CN102748617A - Reverse Cassegrain type LED uniform-light illumination system - Google Patents
Reverse Cassegrain type LED uniform-light illumination system Download PDFInfo
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- CN102748617A CN102748617A CN2012102064598A CN201210206459A CN102748617A CN 102748617 A CN102748617 A CN 102748617A CN 2012102064598 A CN2012102064598 A CN 2012102064598A CN 201210206459 A CN201210206459 A CN 201210206459A CN 102748617 A CN102748617 A CN 102748617A
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Abstract
The invention relates to a reverse Cassegrain type LED (light emitting diode) uniform-light illumination system which is applied to an illumination device capable of emitting uniform light beams and an illumination device of which the emitted light beam has enhanced brightness. The reverse Cassegrain type LED uniform-light illumination system comprises a concave mirror, a convex mirror and an LED luminous chip, wherein the concave mirror and the convex mirror are coaxially arranged in parallel; the LED luminous chip and the center of the optical system are located on the same line; the LED luminous chip is arranged between the concave mirror and the convex mirror and located on the focus F1 of the convex mirror; and the light beams emitted by the LED luminous chip irradiate the convex mirror, are reflected by the convex mirror to the concave mirror, and then are emitted in parallel to the optical axis after being reflected. The system provided by the invention has a simple and novel structure, is convenient to adjust and easy to realize, and overcomes the defects of excessively large area of multiple light sources, non-uniform divergence angle and the like by use of a single LED luminous chip, so that the brightness of the emitted light spots is enhanced and uniform. The system is suitable for an illumination device capable of emitting uniform light beams and an illumination device of which the emitted light beam has enhanced brightness, and has strong practicability.
Description
Technical field
The present invention relates to a kind of contrary equal lighting system of Cassegrain's formula LED, be applicable to the lighting device that can send uniform beam and send the lighting device that beam brightness strengthens.
Background technology
A kind of reflective optics that classical Cassegrain's optical system is made up of two speculums.The big primary mirror that is called is a paraboloidal mirror in the speculum, and the little secondary mirror that is called is a hyperbolic mirror.Generally, be the central openings of paraboloidal mirror at primary mirror, directional light incident is reflected through primary mirror, and secondary mirror is with these light reflections then, and the perforate of passing primary mirror central authorities converges on the focal plane at primary mirror rear.Traditional Cassegrain's optical system belongs to reflect system, can accept more energy, and has characteristics such as volume is little, in light weight, compact conformation.Usually, illuminator is utilized a plurality of light illuminations usually in order to obtain brighter light beam, but its area is excessive, and the angle of divergence is inhomogeneous thereupon, and the light beam that sends can not evenly distribute.
Summary of the invention
The object of the present invention is to provide a kind of contrary equal lighting system of Cassegrain's formula LED, solved the problems referred to above that prior art exists.Based on the structure and the characteristics of traditional Cassegrain's optical system, a kind of contrary equal lighting system of Cassegrain's formula LED is proposed, promptly utilize single LED as illuminating source, after illuminator, send hot spot even and that brightness strengthens.The present invention is based on the structure of traditional Cassegrain's optical system, utilize two combination of concave mirror and convex mirror, and central axis is on same straight line; The parallel placement in front and back, the perforate of convex mirror middle position, the light beam irradiates convex mirror that single LED sends; After the convex mirror reflection,, by the concave mirror reflection, send collimated light beam then by the outgoing of convex mirror central hole through focal point F; Thereby obtain evenly the hot spot that brightness strengthens.
Above-mentioned purpose of the present invention realizes through following technical scheme:
The contrary equal lighting system of Cassegrain's formula LED comprises concave mirror 1, convex mirror 2 and LED luminescence chip 3; Said concave mirror 1 is placed with convex mirror 2 coaxial parallel; The center of LED luminescence chip 3 and optical system is on same straight line; LED luminescence chip 3 is placed in the middle of concave mirror 1 and the convex mirror 2, and in the focal point F of convex mirror 2
1On; The light beam irradiates convex mirror 2 that LED luminescence chip 3 sends also reflexes to concave mirror 1 by it, after its reflection, is parallel to the optical axis outgoing.
