CN211402130U - Double light source device of ultraviolet-visible-near infrared spectrophotometer - Google Patents
Double light source device of ultraviolet-visible-near infrared spectrophotometer Download PDFInfo
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- CN211402130U CN211402130U CN202020047387.7U CN202020047387U CN211402130U CN 211402130 U CN211402130 U CN 211402130U CN 202020047387 U CN202020047387 U CN 202020047387U CN 211402130 U CN211402130 U CN 211402130U
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Abstract
The utility model discloses a two light source devices of ultraviolet-visible-near infrared spectrophotometer, it includes bottom plate and dustcoat, is equipped with mount and optics turn-over frame on the bottom plate, is equipped with deuterium lamp and halogen tungsten lamp on the mount, and the optical axis of deuterium lamp is parallel with the optical axis of halogen tungsten lamp, is equipped with quartz lens, lower dichroic mirror and last dichroic mirror on the optics turn-over frame. The centers of the quartz lens and the lower dichroic mirror are both positioned on the optical axis of the deuterium lamp, and the lower dichroic mirror and the optical axis of the deuterium lamp are arranged at an angle of 45 degrees. The center of the upper dichroic mirror is positioned on the optical axis of the optical axis halogen tungsten lamp of the deuterium lamp, and the upper dichroic mirror is positioned above the lower dichroic mirror and is parallel to the lower dichroic mirror. The outer cover is provided with an exit port, and the center of the exit port is positioned on the optical axis of the halogen tungsten lamp. The utility model discloses a set up two dichroic mirrors on the light path of deuterium lamp, can filter the strong spectral line in visible light area among the deuterium lamp pertinence, improve the ultraviolet visible region's of light source dynamic range.
Description
Technical Field
The utility model relates to a technical field of light source for the analysis and detection, in particular to two light source devices of ultraviolet-visible-near infrared spectrophotometer.
Background
An ultraviolet-visible-near infrared spectrophotometer (UV-VIS-NIR Spectrometer) is a photoelectric analyzer which utilizes the selective absorption phenomenon of substances to light to perform qualitative and quantitative analysis on the substances, and is widely applied to the related fields of material detection, environment/water quality detection, food detection and the like.
The existing ultraviolet-visible-near infrared spectrophotometer generally adopts a deuterium lamp in the ultraviolet region of a light source, adopts a halogen tungsten lamp in the visible-near infrared region, and because the spectrum of the deuterium lamp has strong spectral lines in the visible region, the spectral lines can influence the dynamic range of the whole spectral band, which can bring adverse effects to spectral test and data processing.
SUMMERY OF THE UTILITY MODEL
To the problems existing in the prior art, the main object of the present invention is to provide a dual light source device of an ultraviolet-visible-near infrared spectrophotometer, which can purposefully filter the spectral line of a deuterium lamp, and improve the dynamic range of the whole spectral range.
To achieve the above object, the present invention provides a dual light source device of an ultraviolet-visible-near infrared spectrophotometer, which comprises a bottom plate and an outer cover. The optical turning frame is provided with a quartz lens, a lower dichroic mirror and an upper dichroic mirror.
The centers of the quartz lens and the lower dichroic mirror are both positioned on the optical axis of the deuterium lamp, and the lower dichroic mirror and the optical axis of the deuterium lamp are arranged at an angle of 45 degrees. The center of the upper dichroic mirror is positioned on the optical axis of the optical axis halogen tungsten lamp of the deuterium lamp, and the upper dichroic mirror is positioned above the lower dichroic mirror and is parallel to the lower dichroic mirror.
An exit port is arranged on the outer cover, and the center of the exit port is positioned on the optical axis of the halogen tungsten lamp.
Optionally, the optical hinge has an inclined portion and a vertical portion. A light-passing channel is arranged in the inclined part, and the light-emitting side of the light-passing channel is opposite to the emergent port. The upper side wall and the lower side wall of the light passing channel are respectively provided with an upper light passing hole and a lower light passing hole, the lower dichroic mirror is arranged on the lower light passing hole, and the upper dichroic mirror is arranged on the upper light passing hole. The vertical part is provided with a light inlet hole opposite to the light inlet side of the light through channel, and the quartz lens is arranged in the light inlet hole.
Optionally, the outer aperture edge of the upper light passing hole and the outer aperture edge of the lower light passing hole are respectively provided with an upper groove and a lower square groove, the upper dichroic mirror is fixed in the upper groove through a welding glue, and the lower dichroic mirror is fixed in the lower square groove through a welding glue.
Optionally, the quartz lens is fixed in the light inlet hole through a snap ring.
