CN205787406U - The reflective constant volume combustion bomb high-speed camera schlieren system of rectifiable aberration - Google Patents
The reflective constant volume combustion bomb high-speed camera schlieren system of rectifiable aberration Download PDFInfo
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- CN205787406U CN205787406U CN201620497499.6U CN201620497499U CN205787406U CN 205787406 U CN205787406 U CN 205787406U CN 201620497499 U CN201620497499 U CN 201620497499U CN 205787406 U CN205787406 U CN 205787406U
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Abstract
The utility model discloses the reflective constant volume combustion bomb high-speed camera schlieren system of a kind of rectifiable aberration, including the light source set gradually along light path, optical fiber, condenser lens group, slit arrangement, first reflecting mirror, collimating mirror, constant volume combustion bomb, schlieren mirror, second reflecting mirror, the edge of a knife and high-speed camera, the light input end of described optical fiber is connected with light source, the light output end of described optical fiber is connected with condenser lens group, the focus of described condenser lens group overlaps at slit arrangement with collimating mirror focus after the first reflecting mirror reflection, the described edge of a knife is positioned at schlieren mirror focal point after the second reflecting mirror reflection.This utility model uses condenser lens group to be improved existing condenser lens, has corrected polychromatic light at the aberration produced after lens such that it is able in obtaining constant volume combustion bomb more accurately, real ball flame propagates photo.
Description
Technical field
This utility model relates to reflective schlieren system, anti-in particular to a kind of rectifiable aberration
Penetrate formula constant volume combustion bomb high-speed camera schlieren system.
Background technology
Constant volume combustion bomb is that simulated engine inside cylinder piston is close to atdc combustion process
Experimental provision, when high-speed schlieren system utilizes fuel combustion, in constant volume combustion bomb, fluid density is different
Thus the light passed through is produced different refraction effects, the directional light passed through is through one end glass
Window reflects in constant volume combustion bomb and finally makes high-speed camera through other end glass window
Catch the process that the ball flame in constant volume combustion bomb is propagated.
Conventional reflective constant volume combustion bomb high-speed camera schlieren system use halogen tungsten lamp or
Xenon lamp is as light source, and power consumption is big, quantity of heat production is big, radiating treatment take pains light decay, make
The effect de-stabilising effect experimental precision of the light that must export, the high heat simultaneously produced the most easily makes
Condenser lens below deforms upon and affects experimental precision.Additionally, due to the light in laboratory
Source is all polychromatic light, optically focused in traditional reflective constant volume combustion bomb high-speed camera schlieren system
Mirror all uses the convex lens of sphere, polychromatic light through convex lens reflect after due to shades of colour
The refractive index of light is different thus can produce aberration phenomenon so that the outmost turns of light can be coloured
Aperture, needs when the laminar burning velocity of the ball flame studied in constant volume bullet to measure final throwing
Penetrate the radius of ball flame image in high-speed camera, if producing aberration phenomenon during refraction,
Last high-speed camera will be with constant volume by the ball flame radius that schlieren system photographs
The radius deviation of the ball flame of the true experiment in firebomb, thus the ball finally calculated
The parameter of shape propagating flame also can be with the parameter deviation of real spherical propagating flame.
Summary of the invention
The purpose of this utility model seeks to provide the reflective constant volume of a kind of rectifiable aberration to fire
Burning and play high-speed camera schlieren system, this reflective schlieren system is by the optically focused in traditional schlieren
Mirror is improved to be combined by two convex lenss and concavees lens by original single convex lens
Condenser lens group, this condenser lens group can correct polychromatic light when lens reflect produce color
Difference phenomenon such that it is able in obtaining constant volume combustion bomb more accurately, real ball flame is propagated and shone
Sheet.
For achieving the above object, the reflective constant volume of the rectifiable aberration designed by this utility model
Firebomb high-speed camera schlieren system, including the light source set gradually along light path, optical fiber, optically focused
Mirror group, slit arrangement, the first reflecting mirror, collimating mirror, constant volume combustion bomb, schlieren mirror, second
Reflecting mirror, the edge of a knife and high-speed camera, the light input end of described optical fiber is connected with light source, described
The light output end of optical fiber is connected with condenser lens group, and the focus of described condenser lens group is passed through with collimating mirror
Focus after first reflecting mirror reflection overlaps at slit arrangement, and slit is placed in condenser lens group
The overlapping position of focus and the collimating mirror focus after the first reflecting mirror reflection is to be more convenient for
Regulation project light in constant volume bullet number, be i.e. easy to regulate the size of light source, described cutter
Mouth be positioned at schlieren mirror through second reflecting mirror reflection after focal point, be arranged so as to be for the ease of
Regulation project light in high-speed camera number.
