CN205333954U - A cassegrain mirror head for fixing a point measure flame free radical fluorescence intensity - Google Patents
A cassegrain mirror head for fixing a point measure flame free radical fluorescence intensity Download PDFInfo
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- CN205333954U CN205333954U CN201620009513.3U CN201620009513U CN205333954U CN 205333954 U CN205333954 U CN 205333954U CN 201620009513 U CN201620009513 U CN 201620009513U CN 205333954 U CN205333954 U CN 205333954U
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- mirror
- primary mirror
- cassegrain
- fluorescence intensity
- secondary mirror
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Abstract
The utility model relates to a burning diagnostic equipment, especially a cassegrain mirror head for fixing a point measure flame free radical fluorescence intensity. The cassegrain mirror head is including primary mirror, secondary mirror and lens cone, the primary mirror is used for reflecting the incident beam, and the center of primary mirror opens that to have through -hole, plane of reflection be the concave surface, the secondary mirror carries out secondary reflection to the light beam of primary mirror reflection, and the light beam after the reflection is worn out from the through -hole, the plane of reflection of secondary mirror is the convex surface, the lens cone is used for fixed primary mirror and secondary mirror, and the lens cone front end is equipped with the diaphragm, the rear end that are used for control to advance the light quantity and is equipped with optic fibre connection port, and primary mirror and secondary mirror are coaxial, and the secondary mirror is located the primary mirror and by between the fire detecting flame, the concave surface of primary mirror is relative with the convex surface of secondary mirror.
Description
Technical field
This utility model relates to combustion diagnosis equipment, especially a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity。
Background technology
Fuel combustion is phenomenon common in power-equipment, combustion position carries out deep research and contributes to grasping combustion characteristics, thus improving combustion technology, improving efficiency of combustion, reducing the discharge of pollutant。The flame parameters information such as flame temperature, flame reaction region, free radical radical concentration, rate of heat release can be reflected to a certain extent, so the research for flame radical fluorescence intensity is significant due to flame radical fluorescence intensity。Flame radical fluorescence intensity carries out further investigation needs good measurement means as instrument, therefore, flame radical fluorescence intensity acquisition methods is explored and will assist in the understanding promoted flame structure, combustion characteristics。
At present both at home and abroad about the measuring method of flame radical fluorescence intensity, it is concentrated mainly on equipment such as utilizing planar laser-induced fluorescence (PLIF), ICCD camera, obtain the Two dimensional Distribution picture of flame radical fluorescence intensity, and the measuring method for " fixed point " acquisition flame radical fluorescence intensity is still had vacant position。Current domestic minimum collecting the optical signalling that diameter is the CH group in 3mm spheroid, 3mm spheroid is not sufficiently small in some cases。
Utility model content
In order to solve the deficiency of the one-point measurement technology of existing flame radical fluorescence intensity, this utility model is for the improvement measuring system front end light collection device, it is provided that a kind of for pinpointing the Cassegrain's camera lens catching flame light。
A kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity in this utility model, including primary mirror, secondary mirror and lens barrel；Described primary mirror is for reflecting incident beam, and the center of primary mirror has through hole, reflecting surface is concave surface；The light beam that primary mirror is reflected by described secondary mirror carries out secondary reflection, and the light beam after reflection passes from through hole；The reflecting surface of secondary mirror is convex surface, described lens barrel is used for fixing primary mirror and secondary mirror, and it is coaxial that lens barrel front end is provided with for controlling the diaphragm of light-inletting quantity, rear end is provided with optical fiber joint end mouth, primary mirror and secondary mirror, secondary mirror is between primary mirror and tested flame, and the concave surface of primary mirror is relative with the convex surface of secondary mirror。This utility model can make the tested region of surveyed object less, reduces the restriction to flame size size of the tested region。
