CN110376133A - A kind of portable gas survey meter optical module - Google Patents
A kind of portable gas survey meter optical module Download PDFInfo
- Publication number
- CN110376133A CN110376133A CN201910682335.9A CN201910682335A CN110376133A CN 110376133 A CN110376133 A CN 110376133A CN 201910682335 A CN201910682335 A CN 201910682335A CN 110376133 A CN110376133 A CN 110376133A
- Authority
- CN
- China
- Prior art keywords
- optical
- incidence
- plane
- laser light
- light beam
- Prior art date
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 238
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims description 6
- 230000011514 reflex Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000003447 ipsilateral effect Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 229920002574 CR-39 Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 210000000746 body region Anatomy 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Abstract
The present invention is suitable for detection of gas technical field, provides a kind of portable gas survey meter optical module.First aspect of the embodiment of the present invention by provide it is a kind of including a detecting laser, first reflecting mirror, an optical filter and first optical detector portable gas survey meter optical module, or, a kind of portable gas survey meter optical module including a detecting laser, an optical filter, a N focus convergent lens or a N focus concave mirror and first optical detector is provided, both the gas of detectable distant location, gas at detectable short distance again, signal-to-noise ratio is high and structure is simple.
Description
Technical field
The invention belongs to detection of gas technical field more particularly to a kind of portable gas survey meter optical modules.
Background technique
Detection of gas technology is mainly used in coal, petrochemical industry, electric power, metallurgy, municipal works etc. and is possible to occur easily
The field fired the leakage of explosive and polluted gas, generate significant threat to people life property safety and health.Existing gas is visited
Long-range detection can be carried out to methane etc. danger or polluted gas by surveying instrument, but cannot meet measurable distant location simultaneously
It is simply required with gas, signal-to-noise ratio height and the structure at closely.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of portable gas survey meter optical module, it is existing to solve
Gas detecting instrument cannot meet gas, signal-to-noise ratio height and structure at measurable distant location and short distance simultaneously simply to be wanted
The problem of asking.
The first aspect of the embodiment of the present invention provides a kind of portable gas survey meter optical module, comprising:
One detecting laser is used for emission detection laser beam；
One the first reflecting mirror, for the exploring laser light beam to be reflexed under test gas region；
One optical filter, for filtering out the exploring laser light beam for being located at the reflection point of the under test gas region and being reflected back
Except stray light；
One the first optical detector, for receiving exploring laser light beam that the reflection point is reflected back and being detected；
Wherein, exit facet and under test gas institute of the reflecting surface of first reflecting mirror towards the detecting laser
In region, first reflecting mirror is set to the plane of incidence or exit facet of the optical filter, the plane of incidence direction of the optical filter
The reflection point.
In one embodiment, first reflecting mirror is set to the plane of incidence of the optical filter, first reflecting mirror
To be totally reflected prism；
Alternatively, first reflecting mirror is set to the exit facet of the optical filter, first reflecting mirror is total internal reflection
Prism.
In one embodiment, the portable gas survey meter optical module further include:
One indication laser, for emitting and the visible instruction laser beam of the exploring laser light Shu Pinghang；
Wherein, the exit facet of the indication laser is towards the under test gas region.
In one embodiment, first reflecting mirror is Transflective mirror, for emit the detecting laser
Exploring laser light beam is divided into two bundles；
The portable gas survey meter optical module further include:
One reference gas chamber, is sealed with calibrating gas；
One the second optical detector, for receiving the exploring laser light beam in the reference gas chamber internal transmission and being visited
It surveys；
Wherein, the reference gas chamber is set to the opposite side of the exit facet of the detecting laser, second optical detector
It is set to the side in the reference gas chamber far from the detecting laser, the exploring laser light beam is by the Transflective mirror point
A branch of to be transmitted to the under test gas region after two beams, another beam enters the reference gas chamber.
In one embodiment, the portable gas survey meter optical module further include:
One convergent lens, the exploring laser light beam for the reflection point to be reflected back converge to first optical detector
The plane of incidence；
Wherein, exit facet of the plane of incidence of first optical detector towards the optical filter, the convergent lens setting
Between the exit facet of the optical filter and the plane of incidence of first optical detector.
In one embodiment, the convergent lens is N focus convergent lens, for N number of reflection point to be reflected back
N beam exploring laser light beam converge to the plane of incidence of first optical detector；
Wherein, N number of reflection point is different from the distance between the N focus convergent lens, and N >=2 and N are integer.
In one embodiment, the portable gas survey meter optical module further include:
One concave mirror, the exploring laser light beam for the reflection point to be reflected back converge to first optical detection
The plane of incidence of device；
Wherein, first reflecting mirror is set to the plane of incidence of the optical filter, and first optical detector is set to institute
State the exit facet of optical filter, the plane of incidence of the reflecting surface of the concave mirror towards first optical detector.
