light of acousto-optic modulator 7.Being centered close on the optical axis oo of cube ahrens prism 9, quarter-wave plate 10, and their plane of incidence is vertical with optical axis oo.The angle at 45, polarization direction of the linearly polarized light of the quick shaft direction of quarter-wave plate 10 and laser instrument 6 outputs.The light splitting surface of spectroscope 11 and optical axis oo angle at 45, and its central point Oo is positioned on the optical axis oo.
There is the semisphere solid to soak into lens 15 on the second perpendicular line o " o " of central point Oo perpendicular to optical axis oo of the light splitting surface by spectroscope 11, the plane that the semisphere solid soaks into lens 15 is equivalent to place on sample 16 surfaces, sample 16 is placed on the one dimension translation stage 19, and one dimension translation stage 19 places on the three-dimensional platform 21.Have first limit switch 18 and second limit switch 20 to be installed in the one dimension translation stage 19, first limit switch 18 is connected with electronic control box 22 with second limit switch 20.One dimension translation stage 19 drives its displacement by connected stepper motor 17, and stepper motor 17 is connected with electronic control box 22.Electronic control box 22 is connected with computing machine 23 by cable, and the signal generation interface board of computing machine 23 inside is connected with acousto-optic modulator 7 by lead, and the input information of computing machine 23 and object information are by showing by the connected display 24 of cable.Soak at the semisphere solid on the second perpendicular line o " o " between the central point Oo of light splitting surface of lens 15 and spectroscope 11, the high-NA objective 13 that has optical axis to overlap with second perpendicular line o " o ", the focus of high-NA objective 13 drop on the plane of semisphere solid infiltration lens 15.On second perpendicular line o " o ", the video camera that has monitor 21 that has central axis to overlap with second perpendicular line o " o ", it is relative that the receiving plane 101 of video camera 1 soaks into lens 15 across spectroscope 11 and semisphere solid.On the second perpendicular line o " o " between the receiving plane 101 of spectroscope 11 and video camera 1, the tube lens 3 that has optical axis to overlap with second perpendicular line o " o ", the focus of tube lens 3 drops on the receiving plane 101 of video camera 1.On the second perpendicular line o " o " between spectroscope 11 and the tube lens 3, the half-reflection and half-transmission spectroscope 4 of reflecting surface central point on second perpendicular line o " o " arranged, the reflecting surface of half-reflection and half-transmission spectroscope 4 is towards spectroscope 11, and with second perpendicular line o " o " angle at 45.
The central point of the reflecting surface by half-reflection and half-transmission spectroscope 4 has the perpendicular line o o vertical with second perpendicular line o " o ".This perpendicular line o o is the optical axis of white light source 5.
Be equipped with photodetector 14 on article one perpendicular line o ' o ' of central point perpendicular to optical axis oo of the light splitting surface by cube ahrens prism 9, its central axis overlaps with article one perpendicular line o ' o ' of the central point that passes cube ahrens prism 9, and is parallel with second perpendicular line o " o ".Simultaneously, the orientation of laser instrument 6 should make the polarization direction of linearly polarized light of output and the plane parallel of article one perpendicular line o ' o ' and optical axis oo decision.The output of photodetector 14 is connected with electronic control box 22.On article one perpendicular line o ' o ' between photodetector 14 and cube ahrens prism 9, the convergent lens 12 that has optical axis to overlap with article one perpendicular line o ' o ', the focus of convergent lens 12 drops on the receiving plane of photodetector 14.
Said expansion tread assembly 8 comprises that the focus of dispersing concavees lens 801 and 802, two lens of collimation convex lens that optical axis overlaps with optical axis oo overlaps.Disperse concavees lens 801 with beam divergence, the light beam that will disperse again of collimation convex lens 802 becomes parallel beam G, and the bore of the bore of the parallel beam G of this outgoing during than incident is big, and promptly the first-order diffraction beam size than acousto-optic modulator 7 outgoing is big.
