CN105891921B - A kind of beam splitting prism attachment generated without interference reference light - Google Patents
A kind of beam splitting prism attachment generated without interference reference light Download PDFInfo
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- CN105891921B CN105891921B CN201410758337.9A CN201410758337A CN105891921B CN 105891921 B CN105891921 B CN 105891921B CN 201410758337 A CN201410758337 A CN 201410758337A CN 105891921 B CN105891921 B CN 105891921B
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Abstract
The invention discloses a kind of beam splitting prism attachments generated without interference reference light, the left side of the Amici prism is the plane of incidence, and right side is detection faces, wherein, it is equipped with the first inclined-plane between the upper side and detection faces of Amici prism, the second inclined-plane is equipped between the downside and the plane of incidence of Amici prism；The first angle is formed between above-mentioned first inclined-plane and the upper side of Amici prism, and the second angle is formed between the second inclined-plane and the plane of incidence.The invention avoids the multiple reflections superpositions of common parallel light splitting piece output beam, and can effectively improve when causing optical wavelength to change because of temperature change, improve the stability of light source power detection.
Description
Technical field
Environmental monitoring field of the present invention refers in particular to a kind of beam splitting prism attachment generated without interference reference light.
Background technique
Particle concentration monitor is instrument indispensable in environmental monitoring, this kind of monitor can be provided to environment supervision department
Quickly, soot emissions data reliably and are accurately quantified.According to technical requirements HJ/T 75-2007, the HJ/T 76- of environmental protection administration
2007, for the accuracy for guaranteeing monitoring instrument itself, need to calibrate instrument.Existing particle concentration monitor calibration cartridge
Set using parallel spectroscope, when calibration, often generate interference, due to the ambient temperature range of instrument work it is big (- 20 DEG C~+
50 DEG C), laser wavelength with temperature changes and change, and if spectroscope generates interference light, the stability that instrument detects is just very
Difficulty meets design requirement.
Summary of the invention
The technical problem to be solved by the present invention is in view of the above shortcomings of the prior art, provide one kind to avoid commonly in parallel
The multiple reflections of light splitting piece output beam are superimposed, and can be effectively improved when causing optical wavelength to change because of temperature change, light source power
The beam splitting prism attachment without interference reference light of the stability of detection.
The technical solution adopted by the present invention is as follows: a kind of Amici prism, the left side of the Amici prism are the plane of incidence, right side
Face is detection faces, wherein between the upper side and detection faces of Amici prism be equipped with the first inclined-plane, the downside of Amici prism with enter
It penetrates and is equipped with the second inclined-plane between face；The first angle, the second inclined-plane are formed between above-mentioned first inclined-plane and the upper side of Amici prism
The second angle is formed between the plane of incidence, incident beam is injected in Amici prism through the plane of incidence, and inspection is injected after the plane of incidence reflects
Survey face, is respectively formed calibration beam after detection faces reflect and reflect and detection light beam, calibration beam are vertically incident upon the second inclined-plane,
And it is projected through the second inclined-plane.
Preferably, the angle of first angle is respectively 100-150 degree, and the angle of the second angle is 120-160 degree.
Preferably, the Amici prism is set to the laser beam emission port of on-line continuous particle concentration detector
Side, and the beam emissions mouth of the incident surface A alignment laser of Amici prism；The lower part of Amici prism is equipped with reflective mirror, light splitting
What prism projected injects in reflective mirror without interference correction light beam, and through mirror reflection to on-line continuous particle concentration detector
Lens, enter in the photodetector of on-line continuous particle concentration detector through lens, to be calibrated.
The beneficial effects of the present invention are:
Amici prism of the invention, which can be realized, is divided into the mutually orthogonal no interference light of two beams for light beam, so as to avoid
The multiple reflections of common parallel light splitting piece output beam are superimposed (interference), can effectively improve because temperature change causes optical wavelength to change
When, the stability of light source power detection.Self-checking device of the invention is a kind of pair of on-line continuous particle concentration monitor
Self-checking device, it is at low cost, can get stable optical signal, and pass to monitoring instrument as a standard reference value,
It can be automatically controled and periodically monitoring instrument is calibrated, it is easy to maintain.
Detailed description of the invention
Fig. 1 is the light splitting schematic diagram of Amici prism of the present invention.
Fig. 2 is existing parallel spectroscopical light splitting schematic diagram.
The detection data schematic diagram that Fig. 3 is Amici prism 24 hours in Fig. 1.
Fig. 4 is 24 hours detection data schematic diagrames of parallel spectroscope in Fig. 2.
