CN110146471A - The design in the multiple round-trip reflected sample pond of small size - Google Patents
The design in the multiple round-trip reflected sample pond of small size Download PDFInfo
- Publication number
- CN110146471A CN110146471A CN201910188676.0A CN201910188676A CN110146471A CN 110146471 A CN110146471 A CN 110146471A CN 201910188676 A CN201910188676 A CN 201910188676A CN 110146471 A CN110146471 A CN 110146471A
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- distance
- millimeters
- mirror
- concave
- small size
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/066—Modifiable path; multiple paths in one sample
- G01N2201/0668—Multiple paths; optimisable path length
Abstract
The present invention relates to a kind of multiple round-trip reflected sample ponds of small size for absorption spectrum measurement, sample cell is made of two pieces of spherical surface concave mirrors, there are one or several light holes in the eccentric position of concave mirror, and the distance of two pieces of concave mirrors of the sample cell can be adjustable between the 30% ~ 150% of focal length.
Description
Technical field
The invention belongs to absorption spectroscopy techniques fields, design a kind of multiple round-trip reflected sample pond of optical length small in size,
It is provided simultaneously at low cost, easy-to-use feature.
Background technique
Absorption spectrum method is the common method for measuring chemical substance in sample, and wherein measurement accuracy and the limit follow blue rich
Beer law, i.e. I/Io=EXP (- α * l*C), wherein I/Io is through the ratio of light and transmitting light, i.e., transmissivity, α are samples
Absorption cross-section, l are absorption lengths, and C is sample concentration.
By described above, measurement accuracy, i.e., minimum measurement concentration and precision depend on absorption length.Length is longer, can be with
The minimum concentration and highest class precision measured is with regard to increase in direct ratio.It is exactly repeatedly past for increasing the most effectual way of absorption length
Reflected sample pond is returned, light beam roundtrip between two pieces of concave mirrors of sample cell reaches increase light path, while constraining light
Shu great little, so that the hot spot of light beam is not overlapped.
The traditional design in this repeatedly round-trip reflected sample pond is often the burnt design of Herriot copolymerization, i.e. two pieces of concave mirrors
Distance be maintained at twice of focal length of concave mirror or 2 radius lengths of spherical concave mirror on.Others design has using two
The design of block cylinder concave mirror or the design of aspherical concave mirror, but length is all longer, and reflecting mirror area is big, causes final
Cell volume it is larger.There are also reflected sample ponds to have used 3 pieces of sample cells, such as the pond WHITE.Newest repeatedly round-trip sample cell
It can be realized in a general radius length for spherical concave mirror, but volume is still larger.
The present invention further reduces the distance of two pieces of spherical concave mirrors, and minimum can achieve real in 1/3 radius length
It is existing, to be further reduced cell volume.
Summary of the invention
The present invention proposes a kind of smaller design of volume for the deficiency of existing repeatedly round-trip reflected sample pool technology.This
Method uses cheap spherical mirror.
The present invention solves technical problem and adopts the following technical scheme that
1. use spherical reflector, leave centre-drilling hole with by incident and outgoing beam, at the same centre-drilling hole in favor of
It is fixed；
2. using the tubular hollow circuit cylinder of interchangeable different length when vacuum sealing, to conveniently reach different samples
Product pond length；
3. length is adjusted, incident light angle, and outgoing optical position.
Multiple round-trip reflected sample pond of the present invention for absorption spectrum is to prepare in accordance with the following steps:
(1) 50 mm dia of spherical concave mirror, 100 millimeters of radiuses, plating protection golden film after optical polish；Or it directlys adopt not
The metal molybdenum mirror of plated film；
(2) spherical concave mirror center and the light passing circular hole for leaving 2 2.5 mm dias of processing at 15 millimeters of center；
(3) 2 spherical concave mirrors are fixed on inside vacuum-packed device, the metal block of two fixed concave mirrors its
In one can rotate adjustment to facilitate light beam to pass in and out；
(4) the sealing material length between the metal block by changing two fixed concave mirrors, usually cylindrical material,
It can change the distance between two concave mirrors, distance is adjustable between 70 millimeters to 75 millimeters；
(5) incident ray is more than 12 millimeters of distance by the distance that opposite concave mirror is incident in 15 millimeters of distance of hole,
By the distance between two concave mirrors of careful adjustment incident angle and change, there are also second piece of concave mirror is rotated, that is, adjust out
The position of perforation, available different order of reflection and flare pattern, to realize different multiple reflect back and forth
Light path.
