CN113466152A - Light condensation adjusting method of intelligent closestool spectrum detection device - Google Patents
Light condensation adjusting method of intelligent closestool spectrum detection device Download PDFInfo
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- CN113466152A CN113466152A CN202110762803.0A CN202110762803A CN113466152A CN 113466152 A CN113466152 A CN 113466152A CN 202110762803 A CN202110762803 A CN 202110762803A CN 113466152 A CN113466152 A CN 113466152A
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000001228 spectrum Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000009833 condensation Methods 0.000 title claims description 7
- 230000005494 condensation Effects 0.000 title claims description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 230000004075 alteration Effects 0.000 claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000011156 evaluation Methods 0.000 claims description 29
- 238000005457 optimization Methods 0.000 claims description 13
- 239000008280 blood Substances 0.000 claims description 9
- 210000004369 blood Anatomy 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000012937 correction Methods 0.000 abstract description 2
- 230000009897 systematic effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 201000010099 disease Diseases 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 5
- 238000007654 immersion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0076—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a detector
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0095—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ultraviolet radiation
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Abstract
The invention relates to a light-gathering adjusting method of an intelligent closestool spectrum detection device, wherein the spectrum detection device comprises an excitation light source, a lens group and a light filter, the lens group adopts an optical system to perform light-gathering adjustment, and the technical scheme is adopted to perform systematic spherical aberration correction on the structure of the lens, so that a lens group structure with strong light collection capability and good focusing effect is obtained.
Description
Technical Field
The invention relates to the field of spectrum detection devices of intelligent toilets, in particular to a light condensation adjusting method of the spectrum detection device of the intelligent toilet.
Background
With the improvement of living standard, people are concerned about their health condition more and more, and the requirement for detection means is also higher and higher. At present, through the examination and detection of the excrement and urine, a plurality of diseases of people can be judged, and the detection is noninvasive and painless, so that the detection is more and more widely applied to clinical detection nowadays. Biochemical and clinical medical studies have also shown that: almost all of the resulting diseases find markers in the excreta.
Most of lenses of the intelligent closestool spectrum detection device in the current market adopt Fresnel lenses to amplify optical signals. Fresnel lens (Fresnel lenses): the screw lens is mostly a thin sheet formed by injecting and pressing polyolefin materials, one surface of the lens is a smooth surface, the other surface of the lens is recorded with concentric circles from small to large, the texture of the screw lens is designed according to the requirements of light interference and interference, relative sensitivity and receiving angle, the thickness of the lens is about 1mm, the cost is much lower than that of a common convex lens, and the screw lens has the characteristics of large area, thin thickness and long detection distance.
The stool blood amount in the excrement of early stage of disease is very little, and the light signal that produces is very weak, and the resolution ratio of intelligent closestool spectrum detection device on the existing market can not satisfy the detection of early stage disease, namely the fresnel lens resolution ratio of spectrum detection device can not satisfy the detection of early stage disease. As shown in fig. 1 and fig. 2, the aberration of the lens under the conventional fresnel lens initial structure is large, which is as high as ± 2500-3000um, and it can be seen from the point diagram of the image plane that the light collection capability of the lens is not strong, the focusing effect is not good, the spot radius is about 2339.22um, and the lens does not meet the use requirement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the light condensation adjusting method of the intelligent closestool spectrum detection device, which has strong light collection capability and good focusing effect.
The invention relates to a light-gathering adjusting method of an intelligent closestool spectrum detection device, wherein the spectrum detection device comprises an excitation light source, a lens group and a light filter, wherein the excitation light source excites an optical signal of blood in excrement, the lens group collects the optical signal, and the optical signal is screened and transmitted to an intelligent closestool signal processing center through the light filter; the lens group adopts an optical system to carry out condensation adjustment, and the method comprises the following operation steps:
s1, establishing an evaluation function of RMS-Spot Radius-Centroid by using an evaluation function editor, and correcting the on-axis point spherical aberration of the lens group, wherein the RMS is root mean square, the Spot Radius is the Radius of a light Spot, and the Centroid is a Centroid point;
s2, global optimization is carried out on the optical system by using a global optimization method and multiple starting points, a lens group with small evaluation function spherical aberration evaluation and small objective lens aberration is found, and multiple groups of lens group parameters are obtained;
and S3, carrying out modeling analysis on the optimized multiple groups of lens group parameters, and comparing and optimizing the effects of the front lens group and the rear lens group through a point chart and an aberration curve to obtain the optimal lens group.
Further, the step S1 includes the following settings:
s1-1, selecting and setting the glass thickness boundary condition as 'min is 1, max is 10 and the boundary thickness is 1' in the evaluation function editor, wherein min is the minimum value and max is the maximum value;
s1-2, selecting and setting air interval boundary conditions in the evaluation function editor to be 'min is 1, max is 10, and the boundary thickness is 1', wherein min is the minimum value, and max is the maximum value;
s1-3, adding optimization operands of SPHA and LONA in the evaluation function editor, wherein the optimization operands are respectively set as "Target 0 and Weight 1", wherein SPHA is a spherical aberration coefficient, LONA is axial aberration/defocus, Target is a Target, and Weight is a Weight;
s1-4, selecting and setting the radius and the thickness of the lens surface in the evaluation function editor as variables;
s1-5, selecting the glass material of the first lens surface of the lens group in the evaluation function editor to be set as a variable.