Further, described condenser lens group by the first convex lens set gradually along light path, first
Concavees lens and the second convex lens composition, described first convex lens, the first concavees lens, the second convex lens
Distance between mirror three is adjustable, is so adapted to not by the distance between three lens of regulation
Same light source, is conducive to having corrected polychromatic light at the aberration produced after lens such that it is able to
In obtaining constant volume combustion bomb more accurately, real ball flame propagates photo.
Further, described condenser lens group is arranged in condenser lens group lens barrel, described condenser lens group
Lens barrel includes the first convex lens lens barrel, the first concavees lens lens barrel and the second convex lens lens barrel；Described
One end inner ring of the first convex lens lens barrel is provided with for being fitted together to the first annular recessed of the first convex lens
Groove, described first concavees lens lens barrel is provided with the inner chamber for fixing the first concavees lens, institute vertically
One end inner ring stating the second convex lens lens barrel is provided with the second annular for being fitted together to the second convex lens
Groove；One end of described first concavees lens lens barrel has first annular recessed with the first convex lens lens barrel
One end of groove is threaded connection, the other end of described first concavees lens lens barrel and the second convex lens
Lens barrel has one end of the second annular groove and is threaded connection.So, each lens barrel passes through spiral shell
Stricture of vagina connects, and is corrected the aberration phenomenon of different situations by the degree of precession between lens barrel, it is to avoid
In regulation lens process, hands directly contacts minute surface and makes dirty minute surface, simultaneously between regulation minute surface
Distance can also be more stable.It is essential that in condenser lens group, when convex lens lens barrel revolves completely
When entering in concavees lens lens barrel, convex lens now and the distance of concavees lens are equal to 0.
Further, described first annular groove, the second annular groove and interior intracavity are equipped with ring
Shape spacing collar.So, desirably prevent lens by lens barrel scratching or crushing, and be easy to lens
Cleaning and replacing.
Yet further, described slit arrangement is aperture adjustable narrow annular channel device, so exists
Debugging schlieren system slit aperture in season is 0, can more accurately and more easily determine condenser lens group
Focus, experiment time can by regulation slit aperture size determine required light source
Size.
Further, described light source is LED-light source, consume energy low, be not easy heating, with
Using light transmission fiber between condenser lens group, optical fiber is flexible so that light source is convenient the most mobile,
Light source is kept apart with condenser lens group, it is to avoid the heat that light source sends makes the battery of lens to deform
Thus affect the effect of experiment.
Compared with prior art, this utility model has the advantage that
One, this utility model uses condenser lens group to be improved existing condenser lens, rectifys
Just polychromatic light is at the aberration produced after condenser lens lens such that it is able to obtain more accurately
In obtaining constant volume combustion bomb, real ball flame propagates the radius of spherical propagating flame in photo.
Its two, this utility model be mounted with between condenser lens group and first reflecting mirror one can
The slit arrangement of adjustment aperture size, so just can be easier to when debugging schlieren system, more accurate
The focal position of the true light after the refraction of determination condenser lens group, the most also can be by regulation
The size in aperture regulates the size of light source easily.
Its three, light source of the present utility model use power consumption low, be difficult to heating LED-light source,
And using light transmission fiber between condenser lens group, optical fiber is flexible so that light source is convenient arbitrarily to be moved
Dynamic, light source is kept apart with condenser lens group, it is to avoid the heat that light source sends makes condenser lens
Group deformation so that condenser lens group is corrected aberration ability and died down, thus affects the effect of experiment.
Accompanying drawing explanation
Fig. 1 is the reflective constant volume combustion bomb high-speed camera schlieren system of a kind of rectifiable aberration
Structural representation；
Fig. 2 is the structural representation of condenser lens group in Fig. 1；
Fig. 3 is the structural representation of condenser lens group lens barrel in Fig. 1；
Fig. 4 is the structural representation of slit arrangement in Fig. 1；
Wherein: light source 1, optical fiber 2, condenser lens group 3, slit arrangement the 4, first reflecting mirror 5,
Collimating mirror 6, constant volume combustion bomb 7, schlieren mirror the 8, second reflecting mirror 9, the edge of a knife 10, at a high speed
Video camera the 11, first convex lens the 12.1, second convex lens the 12.2, first concavees lens 13.1,
Condenser lens group lens barrel the 14, first convex lens lens barrel the 14.1, first concavees lens lens barrel 14.2,
Two convex lens lens barrels 14.3, first annular groove the 15.1, second annular groove 15.2, inner chamber
16, annular stop circle 17.