In one embodiment, the concave mirror is N focus concave mirror, for N number of reflection point is anti-
The N beam exploring laser light beam being emitted back towards converges to the plane of incidence of first optical detector；
Wherein, N number of reflection point is different from the distance between the N focus concave mirror, and N >=2 and N are integer.
In one embodiment, the portable gas survey meter optical module further include:
One concave mirror, the exploring laser light beam being reflected back for assembling the reflection point；
One the second reflecting mirror, the exploring laser light beam for assembling the concave mirror reflex to first detection
The plane of incidence of device；
Wherein, second reflecting mirror be set to the optical filter exit facet and the concave mirror reflecting surface it
Between, the reflecting surface of second reflecting mirror towards the concave mirror reflecting surface and first optical detector incidence
Face.
The second aspect of the embodiment of the present invention provides a kind of portable gas survey meter optical module, comprising:
One detecting laser is used for emission detection laser beam；
One optical filter, the detection that N number of reflection point for filtering out positioned at the under test gas region is reflected back swash
Stray light except light beam；
One the first optical detector, for receiving exploring laser light beam that the reflection point is reflected back and being detected；
One N focus convergent lens or a N focus concave mirror, the N beam for N number of reflection point to be reflected back
Exploring laser light beam converges to the plane of incidence of first optical detector；
Wherein, the exit facet of the detecting laser is towards the under test gas region, the incidence of the optical filter
Facing towards the reflection point, between N number of reflection point and the N focus convergent lens or the N focus concave mirror
Distance is different；
Exit facet of the plane of incidence of first optical detector towards the optical filter, the N focus convergent lens setting
Between the exit facet of the optical filter and the plane of incidence of first optical detector；Alternatively, the first optical detector setting
In the exit facet of the optical filter, the plane of incidence of the reflecting surface of the N focus concave mirror towards first optical detector；
N >=2 and N are integer.
First aspect of the embodiment of the present invention includes a detecting laser, first reflecting mirror, one by providing a kind of
The portable gas survey meter optical module of a optical filter and first optical detector, by reflecting mirror by detecting laser
The exploring laser light beam of transmitting reflexes under test gas region, filters out the reflection point positioned at gas region by optical filter
Stray light except the exploring laser light beam being reflected back receives the exploring laser light beam that is reflected back of reflection point simultaneously by the first optical detector
It is detected, so that the exploring laser light beam of detecting laser transmitting and the exploring laser light beam that reflection point is reflected back are coaxial, can both be visited
The gas of distant location, and the gas at detectable short distance are surveyed, signal-to-noise ratio is high and structure is simple.
Second aspect of the embodiment of the present invention includes a detecting laser, an optical filter, a N coke by providing a kind of
The portable gas survey meter optics group of point convergent lens or a N focus concave mirror and first optical detector
Part is filtered out where gas by detecting laser emission detection laser beam under test gas region by optical filter
Region and the exploring laser light beam that is reflected back from N focus convergent lens or N focus concave mirror apart from different N number of reflection points
Except stray light, the exploring laser light beam that is reflected back of each reflection point of N is received by the first optical detector and is simultaneously detected, so that the
The gas of the detectable distant location of one optical detector, and the gas at detectable short distance, signal-to-noise ratio is high and structure is simple.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the first structural representation for the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 2 is second of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 3 is the third structural representation for the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 4 is the 4th kind of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 5 is the 5th kind of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 6 is the 6th kind of real structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 7 is the 7th kind of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 8 is the 8th kind of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Fig. 9 is the 9th kind of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Figure 10 is the tenth kind of structural representation of the portable gas survey meter optical module that the embodiment of the present invention one provides
Figure；
Figure 11 is that a kind of the tenth structure of the portable gas survey meter optical module that the embodiment of the present invention one provides is shown
It is intended to；
Figure 12 is the first structural representation of portable gas survey meter optical module provided by Embodiment 2 of the present invention
Figure；
Figure 13 is second of structural representation of portable gas survey meter optical module provided by Embodiment 2 of the present invention
Figure；
Figure 14 is the third structural representation of portable gas survey meter optical module provided by Embodiment 2 of the present invention
Figure.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention are explicitly described, it is clear that described embodiment is the present invention one
The embodiment divided, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, should fall within the scope of the present invention.
Description and claims of this specification and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
Embodiment one
As shown in Fig. 1~Figure 11, the present embodiment provides a kind of portable gas survey meter optical modules 100, including branch
Frame 101 and optical element group, optical element group are integrally disposed in bracket 101.
In the application, the concrete shape construction of bracket can be configured according to actual needs, can satisfy optics member
Part group, which steadily integrates, is fixed on integrated requirement.
It is U-shaped that bracket 101 is illustratively shown in Fig. 1~Figure 11.
