CN203551460U - Novel high-accuracy optical rotation measurement device - Google Patents
Novel high-accuracy optical rotation measurement device Download PDFInfo
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- CN203551460U CN203551460U CN201320766753.4U CN201320766753U CN203551460U CN 203551460 U CN203551460 U CN 203551460U CN 201320766753 U CN201320766753 U CN 201320766753U CN 203551460 U CN203551460 U CN 203551460U
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Abstract
Provided is a novel high-accuracy optical rotation measurement device. According to the measurement device, a laser diode temperature controller is used for enabling a laser to keep a constant temperature. After passing through the linearly polarized light generated by a polarized light generation device and then passing through a sample pool, the laser light generated by the laser is split into two beams of linearly polarized light by a polarized light beam splitting device, two light receiving devices with the same characteristics are used for receiving the light, a data collecting and processing system is used for obtaining the light intensity information of the two beams of light, and the optical rotation angle is obtained through calculations and then sent to a liquid crystal display module to be displayed. The measurement device does not require any mechanical rotating devices, no mechanical abrasion exists, and the measurement device is small in size, fast in measurement speed, high in accuracy, and good in repeatability after long-term use, can be used for detecting deep-color high-concentration liquid, and can meet the requirements for industrial on-line measurement.
Description
Technical field
The utility model relates to a kind of polarimeter, belongs to technical field of photoelectric detection, is specifically related to a kind of measurement mechanism of measuring optical activity.
Background technology
When linearly polarized light is by after optically active compounds, plane of polarization will be rotated an angle, the concentration of the optically-active characteristic of this angle and optical active substance, the optical active substance light path that polarized light passes through, optical active substance is proportional, and at this moment polarized light just can not be all through the analyzer paralleling with polarizer rib axle.Only have the analyzer also to rotate after identical with it angle, the linearly polarized light being rotated could pass through completely.Observe the angle that the index dial that carries on analyzer rotates, be the optical activity of this optically active substance.For the active organism of tool, for example sugar juice, tartrate, thousands of kinds of materials of turpentine wet goods, can measure by surveying optical activity their concentration, so polariscopy is being produced and can in scientific research, all had great importance.
Present polarimeter generally utilizes angle compensation principle to measure, first the method adjusts analyzer when there is no setting-out product, make it and polarizer quadrature, be that output intensity is 0, then in the middle of the polarizer and analyzer, put into sample, rotation analyzer, making emergent light is zero again, the differential seat angle of twice rotation is the optical activity of sample.Current spinning solution is generally to adopt the rotation of control step motor to carry out, certainly exist like this and measure next angle precision and the segmentation Angular correlation of stepper motor, repeatability is relevant with wearing quality with the machining precision of gear, and mechanical velocity of rotation is slow, especially for the large liquid of optical activity, the time of cost is long, is subject to light intensity variation and the measurement that brings is inaccurate.Also there is scholar to propose to utilize polarized light beam splitting method to measure, but utilize laser with fixed wavelength to do light source, bulky complex structure as helium-neon laser.The utility model utilizes temperature controlled diode laser as light source, utilizes high precision heat-insulation system to make wavelength stabilized laser, thereby obtains high-precision optically-active measured value.
Summary of the invention
The purpose of this utility model is to provide a kind of optically-active measuring accuracy that can avoid mechanical rotation to bring not high, poor repeatability, the complex structure that helium-neon laser etc. bring, the shortcoming such as bulky, can be fast, a kind of optically-active measurement mechanism of high precision Measurement accuracy optically-active.
the technical scheme that the utility model adopts is:.
Optically-active angle measurement unit of the present utility model comprises laser diode, laser diode temperature controller, polarized light generation device, sample cell, polarized light beam splitting device, optical pickup apparatus, data acquisition processing system, LCD MODULE.Described temperature control equipment utilization electricity refrigeration module is controlled the temperature of laser diode, the light beam that laser diode produces obtains a branch of polarized light through described polarized light generation device, polarization light is after sample cell, through described polarized light beam splitting device, form two bundle polarized lights, this two bundles polarized light is received respectively by described optical pickup apparatus respectively, then by described data collector, obtain the strength information of two-beam, utilize Single Chip Microcomputer (SCM) system to show by drawing the LCD MODULE described in optical value utilization after calculating.
