CN1924635A - Dispersive light-emitting diode optical fiber illuminating system - Google Patents
Dispersive light-emitting diode optical fiber illuminating system Download PDFInfo
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- CN1924635A CN1924635A CNA2005100934110A CN200510093411A CN1924635A CN 1924635 A CN1924635 A CN 1924635A CN A2005100934110 A CNA2005100934110 A CN A2005100934110A CN 200510093411 A CN200510093411 A CN 200510093411A CN 1924635 A CN1924635 A CN 1924635A
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Abstract
This invention relates to distribution diode fiber lighting system used to improve discrete image brightness in planetarium, which comprises the following parts: light diode, coupler, even device, light fiber beam, light guide board, constant star mask and projection lens, wherein, light from light diode irradiation and through coupler enters the even device and then into the light fiber beam and continues each fiber distribution transmission; each fiber end is inserted with fiber guide board to its parallel guide hole to the light axis and calibrates six transparent holes of constant star mask mode.
Description
Technical field the present invention relates to the distributing fixed star asterism illuminator of a kind of fiber-optic illuminated system, particularly planetarium fixed star projector.
The optics planetarium that background technology is traditional, its fixed star sky are to be formed by dozens of fixed star projector projection splicing-in.Single fixed star projector is by light source, condenser, and fixed star mask plate (lantern slide) and projection objective are formed, and its principle of work is identical with slide projector.A georama is arranged on the planetarium, and each fixed star projector is arranged on the ball equably, and the optical axis of each projector all points to the centre of sphere, a shared light source that is positioned at the centre of sphere.The light that condenser sends light source converges in the porch of projection objective, that is to say the energy of light source that is entered the condenser bore by light source, is converged the back and projects on the canopy of the heavens by projection objective, and whole visual field is illuminated.The fixed star mask plate is placed at the focal plane place of projection objective, and it is to be carved with many printing opacity apertures of representing fixed star on a lighttight base plate.Each printing opacity aperture of fixed star mask plate is incident upon resembling on the canopy of the heavens by projection objective, is exactly each fixed star that planetarium fixed star projector is shown.The principle of work of above-mentioned traditional planetarium, details can be referring to the book " Das Zeiss-Planetarium " (Gustav FischerVerlag, Jena, 1955) of Heinz Letsch.
Obviously in the traditional optical planetarium, the efficiency of light energy utilization of fixed star sky projection method is extremely low-and this is equivalent to block entirely showing light with a lighttight base plate, makes bright field become blank screen.Wherein, just reserve useful fixed star bright spot only corresponding to the printing opacity aperture place on the fixed star mask.Because the diameter of fixed star mask plate printing opacity aperture is very little, the total area that all printing opacity apertures are added up is also less than the per mille of fixed star mask plate area.In other words, enter the energy of light source of condenser, wherein stopped by the lightproof part of fixed star mask plate above 99.9%, finally be converted into useless harmful on the contrary heat energy, total efficiency of light energy utilization is less than per mille.
The illumination of fixed star is the key technical index of planetarium.In order to improve the illumination of planetarium projection fixed star, classic method is the power that increases light source.For example in the Infinium planetarium of this Minolta of order (Minolta) factory, adopt the light source of 4KW, but brought a series of problems such as heat radiation thereupon.Obviously rational technology solution route is the utilization ratio that improves energy of light source.The patent of invention WP286 of German Cai Si (Zeiss) factory in 1978 (back 1988 obtain U.S. Pat 476666) proposes for this reason, forms fibre-optic bundles with many light transmitting fibers, makes the close light source of input end of pencil, and absorbs energy from light source with condenser.Output terminal then scatter, and respectively with energy of light source, directs into the printing opacity aperture place that each is scribed on the fixed star mask plate by every light transmitting fiber.So just guaranteeing needs the printing opacity aperture regional area of illumination to be thrown light on, and does not have other place of printing opacity aperture not illuminated.Because the method has improved the utilization factor of energy of light source greatly, therefore can significantly increase the illumination of fixed star asterism.But in this Deutsche Bundespatent WP286 (U.S. Pat 476666 is identical), still left over some defective: the first, though having improved energy of light source, this patent enters the later utilization factor of condenser, condenser is still on the low side to the collection rate of light source total radiation energy; The second, concentrate light illumination owing to adopt, cause the interior tens of fibre bundles of fixed star ball crisscross, not only assemble maintenance difficult, and the easy damaged of light transmitting fiber; The 3rd, concentrated light source adopts glow discharge spot lamp such as xenon lamp or metal halid lamp more, and these light sources need be waited for preheating and cool time, can not be with driveing with the pass, the layout of items on the program is applied many restrictions; Therefore and the light modulating device that is equipped with has increased complicacy the 4th, glow discharge spot lamp itself can't light modulation; The 5th, when lighting, must trigger glow discharge spot lamp with up to ten thousand volts high voltage, be easy to control system is caused interference.
