CN111562224B - Analyzer image enhancement device and method for optically active substances - Google Patents
Analyzer image enhancement device and method for optically active substances Download PDFInfo
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- CN111562224B CN111562224B CN202010419468.XA CN202010419468A CN111562224B CN 111562224 B CN111562224 B CN 111562224B CN 202010419468 A CN202010419468 A CN 202010419468A CN 111562224 B CN111562224 B CN 111562224B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
- G01N21/211—Ellipsometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The invention relates to an analyzer image enhancement device and method aiming at optical rotation substances, which are characterized in that: the device includes light source, polarizer, analyzer and image device, the polarizer sets up before the material that awaits measuring, the analyzer sets up behind the material that awaits measuring, the light source sets up the place ahead at the polarizer, the polarizer with the polarization direction of analyzer is the same, image device sets up the rear at the analyzer, and the method becomes polarized light after making the light that the light source sent become behind the polarizer, makes the light that passes the material that awaits measuring reachd image device through the analyzer again, and the last formation of image light intensity contrast ratio of image device is more obvious, and this device and method have effectively prevented because the material that awaits measuring and the low formation of image that causes of background contrast ratio incomplete, missing and mismeasure the present image and have improved the formation of image contrast ratio and the definition of the material that awaits measuring.
Description
Technical Field
The invention relates to the technical field of automatic optical analysis of plant fiber fibers, in particular to an analyzer image enhancement device and method aiming at optical activity substances.
Background
The existing plant fiber shape and length optical automatic analyzer adopts two imaging methods: one is to irradiate the fiber with polarized light based on the optical activity of the plant fiber and then detect the image with an analyzer placed in front of the imaging device. The purpose is to exclude interference from optically inactive substances such as bubbles, ink, etc. The other method is to irradiate the fiber with unpolarized natural light and use the absorption and scattering of the fiber to image.
In the two imaging modes, when the fiber wall of the measuring fiber is thin or the transparency of the fiber is high, the absorption capacity of the fiber to light is weakened, more light penetrates through the fiber to reach the imaging device, the difference between the imaging intensity and the background is reduced, and the imaging contrast is low.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention provides an analyzer image enhancement device for an optical rotation substance and an image enhancement method of the device, which can effectively improve the contrast intensity of imaging and improve the detection precision.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an analyzer image intensifier for an optically active substance, characterized in that: including light source, polarizer, analyzer and imaging device, the polarizer sets up before the material that awaits measuring, the analyzer sets up behind the material that awaits measuring, the light source sets up the place ahead at the polarizer, the polarizer with the polarization direction of analyzer is the same, imaging device sets up the rear at the analyzer, the polarizer is used for polarizing the light of light source, makes the light of light source become polarized light, the analyzer is arranged in acting on the light that is equipped with behind the material that awaits measuring of optical rotation and acts on in the material that awaits measuring and the outer light that does not have behind the material of optical rotation and carries out the polarization, imaging device is used for imaging the light behind the analyzer, and presents the light intensity contrast ratio of the formation of image of the light behind the material that awaits measuring that possesses optical rotation and the material that does not possess optical rotation through polarizer and analyzer.
Further, the polarizer and the analyzer are arranged in a non-orthogonal mode with the same polarization direction.
Further, the polarizer and the analyzer use two linear polarizers with the same polarization direction, two left-handed circular polarizers with the same polarization direction, two right-handed circular polarizers with the same polarization direction, or two elliptical polarization optical elements with the same polarization direction.
Further, a condenser for condensing the light of the light source to the polarizer is further provided at any position between the light source and the substance to be measured.
Further, an optical lens is arranged at any position between the substance to be detected and the imaging device and used for imaging light rays.
Further, the light source adopts monochromatic light, polychromatic light or natural light.
The imaging method of the analyzer image intensifier for an optically active substance is characterized by comprising the following steps:
step 4, enabling the light passing through the substance to be detected with optical rotation and the light passing through the substance without optical rotation in the step 3 to pass through the analyzer, wherein because the polarization directions of the analyzer and the polarizer are the same, the light after being emitted through the substance to be detected with optical rotation does not pass through the analyzer, the light intensity and the polarization direction of the light after passing through the substance without optical rotation are not changed, and the light intensity and the polarization direction after passing through the analyzer are also not changed;
and 5, imaging the light passing through the analyzer on an imaging device, wherein the theoretical light intensity of the light passing through the substance to be detected with optical rotation on the imaging device is zero after passing through the analyzer, and the theoretical light intensity of the light passing through the substance without optical rotation on the imaging device is unchanged after passing through the analyzer.
