CN1089434C - Surface plasma resonance tester - Google Patents
Surface plasma resonance tester Download PDFInfo
- Publication number
- CN1089434C CN1089434C CN 98102366 CN98102366A CN1089434C CN 1089434 C CN1089434 C CN 1089434C CN 98102366 CN98102366 CN 98102366 CN 98102366 A CN98102366 A CN 98102366A CN 1089434 C CN1089434 C CN 1089434C
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- China
- Prior art keywords
- surface plasma
- plasma resonance
- optical
- slide block
- test instrument
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- Expired - Lifetime
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- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present invention relates to a surface plasma resonance tester which comprises a control system, an optical system, a mechanical motion structure, an angular signal processing circuit and an optical signal processing circuit, wherein the mechanical motion structure comprises an optical table 2 and a link rod assembly 3 installed on an optical table. One end of a screw rod 6 is connected with a sliding block 4, and the other end is connected with a motor 7. A guideway 5 is arranged below the sliding block 4, one end of a pull rod 9 is connected with the sliding block 4, and the other end is connected with the link rod assembly 3. An angular displacement sensor 8 is installed on the screw rod 6. The present invention not only can be used for researching metal film optical characteristics, LB membrane molecular structure, optical constants, etc., but also can be used as a sensor for measuring biological quantity and chemical quantity.
Description
The invention belongs to tester, particularly the surface plasma tester.
Change the angle of incident light and detect incident intensity with the method for electromechanics and resemble angular transducer of structure to a great extent with the variation of angle.Requirement to the SPR surface plasma resonance test instrument is: promptly will realize the minor alteration of angle, again minor alteration accurately be measured.Traditional SPR uses the turbine worm structure.Its design spirit is to add big speed ratio i as far as possible, as the angle measurement accuracy that requires to reach is 1 ‰, and the angle that can accurately measure is 0.5 degree, and then ratio of gear i is not less than 200.It is very big numerals that ratio of gear equals 200, and such ratio of gear generally is used to obtain micro-displacement.In the common gear train, the ratio of gear of turbine worm is 30-100.Reach the ratio of gear more than 200, need the transmission of turbine worm combination gear.And to realize that detection means can same moved further, need two cover drive apparatus.
The objective of the invention is to propose a kind of sensor-based system that detects resonance absorbing angle subtle change.
Principal feature of the present invention is that surface plasma resonance test instrument comprises that control system, optical system, mechanical motion structure, angle signal are handled, light signal is handled, it is characterized in that said mechanical motion structure comprises optical table 2, be installed in the connection rod set 3 on the optical table, screw rod 6 one terminations have slide block 4, the other end is connected with motor 7, at slide block one guide rail 5 is arranged for 4 times, and pull bar 9 one ends connect slide block 4, the other end connects connection rod set 3, and angular displacement sensor 8 is installed on the screw rod 6.
Light source 10 and photodiode 11 are placed on the connection rod set 3, and light source 10 is solid state lasers.
Apparatus of the present invention go slick, and test accurately not only can be applicable to study the molecular structure, optical constant of metallic film optical characteristics and LB film etc., also can be used as sensor to measurement biological, the chemistry amount.
Description of drawings
Fig. 1 is a system chart of the present invention
Fig. 2 is the mechanical motion structure principle chart.1-tester pedestal 2-optical table 3-connection rod set 4-slide block 5-guide rail 6-screw rod 7-motor 8-angular displacement sensor 9-pull bar 10-light source 11-photodiode among the figure.
Below in conjunction with accompanying drawing narration the present invention.
