CN104062007A - Mobile phone spectrograph module and mobile phone spectrograph with mobile phone spectrograph module - Google Patents
Mobile phone spectrograph module and mobile phone spectrograph with mobile phone spectrograph module Download PDFInfo
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- CN104062007A CN104062007A CN201410248090.6A CN201410248090A CN104062007A CN 104062007 A CN104062007 A CN 104062007A CN 201410248090 A CN201410248090 A CN 201410248090A CN 104062007 A CN104062007 A CN 104062007A
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Abstract
The invention is suitable for the technical field of spectrographs, and discloses a mobile phone spectrograph module and a mobile phone spectrograph with the mobile phone spectrograph module. The mobile phone spectrograph module comprises a shell with a slit. A plane-convex collimating lens used for collimating light rays entering the slit is arranged in the shell. A reflecting grating used for reflecting the light rays collimated by the plane-convex collimating lens and changing the incident polychromatic light into monochromatic light emitted in different directions is arranged on one side of the plane-convex collimating lens. A spherical reflecting mirror used for gathering the monochromatic light emitted by the reflecting grating is further arranged in the shell. A biconvex lens is arranged between the spherical reflecting mirror and the receiving face of a mobile phone camera. The mobile phone spectrograph comprises a mobile phone and the mobile phone spectrograph module. The mobile phone spectrograph module and the mobile phone spectrograph with the mobile phone spectrograph module are high in spectral resolution, compact in structure, easy to install and capable of being easily expanded and externally arranged.
Description
Technical field
The invention belongs to spectrometer technical field, relate in particular to a kind of mobile phone spectrometer module and there is the mobile phone spectrometer of this mobile phone spectrometer module.
Background technology
Spectrometer is the important tool in the fields such as food inspection, environmental monitoring, biochemical analysis, illumination detection.Along with demand daily, real-time detection is more and more, recent two decades carrys out spectrometer and walks out gradually laboratory, towards the trend development of microminaturization.At present the micro spectrometer of main flow is taking U.S.'s marine optics, Dutch Ai Wantisi, Japanese Bin Songdeng company product as representative, mostly based on Cheney-Tener light path or flat filed concave grating light path, adopt CCD/CMOS linear array detector receiving spectrum, spectroscopic data transfers to computer or built-in industrial control machine display analysis by interfaces such as USB/ bluetooths.Such micro spectrometer can be accomplished hand size, have compact portable, easy to use, measure the advantages such as quick, its spectral resolution is enough to meet the measurement requirement of general application, ten thousand yuan of price less thaies, therefore be particularly suitable for on-the-spot original position fast detecting, be widely applied.Along with the arrival in mobile Internet epoch, mobile device taking mobile phone as representative has developed into IDT, this impact for hardware development is far-reaching, and various equipment of being combined with mobile phone is constantly released, can complete various sensing datas collection, analyze, upload etc.As previously mentioned, current micro spectrometer remains the hardware system of an independent completion, comprises ray machine, circuit, demonstration peripheral hardware etc.For mobile phone, carry CMOS camera circuit, can take visible light, mobile phone screen is to show peripheral hardware, therefore only needs design bare engine module and mobile phone to be fitted to each other, then is aided with mobile phone terminal software, can realize mobile phone spectrometer.Compared with the micro spectrometer of existing main flow, mobile phone spectrometer has been realized the combination of spectrometer module and mobile phone, there is better portability, without special circuit and special demonstration peripheral hardware, cheaper cost (cost is more than 70%), data upload is shared more efficiently, directly pass through mobile Internet, and without uploading from computer or built-in industrial control machine as now, user only just can realize whole flow processs of spectral detection by mobile phone, thereby is more prone to popularization and application.
At present, some external researchists have started the research and development to mobile phone spectrometer, and that representative is the public lab of the U.S., and the light channel structure form of the mobile phone spectrometer of its design as shown in Figure 1.In this light channel structure, only have slit 1 ' and 2 ' two devices of grating, in Fig. 1,3 ' is mobile lens receiving plane, and grating is transmission-type grating film, simple in structure, and cost is low, but spectral resolution is undesirable.
