CN203082799U - Optical fiber illumination system and optical fiber illumination spotlight device - Google Patents
Optical fiber illumination system and optical fiber illumination spotlight device Download PDFInfo
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- CN203082799U CN203082799U CN 201320093672 CN201320093672U CN203082799U CN 203082799 U CN203082799 U CN 203082799U CN 201320093672 CN201320093672 CN 201320093672 CN 201320093672 U CN201320093672 U CN 201320093672U CN 203082799 U CN203082799 U CN 203082799U
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- mirror
- condensing unit
- beam condensing
- fibre bundle
- optical fiber
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Abstract
The utility model relates to an optical fiber illumination system and an optical fiber illumination spotlight device. The optical fiber illumination spotlight device is connected with an optical fiber bundle and comprises a main mirror and an auxiliary mirror, wherein the main mirror is a rotary parabolic mirror, the auxiliary mirror is a rotary double-curved-surface mirror, and the radius a1 of the main mirror and the radius a2 of the auxiliary mirror respectively satisfy two relational expressions as follows: n=a2/a1, and A (e)=pai(a12-a22), wherein n is an obscuration ratio of the main mirror to the auxiliary mirror, A(e) is the sunlight effective projection area of the spotlight device, T is the highest temperature born by the optical fiber bundle, r is a product of the reflection index of the main mirror and the reflection index of the auxiliary mirror, I is the sunlight radiation intensity, and Af is the area of an optical fiber bundle heat absorption focal plane. According to the technical scheme provided by the utility model, the sizes of the main mirror and the auxiliary mirror of the spotlight device based on a Cassegrain structure are more reasonable, and the popularization and application of the optical fiber illumination can be facilitated.
Description
Technical field
The utility model relates to the optical fibre illumination technology, particularly relates to the beam condensing unit of a kind of optical fiber illuminating system and optical fibre illumination.
Background technology
Optical fibre illumination is meant that the place that utilizes the low optical fiber of loss that sunshine is not carried out any type of conversion and directly be transferred to daytime and also need to throw light on throws light on.Optical fibre illumination is a new technology that makes full use of solar energy, also is a kind of new mode of human illumination.Because optical fibre illumination has environmental protection, and can effectively save non-renewable fossil energy, therefore, optical fibre illumination has good application prospects.
Optical fiber illuminating system mainly comprises: autotracker and beam condensing unit.Autotracker is mainly used in the orientation of sun-tracing, makes the orientation of beam condensing unit towards the sun, thus sunshine can vertical irradiation to the daylighting face of beam condensing unit; Beam condensing unit is mainly used in the sunshine that converges certain area, to strengthen the light intensity of illumination.
The beam condensing unit of existing optical fibre illumination adopts combination parabolic concentrator, refraction type light gathering mirror usually or focuses on Fresnel condenser etc.; The optical efficiency of these beam condensing units is lower, and effectively optically focused is lower than also, thereby can cause illuminating effect relatively poor; In addition, the structure of the above-mentioned beam condensing unit that has is heavy, also can cause the load of autotracker overweight, thereby can not accurately track the orientation of the sun.
Beam condensing unit based on Cassegrain's structure mainly comprises: two speculums, and wherein one is rotating paraboloidal mirror, i.e. primary mirror, another piece are the hyperbolic mirror of rotation, i.e. secondary mirror.Beam condensing unit based on Cassegrain's structure has not only effectively overcome the problem that above-mentioned beam condensing unit exists, and, because its used material price and processing and fabricating cost are all lower, therefore, can also reduce the realization cost of optical fiber illuminating system effectively, have good practical value and application prospect.
The inventor finds in realizing the utility model process, for beam condensing unit based on Cassegrain's structure, the appropriate design of primary mirror and secondary mirror size is very important, for example, if the size design of primary mirror is excessive, then the temperature at the focus place of primary mirror can be very high, fibre bundle melted, thereby make the optical fiber illuminating system cisco unity malfunction.
Because the appropriate design demand of the size of the primary mirror of existing beam condensing unit based on Cassegrain's structure and secondary mirror, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of the optical fiber illuminating system of founding a kind of new structure and the beam condensing unit of optical fibre illumination, it is more reasonable to make based on the size design of the primary mirror of the beam condensing unit of Cassegrain's structure and secondary mirror, makes it have more practicality.Through continuous research and design, and, create the utility model that has practical value finally through studying sample and improvement repeatedly.