Detailed description of the invention
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The reflective constant volume combustion bomb high-speed camera schlieren system of the rectifiable aberration shown in figure,
Including the light source 1 set gradually along light path, optical fiber 2, condenser lens group 3, slit arrangement 4,
One reflecting mirror 5, collimating mirror 6, constant volume combustion bomb 7, schlieren mirror the 8, second reflecting mirror 9, cutter
Mouth 10 and high-speed camera 11；Light source 1 is LED-light source, the light input end of optical fiber 2 and light
Source 1 connects, and the light output end of optical fiber 2 is connected with condenser lens group 3, the focus of condenser lens group 3
Overlap at slit arrangement 4 with the collimating mirror 6 focus after the first reflecting mirror 5 reflection, this
Sample can regulate light source size by the pore size of regulation slit arrangement 4, also can be in debugging
During schlieren system, energy is more convenient, determine the focus of condenser lens group more accurately, and the edge of a knife 10 is positioned at
The schlieren mirror 8 focal point after the second reflecting mirror 9 reflection, so can be by the regulation edge of a knife
The aperture of 10 determines the size of the image finally projected in high-speed camera 11.
In technique scheme, condenser lens group 3 is by the first convex lens set gradually along light path
12.1, the first concavees lens 13.1 and the second convex lens 12.2 form, the first convex lens 12.1,
Distance between first concavees lens the 13.1, second convex lens 12.2 three is adjustable, so passes through
The distance regulating first convex lens the 12.1, first concavees lens 13.1 and the second convex lens 12.2 is come
Correct different light source to emit beam the aberration produced.
In technique scheme, condenser lens group 3 is arranged in condenser lens group lens barrel 14, optically focused
Mirror group lens barrel 14 includes first convex lens lens barrel the 14.1, first concavees lens lens barrel 14.2 and second
Convex lens lens barrel 14.3；One end inner ring of the first convex lens lens barrel 14.1 is provided with for being fitted together to
The first annular groove 15.1 of one convex lens 12.1, the first concavees lens lens barrel 14.2 sets vertically
There are the inner chamber 16 for fixing the first concavees lens 13.1, one end of the second convex lens lens barrel 14.3
Inner ring is provided with the second annular groove 15.2 for being fitted together to the second convex lens 12.2；First is recessed
One end of mirror lens barrel 14.2 and the first convex lens lens barrel 14.1 have first annular groove 15.1
One end is threaded connection, the other end of the first concavees lens lens barrel 14.2 and the second convex lens mirror
One end that cylinder 14.3 has the second annular groove 15.2 is threaded connection.Each lens are pacified
Being contained in the most corresponding lens barrel, each lens barrel is threaded connection, by revolving between lens barrel
The degree entered to be to correct the aberration phenomenon of different situations, it is to avoid in regulation lens process, hands is straight
Contact minute surface is made dirty minute surface, and the distance between regulation minute surface can also be more stable simultaneously.Important
, in condenser lens group, when convex lens lens barrel is fully screwed in concavees lens lens barrel, now
Convex lens and the distance of concavees lens equal to 0.
In technique scheme, first annular groove the 15.1, second annular groove 15.2 and interior
It is equipped with annular stop circle 17 in chamber 16, desirably prevents by annular stop circle 17 is fixing
Lens are scratched or crushed, and are easy to cleaning and the replacing of lens.
In technique scheme, slit arrangement 4 is aperture adjustable narrow annular channel device, determines
During the focus of condenser lens group 3, the aperture of slit arrangement 4 is adjusted to 0, when projecting slit dress
Put on 4 be a bright hot spot time, the position at slit arrangement 4 place is condenser lens group 3
Focal plane.
Work process of the present utility model: first, the light that light source 1 sends transmits through optical fiber 2
To condenser lens group 3, the distance between regulation each lens of condenser lens group 3 so that finally project
On slit arrangement 4, the outmost turns at light does not has coloured aperture, then the hole by slit arrangement 4
Footpath is adjusted to 0, regulation slit arrangement 4 and the distance of condenser lens group 3 so that at slit arrangement 4
Be a bright hot spot, now slit arrangement 4 place Jiao that face is condenser lens group 3 put down
Face, at slit arrangement 4 is point source；Then, point source is by the focal point of condenser lens group 3
After sending, after first reflecting mirror 5 reflection, project collimating mirror 6, through collimating mirror 6
Light after reflection forms the uniform directional light of colour mixture and projects in constant volume combustion bomb 7；Then, fixed
Holding tested district burning in firebomb 7, form ball flame, flow disturbance, refractive index becomes
Changing, directional light arrives schlieren mirror 8, the light after schlieren mirror 8 reflects through tested region
By the edge of a knife 10 after dihedral reflector 9 reflects, finally become on high-speed camera 11
Picture.