For existing micro spectrometer, mobile phone spectrometer has very large advantage undoubtedly at aspects such as portability, cost and data transmission.But spectrometer is as detecting instrument, no matter how its version changes, and must possess certain spectral resolution and could obtain good accuracy of detection.The mobile phone spectrometer modular structure that Fig. 1 shows is simple, and cost is low, but mainly contains following deficiency:
The first, spectral resolution is undesirable.In light path, polychromatic light through slit, shines directly into grating, and these light are not directional lights, but diverging light is difficult in the imaging of short distance inner focusing after plane transmission grating diffraction, and spectral resolution is undesirable.Can find out from the ray tracing emulation of Fig. 1, on mobile lens receiving plane, the light position of each wavelength is at random, cannot focus on, and this means that the spectra overlapping that mobile phone cmos detector takes is serious, spectrally resolved rate variance.Prolongation image-forming range (grating is to the distance of mobile lens receiving plane) can improve the focusing situation of light slightly, but image-forming range elongation enlarges markedly bare engine module volume, and portable variation, loses more than gain.
The second, structure is optimized not.As shown in Figure 1, when light beam is after slit glancing incidence, through grating beam splitting, between emergent ray and incident ray, there is a larger angle.Thereby cause us in the time utilizing mobile phone spectrometer to test, must have the larger elevation angle can allow mobile phone spectrometer receive and treat photometry.If want, expanding peripherals absorbs, reflectance spectrum when test, and such irregular contour will be brought certain difficulty to design.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of mobile phone spectrometer module is provided and has had the mobile phone spectrometer of this mobile phone spectrometer module, its spectral resolution is good, compact conformation, is easy to install and expanding peripherals.
Technical scheme of the present invention is: a kind of mobile phone spectrometer module, comprise housing, one end of described housing offers for the slit as light entrance, in described housing, be provided with for collimating from the plano-convex collimation lens of the light of described slit incident, one side of described plano-convex collimation lens is provided with for reflecting the light after described plano-convex collimation lens collimation and the polychromatic light of incident being become to the monochromatic reflection grating along different directions outgoing, in described housing, be also provided with the spherical reflector for the monochromatic light of described reflection grating outgoing is assembled, the other end of described housing is mobile lens receiving plane, between described spherical reflector and described mobile lens receiving plane, be provided with biconvex lens, the focal plane of described spherical reflector is spectrum face, described spectrum face is in one times of focal length of described biconvex lens.
Alternatively, the width of described slit is 10 to 200 μ m.
Alternatively, the thickness of described slit is 0.05 to 0.3mm.
Alternatively, described slit is by etch process or laser cutting parameter moulding.
Alternatively, described reflection grating by copying, aluminizer technological forming.
Alternatively, the line density of described reflection grating is 150 to 1200 lines/mm.
Alternatively, described spherical reflector comprises concave glass substrate and is sputtered at the metal film of described concave glass substrate.
Alternatively, described spherical reflector and described biconvex lens are connected with the adjusting part for regulating distance between described spherical reflector and described biconvex lens.
The present invention also provides a kind of mobile phone spectrometer, comprises the mobile phone with camera, also comprises above-mentioned mobile phone spectrometer module, and described mobile phone spectrometer module is connected in the camera front of described mobile phone.
Alternatively, described mobile phone spectrometer also comprises web member, offer light path through hole by web member, one end of described web member is connected in the housing of described mobile phone by buckle structure, and the housing of described mobile phone spectrometer module is threadedly connected to the other end of described web member.
Mobile phone spectrometer module provided by the invention and there is the mobile phone spectrometer of this mobile phone spectrometer module, it focuses on by introducing plano-convex collimation lens and spherical reflector, makes mobile phone spectrometer module have good spectral resolution; Introduce biconvex lens imaging the distance of spectrum face and mobile phone camera is zoomed out, overcome the difficulty that mobile phone is clapped microspur object, do not increase again the size of system simultaneously, compact overall structure.In addition, light entrance face can be parallel with exit facet, and therefore the contour structures of spectrometer module is simply upright, is easy to install and expanding peripherals.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the index path of the mobile phone spectrometer module that provides in prior art;
Fig. 2 is the index path of the mobile phone spectrometer module that provides of the embodiment of the present invention;
Fig. 3 is the floor map of the mobile phone spectrometer module that provides of the embodiment of the present invention;
Fig. 4 is the perspective exploded view of the mobile phone spectrometer that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
It should be noted that, when element is called as " being fixed on " or " being arranged at " another element, it can be directly on another element or may have centering elements simultaneously.When an element " being connected in " another element of being known as, it can be directly connected to another element or may have centering elements simultaneously.
Also it should be noted that, the orientation term such as left and right, upper and lower in the present embodiment, is only relative concept or taking the normal operating condition of product as reference each other, and should not be regarded as have restrictive.
