CN201885799U - Monochromator optical path structure system of UV-2102PC type ultraviolet and visible spectrophotometer - Google Patents

Abstract

The utility model relates to a monochromator optical path structure system of a UV-2102PC type ultraviolet and visible spectrophotometer. The system comprises a plurality of optical elements, wherein the optical elements are all fixed on an optical platform of a spectrophotometer bottom plate. The monochromator optical path structure system has the following characteristics: (1) the optical elements are all fixed on the optical platform, so that the optical path center can absolutely stay on an optical axis plane; (2) the optical elements are all mounted in a forward direction, so that the installation and the modulation, as well as the light deflection are facilitated; (3) the space is so wide that the optical path direction is clear and the mistakes can be discovered easily; (4) the production efficiency is high; (5) the first-time qualification rate is high for light deflection; and (5) the after-sale service is simple and easy to operate.

Description

UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure system

Technical field:

The utility model relates to a kind of ultraviolet-visible pectrophotometer monochromator light channel structure system.

Background technology:

Spectrophotometric analysis principle is to utilize material to the selection absorption characteristic of different wavelengths of light and the analytical approach of setting up.Usually utilize prism or grating beam splitting to obtain monochromatic light, make monochromatic light pass through solution continuously successively, and record of the absorption of this solution to each wavelength, receive absorbed light signal with silicon photocell at last, and light signal is changed into the absorbance T% of quantification and the figure spectral curve is reflected on the liquid crystal display or on the PC with modern electronic technology and computer technology.By analysis to absorption spectrum, but the just structure of matter of discriminatory analysis object and chemical analysis.Can be widely used in industries such as chemical industry, medicine, biochemistry, metallurgy, light industry, weaving, material, environmental protection, medical science chemical examination, education, be one of important quality control instrument in the analytical test industry, is the indispensable instrument of Routine Test Lab.A ultraviolet-visible pectrophotometer structurally can be by light source, monochromator, and the sample chamber, detecting device amplifies six most of compositions such as control system and result display system.Its block diagram is as follows: wherein monochromator is spectrophotometric core component, and monochromator is that the complex light with light emitted is decomposed into monochromatic light and can therefrom tells the monochromatic optical devices of arbitrary wavelength.Monochromator is formed a complete dispersion system by five parts such as entrance slit, collimator apparatus (lens or catoptron), dispersion element (prism or grating), focalizer (lens or concave mirror) and exit slits.And be installed in the lighttight magazine.The monochromator structure of traditional ultraviolet-visible pectrophotometer as shown in Figure 1, its function provides ultraviolet or visible monochromatic light.As can be seen from Figure 1, the Lights section has been the part of monochromator.The Lights section switches mirror 3 by tungsten lamp 4, deuterium lamp 1, concave mirror 5 and lamp source to be formed; And these optical modules all are installed on the lamp house frame 6, and lamp house frame 6 is their datum clamp faces.Tungsten lamp 4 is the light sources in visible and near infrared spectrum district.The wavelength coverage that is suitable for is 250-2000nm.Deuterium lamp 1 is to be used for the optimal ultraviolet source of ultraviolet spectrophotometer at present, and suitable wavelength coverage is 185-400nm.During deuterium lamp 1 work, the maximal value of energy of light source and has 486.0nm and 656.1nm two Gents to levy spectral line in the visible range near 230nm, can be used as the instrument wavelength accuracy proofreaied and correct to use.As shown in Figure 1, the optical elements in the magazine 10 have: optical filter 13, collimating mirror 8, grating 11, plane mirror 12, and they all are the reversal of the natural order of things shape and are installed on the magazine 10, and its reference for installation is magazine 10 end faces.