Further, in step 1, a condenser is further disposed at any position between the light source and the substance to be measured, and the condenser condenses light of the light source to the polarizer.
Further, in step 1, the polarizer and the analyzer use two linear polarizers having the same polarization direction, or two left-handed circular polarizers having the same polarization direction, or two right-handed circular polarizers having the same polarization direction, and correspondingly, when the two linear polarizers are used, the polarized light is linearly polarized light, when the left-handed circular polarizer is used, the polarized light is left-handed circularly polarized light, when the right-handed circular polarizer is used, the polarized light is right-handed circularly polarized light, when the left-handed elliptical polarizing optical element is used, the polarized light is left-handed elliptical polarizing optical element, and when the right-handed elliptical polarizing optical element is used, the polarized light is right-handed elliptical polarizing optical element.
Further, the light source adopts monochromatic light, polychromatic light or natural light.
The technical scheme has the following beneficial effects:
1. the measurement accuracy is improved, and incomplete imaging, missing detection and false detection of the image caused by low contrast of the substance to be measured and the foreground are effectively prevented.
2. The measuring range is expanded, and the lower limit of the width of the detected substance is improved.
3. The functions of the instrument are expanded, and the detection of the fibril can provide more functions for the existing instrument, such as the measurement of the content of the fibril and the rate of the fibril.
4. After the instrument adopts the method, the measurement of the object without the optical rotation characteristic has no or only little influence.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The use of the terms herein are exemplary only, and are not limiting. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an analyzer image enhancement device for an optical rotation substance includes a light source 1, a polarizer 2, an analyzer 3 and an imaging device 4, where the polarizer 2 is disposed in front of a substance 7 to be detected, and the analyzer 3 is disposed behind the substance 7 to be detected, the fiber to be detected used by the substance 7 to be detected in this embodiment is also applicable to detection of other substances to be detected having optical rotation, such as particles having optical rotation, etc., the following description will be given in detail by taking the fiber as an example, the particles or other substances having optical rotation are the same as the fiber in terms of working principle, the light source 1 and the polarizer may be integrated or separated, and may be a light source, an imaging component or a combination thereof having a polarizer function, and the light source 1 employs monochromatic light, polychromatic light or natural light.
The polarizer 2 is used for polarizing the light of the light source 1, so that the light of the light source 1 becomes polarized light, and then the polarized light can be absorbed by the fiber when passing through the fiber to be measured. If the fiber to be measured has optical activity, the polarization direction of the light can be changed, and the intensity and the deflection direction of the light passing through the fiber to be measured are changed.
The analyzer 3 is used for analyzing light acting on a fiber to be measured having optical rotation and light acting on a substance having no optical rotation in and out of the fiber to be measured.
The polarizer 2 and the analyzer 3 have the same polarization direction, and particularly, the polarizer 2 and the analyzer 3 are arranged in a non-orthogonal manner with the same polarization direction. For example, the polarizer 2 and the analyzer 3 may adopt two linear polarizers with the same polarization direction, two left-handed circular polarizers with the same polarization direction, two right-handed circular polarizers with the same polarization direction, or two elliptical polarization optical elements with the same polarization direction, when the light from the polarizer is linearly polarized light, the polarizer and the analyzer may adopt linear polarizers, when the light from the polarizer is left-handed circularly polarized light or right-handed circularly polarized light, the polarizer and the analyzer may simultaneously adopt left-handed circular polarizers or right-handed circular polarizers, when the light from the polarizer is left-handed elliptically polarized light or right-handed elliptically polarized light, the polarizer and the analyzer may simultaneously adopt left-handed elliptically polarized polarizers or right-handed elliptically polarized polarizers, or polarization optical elements or devices capable of achieving the above effects.
