CN209474591U - A kind of hand-held compact oedema detection device based on near-infrared absorption - Google Patents
A kind of hand-held compact oedema detection device based on near-infrared absorption Download PDFInfo
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Abstract
The hand-held compact oedema detection device based on near-infrared absorption that the utility model discloses a kind of, comprising: for generating the near-infrared light source of specific band infrared light ultra-wide spectrum；Infrared light is divided into two bundles output and receives the two-way infrared light of return, forms the beam splitter of interference light after the two is merged；The reference arm of reference light is provided；It is incident upon in tested tissue after another way infrared light is focused, and receives the sample arm from the reflected infrared light of tested tissue；It receives the near infrared light after merging and is irradiated to light beam in CCD camera after transmission grating is by wavelength dispersion.The utility model estimates the ponding relative amount of tested tissue using the back-scattering light detected.
Description
Technical field
The utility model relates to oedema detection fields, and in particular to a kind of hand-held compact based on near-infrared absorption
Oedema detection device.
Background technique
With the improvement of living standards, along with the expensive of environmental degradation, people are to health problem growing interest.In real time
Non-invasive monitoring technology has the effects of screening monitoring, early detection, auxiliary diagnosis.Therefore highly sensitive, safe and harmless is all
The core of monitoring technology.For the oedema situation diagnosis of heart failure, renal failure patient, the estimation of dialysis interval duration relies on for a long time
The palpation of doctor and blood count lack real-time, quick, noninvasive detection methods.Develop the Gao Ling of a suitable practical clinical
Sensitivity, easy-operating oedema detection device seem pole it is necessary to.
Optical coherence technology has the sensitivity and resolution ratio of superelevation, and fast imaging ability makes it be widely used in recent years
In underlying biological and biomedical research.Traditional optical coherence technology using 1310 nano wavebands to the low absorption of tissue and
Reflective tomographic imaging ability is obtained compared with strong scattering；High-resolution is obtained using the high scattering low absorption of 800 nano wavebands
The tomograph of high contrast, but the penetration capacity of imaging beam is hence limited, reduce its intrinsic chromatography advantage.It is close red
Outer light enhances the penetration capacity of biological tissue with the increase of wavelength.1470 nano wave lengths are a water of near infrared band
Peak is absorbed, the wave band is commonly used clinically to carry out some heat and melts treatment.According to LambertBeer law, contain light absorption object
Uptake and substance content exponent function relation in the solution of the solution of matter to light.Therefore when 1470 nm near-infrared illumination
When penetrating in water content tissue abundant, light is largely absorbed by water, and compared with water content is normally organized, either transmitted light is also
It is that reflected light is exponentially reduced.
Due to safety concerns, clinically there is stringent limitation to the light intensity of optical means and irradiation time.In conjunction with water pair
The high-absorbable of 1470 nano wave lengths and the high sensitivity of optical coherence technology irradiate edematous site with lesser light intensity, utilize
The back-scattering light detected estimates that ponding relative amount is a kind of method for being worth probing into.
Utility model content
The utility model aim is: a kind of hand-held compact oedema detection device based on near-infrared absorption is provided,
Using the back-scattering light detected, the purpose of estimation ponding relative amount is realized.
The technical solution of the utility model is: a kind of hand-held compact oedema detection dress based on near-infrared absorption
It sets, comprising:
The near-infrared light source of ultra-wide spectrum, for generating specific band infrared light；
Beam splitter receives the emergent light of the near-infrared light source, the infrared light is divided into two bundles output, and receive return
Two-way infrared light, after merging generate interference light be output to spectrometer；
Reference arm is connected with the optical path all the way of the beam splitter, and the reference arm includes plano-convex cylindrical lens, dispersion compensating
Block and high reflectance plane mirror, the infrared light all the way focus on the plane mirror through plano-convex cylindrical lens, then anti-through plane mirror
It penetrates and returns to the beam splitter, the dispersion compensation module is used to match the dispersion differences of reference arm and sample arm；
Sample arm is connected with the another way optical path of the beam splitter, and the sample arm includes antireflective optical probe, described
Optic probe focuses on infrared light in tested tissue, and receives from the reflected infrared light of tested tissue, is transmitted back to beam splitting
Device；
Near infrared spectrum survey meter is connect with the merging optical output mouth of the beam splitter, and the spectrum detection instrument includes
Grating, scanning lens and CCD camera, the infrared light that the reference arm returns are dividing with from the reflected infrared light of tested tissue
Beam device forms interference signal, is detected by the near infrared spectrum survey meter, and specifically light beam is by transmission grating by wavelength point
It is irradiated in CCD camera after dissipating, generates image；
Driver, for controlling, the acquisition of synchronized signal, data, digitalized data, processing and store and display number
According to.