The present invention is based on the structure of traditional Cassegrain's optical system; Utilize some reflection characteristics of concave surface parabolic mirror and convex surface hyperbolic speculum, promptly the parabolic mirror of concave surface can converge in all light that are parallel to optical axis incident on the single point---focus; The hyperboloidal mirror of convex surface has two focuses, can all light through one of them focus be reflexed on another focus.The principle of tradition Cassegrain optical system is: the concave surface parabolic mirror will get into the parallel rays reflection of system and converge on the focus; This point also is a focus of convex surface hyperbolic speculum; Convex surface hyperbolic speculum reflexes to another focus with these light then, just can observe image at there.
The present invention utilizes the principle of traditional Cassegrain's optical system; The position of conversion concave surface parabolic lens and convex surface hyperbolic mirror; Light source is placed on the focus; The irradiate light convex surface hyperbolic mirror that this light source sends is because light is through a focus, so can be through another focus after the mirroring of convex surface hyperbolic.Reflection characteristic according to the concave surface parabolic lens can be known, after the light reflection through its focus, can obtain being parallel to the light of optical axis.Thus, penetrate by the central hole of the parallel rays after the reflection of concave surface parabolic lens by convex surface hyperbolic mirror.
Beneficial effect of the present invention is: with compared with techniques formerly; The present invention is simple in structure, novel, and is easy to adjust, realizes easily; Utilize single LED luminescence chip to overcome defectives such as a plurality of light source areas are excessive, the angle of divergence is inhomogeneous, hot spot brightness after the outgoing is strengthened and evenly.Be applicable to the lighting device that can send uniform beam and send the lighting device that beam brightness strengthens.Practical.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative example of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.
Fig. 1 is a structural representation of the present invention.
Among the figure: 1. concave mirror, 2. convex mirror, 3.LED luminescence chip.
The specific embodiment
Further specify the detailed content of the present invention and the specific embodiment thereof below in conjunction with accompanying drawing.
Referring to Fig. 1; The contrary equal lighting system of Cassegrain's formula LED of the present invention; Mainly comprise concave mirror 1, convex mirror 2 and LED luminescence chip 3, said concave mirror 1 is placed with convex mirror 2 coaxial parallel, and the center of LED luminescence chip 3 and optical system is on same straight line; LED luminescence chip 3 is placed in the middle of concave mirror 1 and the convex mirror 2, and in the focal point F of convex mirror 2
1On; The light beam irradiates convex mirror 2 that LED luminescence chip 3 sends also reflexes to concave mirror 1 by it, after its reflection, is parallel to the optical axis outgoing.
According to some reflection characteristics of concave surface parabolic mirror and convex surface hyperbolic speculum, promptly the parabolic mirror of concave surface can converge in all light that are parallel to optical axis incident on the single point---focus; The hyperboloidal mirror of convex surface has two focuses, can all light through one of them focus be reflexed on another focus.Hence one can see that, and the concave surface parabolic lens also can be reflected into parallel rays with the light through overfocus.The light beam part that LED luminescence chip 3 sends is via the direct outgoing of the central hole of convex mirror 2, and another part is through convex mirror 2 reflections, through another focal point F and shine concave mirror 1, after concave mirror 1 reflection, is parallel to optical axis and penetrated by the central hole of convex mirror 2.Two parts light stack strengthens the brightness of hot spot and evenly.
Because the LED luminescence chip itself is not a uniform illuminator, certain lighting angle is arranged, so its light illumination of sending can change to some extent along with the quantity of LED luminescence chip and arrangement mode thereof.During as light source, irradiated area is excessive as a plurality of LED luminescence chips, and lighting angle is inhomogeneous, causes the hot spot uneven illumination of outgoing even.And single LED luminescence chip is during as light source, light via two speculums after parallel rays penetrate and illumination even.