The method that summary of the invention the objective of the invention is to utilize the light emitting diode (LED) of novel high brightness to disperse illumination, with the function combinations parts of " light emitting diode-coupling mechanism-even device-conduction fibre bundle-optic fibre guide plate-fixed star mask plate-projection objective ", make independently closed module.The life-span of solid luminescent diode reaches 100,000 hours, and several times even number decuple traditional incandescent lamp or gas-discharge lamp, have reached cycle life-cycle of product, need not after the one-step installation to change.The luminous energy that light emitting diode among the present invention sends can be collected by high-level efficiency and utilize, thereby condenser is to light source total radiation energy collection rate problem on the low side in the solution prior art.Simultaneously because in the independent light structures of dispersion of the present invention, separate between each " light emitting diode-coupling mechanism-even device-conduction fibre bundle-fixed star mask plate-projection objective " functional module, eliminate prior art and adopted the light illumination method of concentrating, cause tens of chaotic situations that fibre-optic bundle is crisscross in the fixed star ball, the danger of fragile fibre-optic bundle damaged has also been avoided in maintenance both convenient for assembly.The brightness regulation of light emitting diode realizes easily, does not need to be difficult to the additional light modulating device that light modulation must be equipped with, simplified structure on the whole because of gas-discharge lamp itself.Light emitting diode belongs to the low-voltage low-power device, and is safe in utilization, and control circuit is simple, at any time switch, light modulation does not arbitrarily resemble glow discharge spot lamp such as xenon lamp or metal halid lamp, preheating and cool time are arranged, therefore the invention enables the layout of items on the program no longer to be restricted.Light emitting diode does not need up to ten thousand volts high-tension triggering, thereby has avoided control system is caused the possibility of interference fully.The present invention is with regard to comprehensive problem that has solved the prior art existence like this.
The object of the present invention is achieved like this: as seen from Figure 1, the present invention includes the light emitting diode 1 of high brightness, coupling mechanism 2, evenly device 3, fibre-optic bundle 4, optic fibre guide plate 5, fixed star mask plate 6 and projection objective 7.From the light of light emitting diode 1 radiation, behind coupling mechanism 2, enter even device 3, do to be radiated at after homogenising is handled the porch of fibre-optic bundle 4 right-hand members.Enter the light of fibre-optic bundle 4, continue again to disperse transmission left by each bar optical fiber, the end of every optical fiber inserts respectively in the guide hole that is parallel to optical axis on the optic fibre guide plate 5 accordingly, makes the end of every optical fiber can both aim at corresponding each printing opacity aperture on the fixed star mask plate 6.Like this on the fixed star mask plate 6 by the printing opacity aperture of optical fibre illumination, no matter be the center, visual field that is positioned near optical axis, or be positioned at field of view edge position away from optical axis, can both on the canopy of the heavens 8, project the star aberration spot by the projection objective 7 of telecentric beam path (Telecentric).
Description of drawings is below in conjunction with the drawings and specific embodiments, and the present invention is described in more detail.
Fig. 1 is the principle of work synoptic diagram of distributing light emitting diode optical fiber illuminator of the present invention.
Fig. 2 is the structural representation of the distributing light emitting diode optical fiber illuminator of first kind of embodiment.
Fig. 3 is the structural representation of the distributing light emitting diode optical fiber illuminator of second kind of embodiment.