Optionally, the bottom plate has a side plate portion, the side plate portion is provided with a ventilation hole, and a cooling fan is arranged outside the ventilation hole.
Optionally, a plurality of air inlet holes are formed in the outer cover, and the air inlet holes are uniformly distributed on the outer peripheral side of the outer cover.
Optionally, the heat dissipation fan is a turbofan.
The technical scheme of the utility model through set up two dichroic mirrors in the light path of deuterium lamp, can filter the strong spectral line in visible region in the deuterium lamp pertinence, improve the ultraviolet visible region's of light source dynamic range.
Drawings
Fig. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
fig. 3 is a cross-sectional view of the light source portion of the present invention;
FIG. 4 is a schematic structural diagram of an optical folding frame;
fig. 5 is a schematic view of the optical path of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2 of the specification, an embodiment of the present invention provides a dual light source device for an ultraviolet-visible-near infrared spectrophotometer, the dual light source device includes a bottom plate 100 and an outer cover 200, the bottom plate 100 is provided with a fixing frame 300 and an optical turning frame 400, and the outer cover 200 covers the fixing frame 300 and the optical turning frame 400 and is fixed on the bottom plate 100 through M3 screws.
As shown in fig. 2-3, the fixing frame 300 is L-shaped and is fixed on the base plate 100 by M3 screws. A tungsten lamp holder 311 is disposed on a side wall of the fixing frame 300, a halogen tungsten lamp 310 is inserted into the tungsten lamp holder 311, a deuterium lamp 320 is disposed on a side wall of the fixing frame 300, the deuterium lamp 320 is located below the halogen tungsten lamp 310, and an optical axis of the halogen tungsten lamp 310 and an optical axis of the deuterium lamp 320 are aligned. The optical turning frame 400 is provided with a quartz lens 410, a lower dichroic mirror 420 and an upper dichroic mirror 430, the centers of the quartz lens 410 and the lower dichroic mirror 420 are both located on the optical axis of the deuterium lamp 320, and the lower dichroic mirror 420 and the optical axis of the deuterium lamp 320 are arranged at an angle of 45 °. The center of the upper dichroic mirror 430 is located on the optical axis of the optical axis halogen lamp 310 of the deuterium lamp 320, and the upper dichroic mirror 430 is located above the lower dichroic mirror 420 and parallel to the lower dichroic mirror 420. The housing 200 is provided with an exit port 201, and the center of the exit port 201 is located on the optical axis of the halogen lamp 310.
In operation, as shown in fig. 5, visible-infrared light emitted from the tungsten halogen lamp 310 is transmitted to the exit port 201 via the upper dichroic mirror 430 disposed at an angle of 45 °. Light emitted by the deuterium lamp 320 is converged into a light beam through the quartz lens 410, the light beam is transmitted and reflected through the lower dichroic mirror 420 and the upper dichroic mirror 430 in sequence, a spectral line with strong visible light area in the light beam is filtered, ultraviolet light in the light beam is partially reflected to the light path of the tungsten halogen lamp 310, is combined with visible-infrared light transmitted from the light path of the tungsten halogen lamp 310, and is finally coaxially output from the exit port 201.
The technical scheme of the utility model through set up two parallels and 45 dichroic mirror that the slope was placed on the light path at deuterium lamp 320, the light that deuterium lamp 320 sent is through two dichroic mirror transmission reflection backs, can filter the strong spectral line in the visible light region of deuterium lamp 320 with pertinence, improves the dynamic range in ultraviolet region, again with the visible-infrared optical coupling of coming from the light path transmission of halogen tungsten lamp 310 to provide the ultraviolet to near infrared's broad spectrum light beam.
Alternatively, as shown in fig. 4, in the present embodiment, the optical folding stand 400 has an inclined portion 402 and a vertical portion 401. A light-transmitting channel is provided in the inclined portion 402, and the light-emitting side of the light-transmitting channel faces the exit port 201. The upper side wall and the lower side wall of the light passing channel are respectively provided with an upper light passing hole 402a and a lower light passing hole 402b, the lower dichroic mirror 420 is arranged on the lower light passing hole 402b, and the upper dichroic mirror 430 is arranged on the upper light passing hole 402 a. The vertical portion 401 is provided with a light entrance hole 401a opposite to the light entrance side of the light passing channel, and the quartz lens 410 is fixed in the light entrance hole by a snap ring 411. To facilitate mounting of the dichroic mirror, an upper groove 402c and a lower square groove 402d are provided at the outer aperture edges of the upper light passing hole 402a and the lower light passing hole 402b, respectively, the upper dichroic mirror 430 is fixed in the upper groove 402c by a solder paste, and the lower dichroic mirror 420 is fixed in the lower square groove 402d by a solder paste.
