Ultraviolet and visible spectrophotometer

Abstract

The utility model relates to an ultraviolet and visible spectrophotometer which comprises a first light source, a calibration light source, a placement container, a light splitting structure and a spectrum detector, a light beam emitted by the first light source sequentially penetrates through the containing container, a detected object in the containing container and the light splitting structure to irradiate the spectrum detector, a light beam emitted by the calibration light source penetrates through the light splitting structure to irradiate the spectrum detector, the wavelength of the light beam emitted by the calibration light source is adjustable, and the light beam emitted by the calibration light source is adjustable. The wavelength of light beams emitted by the calibration light source is adjustable, multiple sets of light beams with specific wavelengths can be emitted, after the light beams emitted by the calibration light source irradiate the spectrum detector, a specific image can be generated in a spectrogram, and the specific image generated by the calibration light source can be compared with an image generated by the first light source. The demonstration of light source calibration in teaching is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical instrument technical field, concretely relates to a ultraviolet visible spectrophotometer. BACKGROUND

[0002] The ultraviolet visible spectrophotometer is the instrument that utilizes the selective absorption phenomenon of matter to light, carries out qualitative and quantitative analysis of matter, is the common analysis tool in modern analysis research field, is widely used in the detection of physics, chemistry, biology, medicine, food industry, pharmaceutical industry and environmental pollution. The working principle of ultraviolet visible spectrophotometer is that the composite light emitted by light source is decomposed into monochromatic light through monochromator, and the monochromatic light reaches the detector through the sample in sample chamber, and quantitative or qualitative results are obtained by measuring and analyzing the monochromatic light signal absorbed by the sample. The optical system of ultraviolet visible spectrophotometer is the important design of instrument, and is the basis design of instrument main structure design, device selection, overall layout, performance index and function application etc.

[0003] The existing ultraviolet visible spectrophotometer has completed the calibration of light source before leaving factory, so that the final spectrum diagram is directly generated by the spectrum detector in the experiment, and therefore, the calibration process of light source cannot be demonstrated in teaching.

[0004] Therefore, an ultraviolet visible spectrophotometer capable of demonstrating the calibration process in teaching is urgently needed. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the above problems, the utility model provides an ultraviolet visible spectrophotometer, which can emit light of fixed frequency to the spectrum detector through the calibration light source, and is used for comparison with the decomposed monochromatic light, so as to demonstrate the calibration process of light source in teaching.

[0006] To achieve the above purpose, the utility model provides the following scheme:

[0007] An ultraviolet visible spectrophotometer, comprising: a first light source, a calibration light source, a placing container, a light splitting structure and a spectrum detector, the placing container is detachably arranged, the light beam emitted by the first light source passes through the placing container, the measured object in the placing container and the light splitting structure in turn and irradiates to the spectrum detector, the light beam emitted by the calibration light source passes through the light splitting structure and irradiates to the spectrum detector, and the wavelength of the light beam emitted by the calibration light source is adjustable.

[0008] Preferably, it further comprises a box body, one side of the inside of the box body is a mounting table, the first light source, the calibration light source, the placing container, the light splitting structure and the spectrum detector are detachably mounted on the mounting table, and the side away from the mounting table of the box body is a movable door.

[0009] Preferably, the adjustable base is further included, and the first light source, the calibration light source, the placing container, the light splitting structure and the spectrum detector are all connected with the mounting table through the adjustable base.

[0010] Preferably, the first light source is a combination light source of a deuterium lamp and a tungsten lamp or a xenon lamp.

[0011] Preferably, a switching device is further included, and the switching device is arranged between the first light source and the placing container, and a plane mirror is arranged on a movable arm of the switching device, and the light emitted by the tungsten lamp is reflected by the plane mirror and irradiated to the placing container.

[0012] Preferably, a spherical mirror is further included, and the light emitted by the first light source can be collected into a point light source by the spherical mirror and irradiated to the placing container.

[0013] Preferably, a light flux limiting device is arranged between the first light source and the placing container to limit the amount of light beam irradiated to the placing container.

[0014] Preferably, a first plano-convex lens is arranged between the first light source and the placing container to convert the light beam irradiated to the placing container into parallel light.

[0015] Preferably, a second plano-convex lens for converging light source, a slit and a first plano-concave mirror are arranged between the placing container and the light splitting structure, and the light beam emitted by the first light source and the light beam emitted by the calibration light source are sequentially irradiated to the light splitting structure after being emitted by the placing container and passing through the second plano-convex lens, the slit and the first plano-concave mirror.

[0016] Preferably, a second plano-concave mirror is arranged between the light splitting structure and the spectrum detector to irradiate the light selected by the light splitting structure to the spectrum detector.