Described laser diode temperature controller comprises TEC semiconductor refrigerating piece, temperature-adjusting circuit and Single Chip Microcomputer (SCM) system;
Described polarized light generation device comprises linear polarizer and light shaping device;
Described optical pickup apparatus comprises two high precision photo-detectors that characteristic is identical;
Described data acquisition processing system comprises photoelectric switching circuit, A/D Acquisition Circuit and single-chip microcomputer and data processing software.
It is characterized in that comprising step as follows:
(1) utilize laser diode temperature controller to make the temperature stabilization of laser tube, to obtain the laser of frequency stabilization;
(2) utilize laser diode to produce laser, laser forms a branch of linearly polarized light after linear polarization system;
(3) linearly polarized light by testing liquid in sample cell after, the certain angle of polarized light deflection that the optically-active characteristic of liquid can make (2) to form;
(4) form the orthogonal polarized light of two bundle direction of vibration after inciding polarized light beam splitting device by the polarized light after testing liquid;
(5) utilize 2 identical high-precision photo-detectors of characteristic to receive two bunch polarized lights, and by A/D Acquisition Circuit, obtain the strength information of two-beam;
(6) Single Chip Microcomputer (SCM) system is calculated the strength information of two-beam to obtain optically-active angle information, and shows by liquid crystal display device.
The beneficial effects of the utility model are:
1, utilize laser diode temperature controller to carry out constant temperature laser diode, make Wavelength stabilized, thereby can obtain high-precision optically-active measured value.
2, utilize laser diode as polarized light source, LASER Light Source volume is reduced greatly, easily make equipment miniaturization, and reduce costs; Easily obtain the laser of different wave length, to adapt to different measurement needs; Can obtain cheaply the light source of higher-wattage, for concentration, high or saturate fluid sample, more easily see through, traditional polarimeter is non-detectable also can be detected easily.
3, avoided that the speed that traditional polarimeter mechanical rotation brings is slow, accuracy and the poor problem of reproduction degree, speed is fast, accuracy and reappearance are better, can be applied in the on-line quick detection of the optically-active angle of commercial production kind.
4, utilize 2 photodetectors that characteristic is identical, avoided the impact of light source fluctuation, result of detection is more accurate.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Optically-active angle measurement unit of the present utility model comprises laser diode temperature controller (1), laser diode (2), polarized light generation device (3), sample cell (4), polarized light beam splitting device (5), optical pickup apparatus (6,7), data acquisition processing system (8), LCD MODULE (9).System is built according to shown in Fig. 1, and build process is noted the collimation of light path.
The utility model is as follows to the measurement detailed process of optically-active angle:
Laser diode temperature controller (1) carries out constant temperature to laser instrument (2), the linearly polarized light that the laser that laser instrument (2) produces produces through polarized light generation device (3) is by after sample cell (4), through polarized light beam splitting device (5), be divided into two bunch polarized lights, with the optical pickup apparatus (6,7) of two identical characteristics, receive, utilize data acquisition processing system (8) to obtain the intensity signal of two-beam, by calculating, obtain optically-active angle, send LCD MODULE (9) to show.
Above-mentioned embodiment does not limit the technical solution of the utility model in any form, and the technical scheme that the mode of the equal replacement of every employing or equivalent transformation obtains all drops on protection domain of the present utility model.
Claims (3)
1. a novel high-precision optically-active measurement mechanism.
Described optically-active angle measurement unit comprises laser diode, the temperature controller of laser diode, polarized light generation device, sample cell, polarized light beam splitting device, optical pickup apparatus, data acquisition processing system, LCD MODULE, described temperature control equipment utilization electricity refrigeration module is controlled the temperature of laser diode, the light beam that laser diode produces obtains a branch of polarized light through described polarized light generation device, polarization light is after sample cell, through described polarized light beam splitting device, form two bundle polarized lights, this two bundles polarized light is accepted respectively by two described silicon photocells respectively, then by described data collector, obtain the strength information of two-beam, being transferred to described data processing unit Single Chip Microcomputer (SCM) system shows by drawing the LCD MODULE described in optical value utilization after calculating.
Described laser diode temperature controller comprises TEC semiconductor refrigerating piece, temperature-adjusting circuit and Single Chip Microcomputer (SCM) system;
Described polarized light generation device comprises linear polarizer and light shaping device;
Described optical pickup apparatus comprises two identical high-precision photo-detectors;
Described data acquisition processing system comprises photoelectric switching circuit, A/D Acquisition Circuit and single-chip microcomputer and data processing software.