As preferably, primary mirror radius of curvature is r, and through-hole diameter is 0.12r ~ 0.14r, and secondary curvature radius is the distance of 0.5r ~ 0.6r, primary mirror and secondary mirror is 0.45r ~ 0.55r, and the logical light diameter of diaphragm is 0.25r ~ 0.3r。It is the key factor affecting the tested Domain Volume size of flame that diaphragm leads to the distance between radius of curvature and two mirrors of the size of light diameter, primary and secondary mirror, this utility model machined go out its radius of curvature of primary and secondary mirror and the logical light diameter of diaphragm need to reach thousand points of precision。
As preferably, the reflecting surface of described primary mirror and secondary mirror being coated with ultraviolet strengthening membrane。The ultraviolet band light to visible light wave range can be reflected。As preferably, ultraviolet strengthening membrane is coated with the protective layer that can pass through Uv and visible light。
As preferably, the radius of curvature r of described primary mirror is 300mm ~ 305mm。
As preferably, described secondary mirror securing member is provided with adjustment screw。This adjustment screw of over-rotation, the distance between fine-tuning primary mirror and secondary mirror, easy to use, strong adaptability。
As preferably, described Cassegrain's lens barrel inwall is provided with the reflective circumferential rib for reducing lens barrel inwall。The spacing of circumferential rib is d, rib height 0.8d, rib thickness 0.2d。The spacing d of circumferential rib controls between 8mm ~ 13mm。Improve the image quality of optical system。
The beneficial effects of the utility model: 1, Cassegrain's camera lens can realize gathering diameter is 0.1mm, and height is the flame light in 0.8mm ~ 1.58mm cylindrical region, substantially reduces the volume in tested region；2, Cassegrain's camera lens primary and secondary mirror all adopts reflective coquille, and eyeglass is easily processed, and optical system no color differnece can be suitable for the measurement of each wave band light；3, Cassegrain mirror head-tail optical fiber joint end mouth, it may be achieved left and right, front and back, upper and lower six orientation adjustment, it is ensured that optical fiber can be successfully received light beam；4, the lens barrel inwall of Cassegrain's camera lens is provided with circumferential rib, can reduce the reflection light of inwall, improves the image quality of optical system。
Accompanying drawing explanation
Fig. 1 is Cassegrain's lens construction schematic diagram。
Fig. 2 is the measurement system structure schematic diagram of a kind of flame radical fluorescence intensity。
Labelling in figure: 1, tested flame, 2, diaphragm, 3, Cassegrain's camera lens, 4, optical fiber, 5, collimating mirror, 6, optical filter, 7, black box, 8, pin, 9, sensing form, 10, photomultiplier tube probe unit, 11, high voltage power supply, 12, data acquisition unit, 13, regulate screw, 14, secondary mirror, 15, circumferential rib, 16, primary mirror, 17, lens barrel, 18, regulate parts, 19, optical fiber joint end mouth。
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail, but this should not being interpreted as, the scope of above-mentioned theme of the present utility model is only limitted to above-described embodiment。
As it is shown in figure 1, a kind of Cassegrain's camera lens 3 is made up of primary mirror 16, secondary mirror 14 and lens barrel 17。Primary mirror 16 is the concave spherical mirror of r for radius of curvature。Secondary mirror is radius of curvature is the convex spherical reflecting mirror of 0.5r ~ 0.6r。Primary mirror 16 and secondary mirror 14 are coaxial, and the concave spherical surface of primary mirror 16 is relative with the convex spherical of secondary mirror 14。Two mirror distances are 0.45r ~ 0.55r, the securing member of fixing secondary mirror 14 have one to regulate screw 13, by the distance between the fine-tuning primary mirror 16 of turning adjusting screw 13 and secondary mirror 14。Diaphragm 2 is positioned at the front end of lens barrel 17, distance secondary mirror 14 reflecting surface center 0.106r, is used for controlling light-inletting quantity。