Further, an excitation light source of the spectrum detection device is ultraviolet light of 260 nm.
Further, the optical filter of the spectrum detection device is a 310nm ultraviolet narrow-band optical filter.
Compared with the prior art, the invention has the following beneficial effects:
1. performing systematic spherical aberration correction on the structure of the lens by adopting an evaluation function in an optical system, thereby obtaining a lens structure with strong light collection capability and good focusing effect;
2. obtaining an optimal lens group by adopting a global optimization search method;
3. when the blood is irradiated by adopting ultraviolet light of 260nm as an excitation light source, the blood has a unique peak at the position of the spectrum of about 310nm, and the spectrum detection can be carried out on different concentrations of the blood;
4. and (3) screening the optical signals of the blood by adopting a 310nm ultraviolet narrow-band filter, and filtering the optical signals of other excrement.
Drawings
The accompanying drawings, which are described herein to provide a further understanding of the application, are included in the following description:
FIG. 1 is a phase difference diagram of a conventional Fresnel lens structure;
FIG. 2 is a dot-column diagram of a conventional Fresnel lens structure;
FIG. 3 is a view of a Fresnel lens set adjusted according to the method of the present invention;
FIG. 4 is a diagram illustrating the phase difference of the Fresnel lens set structure adjusted by the method of the present invention;
FIG. 5 is a point diagram of the Fresnel lens set structure adjusted by the method of the present invention.
Detailed Description
Referring to fig. 3 to 5, in an embodiment, the invention is a light-gathering adjusting method of an intelligent toilet bowl spectrum detection device, where the spectrum detection device includes an excitation light source, a lens group, and a filter, where the excitation light source excites an optical signal of blood in excrement, the lens group collects the optical signal, and the optical signal is filtered by the filter and transmitted to an intelligent toilet bowl signal processing center; the lens group adopts an optical system to carry out condensation adjustment, and the method comprises the following operation steps:
s1, establishing an evaluation function of RMS-Spot Radius-Centroid by using an evaluation function editor, and correcting the on-axis point spherical aberration of the lens group, wherein the RMS is root mean square, the Spot Radius is the Radius of a light Spot, and the Centroid is a Centroid point;
further, the step S1 includes the following settings:
s1-1, selecting and setting the glass thickness boundary condition as 'min is 1, max is 10 and the boundary thickness is 1' in the evaluation function editor, wherein min is the minimum value and max is the maximum value;
s1-2, selecting and setting air interval boundary conditions in the evaluation function editor to be 'min is 1, max is 10, and the boundary thickness is 1', wherein min is the minimum value, and max is the maximum value;
s1-3, adding optimization operands of SPHA and LONA in the evaluation function editor, wherein the optimization operands are respectively set as "Target 0 and Weight 1", wherein SPHA is a spherical aberration coefficient, LONA is axial aberration/defocus, Target is a Target, and Weight is a Weight;
s1-4, selecting and setting the radius and the thickness of the lens surface in the evaluation function editor as variables;
s1-5, selecting the glass material of the first lens surface of the lens group in the evaluation function editor to be set as a variable.
S2, global optimization is carried out on the optical system by using a global optimization method and multiple starting points, a lens group with small evaluation function spherical aberration evaluation and small objective aberration is found, and a plurality of groups of lens group parameter tables are obtained as follows:
and S3, S3, carrying out modeling analysis on the optimized multiple groups of lens group parameters, and comparing and optimizing the effects of the front lens group and the rear lens group through a point chart and an aberration curve to obtain the optimal lens group.
The spherical aberration evaluation of the obtained optimal lens group is only 2.224E-007, the lens aberration is small, the coordinates of an aberration diagram are +/-10 um, the numerical value floats in the range of +/-2.8 um, the light collecting capacity is remarkably improved, the radius of a light spot is about 4.753um, the size of an Airy spot is 0.3278um, meanwhile, the structure of the lens is compact, the total length is about 69.7mm, and the use requirement is met.
Further embodiments: an excitation light source of the spectrum detection device is ultraviolet light with the wavelength of 260 nm.
Further embodiments: the optical filter of the spectrum detection device is a 310nm ultraviolet narrow-band optical filter.
The working principle is as follows:
the numerical aperture characterizes the condensing power of the objective, the enhancement of the condensing power of the objective can enhance the resolution thereof, and the Numerical Aperture (NA) is the product of the sine of half the aperture angle (2 α) and the refractive index (n) of the medium between the lens and the object to be measured:
NA＝nsinα (1)
the aperture angle is the angle formed by the connection of an object point on the optical axis and the effective diameter of the objective front lens, and is also called as the lens opening angle. As the aperture angle becomes larger, the corresponding light flux entering the lens becomes larger, and the aperture angle is inversely proportional to the distance of the focal point and directly proportional to the effective diameter of the lens. In a microscope system, the aperture angle is fixed for a given objective lens, if the NA value is increased to improve the resolution of the objective lens, the adopted measures can only be increasing the refractive index of a medium, and the corresponding measures are a water immersion objective lens and an oil immersion objective lens.