Be coated with on said spectroscope 11 light splitting surfaces the emission of lasering beam wavelength X reflectivity of laser instrument 6 greater than 95% spectro-film, say the light splitting surface of spectroscope 11 be exactly the surface that is coated with spectro-film.
Said half-reflection and half-transmission spectroscope 4 is to be coated with white light reflection 50% on the surface, sees through the glass parallel flat of 50% transflective film, say the reflecting surface of half-reflection and half-transmission spectroscope 4 be exactly the surface that is coated with the white light transflective film.
The numerical aperture of said high-NA objective is greater than 0.8.
The radius of the hemisphere of said semisphere solid infiltration lens is less than 1 millimeter.
Said cube of ahrens prism 9 formed by two equilateral right-angle prism gummeds, be coated with polarization beam splitter on the cemented surface, to light (S) transmission of polarization direction perpendicular to optical axis oo and article one perpendicular line plane that o ' o ' constitutes, the light (P) that the polarization direction is parallel to optical axis oo and article one perpendicular line plane that o ' o ' constitutes reflects, and the light splitting surface of said cube of ahrens prism 9 is exactly the cemented surface that is coated with polarization beam splitter.
Diffraction will take place after by acousto-optic modulator 7 in the aforesaid structure of tester of the present utility model, monochrome (wavelength is λ) the linear polarization parallel beam of laser instrument 6 emission.Acousto-optic modulator 7 first-order diffraction light form wide light beam G by expanding tread assembly 8 backs.Light beam G to the S transmittance,, that is to say that the light splitting surface of cube ahrens prism 9 is that linearly polarized light sees through to the polarization direction of laser instrument 6 outputs by the polarization beam splitter of cube ahrens prism 9 to the reflection of P light.The linearly polarized light beam that sees through cube ahrens prism 9 passes quarter-wave plate 10, because angle at 45, the polarization direction of the quick shaft direction of quarter-wave plate 10 and incident ray polarized light, so become the garden polarized light by quarter-wave plate 10 back linearly polarized light beams.Again by spectroscope 11, because the light splitting surface of spectroscope 11 is to be coated with on the surface the reflectivity of the output laser wavelength lambda of laser instrument 6 greater than 95% spectro-film, so light beam becomes parallel beam G ' after spectroscope 11 has 95% light beam to be reflected, parallel beam G ' is by high-NA objective 13, with beam convergence on the surface of sample 16, the plane of soaking into lens 15 because of the semisphere solid is to place on the surface of sample 16, i.e. the plane of semisphere solid infiltration lens 15 is tight contacts with sample 16 surfaces.And sample 16 is exactly the measured surface that is coated with recording layer with the one side that semisphere solid infiltration lens 15 contact.Finally converge to the focus place of high-NA objective 13 behind the sphere of convergent beam by high-NA objective 13 by semisphere solid infiltration lens 15, also be the central spot that the semisphere solid soaks into the plane of lens 15, just light beam soaks into lens 15 plane post-concentrations by the semisphere solid has on the surface of recording layer to sample 16.Sample 16 is to be placed on the one dimension translation stage 19.One dimension translation stage 19 is fixed on again on the three-dimensional platform 21.Three-dimensional platform 21 and one dimension translation stage 19 are used to regulate the translation of sample 16 and front-back direction up and down.One dimension translation stage 19 is by connected stepper motor 17 drive displacement.Stepper motor 17 is connected with electronic control box 22.17 work of electronic control box 22 control step motors.First limit switch 18 and second limit switch 20 are contained in the one dimension translation stage 19, are connected with electronic control box 22.When one dimension translation stage 19 moves to certain position, one of first limit switch 18 and second limit switch 20 will send a signal to electronic control box 22.Because of electronic control box 22 is connected with computing machine 23, computing machine 23 moves by electronic control box 22, stepper motor 17, first limit switch 18 and the second limit switch 20 control one dimension translation stages 19.The signal generation interface board of computing machine 23 inside is connected with acousto-optic modulator 7, thus the power and the make-and-break time of guide sound photomodulator 7 first-order diffraction light.The input information of computing machine 23 and object information are by showing by the connected display 24 of cable.