In one embodiment, the near-infrared light source includes the wide range near infrared laser being sequentially arranged, high-pass filtering
Device and free optical path fiber coupler, the wide range near infrared laser carry out light source as light source, the high-pass filter
After high-pass filtering processing, retain the infrared light of specific band, delivery outlet of the coupler as the infrared light generated.
In one embodiment, the near-infrared light source further includes Polarization Controller, and the Polarization Controller is set to height
Between bandpass filter and coupler, for controlling the polarization state of infrared light, guarantee that the light source power of output is maximum.
In one embodiment, the dispersion compensation module be prism to a, optical fiber, one with pop one's head in model
Any one of identical plano-convex cylindrical lens or achromatic lens.
In one embodiment, the probe of the sample arm is preceding to optical mode out using the two dimension of no built-in scan function,
The optic probe uses object lens of the plano-convex cylindrical lens as focal imaging light beam.
In one embodiment, the probe of the sample arm is lateral using the two dimension or three-dimensional for being built-in with MEMS scanning galvanometer
Optical mode out.
In one embodiment, the optic probe is using plano-convex cylindrical lens or achromatism condenser lens as focal imaging
The object lens of light beam, the plano-convex cylindrical lens or achromatism condenser lens have both outgoing detection light beam and collecting signal light beam.
In one embodiment, the specific band infrared light that the near-infrared light source generates be 1475 nanometers of center wavelength and
The continuous near infrared light of wide range that bandwidth halfwidth is 400 nanometers.
In one embodiment, the near infrared spectrum survey meter further includes one and is set between grating and scanning lens
Prism, the prism matches in pairs with grating, will receive wavelength linear detection light and is converted into wave number linear probing light, described
CCD camera is area array CCD camera.
The utility model has the advantages that: oedema content detection device high sensitivity, miniaturization, the operability of offer are good.
The introducing of dispersion compensation module matches the dispersion differences of reference arm and sample arm in interferometer, to improve longitudinal resolution.Polarization
The introducing of controller maximises output power, improves signal-to-noise ratio.Grating-prism pair is closed by match group, wavelength will be received
Linear probing light is converted into wave number linear probing light, to reduce consumption of the software post-processing to computer system, to be promoted whole
The speed of a detection process.Relative to the high radiation of X-ray or CT, the high cost of MRI technique, utility model device benefit
It is safe and harmless and economical and practical, it is easier to benefit patient with optical means.
Detailed description of the invention
The utility model is further described with reference to the accompanying drawings and embodiments:
Fig. 1 is that the two dimension in the utility model embodiment sample arm probe using no built-in scan function is preceding to optical mode out
Formula, optic probe use structural schematic diagram of the plano-convex cylindrical lens as object lens；
Fig. 2 is laterally to go out light using the three-dimensional for being built-in with MEMS scanning galvanometer in the utility model embodiment sample arm probe
Mode, optic probe use structural schematic diagram of the achromatism condenser lens as object lens；
Fig. 3 is the principle of hand-held compact oedema detection device of the utility model embodiment based on near-infrared absorption
Figure；
Fig. 4 is the utility model embodiment under different water contents, detects backscattering luminous intensity and tissue depth
Logarithmic relationship figure；
Fig. 5 is the utility model embodiment using the backscattering luminous intensity detected, the water content contained by different depth
The water content figure estimated when phase, wherein the C value in legend is theoretical water content, and the value by arrow mark is that algorithm is estimated
The water content of calculating；
Fig. 6 is the utility model embodiment using the backscattering luminous intensity detected, the water content contained by different depth
The depth estimated in the case where not equal, the relational graph of water content and backscattering light intensity.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
The utility model is imaged using near infrared light and the relevant principle of spectral domain optical.It is briefly exactly to send out light source
Light out is divided into two beams, a branch of to be emitted to testee, this optical path is referred to as sample arm, and another beam forms through reflecting mirror and joins
Signal is examined, which is known as reference arm.When sample arm and the optical path difference of reference arm are located in the interference length of light source, from tissue
