CN202928952U - DOAS (Differential Optical Absorption Spectroscopy) telescope - Google Patents
DOAS (Differential Optical Absorption Spectroscopy) telescope Download PDFInfo
- Publication number
- CN202928952U CN202928952U CN 201220667775 CN201220667775U CN202928952U CN 202928952 U CN202928952 U CN 202928952U CN 201220667775 CN201220667775 CN 201220667775 CN 201220667775 U CN201220667775 U CN 201220667775U CN 202928952 U CN202928952 U CN 202928952U
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- China
- Prior art keywords
- doas
- telescope
- eyeglass
- optical absorption
- absorption spectroscopy
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model provides a DOAS (Differential Optical Absorption Spectroscopy) telescope. A lens (7) is fixed in right front of a lens barrel of the DOAS telescope, and a heating band (3) contacted with the lens (7) is arranged on a columnar surface of the lens (7). The utility model aims at providing the DOAS telescope which is not affected by the outdoor temperature, simple in structure, convenient to use and low in cost.
Description
Technical field
The utility model relates to a kind of DOAS telescope.
Background technology
Differential optical absorption spectroscopy, being called for short DOAS technology (Differential Optical Absorption Spectroscopy) was proposed by people such as PLATT in the 70's of 20th century, the method is when utilizing light to transmit in atmosphere, and in atmosphere, various gas molecules have the characteristic of different Difference Absorption to come the concentration of these minimum gas of inverting in atmosphere at different wave bands to it.To late 1980s, the DOAS technology has obtained approval widely in European Union's scope as a kind of atmospheric monitoring system.
The course of work that adopts the DOAS telescope to carry out air detection is: the light that xenon lamp sends is reflexed to the outside part of primary mirror by the secondary mirror in telescope, be directional light directive corner reflector at a distance by collimation, assembled by the inside of a primary mirror part from the light that corner reflector is reflected back, again after secondary reflection, be gathered at last the incident end face of optical fiber through secondary mirror.Light is by after optical fiber, incide the entrance slit of monochromator, through monochromator splitting, shine the outgoing window of monochromator, be arranged in bands of a spectrum by the wavelength size, ccd detector is arranged on the outgoing window of monochromator, is arranged on the outgoing window of monochromator according to thereon photodetector, is converted into digital signal according to thereon light signal and sends into computing machine and process.Just can obtain a spectrum to the every run-down of the pixel of CCD, in order to improve signal to noise ratio (S/N ratio), process again after generally thousands of spectrum are average in real work, be approximately 5min each measuring period.Light path should be light source to the twice of corner reflector distance.Measurement result is the mean value of gaseous mass concentration on whole light path.
But, when adopting this kind equipment to carry out the atmosphere detection, when environment temperature is very low, particularly in northern cold winter, because the telescope tube front end is exposed in air, the window mirror of front end (being quartz glass) easily produces the water smoke spray, has had a strong impact on the accuracy of measuring.
Summary of the invention
The purpose of this utility model is: provide a kind of and be not subjected to that outdoor temperature affects, simple in structure, easy to use, cheap DOAS telescope.
A kind of DOAS telescope of the utility model is fixed an eyeglass in the telescopical lens barrel of described DOAS dead ahead, and the face of cylinder of described eyeglass is provided with and the contacted heating tape of eyeglass.
Adopt technique scheme, described heating tape is by being fixed on the face of cylinder of eyeglass with suitable inner ring, outer ring and the screw of eyeglass.
In sum, the beneficial effects of the utility model are: by adopting the DOAS telescope of this kind structure, be not subjected to outdoor temperature affect, simple in structure, easy to use, cheap.
Description of drawings
Fig. 1 is schematic diagram of the present utility model;
In figure: 1 outer ring, 2 inner rings, 3 heating tapes, 4 station windowpanes, 5 silicagel pad, 6 compacting rings, 7 eyeglasses, 8 screws.
Embodiment
Below in conjunction with embodiment, the utility model is described further:
As shown in Figure 1, the present embodiment comprises: fix an eyeglass 8 in the telescopical lens barrel of described DOAS dead ahead, the face of cylinder of described eyeglass 7 is provided with and the contacted heating tape 3 of eyeglass 7.Described heating tape 3 is by being fixed on the face of cylinder of eyeglass 7 with suitable inner ring 2, outer ring 1 and the screw 8 of eyeglass 7.
The utility model is to use like this: the indoor glass place that the fixing eyeglass 7 in the telescopical lens barrel of above-mentioned DOAS dead ahead is placed on the station windowpane 4 of the place station that needs the monitoring air, and lay successively silicagel pad 5 and compacting ring 6 in station windowpane 4 outdoor relevant position, and by screw 8, above-mentioned silicagel pad 5, compacting ring 6 are fixed together with windowpane 4 and eyeglass 7, can realize the DOAS telescope is placed in station and can monitor air.For making fastening more firm of above-mentioned each assembly, be coated with glass cement on the indoor glass in above-mentioned outer ring 1 with station windowpane 4, silicagel pad 5 and the outdoor surface of contact of station windowpane 4.
Claims (2)
1. DOAS telescope is characterized in that fixing an eyeglass (7) in the telescopical lens barrel of described DOAS dead ahead, and the face of cylinder of described eyeglass (7) is provided with and the contacted heating tape of eyeglass (7) (3).
2. a kind of DOAS telescope according to claim 1 is characterized in that described heating tape (3) is by being fixed on the face of cylinder of eyeglass (7) with suitable inner ring (2), outer ring (1) and the screw (8) of eyeglass (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667775 CN202928952U (en) | 2012-12-07 | 2012-12-07 | DOAS (Differential Optical Absorption Spectroscopy) telescope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220667775 CN202928952U (en) | 2012-12-07 | 2012-12-07 | DOAS (Differential Optical Absorption Spectroscopy) telescope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202928952U true CN202928952U (en) | 2013-05-08 |
Family
ID=48218903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220667775 Expired - Lifetime CN202928952U (en) | 2012-12-07 | 2012-12-07 | DOAS (Differential Optical Absorption Spectroscopy) telescope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202928952U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560591A (en) * | 2017-09-12 | 2018-01-09 | 浙江宏泰工程项目管理有限公司 | If the theodolite of heated type telescope |
-
2012
- 2012-12-07 CN CN 201220667775 patent/CN202928952U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560591A (en) * | 2017-09-12 | 2018-01-09 | 浙江宏泰工程项目管理有限公司 | If the theodolite of heated type telescope |
| CN107560591B (en) * | 2017-09-12 | 2020-08-07 | 浙江宏泰工程项目管理有限公司 | Theodolite with heating telescope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
|
| CX01 | Expiry of patent term |