It is characterized in that comprising step as follows:
(1) utilize laser diode temperature controller to make the temperature stabilization of laser tube, to obtain the laser of frequency stabilization;
(2) utilize laser diode to produce laser, laser forms a branch of linearly polarized light after linear polarization system;
(3) linearly polarized light by testing liquid in sample cell after, the certain angle of polarized light deflection that the optically-active characteristic of liquid can make (2) to form;
(4) form the orthogonal polarized light of two bundle direction of vibration after inciding polarized light beam splitting device by the polarized light after testing liquid;
(5) utilize 2 identical high-precision photo-detectors of characteristic to receive two bunch polarized lights, and by A/D Acquisition Circuit, obtain the strength information of two-beam;
(6) Single Chip Microcomputer (SCM) system is calculated the strength information of two-beam to obtain optically-active angle information, and shows by liquid crystal display device.
2. according to the high precision optically-active measurement mechanism described in right 1, be further characterized in that laser and laser temperature controller.
3. according to the high precision optically-active measurement mechanism described in right 1, be further characterized in that laser instrument is diode laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320766753.4U CN203551460U (en) | 2013-11-29 | 2013-11-29 | Novel high-accuracy optical rotation measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320766753.4U CN203551460U (en) | 2013-11-29 | 2013-11-29 | Novel high-accuracy optical rotation measurement device |
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| CN203551460U true CN203551460U (en) | 2014-04-16 |
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| CN201320766753.4U Expired - Fee Related CN203551460U (en) | 2013-11-29 | 2013-11-29 | Novel high-accuracy optical rotation measurement device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052594A (en) * | 2016-05-10 | 2016-10-26 | 河南师范大学 | Method of measuring magneto optic fiber rotation angle by utilizing fiber grating laser optical beat frequency |
| CN110388995A (en) * | 2019-07-02 | 2019-10-29 | 上海交通大学 | High-accuracy optical temperature monitoring device and method based on the weak measure theory of quantum |
| CN112213266A (en) * | 2020-09-29 | 2021-01-12 | 湖北鑫英泰系统技术股份有限公司 | Laser monitoring device with laser instrument function that adjusts temperature |
| CN113686444A (en) * | 2021-06-21 | 2021-11-23 | 复旦大学 | Light beam polarization change measuring device and measuring method thereof |
| CN115060659A (en) * | 2022-08-18 | 2022-09-16 | 天津大学 | Optical rotation angle measuring method based on proportional method and rapid digital phase-locked demodulation algorithm |
-
2013
- 2013-11-29 CN CN201320766753.4U patent/CN203551460U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052594A (en) * | 2016-05-10 | 2016-10-26 | 河南师范大学 | Method of measuring magneto optic fiber rotation angle by utilizing fiber grating laser optical beat frequency |
| CN110388995A (en) * | 2019-07-02 | 2019-10-29 | 上海交通大学 | High-accuracy optical temperature monitoring device and method based on the weak measure theory of quantum |
| CN110388995B (en) * | 2019-07-02 | 2020-07-14 | 上海交通大学 | Optical high-precision temperature monitoring device and method based on quantum weak measurement theory |
| CN112213266A (en) * | 2020-09-29 | 2021-01-12 | 湖北鑫英泰系统技术股份有限公司 | Laser monitoring device with laser instrument function that adjusts temperature |
| CN112213266B (en) * | 2020-09-29 | 2021-05-14 | 湖北鑫英泰系统技术股份有限公司 | Laser monitoring device with laser instrument function that adjusts temperature |
| CN113686444A (en) * | 2021-06-21 | 2021-11-23 | 复旦大学 | Light beam polarization change measuring device and measuring method thereof |
| CN113686444B (en) * | 2021-06-21 | 2023-01-03 | 复旦大学 | Light beam polarization change measuring device and measuring method thereof |
| CN115060659A (en) * | 2022-08-18 | 2022-09-16 | 天津大学 | Optical rotation angle measuring method based on proportional method and rapid digital phase-locked demodulation algorithm |
| CN115060659B (en) * | 2022-08-18 | 2022-10-25 | 天津大学 | Optical rotation angle measuring method based on proportional method and fast digital phase-locked demodulation algorithm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20181129 |