It (sample arm) and can be superimposed to form interference signal from the two-beam that reflecting mirror (reference arm) returns.It is reflected from tissue
Optical signal is different and strong and weak different with the property (scattering and absorption etc.) of tissue.These optical signals pass through computer Fourier transformation
Processing can obtain tissue faultage image.A kind of hand-held compact water based on near-infrared absorption provided by the utility model
Swollen detection device, comprising: the near-infrared light source of ultra-wide spectrum, for generating specific band infrared light, it is preferred that the near infrared light
Source includes the wide range near infrared laser 01 being sequentially arranged, high-pass filter 02 and free optical path fiber coupler 03, the width
Composing near infrared laser 01 is used as light source to retain specific band after the high-pass filter is to light source progress high-pass filtering processing
Infrared light, the coupler 03 as generate infrared light exit portal.Preferably, what the near-infrared light source generated is specific
The super continuous near infrared light of wide range that waveband infrared is 1475 nanometers of center wavelength and bandwidth halfwidth is 400 nanometers；Beam splitter
04, the emergent light of the near-infrared light source is received, the infrared light is divided into two bundles output, and the two-way for receiving return is infrared
Light is output to spectrometer after merging；Reference arm is connected with the optical path all the way of the beam splitter, and the reference arm includes plano-convex column
Face mirror 14, dispersion compensation module 06 and high reflectance plane mirror 07, the infrared light all the way focus on described through plano-convex cylindrical lens
On plane mirror 07, then through the reflection return of plane mirror 07 beam splitter；Sample arm, the another way optical path phase with the beam splitter
Even, the sample arm includes antireflective optical probe 12, and the optic probe focuses on infrared light in tested tissue, and receives
From the reflected infrared light of tested tissue, it is transmitted back to beam splitter；Near infrared spectrum survey meter, what detection was formed at beam splitter
Interference signal, and tomograph is generated after being transmitted to Computer reprocessing, the spectrum detection instrument includes grating, scanning lens
And CCD camera, the infrared light that the reference arm returns form interference with from the reflected infrared light of tested tissue in beam splitter
Signal is detected by the near infrared spectrum survey meter, and specifically light beam is irradiated to CCD after transmission grating is by wavelength dispersion
On camera, image is generated.The device further includes driver, for controlling and synchronized signal and data acquisition, digitlization number
According to, processing and storing data data acquisition, display and memory module.It further include driving if built-in MEMS scanning galvanometer
MEMS scanning galvanometer.Utility model device is as shown in figure 3, the small-signal from sample arm is amplified by reference arm signal
Afterwards, it can be arrived by spectrometer detection.Wherein, ultra-continuous wideband light source 01 by high-pass filtering piece 02 (Thorlabs,
FEL1200 after) carrying out high-pass filtering processing to the light source, retain the light of 1200 nanometers of above wavelength, as the defeated of beam splitter 04
Enter, light beam passes through after beam splitter 04, and with the light splitting rate of 50:50 by central wavelength for 1475 nanometers, bandwidth halfwidth is received for 400
The near infrared light of rice is conveyed to the reference arm and sample arm of interferometer.400 nanometers of bandwidth makes the vertical of utility model device
Reach 2.4 microns to resolution ratio.In conjunction with the lateral resolution of above-mentioned 2-12 micron, the utility model is having outside high sensitivity
It is also equipped with the portraitlandscape resolution ratio of superelevation simultaneously, using the above method, the present apparatus has up to -100dB sensitivity.
Preferred in the utility model embodiment, the near-infrared light source further includes Polarization Controller 05, the polarization control
Device processed is set between high-pass filter and coupler, and for controlling the polarization state of infrared light, light source output power is maximum, thus
Guarantee high s/n ratio.
The utility model embodiment is preferred, and the reference arm further includes dispersion compensation module 06, for matching reference arm
With the dispersion differences of sample arm, the dispersion compensation module be prism to a, optical fiber, one it is identical with the interior model of probe
Any one of plano-convex cylindrical lens or achromatic lens, dispersion compensation can make the actual longitudinal resolution of system level off to theory
Value.