As shown in Figures 2 to 4, a kind of mobile phone spectrometer module 3 that the embodiment of the present invention provides, comprise housing 30, one end of described housing 30 offers for the slit 31 as light entrance, in described housing 30, be provided with for collimating from the plano-convex collimation lens 32 of the light of described slit 31 incidents, plano-convex collimation lens 32 is plane with described slit 31 side in opposite directions, the opposite side of plano-convex collimation lens 32 is protruding sphere, plano-convex collimation lens 32, for collimating from the light of slit 31 incidents, is become directional light.One side of described plano-convex collimation lens 32 is provided with for reflecting the light after described plano-convex collimation lens 32 collimations and the polychromatic light of incident being become to the monochromatic reflection grating 33 along different directions outgoing, the optical axis tiltable of the relative plano-convex collimation lens 32 of optical axis of reflection grating 33 arranges, the angle tilting can be between 5 to 85 degree, preferably can be 30 to 60 degree, for example 45 degree etc.In described housing 30, be also provided with the spherical reflector 34 for the monochromatic light of described reflection grating 33 outgoing is assembled, the optical axis of spherical reflector 34 can with the inclined light shaft setting of plano-convex collimation lens 32, the angle tilting can be between 5 to 85 degree, preferably can be 30 to 60 degree, for example 45 degree etc.Both can be divided into the both sides of plano-convex collimation lens 32, compact conformation reflection grating 33, spherical reflector 34.The other end of described housing 30 is mobile lens receiving plane 36, between described spherical reflector 34 and described mobile lens receiving plane 36, is provided with biconvex lens 35.The focal plane of described spherical reflector 34 is spectrum face, and described spectrum face is in one times of focal length of described biconvex lens 35.Through 35 one-tenth virtual images of biconvex lens, the virtual image is positioned at biconvex lens 35 lefts at a distance; This virtual image can be used as the thing of mobile phone camera, finally images on the cmos sensor of mobile phone, and picture that cmos sensor is taken the photograph is the spectral distribution of incident light.Focus on by introducing plano-convex collimation lens 32 and spherical reflector 34, make mobile phone spectrometer module 3 there is good spectral resolution; Introduce biconvex lens 35 imagings the distance of spectrum face and mobile phone camera is zoomed out, overcome the difficulty that mobile phone is clapped microspur object, do not increase again the size of system simultaneously, compact overall structure.In addition, light entrance face is parallel with exit facet, and therefore the contour structures of spectrometer module is simply upright, is easy to install and expanding peripherals.
Particularly, the width of described slit 31 can be 10 to 200 μ m or other suitable width.
Particularly, the thickness of described slit 31 is 0.05 to 0.3mm or other suitable thickness.
Particularly, described slit 31 can pass through etch process or laser cutting parameter moulding, and its moulding precision is high.In concrete application, slit 31 can be made by the technique such as cut, chemical etching on stainless steel disk.
Particularly, described plano-convex collimation lens 32 and described biconvex lens 35 can adopt optical glass or optical plastic to make.In concrete application, the material of plano-convex collimation lens 32 and biconvex lens 35 may but be not limited to the optical plastic such as the optical glass such as K9 and polymethylmethacrylate (PMMA).
Particularly, described reflection grating 33 can be by copying, aluminizer technological forming.
Particularly, the line density of described reflection grating 33 can be 150 to 1200 lines/mm etc.
Particularly, described spherical reflector 34 comprises concave glass substrate and is sputtered at the metal film of described concave glass substrate.Metal film can be aluminium film etc.
Particularly, described spherical reflector 34 and described biconvex lens 35 are connected with the adjusting part for regulating distance between described spherical reflector 34 and described biconvex lens 35.Adjusting part can regulate by screw rod etc. is set, and states spherical reflector 34 or described biconvex lens 35 carries out rectilinear motion to order about.The focal plane (being spectrum face) that ensures spherical reflector 34 is positioned in one times of focal length of biconvex lens 35.
The embodiment of the present invention also provides a kind of mobile phone spectrometer, comprises and has the mobile phone 1 of camera and above-mentioned mobile phone spectrometer module 3, and described mobile phone spectrometer module 3 is connected in the camera front of described mobile phone 1.