As shown in Figure 1, control system is according to the modulating frequency and the amplitude of the travelling speed of running status decision physical construction and direction, light source.Signal is divided into two kinds of angle and light intensity, and when mechanical movement during to extreme position, control system is proofreaied and correct angle, and according to operation result mechanical speed is adjusted automatically.At each distinguishable incident angle, system all detects light intensity, and the sampling rate and the sample number of detection are controlled.The foundation of the parameter the when result of each run measures as decision is next.By accompanying drawing 2 as can be known, leverage can accurately be realized micro angular displacement, and simple in structure.If brachium is 200 millimeters, for obtaining the angular displacement of 1 ‰ angles, the distance that the arm end will move is 4 microns, and the straight-line displacement that obtains 4 microns can realize with screw pair.If the tooth of spiral is apart from being 0.5 millimeter, i.e. moving 360 ° of displacements that obtain 0.5 millimeter of revolution, 4 microns displacement is equivalent to 2.9 ° angular displacement, and big like this angular displacement is easy to measure.But the motion of connection rod set 3 end points is along camber line, and screw pair can only move along a straight line, and for rectilinear motion and circular motion are combined, must use pull bar 9 and guide rail 5.The pedestal 1 of tester is used for placing physical construction, and prism is placed on the optical table 2, and connection rod set 3 one ends are fixed on the optical table 2, and the other end is connected with slide block 4 by pull bar 9.Screw rod 6 one ends are equipped with slide block 4, and the other end is connected with motor 7, at slide block one guide rail 5 are arranged for 4 times, and angular displacement sensor 8 is installed on the screw rod 6.Motor 7 drives accurate screw rod 6 and slide block 4 moves back and forth in guide rail 5 to change the angle of incident light.The rotation of screw rod is measured by angular displacement sensor 8.The effect of guide rail 5 is that the movement locus of slide block 4 is overlapped with the axis of optical table 2.Require four arms of connection rod set 3 isometric fully.Like this, the variation of incident angle of light can calculate by the move distance of slide block.Angular displacement sensor 8 is measured the angle that screw rod 6 rotates, and can calculate the displacement of slide block 4 again according to pitch.The advantage of this structure is to realize that small incident angle changes and variation range greatly, and simultaneously reflected light is followed the tracks of.The sensitivity of system is decided by motor 7 and angular displacement sensor 8 minimum distinguishable angular displacements.The degree of accuracy of system is mainly determined by the manufacturing accuracy of screw rod 6.And the size of the brachium of the length of stroke of slide block 4 and connecting rod decision measurement range.Use when of the present invention, determinand is positioned on the optical table 2, places the action of the control system control mechanical system in the computing machine and to the analysis of angle and light intensity signal.Can be according to the automatic continuous working of software set.
Claims (5)
1, surface plasma resonance test instrument, comprise control system, optical system, mechanical motion structure, angle signal processing circuit, optical signal processing circuit, it is characterized in that said mechanical motion structure comprises optical table (2), be installed in the connection rod set (3) on the optical table, screw rod (6) one terminations have slide block (4), the other end is connected with motor (7), one guide rail (5) is arranged under slide block (4), pull bar (9) one ends connect slide block (4), the other end connects connection rod set (3), and angular displacement sensor (8) is installed on the screw rod (6).
2, by the described surface plasma resonance test instrument of claim 1, it is characterized in that four arms of said connection rod set (3) are isometric.
3, by the described surface plasma resonance test instrument of claim 1, it is characterized in that light source (10) and photodiode (11) are placed on the connection rod set (3).
4, by the described surface plasma resonance test instrument of claim 1, it is characterized in that the movement locus of slide block (4) overlaps with the axis of optical table (2).
5, by the described surface plasma resonance test instrument of claim 3, it is characterized in that said light source (10) is a solid state laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102366 CN1089434C (en) | 1998-06-08 | 1998-06-08 | Surface plasma resonance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102366 CN1089434C (en) | 1998-06-08 | 1998-06-08 | Surface plasma resonance tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1238448A CN1238448A (en) | 1999-12-15 |
| CN1089434C true CN1089434C (en) | 2002-08-21 |
Family
ID=5217292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98102366 Expired - Lifetime CN1089434C (en) | 1998-06-08 | 1998-06-08 | Surface plasma resonance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089434C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297852A (en) * | 2011-05-24 | 2011-12-28 | 北京理工大学 | Single-shaft driven four-bar mechanism portable SPR detector |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520394C (en) * | 2005-03-08 | 2009-07-29 | 中国科学院电子学研究所 | Single-channel multi-parameter surface plasms resonance tester |
| CN100535641C (en) * | 2006-03-30 | 2009-09-02 | 中国科学院电子学研究所 | High flux multiparameter imaging surface plasma resonance test instrument |
| CN104568838A (en) * | 2013-10-28 | 2015-04-29 | 南开大学 | Total internal reflection method-based automatic wide-spectrum range substance dispersion measurement device |
| CN103728272B (en) * | 2013-12-11 | 2016-03-16 | 王丽红 | Surface plasma resonance image-forming pick-up unit |
| CN108318451A (en) * | 2018-05-07 | 2018-07-24 | 中国计量大学 | A kind of solid material refractive index measuring instrument from motion tracking reflection light |
-
1998
- 1998-06-08 CN CN 98102366 patent/CN1089434C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297852A (en) * | 2011-05-24 | 2011-12-28 | 北京理工大学 | Single-shaft driven four-bar mechanism portable SPR detector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1238448A (en) | 1999-12-15 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20020821 |
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| CX01 | Expiry of patent term |