Preferred in the utility model one embodiment, the sample arm is preceding to out using the two dimension of no built-in scan function
Optical mode, object lens of the optic probe 12 using plano-convex cylindrical lens as focal imaging light beam.As shown in Figure 1.From optical fiber standard
The beam diameter of straight mirror outgoing is 3.6 millimeters, is focused at 1.4 millimeters of cylindrical mirror by a plano-convex cylindrical lens 14, institute
The lateral resolution for obtaining focal beam spot is 2 microns.The windowpane 15 that one 11 mm of thickness of diameter is 1 millimeter protects piano convex cylindrical
Mirror is not polluted by sample.All above-mentioned components are all integrated in the stainless steel tube 13 of one section of thin-walled thickness.The probe is using flat
Object lens of the convex cylindrical mirror as focal imaging light beam, the collimated light beam with circular light spot is on the direction that cylindrical mirror has curvature
It focuses, and still keeps 3.6 millimeters of width on direction normal thereto, therefore, beating on sample is one 2 microns wide, long
3.6 millimeters of long and narrow light belt must be by sweeping without such as common Mapping so that the probe naturally has two-dimensional detection ability
It retouches galvanometer and is just able to achieve two-dimensional imaging.
It is preferred in the utility model one embodiment, the sample arm using the two dimension for being built-in with MEMS scanning galvanometer or
It is three-dimensional laterally to go out optical mode.The galvanometer can freely realize one-dimensional or two-dimentional arbitrary patterns scanning, inherently in conjunction with the device
Chromatography ability provides two dimension or three-dimensional tissue's faultage image and two dimension or three-dimensional water content distribution map.Wherein, the optics is visited
First 12 can use the object lens of plano-convex cylindrical lens or achromatism condenser lens as focal imaging light beam, the plano-convex cylindrical lens or
Achromatism condenser lens has both outgoing detection light beam and collecting signal light beam.As shown in Fig. 2, from 17 outgoing beam of achromatic lens
It is reflected by MEMS galvanometer 18, focuses on the outer 0.5 millimeter of distant place of glass protection window 16, gained focuses the lateral of circular light spot and differentiates
Rate is 12 millimeters, and all above-mentioned components are all integrated in the stainless steel tube 13 of one section of thin-walled thickness.Two-dimentional organization chart and two
Dimension water content distribution map can scan to obtain by MEMS galvanometer single shaft；Engineering three-dimensional tissue structures figure and three-dimensional water content distribution map can lead to
MEMS galvanometer twin shaft is crossed to scan to obtain；Scanning range is controlled by the driving voltage for supplying MEMS galvanometer.
The utility model embodiment is preferred, and the near infrared spectrum survey meter further includes one and is set to grating and scanning
Prism between lens, the prism match in pairs with grating, will receive wavelength linear detection light and are converted into wave number and linearly visit
Light is surveyed, to save the numerical value resampling time, reaches raising detection rates, the CCD camera is area array CCD camera.Common light
Spectrometer is generally made of grating 08, scanning lens 10 and CCD camera 11.Light beam shines after transmission grating 08 is by wavelength dispersion
Be mapped on CCD is along pixel orientation wavelength linear.And utility model device utilizes Fourier transformation by spectrometer detection
The signal reconstruction arrived is at the image with organizational information.Due to the ultrahigh resolution of the present apparatus, when visual field is 5 millimeters × 5
When millimeter, according to nyquist sampling law, minimum shared 2222x4000 pixel ability complete characterization, it is meant that 4000 times
The Fourier transformation of 4096 (must be to 2222 zero paddings to 4096) a points will be called in the reconstruction of an image.And it will be to original
Interference signal carries out Fourier's reconstruction and necessarily requires original signal to be linear about wave number (frequency domain).Therefore become in Fourier
Before changing, each image must carry out 4000 difference operations in advance, and it is linear that signal from wavelength linear is switched to wave number.This process accounts for
With more computer resource to tie down real-time display.Spectrometer in utility model device introduces a prism 09,
The light beam for having wave number linear is obtained using the negative dispersion of grating and the positive dispersion of prism, to eliminate much time resource
Numerical interpolation.Simultaneously as parallel detection is utilized in the present apparatus, reduce the scanning of a dimension, therefore use area array CCD
Camera.
Captured image can be handled as follows in the embodiments of the present invention, to obtain the phase of tested tissue
To water content:
The signal of multiple continuous scanning points in image or a sub-picture to several same positions is averaged to subtract
Noise jamming；
Different location and the corresponding backscattering light intensity signal value of depth i are obtained using the image detected；
Local Phase is calculated according to the following formula to water content:
Wherein, CiIt is the Local Phase at tissue depth i to water content, IiIt is the signal value at depth i, Δ d is different
The distance between depth, InIt is the following different location signal value of depth i.