As shown in Fig. 1~Figure 11, optical element group provided in this embodiment includes:
One detecting laser 1 is used for emission detection laser beam；
One the first reflecting mirror 2, for the exploring laser light beam to be reflexed under test gas region；
One optical filter 3, for filtering out the exploring laser light for being located at the reflection point of the under test gas region and being reflected back
Stray light except beam；
One the first optical detector 4, for receiving exploring laser light beam that the reflection point is reflected back and being detected；
Wherein, exit facet and the under test gas of the reflecting surface of first reflecting mirror 2 towards the detecting laser 1
Region, first reflecting mirror 2 are set to the plane of incidence or exit facet of the optical filter 3, the plane of incidence of the optical filter 3
Towards the reflection point.
In the application, the either side in two lateral walls of bracket, rack side wall and spy can be set in detecting laser
The corresponding position of exit facet of survey laser is made or is offered by translucent material can be by the through-hole of exploring laser light beam；It filters
Piece is set to the open end of bracket, the first optical detector can be set the bottom inside in bracket, open end and bottom inside it
Between or be embeddedly set to the bottom of bracket.Reflection point is the background object or any entity positioned under test gas region
Point on object.
In the application, the first reflecting mirror can be plane mirror, total reflection prism, total internal reflection prism, may be used also
To be the plane for having light beam splitting function, prismatic or cubic type Transflective mirror (beam splitter).
The lateral wall that detecting laser 1 is set to bracket 101 is illustratively shown, which offers in Fig. 1
Through-hole, the first reflecting mirror 2 are the plane of incidence for being totally reflected prism and being set to optical filter 3, and optical filter 3 is set to bracket 101
Open end, the first optical detector 4 are embeddedly set to the bottom of bracket 101.
The lateral wall that detecting laser 1 is set to bracket 101 is illustratively shown, which offers in Fig. 2
Through-hole, the first reflecting mirror 2 are total internal reflection prism and the exit facet for being set to optical filter 3, and optical filter 3 is set to bracket 101
Open end, the first optical detector 4 is embeddedly set to the bottom of bracket 101.
In one embodiment, the portable gas survey meter optical module further include:
One collimation lens, be set to the detecting laser exit facet and first reflecting mirror reflecting surface it
Between.
In the application, collimation lens is for expanding and collimating to the exploring laser light Shu Jinhang that detecting laser emits.Collimation
Lens can be set between rack side wall and the exit facet of detecting laser, and the through-hole opened up in rack side wall also can be set
In.
Fig. 3 illustratively shows the through-hole that collimation lens 5 is set to detecting laser 1 and bracket 101 on the basis of Fig. 1
Between.
In one embodiment, the portable gas survey meter optical module further include:
One indication laser, for emitting and the visible instruction laser beam of the exploring laser light Shu Pinghang；
Wherein, the exit facet of the indication laser is towards the under test gas region.
In the application, indication laser is used to emit monochrome or combination face in the colors such as red, orange, yellow, green, cyan, blue, purple
The visible instruction laser beam of color is under test gas region, for carrying out laser designation.
In one embodiment, the instruction laser beam and the exploring laser light beam be parallel to each other and distance be 10mm~
20mm。
In the application, indication laser is set to the opposite side or ipsilateral of the exit facet of detecting laser, indication laser and
The instruction laser beam that it emits will not interfere exploring laser light beam not in the transmitting and receiving light path of exploring laser light beam,
It will not influence the receiving efficiency of exploring laser light beam.Instruction laser beam deviates exploring laser light beam on the transmit path, but therebetween
Deviation distance it is smaller, can serve to indicate that the transmitting of exploring laser light beam to the position under test gas region, when detection range compared with
When remote, deviation distance between the two be can be ignored.
Fig. 4 illustratively shows another lateral wall that indication laser 6 is set to bracket 101 on the basis of Fig. 3, i.e.,
Indication laser 6 is set to the opposite side of the exit facet of detecting laser 1.
In one embodiment, first reflecting mirror is Transflective mirror, for emit the detecting laser
Exploring laser light beam is divided into two bundles；
The portable gas survey meter optical module further include:
One reference gas chamber, is sealed with calibrating gas；
One the second optical detector, for receiving the exploring laser light beam in the reference gas chamber internal transmission and being visited
It surveys；
Wherein, the reference gas chamber is set to the opposite side of the exit facet of the detecting laser, second optical detector
It is set to the side in the reference gas chamber far from the detecting laser, the exploring laser light beam is by the Transflective mirror point
A branch of to be transmitted to the under test gas region after two beams, another beam enters the reference gas chamber.
In the application, reference gas chamber is sealed gas chamber, is inside sealed with reference gas identical under test gas type, ginseng
It examines gas chamber to be made close to the side of detecting laser of translucent material, translucent material can be glass, polymethyl methacrylate
(PMMA), polystyrene (PS), polycarbonate (PC) and poly bis allyl diglycol carbonates (CR-39) etc..Second optical detection
The side inside reference gas chamber far from detecting laser can be set in device, and it is separate can also to be embeddedly set to reference gas chamber
The side of detecting laser.
It is cubic type Transflective mirror that Fig. 5 illustratively shows the first reflecting mirror 2 on the basis of Fig. 3, and the second light is visited
It surveys device 8 and is embeddedly set to side of the reference gas chamber 7 far from detecting laser 1.