The afterbody of lens barrel 17, has adjustment parts 18 and optical fiber joint end mouth 19。Regulate parts 18 and can realize the adjustment in left and right, front and back, upper and lower six orientation so that the optical fiber 4 being connected to optical fiber joint end mouth 19 place can be successfully received the light beam converged at herein。Lens imaging point distance primary mirror 16 reflecting surface central point 1.233r。The inwall of lens barrel 17 is provided with a number of circumferential rib 15, for reducing the interference of inwall reflection light, improves the image quality of optical system。Intercostal distance is d, rib height 0.8d, rib thickness 0.2d。Rib spacing d controls between 8mm ~ 13mm。
As in figure 2 it is shown, the measurement system of a kind of flame radical fluorescence intensity, including tested flame 1, Cassegrain's camera lens 3, optical fiber 4, collimating mirror 5, optical filter 6, black box 7, photomultiplier tube probe unit 10, high voltage power supply 11 and data acquisition unit 12。In the measurement system of described flame radical fluorescence intensity, employ above-mentioned Cassegrain's camera lens 3。Cassegrain's camera lens 3 front end arranges diaphragm 2, is used for controlling light-inletting quantity。The incidence end of optical fiber 4 is connected with the optical fiber joint end mouth 19 of Cassegrain's camera lens 3 afterbody。The exit end of optical fiber 4 is connected with collimating mirror 5。The bayonet socket of optical filter 6 and collimating mirror 5 is arranged on a side wall surface of black box 7。Photomultiplier tube probe unit 10 is positioned at black box 7, for eliminating the interference of background light。Optical filter 6 is between collimating mirror 5 and photomultiplier tube probe unit 10。The sensing form 9 of photomultiplier tube 10 is towards optical filter 6 side, with optical filter 6 place plane parallel。Photomultiplier tube 10 is positioned at for connecting input power and the pin 8 exporting signal the outside of black box 7, facilitates the connection of circuit。Respective lines in pin 8 is connected with high voltage power supply 11, makes high voltage power supply 11 power to photomultiplier tube probe unit 10。Respective lines in pin 8 is connected with data acquisition unit 12, the data acquisition unit 12 signal of telecommunication for showing with process photomultiplier tube 10 output。
The light that flame 1 sends is injected from diaphragm 2, enters Cassegrain's camera lens 3。Light first reflects through primary mirror 16, arrives secondary mirror 14, and light beam is focused on and passes the perforate of primary mirror 16 center by secondary mirror 14 again, is imaged on afterbody optical fiber joint end mouth 19 place of Cassegrain's camera lens 3。The opening diameter of primary mirror 16 requires more than focusing on the light beam diameter at this plane place。Focus on the angle requirement of light beam less than the angle of divergence of optical fiber 4, to guarantee that the light utilizing Cassegrain's camera lens 3 to gather can fully enter optical fiber 4, make light from the trailer transmission of Cassegrain's camera lens 3 to the exit end of optical fiber 4 through optical fiber 4。Can by the angular dispersed of its angle of divergence from the light beam of optical fiber 4 injection, it has not been convenient to the sensing form 9 of photomultiplier tube 10 receives。Collimating mirror 5 is connected to the exit end of optical fiber 4, and the divergent beams penetrated from optical fiber 4 can be converted to diameter collimated light beam within 4mm ~ 6mm by collimating mirror 5, and wherein the numerical aperture of optical fiber 4 matches with the numerical aperture of collimating mirror 5。Collimating mirror 5 bayonet socket is arranged on black box 7 wall, and optical filter 6 bayonet socket is arranged in black box 7 wall。From collimating mirror 5, the collimated light beam of injection is through optical filter 6, and filtered 6 is filtered。Wave band according to optical filter 6 self, is the light of a certain free radical of flame 1 from the light of optical filter 6 injection。The collimated light beam of filtered 6 injection is radiated on the sensing form 9 of photomultiplier tube 10。The light intensity signal received is converted to the signal of telecommunication a certain circuit output in pin 8 by photomultiplier tube 10, and the circuit passing through to connect is by this signal of telecommunication transmission to data acquisition unit 12。Data acquisition unit 12 is for processing and the signal of telecommunication showing that photomultiplier tube 10 exports。High voltage power supply 11 provides high-tension electricity by being connected with a certain circuit on pin 8 to photomultiplier tube 10。