[0017] The utility model discloses relative to prior art has obtained following technical effect:

[0018] In the ultraviolet visible spectrophotometer disclosed by the application, the light beam emitted by the first light source irradiates the measured object in the placing container, the light beam passing through the measured object is decomposed into monochromatic light by the light splitting structure and irradiated to the spectrum detector to generate a spectrum graph, the wavelength of the light beam emitted by the calibration light source is adjustable, the calibration light source can emit multiple groups of light beams with specific wavelengths, and after the light beam emitted by the calibration light source is irradiated to the spectrum detector, a specific image can be generated in the spectrum graph, the specific image generated by the calibration light source can be compared with the image generated by the first light source, and the demonstration of light source calibration in teaching is realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 is a schematic diagram of the present application; Fig. 1 Figure 1 is a schematic diagram of the present application;

[0021] Figure 1 is a schematic diagram of the present application; Fig. 2 Figure 1 is a schematic diagram of the present application;

[0022] 1, calibration light source; 2, container; 3, light splitting structure; 4, spectral detector; 5, box; 6, movable door; 7, deuterium lamp; 8, tungsten lamp; 9, switching device; 10, spherical mirror; 11, beam flux limiting device; 12, first plano-convex lens; 13, second plano-convex lens; 14, slit; 15, first plano-concave mirror; 16, second plano-concave mirror; 17, signal processing system; 18, power supply. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] The purpose of the present application is to provide a kind of ultraviolet visible spectrophotometer, the spectrum generated by calibrating light beam is compared with the spectrum generated by first light source, can be carried out in teaching light source calibration demonstration.

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0026] Please refer to Figs. 1-2The utility model discloses a ultraviolet visible spectrophotometer, including: first light source, calibration light source 1, place container 2, split light structure 3 and spectrum detector 4, the light beam that first light source sent can pass through place container 2, the measured object in place container 2 and split light structure 3 in proper order and irradiate to spectrum detector 4, and the light that passes through measured object is decomposed into monochromatic light by split light structure 3 and is transferred to spectrum detector 4, and can generate corresponding spectrogram, wherein place container 2 is detachably arranged, when calibrating, remove place container 2, calibration light source 1 works, the light beam that calibration light source 1 sent finally also irradiate to spectrum detector 4, the wavelength of the light beam that calibration light source 1 sent can be adjusted, it can emit multiple groups of specific wavelength light beam, and generate specific image on spectrogram, that is, can compare the image generated by the light ray that first light source sent with the image generated by the light ray that calibration light source 1 sent, realize the demonstration of light source calibration in teaching.

[0027] As a preferred embodiment, further comprising box 5, the side wall of the inside one side of box 5 is installation platform, further, first light source, calibration light source 1, place container 2, split light structure 3 and spectrum detector 4 can be detachably installed on installation platform, the side of box 5 away from installation platform is movable door 6, and box 5 can be opened or closed through movable door 6;Movable door 6 and installation platform are arranged on the opposite two faces of box 5, therefore, after opening movable door 6, first light source, calibration light source 1, place container 2, split light structure 3 and spectrum detector 4 can be all exposed, to facilitate students to directly observe the internal structure of spectrometer.

[0028] Further, further comprising adjustable base, first light source, calibration light source 1, place container 2, split light structure 3 and spectrum detector 4 are connected with installation platform through adjustable base;Further, adjustable base and installation platform are detachably connected;Through adjustable base, first light source, calibration light source 1, place container 2, split light structure 3 and spectrum detector 4 can be freely adjusted in up and down, left and right and pitch angle, bring more flexible light path control effect, at the same time, overcome the defects that existing closed instrument cannot be disassembled and visual observation, effectively improve the practical operation experience of students.

[0029] It can be understood that: adjustable base is the optical device base with multidimensional adjustable function, hereinafter not too much elaboration.

[0030] As a preferred embodiment, first light source is the combined light source of deuterium lamp 7 and tungsten lamp 8 or xenon lamp.

[0031] Further, the switching device 9 is arranged between the first light source and the placing container 2, and a plane mirror is arranged on the movable arm of the switching device 9, the light emitted by the tungsten lamp 8 is reflected by the plane mirror and irradiates the placing container 2; in actual use, for example, the tungsten lamp 8 is turned on first and then the deuterium lamp 7 is turned on, the tungsten lamp 8 is turned on, at this time, the movable arm is in the extended state, the plane mirror on the movable arm is opposite to the tungsten lamp 8, the light emitted by the tungsten lamp 8 is reflected by the plane mirror and irradiates the placing container 2, and finally the corresponding spectrum is generated on the spectrum detector 4, then the tungsten lamp 8 is turned off and the deuterium lamp 7 is turned on, at this time, the movable arm is retracted, the light emitted by the deuterium lamp 7 can irradiate the liquid to be measured in the placing container 2 without the reflection of the plane mirror, and thus the free switching of the light path is realized.

[0032] Preferably, the switching device 9 further comprises a stepping motor, one end of the movable arm is connected to the output end of the stepping motor, and the stepping motor can make the movable arm extend or retract.

[0033] As a preferred embodiment, the spherical mirror 10 is further arranged, and the spherical mirror 10 can converge the light emitted by the first light source into a point light source, so that the light emitted by the first light source can irradiate the placing container 2 in the form of a point light source.

[0034] More preferably, the light beam flux limiting device 11 is arranged between the first light source and the placing container 2, so as to limit the amount of light beam irradiating the placing container 2; further, the light beam flux limiting device 11 can be a diaphragm, a light limiter, a light beam shaper, a light beam limiter, etc.