Fig. 4 is the structural representation of the distributing light emitting diode optical fiber illuminator of the third embodiment.
Fig. 5 is the structural representation of the distributing light emitting diode optical fiber illuminator of the 4th kind of embodiment.
Fig. 6 is the structural representation of the distributing light emitting diode optical fiber illuminator of the 5th kind of embodiment.
Embodiment first kind of embodiment of the present invention seen Fig. 2.The manner is applicable to the light emitting diode of narrow beam.From the light of light emitting diode 1 radiation, after collecting, lens 21 focus on the A place, inlet center of even device 3.After the light that enters even device 3 is subjected to homogenising, be radiated at the porch of fibre-optic bundle 4 right-hand members.Enter the light of fibre-optic bundle 4, continue to disperse transmission left by each bar optical fiber, the end of every optical fiber, insert respectively in the guide hole that is parallel to optical axis on the optic fibre guide plate 5 accordingly, make the end of every optical fiber can both aim at corresponding each printing opacity aperture on the fixed star mask plate 6, aperture is thrown light on.So by each printing opacity aperture of optical fibre illumination, can on the canopy of the heavens 8, project the star aberration spot on the fixed star mask plate 6 by projection objective 7.Because each guide hole on the optic fibre guide plate 5 all is parallel to optical axis, but different apart from the distance of optical axis.Therefore projection objective 7 must adopt the telecentric beam path structure, to guarantee on the fixed star mask plate 6 by each printing opacity aperture of optical fibre illumination, no matter be the center, visual field that is positioned near optical axis, or be positioned at field of view edge position away from optical axis, can both show on the canopy of the heavens 8 by the projection objective 7 of telecentric beam path.
Second kind of embodiment of the present invention seen Fig. 3.The manner is applicable to the light emitting diode of limit luminous (Side Emitting).Because the luminous light emitting diode in limit, the major part of its radius perpendicular near axis, therefore should adopt the reverberation bowl beam condensing unit.As seen from Figure 3, from the vertical axial ray of light emitting diode 1 radiation, focus on the A place, inlet center of even device 3 through elliptical reflecting bowl 22.Thereafter process repeats no more with first kind of embodiment.Should be noted that: elliptical reflecting bowl 22 both can adopt the ghost shape structure among Fig. 3, also can manufacture entity structure with glass or optical plastic etc., utilize the appearance profile of its oval solid of revolution, to after internal reflection, focus on the A place, inlet center of even device 3 from the vertical axial ray of light emitting diode 1 radiation.
The third embodiment of the present invention is seen Fig. 4.The manner is applicable to the light emitting diode of casual luminous (Lambertian).Because casual luminous light emitting diode, the intensity of its radius evenly distributes in 180 ° of hemisphere forwardly basically, therefore both needed to adopt the reverberation bowl beam condensing unit, collected radius, and also needed to adopt lens to collect and the less radius of axis angle perpendicular near axis.As seen from Figure 4, from light emitting diode 1 radiation with the vertical axial ray of axis angle greater than B, focus on the A place, inlet center of even device 3 through elliptical reflecting bowl 22.With the radius of axis angle,, therefore need to replenish a lenslet 23 simultaneously, make this part radius also focus on the A place, inlet center of even device 3 owing to can't be collected by elliptical reflecting bowl 22 less than B.Thereafter process repeats no more with first kind of embodiment.Should be noted that equally: elliptical reflecting bowl 22 both can adopt the ghost shape structure among Fig. 4, also can manufacture entity structure with glass or optical plastic etc., utilize the appearance profile of its oval solid of revolution, to after internal reflection, focus on the A place, inlet center of even device 3 from the vertical axial ray of light emitting diode 1 radiation.