The light beam that converges at the focus place of high-NA objective 13 is reflected by the recording layer on the sample 16 at the focus place that places high-NA objective 13, return along former road, soak into the transmission of lens 15 through the semisphere solid, the refraction of high-NA objective 13, after the reflection of spectroscope 11, incide on the quarter-wave plate 10, through behind the quarter-wave plate 10, the garden polarized light becomes linearly polarized light, and the polarization direction of the linearly polarized light of polarization direction and laser instrument 6 outputs at an angle of 90, when inciding cube ahrens prism 9 again, will be by the reflection of the light splitting surfaces in cube ahrens prism 9 after overconvergence lens 12 with beam convergence, convergent point is on the receiving plane of photodetector 14, photodetector 14 is converted into electric signal with light signal and delivers in the electronic control box 22, electronic control box 22 is sent into this electric signal in the computing machine 23 again, carries out A/D conversion and data acquisition by 23 pairs of electric signal of computing machine.Its result is demonstrated by display 24.
" light beam after 4 reflections of half-reflection and half-transmission spectroscope, converge to sample 16 through spectroscope 11, high-NA objective 13 and semisphere solid infiltration lens 15 has on the surface of recording layer the white light beam G of white light source 5 emissions.There is the white light beam of the surface reflection of recording layer to soak into lens 15 backs by high-NA objective 13 collections, through spectroscope 11 and half-reflection and half-transmission spectroscope 4 by the semisphere solid again by sample 16, light after the transmission forms light beam G , behind tube lens 3, on the picture side of tube lens 3 focal plane, form the picture that sample 16 has the surface of recording layer.Just the face of accepting 101 of video camera 1 is on the picture side of tube lens 3 focal plane, shows so video camera 1 just has the sample 16 that receives the picture on the surface of recording layer to deliver on the monitor 2, is constantly monitoring the state of sample 16 with this.As shown in Figure 1.
Tester of the present utility model at first be light beam write read the part be to place on the tested recording layer surface of sample 16, easy to adjust, wherein there are high-NA objective 13 and semisphere solid to soak into lens 15 and are combined into the more micro objective of high-NA.Proving installation ratio of the present utility model for this reason is measurement mechanism resolution height, the measuring accuracy height of technology formerly.And replacing high-NA objective 13 and semisphere solid infiltration lens 15 convenience.Proving installation the Lights section of the present utility model is to come with the parts relevant with laser instrument 6 wavelength with the isolation of components of laser instrument 6 Wavelength-independents, after changing laser instrument 6, only need fine setting to expand tread assembly 8, change cube ahrens prism 9, quarter-wave plate 10 and spectroscope 11, other parts or element need not all to adjust and change, and have expanded the usable range of device; Because high-NA objective 13 can be changed as micro objective; Certainly semisphere solid infiltration lens 15 can be added up, and also can not add up, and can carry out near field of light storage research after adding, measure highdensity optical disk reading and write, do not add up, and be exactly common static tester.The utility model contains the supervision display part and monitors the Lights section, can monitor the focusing process intuitively, and Direct observation record hot spot and measuring point (point that writes for the first time or clash after point) pattern, make the test of tester of the present utility model directly perceived and easy to operate, improved the efficient of test.
Description of drawings:
Fig. 1 is the structural representation of the tester of storage characteristics of optical memory material of the present utility model.