Specifically, according to the utility model proposes the water content measurement method with chromatography ability, it is same to several first
The signal of multiple continuous scanning points in the image of one position or a sub-picture is averaged to remove noise jamming.We according to
The formula that LambertBeer law is derived:
Wherein, I0It is original incident light intensity, μsFor scattering coefficient, μaFor absorption coefficient, C is water content.Due in specific group
In knitting, such as skin, muscle, fat, the μ of connective tissue etc.sAnd μaIt is all more constant, therefore when measuring privileged site oedema, it can
By sum of the two, it is referred to as attenuation coefficient and is considered as constant value.Again due to the judgement of oedema degree be compared to for normal tissue, we
The c of normal tissue is set as 1, while by (μs+μa) C is defined as opposite water content, value can be quasi- by nonlinear least square
The interference signal after Fourier transformation is closed to obtain.
Investigate different water contents, i.e., different oedema degree and the signal strength relationship detected.As shown in figure 4, water content
Difference causes signal strength to be very different, and with the increase of depth, and thus caused signal intensity difference becomes more
Obviously.It is 5 for water content, signal is the 40dB that decayed at 1 millimeter in depth, just because of the utility model device is high
Up to the sensitivity of -100dB, signal decaying so but can be still detected.
Fig. 5 illustrates the water content value by detectable signal, obtained according to formula (1) by nonlinear least square fitting.It is right
What is provided in upper angle marginal data is desired value, and corresponding 5 curves are the signals detected under different desired values.Left arrow refers to
What is shown is the water content value estimated by coherent signal.By comparing desired value and practical estimated value, it has been found that the two it
Between it is very close, error is only 5/1000ths.
The above analysis and calculating are all suitable only for the case where water content is evenly distributed within imaging depth, next divide
The case where analysis different depth water content is unevenly distributed.It is further deduced according to formula (2), available following relationship:
Wherein, CiIt is the Local Phase at tissue depth i to water content, IiIt is the signal value at depth i, Δ d is different
The distance between depth, InIt is the following different location signal value of depth i.According to this formula, different depth is obtained with can be convenient
The value of independent opposite water content.As shown in Fig. 6, the opposite water content at 0-0.2 millimeters is at 0.5,0.2-0.4 millimeters
Opposite water content is that the opposite water content at 1,0.4-0.6 millimeters is 0.3 etc..It can be found that the water content in the section 0.2-0.4
Highest, it is meant that water is most strong to the absorption of light, therefore signal strength decline is most fast within the scope of this.Opposite, in the section 0.4-0.6
Water content is minimum, it is meant that water is most weak to the absorbability of light, therefore signal strength decline is the slowest within the scope of this.
Hand-held compact oedema detection device disclosed by the utility model based on near-infrared absorption takes full advantage of
For 1470 nano wavebands to the high-selenium corn of water and the high sensitivity of optical coherence technology, it is a kind of convenient to provide for clinical edema detection
And reliable method.It, should by detecting tissue backscatter signals according to water to the high-absorbable of 1470 nm near-infrared light
Detection method can calculate edematous site automatically and be distributed in the water content of different tissues depth (compared to the non-oedema of homologue
Position water content).In addition, the device also serves as conventional near-infrared optical Laminographic device, for observing skin, eye
Eyeball, the Histological Studies such as oral cavity provide important reference for the early diagnosis of related disease.And relative to X-ray or
The high radiation of CT, the high cost of MRI technique, utility model device utilizes optical means, safe and harmless and economical and practical, more
It is easy to benefit patient.The utility model, which can be also used for heart failure, renal failure etc., needs the patient of chronic hemodialysis or the height of such illness
Real-time, the noninvasive monitoring of danger crowd, instructs patient and doctor to make Corresponding Countermeasures in due course.
The utility model relates to a kind of with highly sensitive organism oedema content detection device.Except high sensitivity
Outside, the miniaturization of equipment and good operability are also the requirement of clinical application.The hand-held light that utility model device includes
Learn probe shape it is extremely compact (12 millimeters of diameter × 22 millimeters of length), in containing scanning and focus and collect tissue carry on the back
To each optical element of scattering light.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
People can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.It is all
According to the modification that the Spirit Essence of the utility model main technical schemes is done, should all cover in the protection scope of the utility model
Within.