The imaging device 4 is arranged behind the analyzer 3, the imaging device 4 is used for imaging the light passing through the analyzer 3, and the polarizer 2 and the analyzer 3 are used for showing the light intensity contrast of the imaging of the light passing through the fiber 7 to be measured with optical rotation and the substance without optical rotation. An optical lens 6 is further arranged between the substance to be detected and the imaging device 4 and used for imaging light, the optical lens can be integrated with the imaging device, and also can be independently arranged between the imaging device and the analyzer, or between the fiber to be detected and the analyzer, and in addition, the analyzer and the imaging device can be integrated together, or can be independently separated. Because the analyzer and the polarizer are arranged in the same direction, the light transmitted through the fiber to be detected is absorbed by the analyzer and cannot transmit through the analyzer due to the fact that the deflection angle of the light is different from that of the analyzer. The theoretical light intensity of the imaging device is zero or greatly reduced. The light which does not pass through the fiber to be detected is not absorbed, or the deflection direction of the light is not changed after the light passes through the substance without optical activity, so that the light can completely transmit through the analyzer. The light intensity reaching the imaging device is unchanged or less reduced. Therefore, the light rays finally form a remarkable light intensity difference on the imaging device after passing through the fiber to be measured with optical rotation and passing through the substance without optical rotation, and in addition, compared with background light, the light intensity contrast is also greatly enhanced.
In order to achieve a better imaging effect, a condenser 5 is further arranged between the light source 1 and the polarizer 2, the condenser 5 is used for condensing the light of the light source 1, and the condenser can be an optical component integrated with the light source, or an optical component integrated with the polarizer, or an optical component integrated with the light source and the polarizer.
An imaging method of an analyzer image intensifier for an optically active substance, comprising:
step 4, enabling the light passing through the substance 7 to be detected with optical rotation in the step 3 and the light passing through the substance 7 not with optical rotation to both pass through the analyzer 3, wherein because the polarization directions of the analyzer 3 and the polarizer 2 are the same, the light emitted after passing through the substance 7 to be detected with optical rotation cannot pass through the analyzer 3, the polarization direction of the light passing through the substance 7 not with optical rotation is not changed, and the light intensity and the polarization direction after passing through the analyzer 3 are also not changed;
and 5, imaging the light passing through the analyzer 3 on the imaging device 4, wherein the light intensity of the light passing through the substance 7 to be detected with optical rotation on the imaging device 4 after passing through the analyzer 3 is zero, and the light passing through the substance 7 without optical rotation on the imaging device 4 after passing through the analyzer 3 is unchanged, so that the light passing through the fiber to be detected with optical rotation and the substance without optical rotation finally form a remarkable light intensity difference on the imaging device, and in addition, compared with background light, the light intensity contrast is greatly enhanced.
In the method, the polarized light can be linearly polarized light or circularly polarized light, when the polarized light is linearly polarized light, the polarizer and the analyzer can adopt a linear polarizer, when the polarized light is left circularly polarized light, the polarizer and the analyzer can adopt a left circularly polarizer, when the polarized light is right circularly polarized light, the polarizer and the analyzer can adopt a right circularly polarizer, when the left elliptically polarized optical element is adopted, the polarized light is a left elliptically polarized optical element, and when the right elliptically polarized optical element is adopted, the polarized light is a right elliptically polarized optical element.
In addition, the method can be correspondingly realized through the device, and details are not repeated herein.
In conclusion, the using effect and the method which can be achieved by the device can improve the measuring precision, effectively prevent incomplete imaging, missing detection and error detection caused by low contrast of the substance to be measured 7 and the foreground, improve the imaging contrast of the substance to be measured, expand the measuring range, improve the lower limit of the width of the substance to be measured, provide more functions for the existing instrument for detecting the fine fibers, such as measurement of the content of the fine fibers and the fiber fineness ratio, and finally have no influence on the measurement of the object without the optical rotation characteristic after the device and the method are adopted.