In one embodiment, the portable gas survey meter optical module, further includes:
One convergent lens, the exploring laser light beam for the reflection point to be reflected back converge to first optical detector
The plane of incidence；
Wherein, exit facet of the plane of incidence of first optical detector towards the optical filter, the convergent lens setting
Between the exit facet of the optical filter and the plane of incidence of first optical detector.
In the application, convergent lens can be the combination of convex lens or the multiple lens for having convergence of rays, as long as can
Meet the requirement that the exploring laser light beam that reflection point is reflected back is converged to the first optical detector.
Fig. 6 illustratively shows the exit facet for being set to optical filter 3 and the first optical detector 4 on the basis of Fig. 2
Convergent lens 9 between the plane of incidence, the convergent lens 9 are convex lens.
In the application, due to the converging action of convergent lens, so that the plane of incidence of the first optical detector is not relative to using
It can be greatly reduced when convergent lens, so as to reduce the volume of the first optical detector, and then reduce entire portable gas
The volume of survey meter optical module.
In one embodiment, the convergent lens is N focus convergent lens, for N number of reflection point to be reflected back
N beam exploring laser light beam converge to the plane of incidence of first optical detector；
Wherein, N number of reflection point is different from the distance between the N focus convergent lens, and N >=2 and N are integer.
Traditional single focal lense, can only be to anti-within the scope of certain distance after fixed lens are at a distance from optical detector
Exit point is imaged, and defocus is serious after the reflection point imaging at other distances, and the collection efficiency of exploring laser light beam weakens significantly, to make
Detectivity seriously reduces.
It in the application, can be by under test gas region by using the convergent lens including more than one focus
The exploring laser light beam of more than one reflection point position reflection converges to the plane of incidence of the first optical detector, so that the first optical detector
The under test gas of more than one reflection point position can be detected, between these reflection points and N focus convergent lens away from
From difference.The integer that the numerical value of N can be set according to actual needs to be arbitrarily greater than or equal to 2, can be at a distance and nearby
Reflection point imaging, or to distant place, moderate distance, nearby etc. many places reflection point is imaged so that after N focus convergence lens focus,
Far, the exploring laser light Shu Douneng for reflecting point reflection in, interior on a large scale at short distance is by the first optical detector with higher collection
Efficiency is collected.
Fig. 7 illustratively shown on the basis of Fig. 6 convergent lens 9 be bifocal convergent lens, can by two with
The exploring laser light beam of the different reflection point reflection of distance converges to the first optical detector between convergent lens 9.
In one embodiment, the portable gas survey meter optical module further include:
One concave mirror, the exploring laser light beam for the reflection point to be reflected back converge to first optical detection
The plane of incidence of device；
Wherein, first reflecting mirror is set to the plane of incidence of the optical filter, and first optical detector is set to institute
State the exit facet of optical filter, the plane of incidence of the reflecting surface of the concave mirror towards first optical detector.
In the application, when portable gas survey meter optical module includes concave mirror, the first reflecting mirror is set to
The plane of incidence of optical filter, so that the exit facet in optical filter can be set in the first optical detector, concave mirror is arranged in bracket
Bottom inside or be embeddedly set to the bottom of bracket, to maximally reduce portable gas survey meter optics group
The volume of part.The exit facet in optical filter also can be set in first reflecting mirror, at this point, the first optical detector needs to be arranged first
Between reflecting mirror and concave mirror.
Fig. 8 illustratively shows the exit facet that the first optical detector 4 is set to optical filter 3, concave surface on the basis of Fig. 1
Reflecting mirror 10 is set to the bottom inside of bracket 101.
In one embodiment, the portable gas survey meter optical module further include:
One convergent lens converges to the incidence of first optical detector for further assembling the concave mirror
The exploring laser light beam in face；
Wherein, the convergent lens is set to the reflection of the plane of incidence and the concave mirror of first optical detector
Between face.
In the application, a convergent lens can be added between concave mirror and the first optical detector, visited with enhancing
Survey the convergence of laser beam.
In one embodiment, the concave mirror is N focus concave mirror, for N number of reflection point is anti-
The N beam exploring laser light beam being emitted back towards converges to the plane of incidence of first optical detector；
Wherein, N number of reflection point is different from the distance between the N focus concave mirror, and N >=2 and N are integer.
It in the application, can be by under test gas region by using the concave mirror including more than one focus
The exploring laser light beam of more than one reflection point position reflection converge to the plane of incidence of the first optical detector so that the first optical detection
Device can detect the under test gas at more than one far and near distance different location.The numerical value of N can be according to actual needs
It is set as arbitrarily being greater than or equal to 2 integer, it can be to being imaged at a distance with reflection point nearby, or to distant place, moderate distance, closely
The imaging of many places reflection points such as place so that after the convergence of N focus concave mirror, it is remote, in, closely locate a wide range of interior reflection point
The exploring laser light Shu Douneng of reflection is collected by the first optical detector with higher collection efficiency.