Embodiment:
Device as shown in Figure 1.Laser instrument 6 adopts argon ion gas laser (wavelength 514.5nm), and about beam diameter 1mm, divergence is 1 milliradian, and peak power is greater than 100mW.The carrier frequency of acousto-optic modulator 7 is 100MHz, modulating frequency 0～10MHz, and diffraction efficiency is greater than 85%.The numerical aperture of high-NA objective 13 is 0.9, operating distance 2mm.The expansion bundle multiplying power that expands tread assembly 8 is 10 times.The semisphere solid soaks into the refractive index of lens 15 greater than 1.8, and radius is 0.714mm.Tube lens 3 focal length 200mm.Video camera 1 is 1/4 " colored charge-coupled device (CCD) camera.Monitor 2 is 14 inches colour picture monitors.In the test process, structure as above-mentioned Fig. 1, sample 16 is placed on the one dimension translation stage 19, adjust one dimension translation stage 19 and with three-dimensional platform 20 measured surface of sample 16 is closely contacted with the plane that the semisphere solid soaks into lens 15, perhaps between adds one deck refractive index oil to improve the efficient of near field coupling.Open all power supplys, comprise the power supply of laser instrument 6, the power supply of acousto-optic modulator 7, the power supply of electronic control box 22, the power supply of computing machine 23, the power supply of display 24, the power supply of incandescent lamp 505, the power supply of video camera 1 and the power supply of monitor 2.Laser instrument 6 has laser output.Send a direct current signal by computing machine 23 to acousto-optic modulator 7, laser instrument 6 produces constant first-order diffraction light by acousto-optic modulator 7 backs, adjusts the orientation of acousto-optic modulator 7, makes first-order diffraction light the strongest.By computing machine 23 controls, give acousto-optic modulator 7 outputs a zero-signal, first-order diffraction light is disappeared, the output laser of laser instrument 6 just can not incide and expand on the tread assembly 8 and subsequent on the optical element.
Meanwhile, by the white light beam G of white light source 5 emissions " incide on the half-reflection and half-transmission spectroscope 4, by inciding on the spectroscope 11 after its reflection; Reenter after the light beam that sees through spectroscope 11 incides on the high-NA objective 13 and be mapped to the semisphere solid and soak on the lens 15.At this moment, high-NA objective 13 and semisphere solid soak into lens 15 in conjunction with being equivalent to a more micro objective of high-NA, and the beam convergence that it will incide on them has on the surface of recording layer to sample 16.Soak into lens 15 by the semisphere solid again and high-NA objective 13 is collected by the light of the tested surface scattering that recording layer is arranged of sample 16, return along former road, after seeing through spectroscope 11 and half-reflection and half-transmission spectroscope 4, sample 16 there is the surface imaging of recording layer accept on the face 101 at video camera 1 by tube lens 3.Monitor 2 has the surface of recording layer to look like to show sample 16.During beginning the semisphere solid soak into the position of lens 15 may be improper, on the monitor 2 not picture show, at this moment, about, front and back and up-down adjustment three-dimensional platform 21, picture is shown on monitor 2.
Then by computing machine 23 controls, make stepper motor 17 rotate a step to certain direction, one dimension translation stage 19 is thereupon to certain one step of direction displacement, computing machine 23 sends an electric impulse signal to acousto-optic modulator 7, just become a light pulse by the first-order diffraction light behind the acousto-optic modulator 7, by becoming light beam G behind the expansion bundle that expands tread assembly 8, incide on cube ahrens prism 9, the light beam that sees through cube ahrens prism 9 becomes the garden polarized light through behind the quarter-wave plate 10 again.The garden polarized light is beaten is becoming parallel beam G ' after the reflection on the spectroscope 11.Parallel beam G ' soaks into lens 15 post-concentrations in the focus place of high-NA objective 13 on the recording layer of sample 16 by high-NA objective 13 and semisphere solid, meanwhile write down out a point (being used to write test), on monitor 2, can observe the pattern of this point.
By above-mentioned steps measuring light storage medium static nature, the highest Writing power is 25mW, and minimum readout power 0.2mW divides 256 grades from the peak power to the lowest power.Pulsewidth from 50 nanoseconds to 5 microseconds, divide 256 grades.Total jam-to-signal is below 1%.Computing machine 23 has been realized the robotization of test.