The light channel structure of the monochromator of traditional UV2102 series ultraviolet visible spectrophotometer as shown in Figure 2.Its light path trend is: the white light that tungsten lamp 24 sends (wavelength is 250-2000nm) switches mirror 23 change directions by the lamp source to be beaten on concave mirror 22, pools picture (rectangular light spot) to entrance slit 21 through concave mirror 22; Or the pink (wavelength is 185-400nm) that sends of deuterium lamp 25, because making the lamp source switch mirror 23, programmed control this moment lifts, so just directly beat on concave mirror 22, pool picture (circular light spot) to entrance slit 21 through concave mirror 22.Reflexed on the collimating mirror 28 by plane mirror 26 through entrance slit 21 light forward.Collimating mirror 28 reflects light to again on the grating 27, because grating has the beam split function, the light that reflects through grating 27 is exactly the monochromatic light bands of a spectrum of being arranged by the wavelength size order by monochromatic light.Band impinges upon again on the collimating mirror 28, because incident angle changes, the part monochromatic light that impinges upon collimating mirror 28 is reflected to optical filter 20, converge back directive sample solution by exit slit 19 planoconvex lenses 18 after optical filter 20 further filters, light drops on the silicon photocell receiver after sample solution absorbs at last.This monochromator selects wavelength automatically, and it is achieved in that as Fig. 2 lead screw motor drives screw mandrel 15 and rotates, 16 translations of screw mandrel 15 rotating band movable wire stem nuts, rotate thereby promote sinusoidal arm 17,, rotate so sinusoidal arm changes the 17 moving gratings 27 that drive again because sinusoidal arm 17 and grating 27 are assembled into one.Because grating 27 has resolved into complex light the monochromatic light bands of a spectrum of arranging by the wavelength size order, the rotation of grating 27 now causes being reflected in collimating mirror 28 top monochromatic light and has changed.Such as being green just now, changed into redness now, at last by collimating mirror 28 reflex to light on the optical filter 20 also have green become red.Light has become, and the optical filter color that works on the optical filter 20 also will become so, and the light of not so wanting has been filtered, and undesired light has spilt.Optical filter 20 is done corresponding rotation so that corresponding optical filter places on the light path so the optical filter motor drives again.Monochromator requires light path at same optical axial plane, the light path center will impinge upon or pass through optical element symmetrically, monochromator is debug for this reason finally pendulum light technology one, purpose is that the light that will allow light source send becomes out the brightest real image on silicon photocell, the curve of spectrum and optical standard curves that instrument is produced, such instrument wavelength accuracy and luminosity trueness error are little, and the wavelength accuracy of UV2102 series is 0.3nm at present, luminosity precision 0.3%T.

By as seen above-mentioned, there is following shortcoming in traditional UV2102 series monochromator structure: the optical element and the magazine part optical element reference for installation of (1) lamp source part are different, be called fabricated structure, the light path center is difficult to guarantee at an optical axial plane so as shown in Figure 1; (2) optical element of lamp source part and magazine part optical element installation direction are different, agree outer forward without prior consultation and agree interior reversal of the natural order of things installation without prior consultation, debug and put light again and again; (3) agree interior space narrow and small assembling pendulum light difficulty without prior consultation, when taking a lot of work; (4) the assembling link is many, is difficult to guarantee the light path consistance; (5) pendulum light first-time qualification rate difference will be repeatedly repeatedly 80%; (6) optical element in the after sale service difficulty, magazine can not got, and tear whole monochromator open, and the optical position of getting to like this on the photoelectric cell has become as Fig. 3, again bug check.

Summary of the invention:

The purpose of this utility model is, develops a kind of brand-new open monochromator light channel structure, and it is accurate to have light path, advantage easy to maintenance.

Specifically, UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure of the present utility model system, described system comprises some optical elements, it is characterized in that, described optical element is fixed on the same optical table of monochromator base plate.

Reasonablely be, described optical element comprises deuterium lamp, and mirror is switched in the lamp source, tungsten lamp, and concave mirror and collimating mirror are forward and install.

Reasonablely be, also comprise darkroom lid on the described monochromator base plate, described darkroom lid is for detachably being installed on the described monochromator base plate.

Reasonablely be, described system also comprises lamp house coaming plate, lamp house cover plate, complex light and monochromatic light are complex light by described lamp house coaming plate, described lamp house cover plate and described cassette cover nature separated into two parts and airtight separately in the wherein said lamp house coaming plate, are monochromatic light in the described cassette cover.

Reasonablely be, described system further comprises the screw mandrel group that drives grating, and the position of described screw mandrel group reduces and is fixed on the described optical table.

System of the present utility model has following characteristics: (1) all optical elements are installed on the same optical table, and the light path center can guarantee at an optical axial plane like this; (2) all optical elements are unified the forward installation, conveniently debug and put light; (3) Kuan Chang space, the light path trend comes into plain view, and finds mistake easily; (4) production efficiency height; (5) pendulum light first-time qualification rate height; (6) after sale service is simple to operation.