Particularly, as shown in Figures 2 to 4, described mobile phone spectrometer also comprises web member 2, offer light path through hole 21 by web member 2, one end of described web member 2 is connected in the housing 30 of described mobile phone by buckle structure, the housing 30 of described mobile phone spectrometer module 3 is threadedly connected to the other end of described web member 2.Incident light enters in mobile phone spectrometer module 3 by slit 31, after plano-convex collimation lens 32, becomes directional light.This secondary color parallel beam is through reflection grating 33 light splitting, and the light of different wave length is separated in exit direction, is irradiated on spherical reflector 34.Spherical reflector 34 focuses on light, the light focus point position difference of different wave length, and the focal plane of focusing is spectrum face.Light enters biconvex lens 35 after by focus point, within aforementioned spectral face is positioned at one times of focal length of biconvex lens 35, amplifies the virtual image through 35 one-tenth of biconvex lens.This amplification virtual image is taken through mobile phone CMOS camera, can obtain spectral distribution image.By adopting plano-convex collimation lens 32 to collimate to incident ray, adopt spherical reflector 34 to focus on the light of different wave length after light splitting, can greatly reduce the aberration that spectrum focuses on, thereby improve spectral resolution.By adding biconvex lens 35 to be optimized system.If mobile phone camera is directly taken spectral image that spherical reflector 34 becomes, due to the microspur focusing restriction of camera, must ensure that mobile phone camera and spectrum face are greater than certain distance (>6cm conventionally), thereby be unfavorable for the microminaturization of module.By the position of reasonable placement biconvex lens 35, make it become to amplify the virtual image to spectrum face, this virtual image is equivalent to " virtual object " of mobile phone camera, is positioned at biconvex lens 35 lefts at a distance, therefore can ensure mobile phone camera shape library shooting.The actual range of spectrum face and mobile phone camera can be very near like this, makes the volume of whole module more compact, and small product size is little, effective.And in the present embodiment, the light channel structure of employing can ensure that light entrance face is parallel with exit facet, therefore the contour structures of mobile phone spectrometer module 3 is simply upright, is easy to install and expanding peripherals.
The smart mobile phone of the systems such as mobile phone spectrometer module 3 compatible IOS provided by the invention, Android, WP, certainly, this mobile phone spectrometer module 3 also can be applicable to panel computer etc. to be had in the smart machine of camera, mobile phone spectrometer module 3 provided by the invention, its system spectrum resolution is higher, and accuracy of detection is more excellent, and structure is compacter, light channel structure design is more reasonable, and light entrance face is substantially parallel with imaging surface.Spectrometer module and mobile phone assembling are simple, are easy to increase install and measure annex.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace or improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a mobile phone spectrometer module, comprise housing, one end of described housing offers for the slit as light entrance, it is characterized in that, in described housing, be provided with for collimating from the plano-convex collimation lens of the light of described slit incident, one side of described plano-convex collimation lens is provided with for reflecting the light after described plano-convex collimation lens collimation and the polychromatic light of incident being become to the monochromatic reflection grating along different directions outgoing, in described housing, be also provided with the spherical reflector for the monochromatic light of described reflection grating outgoing is assembled, the other end of described housing is mobile lens receiving plane, between described spherical reflector and described mobile lens receiving plane, be provided with biconvex lens, the focal plane of described spherical reflector is spectrum face, described spectrum face is in one times of focal length of described biconvex lens.
2. mobile phone spectrometer module as claimed in claim 1, is characterized in that, the width of described slit is 10 to 200 μ m.
3. mobile phone spectrometer module as claimed in claim 1, is characterized in that, the thickness of described slit is 0.05 to 0.3mm.
4. mobile phone spectrometer module as claimed in claim 1, is characterized in that, described slit is by etch process or laser cutting parameter moulding.
5. mobile phone spectrometer module as claimed in claim 1, is characterized in that, described reflection grating by copying, aluminizer technological forming.
6. the mobile phone spectrometer module as described in any one in claim 1 to 5, is characterized in that, the line density of described reflection grating is 150 to 1200 lines/mm.
7. the mobile phone spectrometer module as described in any one in claim 1 to 5, is characterized in that, described spherical reflector comprises concave glass substrate and is sputtered at the metal film of described concave glass substrate.
8. the mobile phone spectrometer module as described in any one in claim 1 to 5, is characterized in that, described spherical reflector and described biconvex lens are connected with the adjusting part for regulating distance between described spherical reflector and described biconvex lens.
9. a mobile phone spectrometer, comprises the mobile phone with camera, it is characterized in that, also comprises the mobile phone spectrometer module as described in any one in claim 1 to 8, and described mobile phone spectrometer module is connected in the camera front of described mobile phone.
10. mobile phone spectrometer as claimed in claim 9, it is characterized in that, described mobile phone spectrometer also comprises web member, offer light path through hole by web member, one end of described web member is connected in the housing of described mobile phone by buckle structure, the housing of described mobile phone spectrometer module is threadedly connected to the other end of described web member.
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