It is bifocal concave mirror that Fig. 9 illustratively shows concave mirror 10 on the basis of Fig. 8, can be by two
The exploring laser light beam of the different reflection point reflection of a distance between concave mirror 10 converges to the first optical detector 4.
In one embodiment, the portable gas survey meter optical module further include:
One concave mirror, the exploring laser light beam being reflected back for assembling the reflection point；
One the second reflecting mirror, the exploring laser light beam for assembling the concave mirror reflex to first detection
The plane of incidence of device；
Wherein, second reflecting mirror be set to the optical filter exit facet and the concave mirror reflecting surface it
Between, the reflecting surface of second reflecting mirror towards the concave mirror reflecting surface and first optical detector incidence
Face.
In the application, when portable gas survey meter optical module includes concave mirror and the second reflecting mirror, first
Reflecting mirror is set to the plane of incidence or exit facet of optical filter, and the second reflecting mirror is set to the exit facet of optical filter or going out for optical filter
It penetrates between face and the reflecting surface of concave mirror, the first optical detector is arranged on the inside of the side of bracket, on the outside of side or is embedded in
It is set to side face likes, the first optical detector can be located at the ipsilateral or opposite side of the exit facet of detecting laser, and concave surface is anti-
It penetrates mirror the bottom inside of bracket is arranged in or is embeddedly set to the bottom of bracket, to maximally reduce portable gas
The volume of survey meter optical module.
In the application, the second reflecting mirror can be plane mirror, total reflection prism or total internal reflection prism.
Figure 10 illustratively shows the plane of incidence that the first reflecting mirror 2 is set to optical filter 3, and the second reflecting mirror 11 is set to
The exit facet of optical filter 3, the first optical detector 4 are arranged in another outside portion of bracket 101 and are located at going out for detecting laser 1
The opposite side in face is penetrated, concave mirror 10 is set to the bottom inside of bracket 101.
In one embodiment, the portable gas survey meter optical module further include:
One convergent lens converges to the reflecting surface of second reflecting mirror for further assembling the concave mirror
Exploring laser light beam；
Wherein, the convergent lens is set to the reflecting surface of second reflecting mirror and the reflecting surface of the concave mirror
Between.
In the application, a convergent lens can be added, between concave mirror and the second reflecting mirror to enhance detection
The convergence of laser beam.
In one embodiment, the concave mirror is N focus concave mirror, for N number of reflection point is anti-
The N beam exploring laser light beam being emitted back towards converges to the reflecting surface of second reflecting mirror；
Wherein, N number of reflection point is different from the distance between the N focus concave mirror, and N >=2 and N are integer.
It in the application, can be by under test gas region by using the concave mirror including more than one focus
The exploring laser light beam of more than one reflection point position reflection converge to the reflecting surface of the second reflecting mirror, and pass through the second reflecting mirror
The plane of incidence for reflexing to the first optical detector, allow the first optical detector to more than one far and near distance different location at
Under test gas is detected.The integer that the numerical value of N can be set according to actual needs to be arbitrarily greater than or equal to 2, can be to remote
Place and reflection point imaging nearby, or to distant place, moderate distance, the imaging of many places reflection point such as nearby, so that anti-through N focus concave surface
Penetrate after mirror assembles, it is remote, in, closely locate the exploring laser light Shu Douneng for reflecting point reflection in a wide range of by the first optical detector with
Higher collection efficiency is collected.
It is bifocal concave mirror that Figure 11 illustratively shows concave mirror 10 on the basis of Figure 10, can be incited somebody to action
The exploring laser light beam for the reflection point reflection that distance is different between two and concave mirror 10 converges to the second reflecting mirror 11.
The present embodiment includes a detecting laser, first reflecting mirror, an optical filter and one by providing a kind of
The portable gas survey meter optical module of a first optical detector is swashed the detection that detecting laser emits by reflecting mirror
Light beam reflexes under test gas region, filters out the detection that the reflection point positioned at gas region is reflected back by optical filter
Stray light except laser beam, the exploring laser light beam being reflected back by the first optical detector reception reflection point are simultaneously detected, are made
Detecting laser transmitting exploring laser light beam and the exploring laser light beam that is reflected back of reflection point it is coaxial, both detectable distant locations
Gas, and the gas at detectable short distance, signal-to-noise ratio is high and structure is simple.
Embodiment two
As shown in Figure 12~Figure 14, the present embodiment provides a kind of portable gas survey meter optical modules 100, including branch
Frame 101 and optical element group, optical element group are integrally disposed in bracket 101.
In the application, the concrete shape construction of bracket can be configured according to actual needs, can satisfy optics member
Part group, which steadily integrates, is fixed on integrated requirement.
It is U-shaped that bracket 101 is illustratively shown in Figure 12~Figure 14.