Fig. 5 is the structural schematic diagram of Amici prism of the present invention.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described:
As shown in Figures 1 to 5, the technical solution adopted by the present invention is as follows: a kind of Amici prism, the left side of the Amici prism
Face is incident surface A, and right side is detection faces B, wherein the first inclined-plane a is equipped between the upper side and detection faces B of Amici prism,
The second inclined-plane b is equipped between the downside and incident surface A of Amici prism；The upper side of above-mentioned first inclined-plane a and Amici prism it
Between form the first angle D, form the second angle E between the second inclined-plane b and incident surface A, incident beam is injected through incident surface A and is divided
In prism, detection faces B is injected after incident surface A reflects, calibration beam and detection are respectively formed after detection faces B reflects and reflects
Light beam, calibration beam is vertically incident upon the second inclined-plane b, and projects through the second inclined-plane b.
The angle of first angle D is respectively 100-150 degree, and the angle of the second angle E is 120-160 degree.
Amici prism is set to the laser beam emission port side of on-line continuous particle concentration detector, and is divided rib
The beam emissions mouth of the incident surface A alignment laser of mirror；The lower part of Amici prism is equipped with reflective mirror, and the nothing that Amici prism projects is dry
It relates to calibration beam to inject in reflective mirror, and through mirror reflection to the lens of on-line continuous particle concentration detector, through lens
Into in the photodetector of on-line continuous particle concentration detector, to be calibrated.
Further, a kind of self-checking device with Amici prism, including being arranged in mounting base, laser divides
Light prism, light barrier, reflective mirror, lens and photodetector are divided rib wherein the left part of mounting base is arranged in above-mentioned laser
The right side of laser is arranged in mirror, and the beam emissions mouth of the incident surface A alignment laser of Amici prism, light barrier setting are dividing
The lower part of light prism；The lower left quarter of light barrier is arranged in above-mentioned reflective mirror, and the calibration beam that Amici prism projects injects reflective mirror
It is interior, and through mirror reflection to lens, enter in photodetector through lens.Light barrier is connected in mounting base by shaft,
Light barrier connects the motor of peripheral hardware, and motor driven light barrier is rotated around the shaft, blocked to rotate light barrier to parallel position
Pass through calibration beam on the right side of calibration beam, or rotation to Amici prism and reflective mirror.Reflective mirror, lens and photodetector
It is arranged in fixing seat, fixing seat is arranged in mounting base, and the lower part of Amici prism is arranged in；Said lens are arranged reflective
The left side of mirror, calibration beam enter in lens after mirror reflection；The left side of lens is arranged in above-mentioned photodetector, calibration
Light beam is injected in photodetector through lens, is calibrated.Mounting base is fixed on calibrating installation frame body, and calibrating installation frame body is set
It sets on the right side of mounting base.
Further, as shown in Fig. 2, existing parallel spectroscopical working principle: parallel light splitting piece is A towards incident beam
Face, projecting detection light beam is the face B.When the incident beam that Laser emission goes out, first is incident on the light splitting face eyeglass A and generates two beams
Light: being reflected into calibration beam, is refracted as detection light beam；When detection light beam is to the face B, two-beam is generated again, is refracted as school
Collimated light beam, reflection then produce the second detection light beam；When the second detection light beam is incident on the face A, third time generates two-beam, folding
Penetrating light is calibration beam, and reflected light retroeflection to the face B, the 4th generation two-beam, so circulation generate interference light.Such as Fig. 1 institute
Show, the working principle of Amici prism of the present invention: spectroscope is the face A towards incident beam, and projecting detection light beam is the face B, works as laser
The incident beam launched is incident on the light splitting face eyeglass A and generates two-beam: being reflected into calibration light, is refracted as detection light beam；Work as inspection
When surveying the light beam directive face B, two-beam is generated again, is refracted as detection light beam, reflection then produces detection light beam, when it is incident on
When the first inclined-plane a, because vertical with the first inclined-plane a, there is no reflected lights, directly injection calibration beam, avoid to do in this way
Relate to light；Therefore, the multiple reflections superposition interference that common parallel light splitting piece output beam is avoided by the design of Amici prism, from
And it effectively improves when causing optical wavelength to change because of temperature change, the stability of light source power detection.Further, the present invention is divided rib
Mirror is applied to the instrument test data newly developed as shown in figure 3, Fig. 4 is 24 hours detection data schematic diagrames of parallel spectroscope,
By comparing two figures: 24 hours Amici prism data variations are 3 numbers, and parallel light splitting piece then reaches more than 100 number.