Claims (8)
1. a kind of hand-held compact oedema detection device based on near-infrared absorption characterized by comprising
The near-infrared light source of ultra-wide spectrum, the wide range for generating 1475 nanometers of central wavelength and bandwidth halfwidth is 400 nanometers connect
Continuous near infrared light；Beam splitter receives the emergent light of the near-infrared light source, the infrared light is divided into two bundles output, and receive
The two-way infrared light of return generates interference light and is output to spectrometer after merging；
Reference arm is connected with the optical path all the way of the beam splitter, the reference arm include plano-convex cylindrical lens, dispersion compensation module and
High reflectance plane mirror, the infrared light all the way in the two-way infrared light focus on the plane mirror through plano-convex cylindrical lens, then
The beam splitter is returned to through plane mirror reflection, the dispersion compensation module is used to match the dispersion differences of reference arm and sample arm；
Sample arm is connected with the another way optical path of the beam splitter, and the sample arm includes antireflective optical probe, the optics
Probe focuses on infrared light in tested tissue, and receives from the reflected infrared light of tested tissue, is transmitted back to beam splitter；
Near infrared spectrum survey meter is connect with the merging optical output mouth of the beam splitter, the spectrum detection instrument include grating,
Scanning lens and CCD camera, the infrared light that the reference arm returns with from the reflected infrared light of tested tissue in beam splitter
Interference signal is formed, is detected by the near infrared spectrum survey meter, specifically light beam is after transmission grating is by wavelength dispersion
It is irradiated in CCD camera, generates image；
Driver, for controlling, the acquisition of synchronized signal, data, digitalized data, processing and store and display data.
2. the hand-held compact oedema detection device based on near-infrared absorption as described in claim 1, which is characterized in that institute
Stating near-infrared light source includes the wide range near infrared laser being sequentially arranged, high-pass filter and free optical path fiber coupler, institute
Wide range near infrared laser is stated as light source, after the high-pass filter carries out high-pass filtering processing to light source, cardiac wave in reservation
The continuous near infrared light of wide range that 1475 nanometers of length and bandwidth halfwidth are 400 nanometers, the coupler is as the infrared light generated
Delivery outlet.
3. the hand-held compact oedema detection device based on near-infrared absorption as claimed in claim 2, which is characterized in that institute
Stating near-infrared light source further includes Polarization Controller, and the Polarization Controller is set between high-pass filter and coupler, is used for
The polarization state for controlling infrared light guarantees that the light source power of output is maximum.
4. the hand-held compact oedema detection device based on near-infrared absorption as described in claim 1, which is characterized in that institute
State dispersion compensation module be prism to, an optical fiber, a plano-convex cylindrical lens identical with the interior model of probe or achromatism
Any one of lens.
5. the hand-held compact oedema detection device based on near-infrared absorption as described in claim 1, which is characterized in that institute
The probe of sample arm is stated using, to optical mode out, the optic probe uses plano-convex cylindrical lens before the two dimension of no built-in scan function
Object lens as focal imaging light beam.
6. the hand-held compact oedema detection device based on near-infrared absorption as described in claim 1, which is characterized in that institute
The probe of sample arm is stated using the two dimension for being built-in with MEMS scanning galvanometer or three-dimensional lateral optical mode out.
7. the hand-held compact oedema detection device based on near-infrared absorption as claimed in claim 6, which is characterized in that institute
Optic probe is stated using the object lens of plano-convex cylindrical lens or achromatism condenser lens as focal imaging light beam, the plano-convex cylindrical lens
Or achromatism condenser lens has both outgoing detection light beam and collecting signal light beam.
8. the hand-held compact oedema detection device based on near-infrared absorption as described in claim 1, which is characterized in that institute
Stating near infrared spectrum survey meter further includes the prism being set between grating and scanning lens, and the prism is matched with grating
In pairs, wavelength linear detection light will be received and be converted into wave number linear probing light, the CCD camera is area array CCD camera.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108968922A (en) * | 2018-08-17 | 2018-12-11 | 苏州长脉科技有限责任公司 | A kind of hand-held compact oedema detection device and its data processing method based on near-infrared absorption |
| CN112326585A (en) * | 2020-10-28 | 2021-02-05 | 南京农业大学 | Infrared spectrum device and detection method for rapidly detecting powdery mildew of strawberries |
-
2018
- 2018-08-17 CN CN201821330681.8U patent/CN209474591U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108968922A (en) * | 2018-08-17 | 2018-12-11 | 苏州长脉科技有限责任公司 | A kind of hand-held compact oedema detection device and its data processing method based on near-infrared absorption |
| CN112326585A (en) * | 2020-10-28 | 2021-02-05 | 南京农业大学 | Infrared spectrum device and detection method for rapidly detecting powdery mildew of strawberries |
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