The 4th kind of embodiment of the present invention seen Fig. 5, and it also is applicable to casual luminous light emitting diode.Though also adopt reverberation bowl and lens to collect radius in the present embodiment, the mode of coupling is slightly different.As seen from Figure 5, from light emitting diode 1 radiation with the vertical axial ray of axis angle greater than B, be converted to directional light through parabolic reverberation bowl 24.With the radius of axis angle,, also need replenish a lenslet 23 simultaneously, make this part radius also be converted to directional light owing to can't collect by polished object reverberation bowl 24 less than B.By collimation lens 25 above-mentioned two bundle directional lights are all focused on the A place, inlet center of even device 3 at last.Thereafter process repeats no more with first kind of embodiment.Should be noted that equally: parabolic reverberation bowl 24 both can adopt the ghost shape structure among Fig. 5, also can manufacture entity structure with glass or optical plastic etc., utilize the appearance profile of its parabolic solid of revolution, will after internal reflection, be converted to directional light from the vertical axial ray of light emitting diode 1 radiation.Though it is present embodiment is slightly more complicated than the third embodiment,,, more convenient in the use to change focusing situation at the A place, inlet center of even device 3 because of collimation lens 25 can freely move along optical axis in directional light.
The 5th kind of embodiment of the present invention seen Fig. 6.The manner is applicable to the light emitting diode of narrow beam.From the light of light emitting diode 1 radiation, collect by GRIN Lens 26.The refractive index of GRIN Lens 26 increases to center line gradually from external cylindrical surface, and the direction that can make incident ray bends and is autofocusing at the A place, inlet center of even device 3.Thereafter process repeats no more with first kind of embodiment.
Because the light-emitting area structure of dissimilar light emitting diodes is different with size, the brightness uniformity of light-emitting area is also variant, and therefore whether the even device 3 in the above-mentioned various embodiments is necessary to adopt, and should determine according to actual conditions.If light emitting diode is that single light-emitting area structure and size are enough big, the brightness uniformity of light-emitting area then might directly be coupled into fibre-optic bundle 4 with the energy of light source of led radiation, thereby cancel even device 3.
Claims (10)
1, a kind of distributing light emitting diode optical fiber illuminator comprises coupling mechanism (2), even device (3), fibre-optic bundle (4), optic fibre guide plate (5), fixed star mask plate (6) and projection objective (7) is characterized in that: adopt the light emitting diode (1) of high brightness to make light source; From the light of light emitting diode (1) radiation, behind coupling mechanism (2), enter even device (3), do to be radiated at after homogenising is handled the porch of fibre-optic bundle (4); Enter the light of fibre-optic bundle (4), continue again to disperse transmission by each bar optical fiber, the end of every optical fiber inserts respectively on the optic fibre guide plate (5) and is parallel to accordingly in the guide hole of optical axis, makes the end of every optical fiber can both aim at fixed star mask plate (6) and goes up corresponding each printing opacity aperture; Fixed star mask plate (6) is gone up by the printing opacity aperture of optical fibre illumination, no matter be the center, visual field that is positioned near optical axis, or is positioned at the field of view edge position away from optical axis, can both project the star aberration spot on the canopy of the heavens (8) by the projection objective (7) of telecentric beam path.
2, distributing light emitting diode optical fiber illuminator according to claim 1, it is characterized in that:, make independently closed module the function combinations parts of " light emitting diode-coupling mechanism-even device-conduction fibre bundle-optic fibre guide plate-fixed star mask plate-projection objective ".
3, distributing light emitting diode optical fiber illuminator according to claim 1 and 2, it is characterized in that: coupling mechanism (2) adopts the lens focus mode, from the light of light emitting diode (1) radiation, focuses on the A place, inlet center of even device (3) after lens (21) are collected.
4, distributing light emitting diode optical fiber illuminator according to claim 1 and 2, it is characterized in that: coupling mechanism (2) adopts the elliptical reflecting bowl type of focusing, from the light of light emitting diode (1) radiation, focuses on the A place, inlet center of even device (3) through elliptical reflecting bowl (22).
5, distributing light emitting diode optical fiber illuminator according to claim 1 and 2, it is characterized in that: coupling mechanism (2) adopts the elliptical reflecting bowl to add the type of focusing of lenslet, from light emitting diode (1) radiation with the vertical axial ray of axis angle greater than B, focus on the A place, inlet center of even device (3) through elliptical reflecting bowl (22); With the radius of axis angle, also focus on the A place, inlet center of even device (3) via lenslet (23) simultaneously less than B.