The above, detailed description of the invention the most of the present utility model, it is noted that any ripe
Know those skilled in the art in the technical scope disclosed by this utility model, can readily occur in
Change or replacement, all should contain within protection domain of the present utility model.
Claims (6)
1. a reflective constant volume combustion bomb high-speed camera schlieren system for rectifiable aberration, its
Be characterised by: the light source (1) that includes setting gradually along light path, optical fiber (2), condenser lens group (3),
Slit arrangement (4), the first reflecting mirror (5), collimating mirror (6), constant volume combustion bomb (7), stricture of vagina
Shadow mirror (8), the second reflecting mirror (9), the edge of a knife (10) and high-speed camera (11), described
The light input end of optical fiber (2) is connected with light source (1), the light output end of described optical fiber (2)
It is connected with condenser lens group (3), the focus of described condenser lens group (3) and collimating mirror (6) warp
Cross the focus after the first reflecting mirror (5) reflection to overlap at slit arrangement (4) place, the described edge of a knife
(10) the schlieren mirror (8) focal point after the second reflecting mirror (9) reflects it is positioned at.
The reflective constant volume combustion bomb of rectifiable aberration the most according to claim 1 is at a high speed
Shooting schlieren system, it is characterised in that: described condenser lens group (3) is set gradually by along light path
The first convex lens (12.1), the first concavees lens (13.1) and the second convex lens (12.2) group
Become, described first convex lens (12.1), the first concavees lens (13.1), the second convex lens (12.2)
Distance between three is adjustable.
The reflective constant volume combustion bomb of rectifiable aberration the most according to claim 2 is at a high speed
Shooting schlieren system, it is characterised in that: described condenser lens group (3) is arranged on condenser lens group mirror
Cylinder (14) in, described condenser lens group lens barrel (14) include the first convex lens lens barrel (14.1),
First concavees lens lens barrel (14.2) and the second convex lens lens barrel (14.3)；
One end inner ring of described first convex lens lens barrel (14.1) is provided with for being fitted together to the first convex lens
The first annular groove (15.1) of mirror (12.1), described first concavees lens lens barrel (14.2) edge
It is axially arranged with the inner chamber (16) for fixing the first concavees lens (13.1), described second convex lens
One end inner ring of mirror lens barrel (14.3) be provided with for be fitted together to the second convex lens (12.2) second
Annular groove (15.2)；
One end of described first concavees lens lens barrel (14.2) and the first convex lens lens barrel (14.1)
The one end with first annular groove (15.1) is threaded connection, described first concavees lens mirror
The other end and the second convex lens lens barrel (14.3) of cylinder (14.2) have the second annular groove (15.2)
One end be threaded connection.
The reflective constant volume combustion bomb of rectifiable aberration the most according to claim 3 is at a high speed
Shooting schlieren system, it is characterised in that: described first annular groove (15.1), the second annular
It is equipped with annular stop circle (17) in groove (15.2) and inner chamber (16).
5. according to the reflective constant volume of the rectifiable aberration according to any one of Claims 1 to 4
Firebomb high-speed camera schlieren system, it is characterised in that: described slit arrangement (4) is aperture
Adjustable narrow annular channel device.
6. according to the reflective constant volume of the rectifiable aberration according to any one of Claims 1 to 4
Firebomb high-speed camera schlieren system, it is characterised in that: described light source (1) is LED-light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497499.6U CN205787406U (en) | 2016-05-27 | 2016-05-27 | The reflective constant volume combustion bomb high-speed camera schlieren system of rectifiable aberration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497499.6U CN205787406U (en) | 2016-05-27 | 2016-05-27 | The reflective constant volume combustion bomb high-speed camera schlieren system of rectifiable aberration |
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| CN205787406U true CN205787406U (en) | 2016-12-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866970A (en) * | 2016-05-27 | 2016-08-17 | 武汉理工大学 | Reflective type high-speed camera shooting schlieren system applied to constant volume combustion bomb and capable of correcting chromatic aberration |
| CN108060972A (en) * | 2017-12-03 | 2018-05-22 | 天津大学 | A kind of optics fast compressor deflagrating jar of achievable schlieren method shooting |
-
2016
- 2016-05-27 CN CN201620497499.6U patent/CN205787406U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866970A (en) * | 2016-05-27 | 2016-08-17 | 武汉理工大学 | Reflective type high-speed camera shooting schlieren system applied to constant volume combustion bomb and capable of correcting chromatic aberration |
| CN108060972A (en) * | 2017-12-03 | 2018-05-22 | 天津大学 | A kind of optics fast compressor deflagrating jar of achievable schlieren method shooting |
| CN108060972B (en) * | 2017-12-03 | 2021-01-26 | 天津大学 | Optical rapid compressor combustion cylinder capable of realizing schlieren shooting |
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