Claims (3)
1. the tester of a storage characteristics of optical memory material comprises
＜1〉testing light source part: contain and be equipped with acousto-optic modulator (7) successively on the optical axis (oo) of laser instrument (6) emission light beam (G) working direction, expand tread assembly (8), ahrens prism (9), quarter-wave plate (10) and spectroscope (11), the angle at 45 placement of the light splitting surface of spectroscope (11) and optical axis (oo);
＜2〉test display part: contain the central point that places by a cube ahrens prism (9) light splitting surface perpendicular on laser instrument (6) emission light beam (G) optical axis (oo) article one perpendicular line (o ' o ') convergent lens (12) and photodetector (14) being arranged, the output of photodetector (14) is connected on the computing machine (23) that has display (24) by electronic control box (22);
It is characterized in that:
＜3〉light beam writes and reads part: be included on the second perpendicular line (o " o ") perpendicular to laser instrument (6) emission light beam (G) optical axis (oo) that passes spectroscope (11) central point (Oo), be equipped with high-NA objective (13) and semisphere solid on the direction that spectroscope (11) folded light beam (G ') is advanced and soak into lens (15), the semisphere solid soaks into the sphere of lens (15) towards high-NA objective (13), and the focus of high-NA objective (13) drops on the central point on semisphere solid infiltration lens (15) plane;
＜4〉adjust the measured position part: comprise that sample (16) is placed on inside and is equipped with on the one dimension translation stage (19) of first limit switch (19) and second limit switch (20), the plane contact that the tested recording layer surface and the semisphere of sample (16) soaked into lens (15), one dimension translation stage (19) places on the three-dimensional platform (21), one dimension translation stage (19) is connected with stepper motor (17), and stepper motor (17), first limit switch (19) and second limit switch (20) link to each other with computing machine (23) by electronic control box (22);
＜5〉the supervision display part is arranged: be included on the second perpendicular line (o " o ") of above-mentioned laser instrument (6) emission light beam (G) optical axis (oo), on the opposite direction of spectroscope (11) folded light beam (G ') working direction, be equipped with half-reflection and half-transmission spectroscope (4), tube lens 3 successively and have the video camera 1 of monitor 2 by spectroscope (11) beginning, the focus of tube lens (3) drops on the receiving plane (101) of video camera (1) just, and place at the light splitting surface of half-reflection and half-transmission spectroscope (4) and second perpendicular line (o " o ") angle at 45;
＜6〉light source of supervision being arranged is white light source (5), white light source (5) optical axis (o o ) overlaps with passing the perpendicular line (o o ) of half-reflection and half-transmission spectroscope (4) central point perpendicular to second perpendicular line (o " o "), and it comprises from half-reflection and half-transmission spectroscope (4) be equipped with illuminating lens (501), aperture diaphragm (502), field stop (503) and condenser lens (504) successively to white light source (5) optical axis between the incandescent lamp (505) (o o ).
2. the tester of storage characteristics of optical memory material according to claim 1 is characterized in that being coated with on the light splitting surface of said spectroscope (11) to laser instrument (6) emission of lasering beam wavelength reflectivity greater than 95% spectro-film.
3. the tester of storage characteristics of optical memory material according to claim 1, the tested recording layer surface that it is characterized in that said sample (16) is tight the contact with the plane that the semisphere solid soaks into lens (15), perhaps is placed with refractive index oil between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253411 CN2497394Y (en) | 2001-08-31 | 2001-08-31 | Measuring instrument of storage characteristics of light storage material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01253411 CN2497394Y (en) | 2001-08-31 | 2001-08-31 | Measuring instrument of storage characteristics of light storage material |
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| CN2497394Y true CN2497394Y (en) | 2002-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867821B (en) * | 2003-10-10 | 2010-04-14 | 奥普特斯公司 | Portable device for measuring the light intensity of an object, and use of one such device |
-
2001
- 2001-08-31 CN CN 01253411 patent/CN2497394Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867821B (en) * | 2003-10-10 | 2010-04-14 | 奥普特斯公司 | Portable device for measuring the light intensity of an object, and use of one such device |
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