Description of drawings

Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Fig. 1 (a) and (b) are respectively the end face and the bottom surface structural drawing of the monochromator of traditional ultraviolet-visible pectrophotometer;

Fig. 2 is the light channel structure of the monochromator of traditional UV2102 series ultraviolet visible spectrophotometer;

Fig. 3 is the structural drawing of traditional UV2102 series ultraviolet visible spectrophotometer;

Fig. 4 (a) is the outside synoptic diagram of open monochromator light channel structure of the present utility model system;

Fig. 4 (b) is the structural representation after darkroom lid 30 is removed by open monochromator light channel structure of the present utility model system.

Embodiment

Fig. 4 (a) and (b) shown in monochromator be the external and internal compositions synoptic diagram of open monochromator light channel structure of the present utility model system.

This structure is different from the prior art part and is, comprises deuterium lamp, and mirror is switched in the lamp source, tungsten lamp, and all traditional optical elements such as concave mirror and collimating mirror all are fixed on the same optical table of monochromator base plate 33, and the light path precision is guaranteed; The splicing structure of traditional cartridge among Fig. 1 10 and lamp house frame 6 is improved to a single monochromator base plate 33, and the optical element forward is placed, so its vision spaciousness, and it is clear and intuitive that light path is moved towards, convenient pendulum light, error correction easily, easier teaching demonstration; Secondly, traditional cartridge 10 is the optical element reference for installation, is responsible for again monochromator (as Fig. 1 (a)) is installed to (as Fig. 3) on the instrument.Optical element in the magazine 10 is hidden by magazine 10, and optical element is changed in observation and maintenance will tear whole monochromator open, very inconvenient.Optical element is separate among Fig. 4 (b), and is installed on the same monochromator base plate 33.Its hermetically-sealed construction darkroom lid 30 is mounted on the monochromator base plate 33, can take off observation and maintenance separately and change optical element and do not need to tear open monochromator base plate 33.Only need move corresponding optical element like this when debugging or maintenance, and not need moving whole monochromator, the light path precision guarantees easily; Secondly its complex light and monochromatic light are by lamp house coaming plate 35, lamp house cover plate 32 and cassette cover 30 natural separated into two parts and airtight separately.In the lamp house coaming plate 35 is complex light, is monochromatic light in the cassette cover 30.The parasitic light of this sampling instrument is low, and optical element seldom has contamination by dust to improve optical element serviceable life, reduces user's instrument maintenance cost; Screw mandrel group (as irising out part among Fig. 4 (a)) position that drives grating in addition reduces and is fixed on the optical table, has outward in the seal closure, and vibration and noise reduce, and few dust erosion and heat source for baking are non-maintaining.This new monochromator has dropped into batch process at present, and it significantly promotes production efficiency, and pendulum light first-time qualification rate reaches 95%, debugs and reduces by 20% man-hour.Open monochromator is safeguarded instrument less.Change the motionless light path of optical element.

More than all embodiment only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technical schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.

Claims (5)

1.UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure system, described system comprises some optical elements, it is characterized in that,

Described optical element is fixed on the same optical table of monochromator base plate.

2. UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure according to claim 1 system is characterized in that described optical element comprises deuterium lamp, and mirror is switched in the lamp source, tungsten lamp, and concave mirror and collimating mirror are forward and install.

3. UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure according to claim 1 and 2 system is characterized in that,

Also comprise darkroom lid on the described monochromator base plate, described darkroom lid is for detachably being installed on the described monochromator base plate.

4. UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure according to claim 3 system, it is characterized in that, described system also comprises lamp house coaming plate, lamp house cover plate, complex light and monochromatic light are by described lamp house coaming plate, described lamp house cover plate and described cassette cover nature separated into two parts and airtight separately, in the wherein said lamp house coaming plate is complex light, is monochromatic light in the described cassette cover.

5. UV-2102PC+ ultraviolet-visible pectrophotometer monochromator light channel structure according to claim 4 system is characterized in that,

Described system further comprises the screw mandrel group that drives grating, and the position of described screw mandrel group reduces and is fixed on the described optical table.

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