[0035] As a preferred embodiment, the first plano-convex lens 12 is arranged between the first light source and the placing container 2, and the first plano-convex lens 12 can convert the light beam into parallel light, so that the light can be parallel to the placing container 2.

[0036] As a preferred embodiment, the second plano-convex lens 13, the slit 14 and the first plano-concave mirror 15 for converging the light source are arranged between the placing container 2 and the light splitting structure 3; the second plano-convex lens 13 can converge the light passing through the liquid to be measured to the slit 14, the light passing through the slit 14 reaches the first plano-concave mirror 15, and the first plano-concave mirror 15 can converge the light to irradiate the light splitting structure 3.

[0037] As a preferred embodiment, the second plano-concave mirror 16 is arranged between the light splitting structure 3 and the spectrum detector 4, and the second plano-concave mirror 16 can converge the light selected by the light splitting structure 3 to the spectrum detector 4.

[0038] Preferably, the light splitting structure 3 can be a grating, a prism, an interferometer, etc.

[0039] As a preferred embodiment, the signal processing system 17 is further included, which is in signal connection with the spectral detector 4, and the signal processing system 17 can identify the light signal of the spectral detector 4 to form a spectrum diagram of 200-800nm, and according to the spectrum diagram information, the measured substance can be quantitatively and qualitatively analyzed.

[0040] Preferably, the placing container 2 is a cuvette.

[0041] Further, the calibration light source 1 is a mercury lamp or mercury argon or at least three laser light sources with different wavelengths.

[0042] More preferably, the spectral detector 4 is a CCD spectral detector 4.

[0043] As a preferred embodiment, the step motor, the spherical mirror 10, the light beam flux limiting device 11, the first plano-convex lens 12, the second plano-convex lens 13, the slit 14, the first plano-concave mirror 15 and the second plano-concave mirror 16 are all connected with the mounting table through the adjustable base.

[0044] Further, the ultraviolet-visible spectrophotometer further includes a power supply 18 for providing energy for the device.

[0045] The adaptive changes according to actual needs are all within the protection scope of the utility model.

[0046] It should be noted that, for those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An ultraviolet-visible spectrophotometer characterized by comprising: It comprises: a first light source, a calibration light source (1), a placement container (2), a light splitting structure (3) and a spectrum detector (4), the placement container (2) is detachably arranged, the light beam emitted by the first light source passes through the placement container (2), the measured object in the placement container (2) and the light splitting structure (3) in turn and irradiates to the spectrum detector (4), the light beam emitted by the calibration light source (1) passes through the light splitting structure (3) and irradiates to the spectrum detector (4), and the wavelength of the light beam emitted by the calibration light source (1) is adjustable.

2. The UV-Visible spectrophotometer according to claim 1, characterized in that, It also comprises a box (5), one side of the inside of the box (5) is a mounting table, the first light source, the calibration light source (1), the placement container (2), the light splitting structure (3) and the spectrum detector (4) are all detachably mounted on the mounting table, and the side away from the mounting table of the box (5) is a movable door (6).

3. The UV-Visible spectrophotometer according to claim 2, wherein, It also comprises an adjustable base, and the first light source, the calibration light source (1), the placement container (2), the light splitting structure (3) and the spectrum detector (4) are all connected with the mounting table through the adjustable base.

4. The UV-Visible spectrophotometer according to claim 1, wherein, The first light source is a combined light source of deuterium lamp (7) and tungsten lamp (8) or xenon lamp.

5. The UV-Visible spectrophotometer according to claim 4, characterized in that, It also comprises a switching device (9), which is arranged between the first light source and the placement container (2), a plane mirror is arranged on the movable arm of the switching device (9), and the light emitted by the tungsten lamp (8) is reflected by the plane mirror and irradiated to the placement container (2).

6. The UV-Visible spectrophotometer according to claim 1, wherein, It also comprises a spherical mirror (10), and the light emitted by the first light source can be collected into a point light source by the spherical mirror (10) and irradiated to the placement container (2).

7. The UV-Visible spectrophotometer according to claim 1, wherein, A light beam flux limiting device (11) is arranged between the first light source and the placement container (2) to limit the amount of light beam irradiated to the placement container (2).

8. The UV-Visible spectrophotometer according to claim 1, wherein, A first plano-convex lens (12) is arranged between the first light source and the placement container (2) to convert the light beam irradiated to the placement container (2) into parallel light.

9. The UV-Visible spectrophotometer according to claim 1, wherein, A second plano-convex lens (13) for converging light source, a slit (14) and a first plano-concave mirror (15) are arranged between the placement container (2) and the light splitting structure (3), and the light beam emitted by the first light source and the light beam emitted by the calibration light source (1) are irradiated to the light splitting structure (3) in turn after being emitted by the placement container (2) and passing through the second plano-convex lens (13), the slit (14) and the first plano-concave mirror (15).

10. The UV-Visible spectrophotometer according to claim 1, wherein, A second plano-concave mirror (16) is arranged between the light splitting structure (3) and the spectrum detector (4) to irradiate the light selected by the light splitting structure (3) to the spectrum detector (4).

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