The embodiment of the present invention only introduces its specific embodiment, does not limit the protection scope thereof.The skill of the industry
Art personnel can make certain modifications under the inspiration of the present embodiment, therefore all equivalence changes done according to the invention patent range
Or modification, it belongs in the invention patent scope of the claims.
Claims (3)
1. a kind of beam splitting prism attachment generated without interference reference light, it is characterised in that: the left side of the Amici prism is incidence
Face (A), right side are detection faces (B), wherein the first inclined-plane (a) is equipped between the upper side and detection faces (B) of Amici prism,
The second inclined-plane (b) is equipped between the downside of Amici prism and the plane of incidence (A)；Above-mentioned first inclined-plane (a) is upper with Amici prism
It is formed the first angle (D), is formed between the second inclined-plane (b) and the plane of incidence (A) the second angle (E) between side, incident beam warp
The plane of incidence (A) is injected in Amici prism, is injected detection faces (B) after the plane of incidence (A) refraction, is reflected and reflect through detection faces (B)
After be respectively formed calibration beam and detection light beam, calibration beam are vertically incident upon the second inclined-plane (b), and projected through the second inclined-plane (b).
2. a kind of beam splitting prism attachment generated without interference reference light according to claim 1, it is characterised in that: described
The angle of first angle (D) is 100-150 degree, and the angle of the second angle (E) is 120-160 degree.
3. a kind of beam splitting prism attachment generated without interference reference light according to claim 2, it is characterised in that: described
Amici prism is set to the laser beam emission port side of on-line continuous particle concentration detector, and the incidence of Amici prism
The beam emissions mouth of face (A) alignment laser；The lower part of Amici prism be equipped with reflective mirror, Amici prism project without interference correction
Light beam is injected in reflective mirror, and through mirror reflection to the lens of on-line continuous particle concentration detector, is entered through lens
In the photodetector of line continuous particulate object concentration detector, to be calibrated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758337.9A CN105891921B (en) | 2014-12-12 | 2014-12-12 | A kind of beam splitting prism attachment generated without interference reference light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410758337.9A CN105891921B (en) | 2014-12-12 | 2014-12-12 | A kind of beam splitting prism attachment generated without interference reference light |
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| Publication Number | Publication Date |
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| CN105891921A CN105891921A (en) | 2016-08-24 |
| CN105891921B true CN105891921B (en) | 2019-03-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6908556B2 (en) * | 2018-05-08 | 2021-07-28 | 京セラ株式会社 | Electromagnetic wave detection device and information acquisition system |
| CN110927962B (en) * | 2018-09-20 | 2021-02-09 | 上海微电子装备（集团）股份有限公司 | Prism design method, self-reference interferometer and design method and alignment system thereof |
| CN112636153B (en) * | 2020-12-04 | 2021-11-05 | 武汉安扬激光技术股份有限公司 | Ultraviolet femtosecond laser |
| CN114077143B (en) * | 2021-10-29 | 2024-04-30 | 歌尔光学科技有限公司 | Projection device, control method of projection device and projection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8400451A (en) * | 1984-02-10 | 1985-09-02 | Stichting Waterbouwkundig Lab | Optical device measuring particle concn. in liq. - has beam splitter providing reference beam for photodiode and measuring beam for optical fibre ending below liq. surface |
| CN2569131Y (en) * | 2002-09-28 | 2003-08-27 | 国家海洋技术中心 | Concentation measurer for sea algae and susponded matter |
| CN2606351Y (en) * | 2002-05-15 | 2004-03-10 | 朱彤 | Continuous smoke concentration determining laser emitter |
| CN103439232A (en) * | 2013-08-30 | 2013-12-11 | 合肥工业大学 | Obscuration type soot particle concentration measuring method and device thereof |
-
2014
- 2014-12-12 CN CN201410758337.9A patent/CN105891921B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8400451A (en) * | 1984-02-10 | 1985-09-02 | Stichting Waterbouwkundig Lab | Optical device measuring particle concn. in liq. - has beam splitter providing reference beam for photodiode and measuring beam for optical fibre ending below liq. surface |
| CN2606351Y (en) * | 2002-05-15 | 2004-03-10 | 朱彤 | Continuous smoke concentration determining laser emitter |
| CN2569131Y (en) * | 2002-09-28 | 2003-08-27 | 国家海洋技术中心 | Concentation measurer for sea algae and susponded matter |
| CN103439232A (en) * | 2013-08-30 | 2013-12-11 | 合肥工业大学 | Obscuration type soot particle concentration measuring method and device thereof |
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| CN105891921A (en) | 2016-08-24 |
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