The numerical aperture determines the resolution of the objective lens, and the specific relationship is as follows:
the specific resolution is determined by the refractive index of the medium and the objective lens used in practice, and in practical blood testing applications, some adjustments can be made based on the resolution.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A light-gathering adjusting method of an intelligent closestool spectrum detection device comprises an excitation light source, a lens group and a light filter, wherein the excitation light source excites an optical signal of blood in excrement, the lens group collects the optical signal, and the optical signal is screened and transmitted to an intelligent closestool signal processing center through the light filter; the method is characterized in that: the lens group adopts an optical system to carry out condensation adjustment, and the method comprises the following operation steps:
s1, establishing an evaluation function of RMS-Spot Radius-Centroid by using an evaluation function editor, and correcting the on-axis point spherical aberration of the lens group, wherein the RMS is root mean square, the Spot Radius is the Radius of a light Spot, and the Centroid is a Centroid point;
s2, global optimization is carried out on the optical system by using a global optimization method and multiple starting points, a lens group with small evaluation function spherical aberration evaluation and small objective lens aberration is found, and multiple groups of lens group parameters are obtained;
and S3, carrying out modeling analysis on the optimized multiple groups of lens group parameters, and comparing and optimizing the effects of the front lens group and the rear lens group through a point chart and an aberration curve to obtain the optimal lens group.
2. The method for adjusting the light concentration of the intelligent toilet bowl spectrum detection device according to claim 1, is characterized in that: the step S1 includes the following settings:
s1-1, selecting and setting the boundary conditions of the glass thickness in an evaluation function editor to be min =1, max =10 and the boundary thickness is 1, wherein min is the minimum value and max is the maximum value;
s1-2, selecting and setting air interval boundary conditions of min =1, max =10 and boundary thickness of 1 in the evaluation function editor, wherein min is the minimum value and max is the maximum value;
s1-3, adding optimization operands of SPHA and LONA in the evaluation function editor, wherein the optimization operands are set as Target =0 and Weight =1, the SPHA is a spherical aberration coefficient, the LONA is axial aberration/defocus, the Target is a Target, and the Weight is a Weight;
s1-4, selecting and setting the radius and the thickness of the lens surface in the evaluation function editor as variables;
s1-5, selecting the glass material of the first lens surface of the lens group in the evaluation function editor to be set as a variable.
3. The method for adjusting the light concentration of the intelligent toilet bowl spectrum detection device according to claim 1, is characterized in that: an excitation light source of the spectrum detection device is ultraviolet light with the wavelength of 260 nm.
4. The method for adjusting the light concentration of the intelligent toilet bowl spectrum detection device according to claim 1, is characterized in that: the optical filter of the spectrum detection device is a 310nm ultraviolet narrow-band optical filter.
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| CN202110762803.0A CN113466152A (en) | 2021-07-06 | 2021-07-06 | Light condensation adjusting method of intelligent closestool spectrum detection device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011284A (en) * | 1990-03-22 | 1991-04-30 | Kaiser Optical Systems | Detection system for Raman scattering employing holographic diffraction |
| CN1844922A (en) * | 2005-04-07 | 2006-10-11 | 希森美康株式会社 | Blood analyzer, sample analyzer, and flow cytometer |
| CN110823854A (en) * | 2019-12-12 | 2020-02-21 | 中国科学院长春光学精密机械与物理研究所 | Fluorescence spectrum detection system of microorganism |
| CN111857004A (en) * | 2020-07-28 | 2020-10-30 | 泉州师范学院 | Intelligent closestool capable of monitoring human health in real time and monitoring method thereof |
-
2021
- 2021-07-06 CN CN202110762803.0A patent/CN113466152A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011284A (en) * | 1990-03-22 | 1991-04-30 | Kaiser Optical Systems | Detection system for Raman scattering employing holographic diffraction |
| CN1844922A (en) * | 2005-04-07 | 2006-10-11 | 希森美康株式会社 | Blood analyzer, sample analyzer, and flow cytometer |
| CN110823854A (en) * | 2019-12-12 | 2020-02-21 | 中国科学院长春光学精密机械与物理研究所 | Fluorescence spectrum detection system of microorganism |
| CN111857004A (en) * | 2020-07-28 | 2020-10-30 | 泉州师范学院 | Intelligent closestool capable of monitoring human health in real time and monitoring method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 罗刚银;王弼陡;缪鹏;王磊;田浩然;钱庆;王钟周;: "近红外荧光扫描用共聚焦光学系统设计", 激光与红外, no. 05, pages 539 * |
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Application publication date: 20211001 |