Angle scanning apparatus and application thereof
A technology of angle scanning and angular contact ball bearings, which is applied in the detection field, can solve problems such as difficult processing, inability to completely eliminate errors, complex structure, etc., and achieve the effect of convenient operation, reasonable design, compact and simple structure
Inactive Publication Date: 2010-12-08
ZHEJIANG UNIV
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Problems solved by technology
Its structure is complex, processing is difficult, and the motion accuracy is completely dependent on the machining accuracy of the screw.
However, due to the limitations of the principle, this structure cannot completely eliminate the error caused by the "backlash" of the thread during operation and the wear of the thread during operation.
Method used
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Embodiment 1
[0011] see figure 1 , the device of the present invention consists of a surface plasmon resonance sensor (1), two sets of connecting rods (2-3, 4-5), angular contact ball bearings (6), a driver (7) and a control system (8), the driver (7) Choose linear motor or nano-ceramic motor, control system (8) Adopt PCI bus motion control card, drive based on Mint structure language, can make the motor produce linear motion of 0.1-10mm / s, positioning accuracy reaches 100nm, angular contact ball The bearings are arranged back to back (6) and used in pairs to minimize the clearance of the bearings. The driver (7) connects two sets of connecting rods (2-3, 4-5) through angular contact ball bearings (6) , the lengths of connecting rods (2) and (3) are equal, the lengths of connecting rods (4) and (5) are equal, the lengths of connecting rods (2) and (3) are greater than the lengths of connecting rods (4) and (5), the angle The contact ball bearing (6) is directly connected with the connecti...
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The invention provides an angle scanning device which comprises a surface plasma resonance sensor, two groups of connecting rods, angular contact ball bearings, a driver and a control system. The angular contact ball bearings are arranged back to back and used in pairs, the lengths of the connecting rods of the two groups are different, but the lengths of the connecting rods in each group are equal, the bearings are directly connected with the connecting rods, the connecting rods are connected with the prism base of the surface plasma resonance sensor by the bearings, and the other end of theconnecting rods is connected with the driver. The invention eliminates the back clearance phenomenon during the running process of the mechanism and the error generated by abrasion in principle, thereby thoroughly overcoming the defects of poor positioning accuracy and back clearance of the original mechanism and realizing the accurate angle scanning. The invention has reasonable design, compact and simple structure and convenient operation, and is not only suitable for the surface plasma resonance detector, but also can be used for a surface plasma resonance imager.
Description
technical field [0001] The invention belongs to the technical field of detection, and relates to a novel high-precision angle scanning device for a surface plasmon resonance sensor and an application thereof. Background technique [0002] Surface Plasmon Resonance (SPR) is a resonant wave that is excited by incident electromagnetic waves and exists in the charge density vibration on the interface between metal and dielectric. The incident angle or wavelength at this time is called the resonance angle and resonance wavelength, respectively. Since the resonance angle or resonance wavelength is very sensitive to the change of the refractive index of the medium close to the surface of the metal thin film, real-time and non-destructive optical detection of the sample can be realized accordingly. Because SPR has the characteristics of real-time monitoring of the dynamic process of the reaction, small size, high resolution, no labeling, and strong anti-electromagnetic interference...
Claims
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IPC IPC(8): G01N21/55G01N21/41G01N21/552
Inventor 金伟牟颖金钦汉张莹周超
Owner ZHEJIANG UNIV