The utility model content
Main purpose of the present utility model is, satisfy the appropriate design demand of the size of the primary mirror of existing beam condensing unit based on Cassegrain's structure and secondary mirror, and provide the beam condensing unit of a kind of optical fiber illuminating system and optical fibre illumination, technical problem to be solved comprises, it is more reasonable to make based on the size design of the primary mirror of the beam condensing unit of Cassegrain's structure and secondary mirror.
The purpose of this utility model and solve its technical problem and can adopt following technical scheme to realize.
According to the beam condensing unit of a kind of optical fibre illumination that the utility model proposes, comprising: primary mirror and secondary mirror, described primary mirror are rotating paraboloidal mirror, and described secondary mirror is the hyperbolic mirror of rotation, it is characterized in that:
The radius a of described primary mirror
1Radius a with described secondary mirror
2Satisfy following two relational expressions respectively:
Wherein, described n is the ratio of obstruction of described primary mirror and secondary mirror, described A
eBe the effective projected area of the sunshine of described beam condensing unit, and described A
eSatisfy
Described T is the patient maximum temperature of described fibre bundle, and described r is the product of the reflectivity of the reflectivity of described primary mirror and described secondary mirror, and described I is a solar radiation intensity, described A
fBe described fibre bundle heat absorption focal plane area.
Preferable, the beam condensing unit of aforesaid optical fibre illumination, wherein said primary mirror and secondary mirror are coated with the aluminium film respectively.
Preferable, the beam condensing unit of aforesaid optical fibre illumination, the radius a of wherein said primary mirror and secondary mirror
1And a
2Be respectively the integer value after being corrected.
Preferable, the beam condensing unit of aforesaid optical fibre illumination, in the following cases, the radius a of described primary mirror
1Be 20cm, the radius a of described secondary mirror
2Be 4cm; Described situation comprises:
When the cross section radius of A, described fibre bundle is 2cm, described fibre bundle heat absorption focal plane area A
fBe 12.56cm
2
B, described r are 0.7921;
C, described I are 690 kilocalories/meter
2The time;
The ratio of obstruction n of D, described primary mirror and secondary mirror is 0.2;
E, when described fibre bundle is the silica fibre bundle, described T is 773.15 Kelvins.
Preferable, the beam condensing unit of aforesaid optical fibre illumination, the parabolical parameter mode of wherein said primary mirror is y
2=-2px, the hyp parametric equation of described secondary mirror is
Wherein, described p is the distance that parabolic focus arrives its directrix, and described a is half of the absolute value of the difference of distance arbitrarily a bit and between two focus on the hyperbola, and described b is that imaginary semi-axis is long.
Preferable, the beam condensing unit of aforesaid optical fibre illumination, wherein the aspect ratio at described primary mirror is 0.25, and is under the situation of the origin of coordinates with described parabolical summit, described parabolical parameter mode is y
2=-400x, described hyp parametric equation is
The present invention also provides a kind of optical fiber illuminating system, and described system comprises: the beam condensing unit of fibre bundle, autotracker and above-mentioned optical fibre illumination, and described fibre bundle is connected with described beam condensing unit, and described autotracker is connected with described beam condensing unit.
Preferable, aforesaid optical fiber illuminating system, wherein said fibre bundle are the silica fibre bundle.
By technique scheme, the beam condensing unit of optical fiber illuminating system of the present utility model and optical fibre illumination has following advantage and beneficial effect at least: beam condensing unit of the present utility model is based on the beam condensing unit of Cassegrain's structure, the utility model carries out appropriate design by primary mirror and the radius of secondary mirror and relevant parametric equation to this beam condensing unit, make the physical dimension of primary mirror and secondary mirror more scientific and reasonable, effective optically focused of further having given prominence to beam condensing unit is than high, compact overall structure, little and the realization low cost and other advantages of the load of the drive motors of autotracker; Thereby the utility model helps applying of optical fibre illumination.
In sum, the utility model has obvious improvement technically, and has significantly positive technique effect, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present utility model can be become apparent, below especially exemplified by preferred embodiment, and the cooperation Figure of description, be described in detail as follows.
Description of drawings
Fig. 1 is the schematic diagram of the beam condensing unit of optical fibre illumination of the present utility model.