As shown in Figure 12 Figure 14, optical element group provided in this embodiment includes:
One detecting laser 1 is used for emission detection laser beam；
One optical filter 3, the detection that N number of reflection point for filtering out positioned at the under test gas region is reflected back swash
Stray light except light beam；
One the first optical detector 4, for receiving exploring laser light beam that the reflection point is reflected back and being detected；
One N focus convergent lens 9 or a N focus concave mirror 10, for be reflected back N number of reflection point
N beam exploring laser light beam converges to the plane of incidence of first optical detector 4；
Wherein, the exit facet of the detecting laser 1 enters towards the under test gas region, the optical filter 3
Penetrate facing towards the reflection point, N number of reflection point and the N focus convergent lens 9 or the N focus concave mirror 10 it
Between distance it is different；
Towards the exit facet of the optical filter 3, the N focus convergent lens 9 sets the plane of incidence of first optical detector 4
It is placed between the exit facet of the optical filter 3 and the plane of incidence of first optical detector 4；Alternatively, first optical detector 4
It is set to the exit facet of the optical filter 3, the reflecting surface of the N focus concave mirror 10 is towards first optical detector 4
The plane of incidence；
N >=2 and N are integer.
In the application, the either side in two lateral walls of bracket, rack side wall and spy can be set in detecting laser
The corresponding position of exit facet of survey laser is made or is offered by translucent material can be by the through-hole of exploring laser light beam；It filters
Piece is set to the open end of bracket, the first optical detector can be set the bottom inside in bracket, open end and bottom inside it
Between or be embeddedly set to the bottom of bracket.Reflection point is the background object or any entity positioned under test gas region
Point on object.
It in the application, can be by gas to be measured by using convergent lens or concave mirror including more than one focus
The exploring laser light beam of more than one reflection point position reflection of body region converges to the plane of incidence of the first optical detector, so that
First optical detector can detect the under test gas of more than one reflection point position, these reflection points and N focus are assembled
The distance between lens or N focus concave mirror difference.The numerical value of N can be set according to actual needs arbitrarily to be greater than or wait
In 2 integer, reflection point at a distance and nearby can be imaged, or to distant place, moderate distance, nearby etc. many places reflection point at
Picture so that after N focus assembles lens focus, it is remote, in, closely locate the exploring laser light beam for reflecting point reflection in a wide range of all
It can be collected by the first optical detector with higher collection efficiency.
The lateral wall that detecting laser 1 is set to bracket 101 is illustratively shown in Figure 12, detecting laser 1
Exit facet is towards under test gas region, and optical filter 3 is set to the open end of bracket 101, and the first optical detector 4 is embeddedly
It is set to the bottom of bracket 101, towards the exit facet of optical filter 3, N focus convergent lens 9 is for the plane of incidence of the first optical detector 4
Bifocal convergent lens and be set between the exit facet of optical filter 3 and the plane of incidence of the first optical detector 4, can by two with
The exploring laser light beam of the different reflection point reflection of distance converges to the first optical detector 4 between N focus convergent lens 9.
The lateral wall that detecting laser 1 is set to bracket 101 is illustratively shown in Figure 13, detecting laser 1
For exit facet towards under test gas region, optical filter 3 is set to the open end of bracket 101, and the first optical detector 4 is set to filter
The exit facet of mating plate 3, N focus concave mirror 10 are bifocal concave mirror and the bottom inside for being set to bracket 101, energy
The exploring laser light beam of enough reflection point reflections that distance between two and N focus concave mirror 10 is different converges to the first light and visits
Survey device 4.
In one embodiment, the portable gas survey meter optical module further include:
One indication laser, for emitting visible instruction laser beam；
Wherein, the exit facet of the indication laser is towards the under test gas region.
In the application, indication laser is used to emit monochrome or combination face in the colors such as red, orange, yellow, green, cyan, blue, purple
The visible instruction laser beam of color is under test gas region, for carrying out laser designation.
In one embodiment, the instruction laser beam and the exploring laser light beam be parallel to each other and distance be 10mm~
20mm。
In the application, indication laser is set to the opposite side or ipsilateral of detecting laser, indication laser and its transmitting
Indicate that laser beam not in the transmitting and receiving light path of exploring laser light beam, will not interfere exploring laser light beam, will not influence
The receiving efficiency of exploring laser light beam.Instruction laser beam deviates exploring laser light beam on the transmit path, but deviation between the two away from
From smaller, can serve to indicate that the transmitting of exploring laser light beam to the position under test gas region, when detection range farther out when, the two
Between deviation distance can be ignored.
Figure 14 illustratively shows another lateral wall that indication laser 6 is set to bracket 101 on the basis of Figure 12
And it is set to the opposite side of detecting laser 1.