The above is merely preferred embodiment of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. contrary equal lighting system of Cassegrain's formula LED; It is characterized in that: comprise concave mirror (1), convex mirror (2) and LED luminescence chip (3); Said concave mirror (1) and convex mirror (2) coaxial parallel are placed, and the center of LED luminescence chip (3) and optical system is on same straight line; LED luminescence chip (3) is placed in the middle of concave mirror (1) and the convex mirror (2), and in the focal point F of convex mirror (2)
1On; The light beam irradiates convex mirror (2) that LED luminescence chip (3) sends also reflexes to concave mirror (1) by it, after its reflection, is parallel to the optical axis outgoing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102064598A CN102748617A (en) | 2012-06-21 | 2012-06-21 | Reverse Cassegrain type LED uniform-light illumination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102064598A CN102748617A (en) | 2012-06-21 | 2012-06-21 | Reverse Cassegrain type LED uniform-light illumination system |
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| Publication Number | Publication Date |
|---|---|
| CN102748617A true CN102748617A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102064598A Pending CN102748617A (en) | 2012-06-21 | 2012-06-21 | Reverse Cassegrain type LED uniform-light illumination system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021289A (en) * | 2014-04-30 | 2015-11-04 | 热映光电股份有限公司 | non-contact temperature measurement apparatus |
| CN105182510A (en) * | 2015-07-20 | 2015-12-23 | 中国科学院上海光学精密机械研究所 | Spherical Cassegrain system for imaging finite target and adjusting method of spherical Cassegrain system |
| CN106151966A (en) * | 2015-04-04 | 2016-11-23 | 艾道全 | A kind of many LED combination focus on remote projection light fixture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4777491A (en) * | 1986-07-18 | 1988-10-11 | Gte Telecommunicazioni, S.P.A. | Angular-diversity radiating system for tropospheric-scatter radio links |
| EP0872752A1 (en) * | 1997-04-18 | 1998-10-21 | Aerospatiale Societe Nationale Industrielle | Interferometric telescope system |
| CN101440931A (en) * | 2007-11-23 | 2009-05-27 | 北京美联华新测控技术有限公司 | Reflecting apparatus fir improving light utilization ratio and lighting intensity and reducing irradiation area |
-
2012
- 2012-06-21 CN CN2012102064598A patent/CN102748617A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4777491A (en) * | 1986-07-18 | 1988-10-11 | Gte Telecommunicazioni, S.P.A. | Angular-diversity radiating system for tropospheric-scatter radio links |
| EP0872752A1 (en) * | 1997-04-18 | 1998-10-21 | Aerospatiale Societe Nationale Industrielle | Interferometric telescope system |
| CN101440931A (en) * | 2007-11-23 | 2009-05-27 | 北京美联华新测控技术有限公司 | Reflecting apparatus fir improving light utilization ratio and lighting intensity and reducing irradiation area |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021289A (en) * | 2014-04-30 | 2015-11-04 | 热映光电股份有限公司 | non-contact temperature measurement apparatus |
| CN105021289B (en) * | 2014-04-30 | 2018-10-19 | 热映光电股份有限公司 | Non-contact type temperature measurement devices |
| CN106151966A (en) * | 2015-04-04 | 2016-11-23 | 艾道全 | A kind of many LED combination focus on remote projection light fixture |
| CN105182510A (en) * | 2015-07-20 | 2015-12-23 | 中国科学院上海光学精密机械研究所 | Spherical Cassegrain system for imaging finite target and adjusting method of spherical Cassegrain system |
| CN105182510B (en) * | 2015-07-20 | 2017-07-14 | 中国科学院上海光学精密机械研究所 | To the sphere Cassegrain system and its method of adjustment of limited remote object plane imaging |
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Application publication date: 20121024 |
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