Alternatively, as shown in fig. 1-2, in the present embodiment, the bottom plate 100 has a side plate portion 101, a vent hole is provided on the side plate portion 101, a heat dissipation fan 500 is provided outside the vent hole, and the heat dissipation fan 500 is a turbo fan. The outer cover 200 is provided with 8 air inlet holes 202, and the 8 air inlet holes 202 are all arranged on the outer periphery side of the outer cover 200. When the heat dissipation fan 500 works, external air enters the housing 200 through 8 air inlet holes of the housing 200 and is exhausted by the heat dissipation fan 500 to form an external circulation. Therefore, heat generated by the deuterium lamp 320 and the halogen tungsten lamp 310 is discharged through external circulation, the heat dissipation efficiency of the deuterium lamp 320 and the halogen tungsten lamp 310 is improved, and the service life of the deuterium lamp 320 and the halogen tungsten lamp 310 is ensured.
The above is only the preferred embodiment of the present invention, not used in the present invention, and any slight modifications, equivalent replacements and improvements made by the technical entity of the present invention to the above embodiments should be included in the protection scope of the technical solution of the present invention.
Claims (7)
1. A dual light source apparatus for an ultraviolet-visible-near infrared spectrophotometer, comprising:
the bottom plate is provided with a fixing frame and an optical turning frame, the fixing frame is provided with a deuterium lamp and a halogen tungsten lamp, the optical axis of the deuterium lamp is parallel to the optical axis of the halogen tungsten lamp, and the optical turning frame is provided with a quartz lens, a lower dichroic mirror and an upper dichroic mirror;
the centers of the quartz lens and the lower dichroic mirror are both positioned on the optical axis of the deuterium lamp, and the lower dichroic mirror and the optical axis of the deuterium lamp are arranged at an angle of 45 degrees; the center of the upper dichroic mirror is positioned on the optical axis of the optical axis halogen tungsten lamp of the deuterium lamp, and the upper dichroic mirror is positioned above the lower dichroic mirror and is parallel to the lower dichroic mirror;
and the outer cover is provided with an exit port, and the center of the exit port is positioned on the optical axis of the halogen tungsten lamp.
2. The dual light source apparatus of an uv-vis-nir spectrophotometer according to claim 1, wherein the optical hinge has an inclined portion and a vertical portion;
a light-transmitting channel is arranged in the inclined part, and the light-emitting side of the light-transmitting channel is opposite to the emergent port; the upper side wall and the lower side wall of the light passing channel are respectively provided with an upper light passing hole and a lower light passing hole, the lower dichroic mirror is arranged on the lower light passing hole, and the upper dichroic mirror is arranged on the upper light passing hole;
the vertical part is provided with a light inlet hole opposite to the light inlet side of the light through channel, and the quartz lens is arranged in the light inlet hole.
3. The dual light source apparatus of uv-vis-nir spectrophotometer according to claim 2, wherein the outer aperture edges of the upper clear aperture and the lower clear aperture are provided with an upper groove and a lower square groove, respectively, the upper dichroic mirror is fixed in the upper groove by a solder paste, and the lower dichroic mirror is fixed in the lower square groove by a solder paste.
4. A dual light source apparatus of an uv-vis-nir spectrophotometer according to claim 2, wherein the quartz lens is fixed in the light inlet hole by a snap ring.
5. The dual light source device of an uv-vis-nir spectrophotometer according to any one of claims 1 to 4, wherein the base plate has a side plate portion provided with a ventilation hole, and a cooling fan is provided outside the ventilation hole.
6. The dual light source apparatus of an uv-vis-nir spectrophotometer according to claim 5, wherein the outer cover is provided with a plurality of air inlet holes, the air inlet holes being uniformly distributed on the outer peripheral side of the outer cover.
7. The dual light source apparatus of an uv-vis-nir spectrophotometer according to claim 5, wherein the heat radiation fan is a turbo fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020047387.7U CN211402130U (en) | 2020-01-09 | 2020-01-09 | Double light source device of ultraviolet-visible-near infrared spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020047387.7U CN211402130U (en) | 2020-01-09 | 2020-01-09 | Double light source device of ultraviolet-visible-near infrared spectrophotometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211402130U true CN211402130U (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020047387.7U Active CN211402130U (en) | 2020-01-09 | 2020-01-09 | Double light source device of ultraviolet-visible-near infrared spectrophotometer |
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| Country | Link |
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| CN (1) | CN211402130U (en) |
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2020
- 2020-01-09 CN CN202020047387.7U patent/CN211402130U/en active Active
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