6, distributing light emitting diode optical fiber illuminator according to claim 1 and 2, it is characterized in that: coupling mechanism (2) adopts the parabolic reverberation bowl to add the type of focusing that lenslet adds collimation lens, from light emitting diode (1) radiation with the vertical axial ray of axis angle greater than B, be converted to directional light through parabolic reverberation bowl (24); With the radius of axis angle, also be converted to directional light simultaneously, by collimation lens (25) above-mentioned two bundle directional lights all focused on the A place, inlet center of even device (3) at last via lenslet (23) less than B.
7, distributing light emitting diode optical fiber illuminator according to claim 1 and 2 is characterized in that: coupling mechanism (2) adopts the type of focusing of GRIN Lens; From the light of light emitting diode (1) radiation, collect by GRIN Lens (26); The refractive index of GRIN Lens (26) increases to center line gradually from external cylindrical surface, and the direction that can make incident ray bends and is autofocusing at the A place, inlet center of even device (3).
8, according to claim 1 or 2 or 4 or 5 described distributing light emitting diode optical fiber illuminators, it is characterized in that: elliptical reflecting bowl (22) both can be a ghost shape structure, also can manufacture entity structure with glass or optical plastic etc., utilize the appearance profile of its oval solid of revolution, to after internal reflection, focus on the A place, inlet center of even device (3) from the light of light emitting diode (1) radiation.
9, according to claim 1 or 2 or 6 described distributing light emitting diode optical fiber illuminators, it is characterized in that: parabolic reverberation bowl (24) both can be a ghost shape structure, also can manufacture entity structure with glass or optical plastic etc., utilize the appearance profile of its parabolic solid of revolution, to after internal reflection, be converted to directional light from the light of light emitting diode (1) radiation, focus on the A place, inlet center of even device (3) then by collimation lens (25).
10, according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 described distributing light emitting diode optical fiber illuminators, it is characterized in that: if light emitting diode is that single light-emitting area structure and size are enough big, the brightness uniformity of light-emitting area, then evenly device (3) can be cancelled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100934110A CN1924635A (en) | 2005-08-29 | 2005-08-29 | Dispersive light-emitting diode optical fiber illuminating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005100934110A CN1924635A (en) | 2005-08-29 | 2005-08-29 | Dispersive light-emitting diode optical fiber illuminating system |
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| CN1924635A true CN1924635A (en) | 2007-03-07 |
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| CNA2005100934110A Pending CN1924635A (en) | 2005-08-29 | 2005-08-29 | Dispersive light-emitting diode optical fiber illuminating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625106B (en) * | 2008-07-11 | 2011-10-12 | 财团法人车辆研究测试中心 | Light-emitting diode optical fiber coupling system and manufacturing method thereof |
| CN102116451B (en) * | 2009-12-31 | 2013-01-02 | 北京控制工程研究所 | Optical fiber starlight illumination system |
| CN107346044A (en) * | 2016-05-04 | 2017-11-14 | 伍少昊 | Optical fiber brightening-type optics fixed star projector |
| CN110832196A (en) * | 2017-07-07 | 2020-02-21 | 埃德温海上有限公司 | Beacon lighting device and wind turbine comprising such a device |
-
2005
- 2005-08-29 CN CNA2005100934110A patent/CN1924635A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625106B (en) * | 2008-07-11 | 2011-10-12 | 财团法人车辆研究测试中心 | Light-emitting diode optical fiber coupling system and manufacturing method thereof |
| CN102116451B (en) * | 2009-12-31 | 2013-01-02 | 北京控制工程研究所 | Optical fiber starlight illumination system |
| CN107346044A (en) * | 2016-05-04 | 2017-11-14 | 伍少昊 | Optical fiber brightening-type optics fixed star projector |
| CN110832196A (en) * | 2017-07-07 | 2020-02-21 | 埃德温海上有限公司 | Beacon lighting device and wind turbine comprising such a device |
| US11326582B2 (en) | 2017-07-07 | 2022-05-10 | Adwen Offshore, S.L. | Beacon illumination device and wind turbine comprising the device |
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