The present embodiment by provide it is a kind of include a detecting laser, an optical filter, a N focus convergent lens or
The portable gas survey meter optical module of one N focus concave mirror and first optical detector, passes through detection
Laser emission detection laser beam is filtered out positioned at gas region and with by optical filter under test gas region
Stray light of one optical detector except the exploring laser light beam that different N number of reflection points is reflected back, passes through the first optical detector
It receives the exploring laser light beam that each reflection point of N is reflected back and is detected, so that the gas of the detectable distant location of the first optical detector
Body, and the gas at detectable short distance, signal-to-noise ratio is high and structure is simple.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of portable gas survey meter optical module characterized by comprising
One detecting laser is used for emission detection laser beam；
One the first reflecting mirror, for the exploring laser light beam to be reflexed under test gas region；
One optical filter is located at except the exploring laser light beam that is reflected back of reflection point of the under test gas region for filtering out
Stray light；
One the first optical detector, for receiving exploring laser light beam that the reflection point is reflected back and being detected；
Wherein, exit facet and the under test gas location of the reflecting surface of first reflecting mirror towards the detecting laser
Domain, first reflecting mirror are set to the plane of incidence or exit facet of the optical filter, and the plane of incidence of the optical filter is described in
Reflection point.
2. portable gas survey meter optical module as described in claim 1, which is characterized in that first reflecting mirror is set
It is placed in the plane of incidence of the optical filter, first reflecting mirror is total reflection prism；
Alternatively, first reflecting mirror is set to the exit facet of the optical filter, first reflecting mirror is total internal reflection trigone
Mirror.
3. portable gas survey meter optical module as described in claim 1, which is characterized in that further include:
One indication laser, for emitting and the visible instruction laser beam of the exploring laser light Shu Pinghang；
Wherein, the exit facet of the indication laser is towards the under test gas region.
4. portable gas survey meter optical module as described in claim 1, which is characterized in that first reflecting mirror is
Transflective mirror, the exploring laser light beam for emitting the detecting laser are divided into two bundles；
The portable gas survey meter optical module further include:
One reference gas chamber, is sealed with calibrating gas；
One the second optical detector, for receiving the exploring laser light beam in the reference gas chamber internal transmission and being detected；
Wherein, the reference gas chamber is set to the opposite side of the exit facet of the detecting laser, the second optical detector setting
Far from the side of the detecting laser in the reference gas chamber, the exploring laser light beam is divided into two by the Transflective mirror
Shu Hou, a branch of to be transmitted to the under test gas region, another beam enters the reference gas chamber.
5. such as the described in any item portable gas survey meter optical modules of Claims 1 to 4, which is characterized in that further include:
One convergent lens, the exploring laser light beam for the reflection point to be reflected back converge to entering for first optical detector
Penetrate face；
Wherein, for the plane of incidence of first optical detector towards the exit facet of the optical filter, the convergent lens is set to institute
It states between the exit facet of optical filter and the plane of incidence of first optical detector.
6. portable gas survey meter optical module as claimed in claim 5, which is characterized in that the convergent lens is N
Focus convergent lens, the N beam exploring laser light beam for N number of reflection point to be reflected back converge to first optical detector
The plane of incidence；
Wherein, N number of reflection point is different from the distance between the N focus convergent lens, and N >=2 and N are integer.
7. such as the described in any item portable gas survey meter optical modules of Claims 1 to 4, which is characterized in that further include:
One concave mirror, the exploring laser light beam for the reflection point to be reflected back converge to first optical detector
The plane of incidence；
Wherein, first reflecting mirror is set to the plane of incidence of the optical filter, and first optical detector is set to the filter
The exit facet of mating plate, the plane of incidence of the reflecting surface of the concave mirror towards first optical detector.
8. portable gas survey meter optical module as claimed in claim 7, which is characterized in that the concave mirror is
N focus concave mirror, the N beam exploring laser light beam for N number of reflection point to be reflected back converge to first optical detection
The plane of incidence of device；
Wherein, N number of reflection point is different from the distance between the N focus concave mirror, and N >=2 and N are integer.
9. such as the described in any item portable gas survey meter optical modules of Claims 1 to 4, which is characterized in that further include:
One concave mirror, the exploring laser light beam being reflected back for assembling the reflection point；
One the second reflecting mirror, the exploring laser light beam for assembling the concave mirror reflex to first detector
The plane of incidence；
Wherein, second reflecting mirror is set between the exit facet of the optical filter and the reflecting surface of the concave mirror,
The reflecting surface of second reflecting mirror is towards the reflecting surface of the concave mirror and the plane of incidence of first optical detector.