The specific embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked, below in conjunction with accompanying drawing and preferred embodiment, to the specific embodiment, structure, feature and effect thereof according to the beam condensing unit of the optical fiber illuminating system that the utility model proposes and optical fibre illumination, describe in detail as after.
The beam condensing unit of embodiment one, optical fibre illumination.This device as shown in Figure 1.
In Fig. 1, the beam condensing unit of optical fibre illumination mainly comprises: two speculums, wherein a speculum is rotating paraboloidal mirror 1 (also can be called rotational paraboloid mirror one time), it is primary mirror, another piece speculum is the hyperbolic mirror 2 (also can be called secondary hyperboloid of revolution speculum) of rotation, i.e. secondary mirror.Can all be coated with the film such as the aluminium film that strengthen its reflecting properties on this primary mirror and the secondary mirror.
The utility model mainly is that the radius to the primary mirror of beam condensing unit and secondary mirror defines, and the parabola parametric equation of primary mirror and the hyperbola parametric equation of secondary mirror are defined, with the physical dimension (being concrete shape and size etc.) of clear and definite primary mirror and secondary mirror.The radius of primary mirror and secondary mirror and above-mentioned parameter equation to define process specific as follows.
(1), the temperature experience computing formula of paraboloid of revolution concentrator focal plane.
Only considering that radiation loss, absorptivity equal emissivity and absorption and emission and all obey under the situation of the Lambert cosine law, place, the concentrator focal plane actual temperature of rotating paraboloidal mirror can be calculated according to following formula (1) and obtain:
In above-mentioned formula (1), r is the product of the reflectivity of the reflectivity of primary mirror of beam condensing unit and secondary mirror; I is a solar radiation intensity; A
eBe the effective projected area of the sunshine of beam condensing unit; A
fFibre bundle 3 heat absorption focal plane areas for beam condensing unit.
Above-mentioned formula (1) is an experience computing formula; the temperature value that the concentrator focal plane of adopting this experience computing formula to calculate acquisition is located is basic identical with the actual temperature value at the place, focal plane that obtains by apparatus measures; the deviation of Cun Zaiing is usually between 2.4-4% between the two, and calculates the temperature value that obtains by above-mentioned formula (1) and can be higher than the temperature value that actual measurement obtains usually.
If, then can utilize above-mentioned formula (1) to calculate A with the concrete value of 3 patient maximum temperatures of fibre bundle as T
e
(2) calculating of the radius of the primary mirror of beam condensing unit and secondary mirror.
In the process of calculating the beam condensing unit physical dimension, the radius of the primary mirror of definition beam condensing unit is a
1, the radius of the secondary mirror of beam condensing unit is a
2For beam condensing unit, owing to it is driven and the orientation of the real-time tracing sun by autotracker, and gather the strongest direct sunlight, so effective projected area A of beam condensing unit
eComputing formula be:
A
e=π (a
1 2-a
2 2) formula (2)
For beam condensing unit based on Cassegrain's structure, because autotracker can make beam condensing unit track the orientation of the sun in real time, and guarantee that sunshine all is vertically to shine on the daylighting face of beam condensing unit, therefore, secondary mirror can some blocks to the collection area of primary mirror, and promptly beam condensing unit has the ratio of obstruction of secondary mirror to primary mirror.This ratio of obstruction is generally the radius of secondary mirror and the radius ratio numerically of primary mirror, shown in following formula (3).
The ratio of obstruction is to characterize the important parameter of beam condensing unit to sunshine aggregate capabilities size.With regard to beam condensing unit, if the ratio of obstruction is excessive, effective collection area of beam condensing unit can reduce and cause the sunshine that can not converge enough intensities of illumination to carry out optical fibre illumination, on the contrary, if the ratio of obstruction is too small, then the size of secondary mirror can be very little, thereby cause the processing and manufacturing difficulty increasing of secondary mirror and the accuracy of secondary mirror to can not get guaranteeing.
The ratio of obstruction can rule of thumb be determined a concrete numerical value.
If with the above-mentioned A that utilizes formula (1) to calculate
eThe above-mentioned formula of concrete numerical value substitution (2) of the ratio of obstruction of rule of thumb determining and formula (3) then can calculate a
1And a
2Concrete numerical value.