The invention has the advantages that:
Multiple round-trip reflected sample pond of the present invention for absorption spectrum greatly reduces cell volume, so that sample is more
New speed and demand greatly reduce.Physical length also greatly reduces simultaneously, so that equipment instrument is more compact.The ball used simultaneously
Concave mirror production in face is simple, and cost substantially reduces.User can easily adjust out when in use required hot spot be familiar with it is several
What pattern, is conveniently adjusted.
Detailed description of the invention
Fig. 1 is the flare pattern obtained using the multiple round-trip reflected sample pond of the embodiment of the present invention 1.
Fig. 2 is the flare pattern obtained using the multiple round-trip reflected sample pond of the embodiment of the present invention 2.
Specific embodiment
Embodiment 1
(1) 25 mm dia of spherical concave mirror, 50 millimeters of radiuses, plating protection golden film after optical polish；
(2) spherical concave mirror center and the light passing circular hole for leaving 22 mm dias of processing at 8 millimeters of center.
(3) 2 spherical concave mirrors are fixed on inside vacuum-packed device, the metal block of two fixed concave mirrors its
In one can rotate light beam easy to adjust disengaging.
(4) the sealing material length between the metal block by changing two fixed concave mirrors, usually cylindrical material,
It can change the distance between two concave mirrors, distance is adjustable between 28 millimeters to 29 millimeters.
(5) incident ray is more than 5 millimeters of distance by the distance that opposite concave mirror is incident in 8 millimeters of distance of hole, is led to
The distance between cross careful adjustment incident angle and change two concave mirrors, there are also second piece of concave mirror is rotated, i.e. adjustment outgoing
The position in hole, available different order of reflection and flare pattern as shown in Figure 1, reflect for 48 times back and forth to realize
Totally 2.78 meters of light path, sample volume only have 13 milliliters.
Embodiment 2
(1) 50 mm dia of spherical concave mirror, 100 millimeters of radiuses, plating protection golden film after optical polish；
(2) spherical concave mirror center and the light passing circular hole for leaving 2 2.5 mm dias of processing at 19 millimeters of center；
(3) 2 spherical concave mirrors are fixed on inside vacuum-packed device, the metal block of two fixed concave mirrors its
In one can rotate light beam easy to adjust disengaging；
(4) the sealing material length between the metal block by changing two fixed concave mirrors, usually cylindrical material,
It can change the distance between two concave mirrors, distance is adjustable between 50 millimeters to 55 millimeters；
(5) incident ray is more than 12 millimeters of distance by the distance that opposite concave mirror is incident in 19 millimeters of distance of hole,
By the distance between two concave mirrors of careful adjustment incident angle and change, there are also second piece of concave mirror is rotated, that is, adjust out
The position of perforation, available different order of reflection and flare pattern are as shown in Fig. 2, to realize that different 128 are past
Return 21.5 meters of light paths of reflection.
Claims (5)
1. a kind of multiple round-trip reflected sample pond of small size for absorption spectrum measurement, sample cell is by two pieces of spherical surface concave reflections
Mirror is constituted, and there are one or several light holes, two pieces of concave mirrors of the sample cell in the eccentric position of concave mirror
Distance can be adjustable between the 1/2 ~ 150% of focal length.
2. a kind of multiple round-trip reflected sample pond of small size for absorption spectrum measurement according to claim 1, special
Sign is: also there is a hole at the center of two pieces of concave mirrors of the sample cell, to facilitate fixation.
3. a kind of multiple round-trip reflected sample pond of small size for absorption spectrum measurement according to claim 1, special
Sign is: the sealed outer ring of the sample cell has rotatable device, enters and leaves light combination in order to adjust.
4. a kind of multiple round-trip reflected sample pond of small size for absorption spectrum measurement according to claim 1, special
Sign is: reflecting mirror material can plate protection golden film, be also possible to the metal molybdenum mirror of not plated film.