10. a kind of portable gas survey meter optical module characterized by comprising
One detecting laser is used for emission detection laser beam；
One optical filter, for filtering out the exploring laser light beam for being located at N number of reflection point of the under test gas region and being reflected back
Except stray light；
One the first optical detector, for receiving exploring laser light beam that the reflection point is reflected back and being detected；
One N focus convergent lens or a N focus concave mirror, the N beam detection for N number of reflection point to be reflected back
Laser beam converges to the plane of incidence of first optical detector；
Wherein, the exit facet of the detecting laser is towards the under test gas region, the plane of incidence court of the optical filter
To the reflection point, N number of reflection point and the distance between the N focus convergent lens or the N focus concave mirror
It is different；
For the plane of incidence of first optical detector towards the exit facet of the optical filter, the N focus convergent lens is set to institute
It states between the exit facet of optical filter and the plane of incidence of first optical detector；Alternatively, first optical detector is set to institute
State the exit facet of optical filter, the plane of incidence of the reflecting surface of the N focus concave mirror towards first optical detector；
N >=2 and N are integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910682335.9A CN110376133A (en) | 2019-07-26 | 2019-07-26 | A kind of portable gas survey meter optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910682335.9A CN110376133A (en) | 2019-07-26 | 2019-07-26 | A kind of portable gas survey meter optical module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110376133A true CN110376133A (en) | 2019-10-25 |
Family
ID=68256339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910682335.9A Pending CN110376133A (en) | 2019-07-26 | 2019-07-26 | A kind of portable gas survey meter optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110376133A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786798A (en) * | 1987-06-18 | 1988-11-22 | Spectra-Physics Inc. | Beam forming and collection lens assembly for laser scanner system |
| CN104614362A (en) * | 2015-01-22 | 2015-05-13 | 华中科技大学 | Free space gas Raman scattering collecting device |
| CN207717617U (en) * | 2018-01-25 | 2018-08-10 | 中科华仪科技(深圳)有限公司 | A kind of bandgap wavelength locking distant reading type laser methane light-receiving regulating device |
| CN110031867A (en) * | 2019-05-09 | 2019-07-19 | 合肥光博量子科技有限公司 | A kind of portable aerosol boundary layer infrared acquisition laser radar |
| CN210604357U (en) * | 2019-07-26 | 2020-05-22 | 徐州旭海光电科技有限公司 | Optical assembly for portable gas detector |
-
2019
- 2019-07-26 CN CN201910682335.9A patent/CN110376133A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786798A (en) * | 1987-06-18 | 1988-11-22 | Spectra-Physics Inc. | Beam forming and collection lens assembly for laser scanner system |
| CN104614362A (en) * | 2015-01-22 | 2015-05-13 | 华中科技大学 | Free space gas Raman scattering collecting device |
| CN207717617U (en) * | 2018-01-25 | 2018-08-10 | 中科华仪科技(深圳)有限公司 | A kind of bandgap wavelength locking distant reading type laser methane light-receiving regulating device |
| CN110031867A (en) * | 2019-05-09 | 2019-07-19 | 合肥光博量子科技有限公司 | A kind of portable aerosol boundary layer infrared acquisition laser radar |
| CN210604357U (en) * | 2019-07-26 | 2020-05-22 | 徐州旭海光电科技有限公司 | Optical assembly for portable gas detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2402735B1 (en) | Enhanced cavity for a photoacoustic gas sensor | |
| CN111239093A (en) | Planar miniature multi-channel fluorescence detection optical system | |
| CN108931504B (en) | Annular multipoint reflection type photoelectric body sensor probe | |
| CN100443867C (en) | Optical analysis system | |
| CN102519908B (en) | Imaging optical microfluid sensing device and method thereof | |
| CN109661594A (en) | Intermediate range optical system for remote sensing receiver | |
| CN110146430A (en) | A kind of flow cytometer optical system | |
| CN111751948B (en) | Pressure self-balancing type optical lens packaging structure of deep sea instrument | |
| CN104220863A (en) | Gas detector system | |
| CA2028148C (en) | Optical probe for fluid light transmission properties | |
| CN101251480A (en) | Gas sensor | |
| EP1784630B1 (en) | Frequency-multiplexed detection of multiple wavelength light for flow cytometry | |
| CN109154663A (en) | For directly detecting the multicomponent Fabry-Perot etalon interferometer of laser radar | |
| CN106680186A (en) | Multi-type scattered light detection system of flow cytometer | |
| CN109540807A (en) | Spectrometer and micro-total analysis system | |
| CN106092968A (en) | Optical detection apparatus and method | |
| CN110376133A (en) | A kind of portable gas survey meter optical module | |
| JP6336544B2 (en) | Liquid concentration detector | |
| WO2019015947A1 (en) | A hand-held microfluidic detection device | |
| US20220113254A1 (en) | An apparatus and method for detecting photoluminescent light emitted from a sample | |
| CN116008157B (en) | Optical path device and flow cytometer | |
| CN210604357U (en) | Optical assembly for portable gas detector | |
| CN205538639U (en) | Gas analysis appearance air chamber device | |
| CN110763305B (en) | Photoelectric liquid level measuring method | |
| CN105393106B (en) | Device for measuring scattering of a sample |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 221000 No. 99 Xu Hai Road, Xuzhou economic and Technological Development Zone, Xuzhou, Jiangsu Applicant after: Jiangsu Xuhai Photoelectric Technology Co.,Ltd. Address before: 221000 room 208, Clean Technology Industrial Park Service Center, Xuzhou Economic and Technological Development Zone, Jiangsu Province Applicant before: XUZHOU XUHAI OPTO-ELECTRONIC TECHNOLOGIES Co.,Ltd. |