Calculate a
1And a
2A concrete example be, if used biography light fibre bundle 3 is the silica fibre bundle in the optical fiber illuminating system, then during these fibre bundle 3 operate as normal the maximum temperature that can bear for a long time be 773.15 Kelvins, i.e. T=773.15; Because primary mirror and secondary mirror need reflect and converge sunshine, so primary mirror and secondary mirror be coated with the layer of aluminum film respectively, and this aluminium film to the reflectivity of the sunshine of 400-1600nm wave band all more than 89%, thereby r=0.7921; Because beam condensing unit is with sunshine reflection and converges on the cross section of fibre bundle 3 to carry out coupled transfer, therefore, the cross-sectional area of fibre bundle 3 is fibre bundle 3 heat absorption focal plane areas just, like this, if the radius of the cross section of fibre bundle 3 is 2cm, then fibre bundle 3 heat absorption focal plane areas are 12.56cm
2, i.e. A
f=0.001256m
2For I, its value can be 690 kilocalories/meter
2The time, i.e. I=690 kilocalorie/rice
2The time; With above-mentioned T, r, I and A
fConcrete numerical value be brought in the above-mentioned formula (1), can calculate A
e=0.111483m
2Because when the beam condensing unit of making based on Cassegrain's structure, the common value of the ratio of obstruction is just can satisfy various designing requirements well at 0.2 o'clock, therefore, and with the ratio of obstruction n=0.2 and A
e=0.111483m
2Be brought in above-mentioned formula (2) and the formula (3), can calculate a
1=19.23cm and a
2=3.846cm; The a that aforementioned calculation can be gone out is installed for the ease of follow-up debugging
1And a
2Be modified to integer value, i.e. a
1=20cm and a
2=4cm.
(3), the hyperbola parametric equation of the parabola parametric equation of the primary mirror of beam condensing unit and secondary mirror.
It is bus that the primary mirror of beam condensing unit can be regarded as with opening parabola left, is the rotating paraboloidal mirror that main axis rotation obtains with the x axle; It is bus that the secondary mirror of beam condensing unit can be regarded as with a rotation hyperbola, is the hyperbolic mirror that main axis rotation is attained the Way with the x axle.
The parabola parametric equation of primary mirror and the hyperbola parametric equation of secondary mirror are respectively:
y
2=-2px formula (4)
Wherein, p is the distance that parabolic focus arrives its directrix, and a is half of the absolute value of the difference of distance arbitrarily a bit and between two focus on the hyperbola, and b is that hyp imaginary semi-axis is long.
The aspect ratio of the primary mirror of beam condensing unit is the gross thickness of parabolic concentrator of primary mirror and the ratio of primary mirror diameter.In actual design process, if aspect ratio is excessive, then the structure of beam condensing unit is comparatively heavy, and on the contrary, if aspect ratio is too small, then the processing and manufacturing difficulty of beam condensing unit and accuracy can be very high; Therefore, in the utility model, the value of the aspect ratio of primary mirror can be 0.25.
If with parabolical summit as the origin of coordinates, set up plane right-angle coordinate, utilize aspect ratio 0.25 can calculate point (100,200) be on the parabola a bit, bringing this point into parabolical parametric equation is in the formula (4), can obtain parabolical parametric equation and be:
y
2＝-400x
The focal coordinates of this parabolic equation are (100,0), because hyp left focus overlaps with this parabolic focus, and hyp right focus is to be positioned at origin of coordinates place, so can get:
2c=100, c
2=a
2+ b
2Formula (6)
In addition, by analyzing as can be known, point (100,40) be on the Hyperbolic Equation a bit, should put and formula (6) to be brought into hyp parametric equation be in the formula (5), can solve Hyperbolic Equation to be:
Embodiment two, optical fiber illuminating system.
This system mainly comprises: the beam condensing unit of fibre bundle, autotracker and optical fibre illumination.Fibre bundle is connected with beam condensing unit, and autotracker is connected with beam condensing unit.
Fibre bundle is mainly used in sunshine is sent under the place that also needs daytime to throw light on (as mine or sewage well or indoor etc., this sewage well comprises underground drain outlet).This fibre bundle can be specially the silica fibre bundle.
Autotracker is mainly used in the orientation of sun-tracing, and drives beam condensing unit towards the orientation of the sun, so that sunshine can vertically shine on the daylighting face of beam condensing unit.