5. a kind of multiple round-trip reflected sample pond of small size for absorption spectrum measurement according to claim 1, special
It is prepared by sign such as following step:
(1) 50 mm dia of spherical concave mirror, 100 millimeters of radiuses, plating protection golden film after optical polish, or directly adopt not plated film
Metal molybdenum mirror；
(2) spherical concave mirror center and the light passing circular hole for leaving 2 2.5 mm dias of processing at 15 millimeters of center；
(3) 2 spherical concave mirrors are fixed on inside vacuum-packed device, and wherein the one of the metal block of two fixed concave mirrors
It is a to rotate adjustment to facilitate light beam to pass in and out；
(4) the sealing material length between the metal block by changing two fixed concave mirrors, usually cylindrical material can be with
Change the distance between two concave mirrors, distance is adjustable between 33 millimeters to 75 millimeters；
(5) incident ray is more than 12 millimeters of distance by the distance that opposite concave mirror is incident in 15 millimeters of distance of hole, is passed through
The distance between adjust incident angle and change two concave mirrors, there are also second piece of concave mirror is rotated, that is, adjust the position of perforation hole
It sets, available different order of reflection and flare pattern, to realize the different multiple light paths reflected back and forth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188676.0A CN110146471A (en) | 2019-03-13 | 2019-03-13 | The design in the multiple round-trip reflected sample pond of small size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910188676.0A CN110146471A (en) | 2019-03-13 | 2019-03-13 | The design in the multiple round-trip reflected sample pond of small size |
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| Publication Number | Publication Date |
|---|---|
| CN110146471A true CN110146471A (en) | 2019-08-20 |
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ID=67588208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910188676.0A Pending CN110146471A (en) | 2019-03-13 | 2019-03-13 | The design in the multiple round-trip reflected sample pond of small size |
Country Status (1)
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| CN (1) | CN110146471A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987813A (en) * | 2019-12-26 | 2020-04-10 | 深圳华领医学技术有限公司 | Combined type optical enhancement absorption cell |
| CN113049534A (en) * | 2019-12-26 | 2021-06-29 | 北京师范大学 | Method and computing device for determining light spot distribution in multiple gas reflecting chambers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201732052U (en) * | 2010-06-30 | 2011-02-02 | 中国科学院安徽光学精密机械研究所 | Optical-path-adjustable open-type multiple reflecting pool for gas content online monitoring |
| CN103430010A (en) * | 2011-03-24 | 2013-12-04 | 激光传感公司 | Multipass cell using spherical mirrors while achieving dense spot patterns |
| CN105445196A (en) * | 2014-12-17 | 2016-03-30 | 邓文平 | Sample measuring cell |
| CN105466855A (en) * | 2015-12-31 | 2016-04-06 | 力合科技（湖南）股份有限公司 | Sample detecting device based on Herroitt multi-reflect pool |
| CN106124404A (en) * | 2016-07-21 | 2016-11-16 | 中国科学院合肥物质科学研究院 | A kind of multiple reflections absorbs sample cell |
| CN109557028A (en) * | 2018-12-09 | 2019-04-02 | 山西大学 | A kind of multi-pass pond with intensive spot pattern |
-
2019
- 2019-03-13 CN CN201910188676.0A patent/CN110146471A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201732052U (en) * | 2010-06-30 | 2011-02-02 | 中国科学院安徽光学精密机械研究所 | Optical-path-adjustable open-type multiple reflecting pool for gas content online monitoring |
| CN103430010A (en) * | 2011-03-24 | 2013-12-04 | 激光传感公司 | Multipass cell using spherical mirrors while achieving dense spot patterns |
| CN105445196A (en) * | 2014-12-17 | 2016-03-30 | 邓文平 | Sample measuring cell |
| CN105466855A (en) * | 2015-12-31 | 2016-04-06 | 力合科技（湖南）股份有限公司 | Sample detecting device based on Herroitt multi-reflect pool |
| CN106124404A (en) * | 2016-07-21 | 2016-11-16 | 中国科学院合肥物质科学研究院 | A kind of multiple reflections absorbs sample cell |
| CN109557028A (en) * | 2018-12-09 | 2019-04-02 | 山西大学 | A kind of multi-pass pond with intensive spot pattern |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987813A (en) * | 2019-12-26 | 2020-04-10 | 深圳华领医学技术有限公司 | Combined type optical enhancement absorption cell |
| CN113049534A (en) * | 2019-12-26 | 2021-06-29 | 北京师范大学 | Method and computing device for determining light spot distribution in multiple gas reflecting chambers |
| CN110987813B (en) * | 2019-12-26 | 2022-10-21 | 深圳华领医学技术有限公司 | Combined type optical enhancement absorption cell |
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