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model。
Claims (7)
1. for Cassegrain's camera lens of one-point measurement flame radical fluorescence intensity, including primary mirror, secondary mirror and lens barrel；Described primary mirror is for reflecting incident beam, it is characterised in that the center of primary mirror has through hole, reflecting surface is concave surface；The light beam that primary mirror is reflected by described secondary mirror carries out secondary reflection, and the light beam after reflection passes from through hole；The reflecting surface of secondary mirror is convex surface, described lens barrel is used for fixing primary mirror and secondary mirror, and it is coaxial that lens barrel front end is provided with for controlling the diaphragm of light-inletting quantity, rear end is provided with optical fiber joint end mouth, primary mirror and secondary mirror, secondary mirror is between primary mirror and tested flame, and the concave surface of primary mirror is relative with the convex surface of secondary mirror。
2. a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity according to claim 1, it is characterized in that, primary mirror radius of curvature is r, through-hole diameter is 0.12r ~ 0.14r, secondary curvature radius is 0.5r ~ 0.6r, the distance of primary mirror and secondary mirror is 0.45r ~ 0.55r, and the logical light diameter of diaphragm is 0.25r ~ 0.3r。
3. a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity according to claim 1, it is characterised in that the radius of curvature r of described primary mirror is 300mm ~ 305mm。
4. a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity according to claim 1, it is characterised in that be positioned at the adjustment screw on secondary mirror securing member, it is possible to the spacing of fine setting primary mirror and secondary mirror。
5. a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity according to claim 1, it is characterised in that described Cassegrain's lens barrel inwall is provided with the reflective circumferential rib for reducing lens barrel inwall。
6. a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity according to claim 5, it is characterised in that the spacing of circumferential rib is d, rib height 0.8d, rib thickness 0.2d。
7. a kind of Cassegrain's camera lens for one-point measurement flame radical fluorescence intensity according to claim 5 or 6, it is characterised in that the spacing d of circumferential rib controls between 8mm ~ 13mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620009513.3U CN205333954U (en) | 2016-01-07 | 2016-01-07 | A cassegrain mirror head for fixing a point measure flame free radical fluorescence intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620009513.3U CN205333954U (en) | 2016-01-07 | 2016-01-07 | A cassegrain mirror head for fixing a point measure flame free radical fluorescence intensity |
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| Publication Number | Publication Date |
|---|---|
| CN205333954U true CN205333954U (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620009513.3U Expired - Fee Related CN205333954U (en) | 2016-01-07 | 2016-01-07 | A cassegrain mirror head for fixing a point measure flame free radical fluorescence intensity |
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| CN (1) | CN205333954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255777A (en) * | 2020-11-06 | 2021-01-22 | 中国航空工业集团公司洛阳电光设备研究所 | High-precision card type telescopic system |
| CN114323666A (en) * | 2021-12-31 | 2022-04-12 | 南京航空航天大学 | Ultraviolet light conduction device for detecting heat release rate of combustion chamber of aircraft engine |
-
2016
- 2016-01-07 CN CN201620009513.3U patent/CN205333954U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255777A (en) * | 2020-11-06 | 2021-01-22 | 中国航空工业集团公司洛阳电光设备研究所 | High-precision card type telescopic system |
| CN114323666A (en) * | 2021-12-31 | 2022-04-12 | 南京航空航天大学 | Ultraviolet light conduction device for detecting heat release rate of combustion chamber of aircraft engine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 Termination date: 20200107 |