Beam condensing unit is mainly used in the gathering sunshine, and the sunshine of assembling is transferred to fibre bundle, to realize the optical fibre illumination based on sunshine.Description among the concrete structure of beam condensing unit such as the above-mentioned embodiment one is in this no longer repeat specification.
The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit technology of the present utility model, any those skilled in the art are not in breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. the beam condensing unit of an optical fibre illumination, described beam condensing unit is connected with fibre bundle, and described beam condensing unit comprises: primary mirror and secondary mirror, described primary mirror are rotating paraboloidal mirror, described secondary mirror is the hyperbolic mirror of rotation, it is characterized in that:
The radius a of described primary mirror
1Radius a with described secondary mirror
2Satisfy following two relational expressions respectively:
Wherein, described n is the ratio of obstruction of described primary mirror and secondary mirror, described A
eBe the effective projected area of the sunshine of described beam condensing unit, and described A
eSatisfy
Described T is the patient maximum temperature of described fibre bundle, and described r is the product of the reflectivity of the reflectivity of described primary mirror and described secondary mirror, and described I is a solar radiation intensity, described A
fBe described fibre bundle heat absorption focal plane area.
2. beam condensing unit as claimed in claim 1 is characterized in that described primary mirror and secondary mirror are coated with the aluminium film respectively.
3. beam condensing unit as claimed in claim 1 or 2 is characterized in that, the radius a of described primary mirror and secondary mirror
1And a
2Be respectively the integer value after being corrected.
4. beam condensing unit as claimed in claim 3 is characterized in that, in the following cases, and the radius a of described primary mirror
1Be 20cm, the radius a of described secondary mirror
2Be 4cm; Described situation comprises:
When the cross section radius of A, described fibre bundle is 2cm, described fibre bundle heat absorption focal plane area A
fBe 12.56cm
2
B, described r are 0.7921;
C, described I are 690 kilocalories/meter
2The time;
The ratio of obstruction n of D, described primary mirror and secondary mirror is 0.2;
E, when described fibre bundle is the silica fibre bundle, described T is 773.15 Kelvins.
5. beam condensing unit as claimed in claim 1 or 2 is characterized in that, the parabolical parameter mode of described primary mirror is y
2=-2px, the hyp parametric equation of described secondary mirror is
Wherein, described p is the distance that parabolic focus arrives its directrix, and described a is half of the absolute value of the difference of distance arbitrarily a bit and between two focus on the hyperbola, and described b is that hyp imaginary semi-axis is long.
6. beam condensing unit as claimed in claim 5 is characterized in that, is 0.25 in the aspect ratio of described primary mirror, and is under the situation of the origin of coordinates with described parabolical summit, and described parabolical parameter mode is y
2=-400x, described hyp parametric equation is
7. optical fiber illuminating system, it is characterized in that, described system comprises: the beam condensing unit of fibre bundle, autotracker and the described optical fibre illumination of above-mentioned arbitrary claim, and described fibre bundle is connected with described beam condensing unit, and described autotracker is connected with described beam condensing unit.
8. optical fiber illuminating system as claimed in claim 7 is characterized in that, described fibre bundle is the silica fibre bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320093672 CN203082799U (en) | 2013-03-01 | 2013-03-01 | Optical fiber illumination system and optical fiber illumination spotlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320093672 CN203082799U (en) | 2013-03-01 | 2013-03-01 | Optical fiber illumination system and optical fiber illumination spotlight device |
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| Publication Number | Publication Date |
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| CN203082799U true CN203082799U (en) | 2013-07-24 |
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ID=48828632
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| CN 201320093672 Expired - Fee Related CN203082799U (en) | 2013-03-01 | 2013-03-01 | Optical fiber illumination system and optical fiber illumination spotlight device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676120A (en) * | 2014-01-03 | 2014-03-26 | 哈尔滨工业大学 | Rotary solar concentrating method based on Cassegrain reflection principle |
-
2013
- 2013-03-01 CN CN 201320093672 patent/CN203082799U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676120A (en) * | 2014-01-03 | 2014-03-26 | 哈尔滨工业大学 | Rotary solar concentrating method based on Cassegrain reflection principle |
| CN103676120B (en) * | 2014-01-03 | 2015-10-28 | 哈尔滨工业大学 | Based on the rotary solar concentrating method of Cassegrain's principle of reflection |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130724 Termination date: 20140301 |