The above-described embodiments are merely representative of the collective embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. The object to be measured includes not only the fiber but also all other objects having the property of rotating light. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (6)
1. An analyzer image intensifier for an optically active substance, characterized in that: the device comprises a light source, a polarizer, a polarization analyzer and an imaging device, wherein the polarizer is arranged in front of a substance to be detected, the polarization analyzer is arranged behind the substance to be detected, the light source is arranged in front of the polarizer, the polarization directions of the polarizer and the polarization analyzer are the same, the imaging device is arranged behind the polarization analyzer, the polarizer is used for polarizing the light of the light source to convert the light of the light source into polarized light, the polarization analyzer is used for analyzing the light acted on the substance to be detected with optical rotation and the light acted on the substances without optical rotation in and outside the substance to be detected, the imaging device is used for imaging the light passing through the polarization analyzer, and the polarizer and the polarization analyzer are used for presenting the light intensity contrast of the imaging of the light passing through the substance to be detected with optical rotation and the substance without optical rotation;
the polarizer and the analyzer are arranged in a non-orthogonal mode with the same polarization direction.
2. The analyzer image enhancing device for optically active substances according to claim 1, wherein: the polarizer and the analyzer adopt two linear polaroids with the same polarization direction, two left-handed circular polaroids with the same polarization direction, two right-handed circular polaroids with the same polarization direction, or two elliptical polarization optical elements with the same polarization direction.
3. The analyzer image enhancing device for optically active substances according to claim 1, wherein: a condenser is further provided at any position between the light source and the substance to be measured, the condenser condensing the light of the light source to the polarizer, the condenser being for condensing the light of the light source.
4. The analyzer image enhancing device for optically active substances according to claim 1, wherein: and an optical lens is arranged at any position between the substance to be detected and the imaging device and is used for imaging light rays.
5. The analyzer image enhancing device for optically active substances according to claim 1, wherein: the light source adopts monochromatic light, polychromatic light or natural light.
6. The imaging method of an analyzer image intensifier for an optically active substance according to any one of claims 1 to 5, characterized by comprising:
step 1, configuring a light source, a polarizer, a polarization analyzer and an imaging device, wherein the polarizer is arranged in front of a substance to be detected, the polarization analyzer is arranged behind the substance to be detected, the light source is arranged in front of the polarizer, the polarization directions of the polarizer and the polarization analyzer are the same, and the imaging device is arranged behind the polarization analyzer;
step 2, enabling the light of the light source to pass through the polarizer, polarizing the light of the light source by the polarizer, and enabling the light of the light source to be changed into polarized light;
step 3, the polarized light passes through the substance to be detected, the light intensity and the polarization direction of the polarized light after passing through the substance to be detected with optical rotation are changed, and the polarization direction of the polarized light passing through the substance without optical rotation in or out of the substance to be detected is unchanged;
step 4, enabling the light passing through the substance to be detected with optical rotation and the light passing through the substance without optical rotation in the step 3 to pass through the analyzer, wherein because the polarization directions of the analyzer and the polarizer are the same, the light after being emitted through the substance to be detected with optical rotation cannot pass through the analyzer, the light intensity and the polarization direction of the light after passing through the substance without optical rotation are not changed, the light intensity after passing through the analyzer is reduced, and the polarization direction is not changed;
and 5, imaging the light passing through the analyzer on an imaging device, wherein the theoretical light intensity of the light passing through the substance to be detected with optical rotation on the imaging device is zero after passing through the analyzer, and the theoretical light intensity of the light passing through the substance without optical rotation on the imaging device is unchanged after passing through the analyzer.
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| CN103424363A (en) * | 2013-07-31 | 2013-12-04 | 黑龙江大学 | Non-rotary optical rotation solution gauge and method for measuring specific rotation of optical rotation solution through gauge |
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| CN110132853A (en) * | 2019-04-11 | 2019-08-16 | 中国科学技术大学 | Rotatory dispersive measuring system and method based on pixel polarization camera |
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| CN103424363A (en) * | 2013-07-31 | 2013-12-04 | 黑龙江大学 | Non-rotary optical rotation solution gauge and method for measuring specific rotation of optical rotation solution through gauge |
| CN108526745A (en) * | 2018-06-27 | 2018-09-14 | 苏州瑞耀三维科技有限公司 | A kind of laser welded seam detection device based on magneto-optical sensor |
| CN110132853A (en) * | 2019-04-11 | 2019-08-16 | 中国科学技术大学 | Rotatory dispersive measuring system and method based on pixel polarization camera |
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