CN204648006U - A kind of LED optical system of adjustable focus - Google Patents
A kind of LED optical system of adjustable focus Download PDFInfo
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- CN204648006U CN204648006U CN201520340416.8U CN201520340416U CN204648006U CN 204648006 U CN204648006 U CN 204648006U CN 201520340416 U CN201520340416 U CN 201520340416U CN 204648006 U CN204648006 U CN 204648006U
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Abstract
The utility model discloses a kind of LED optical system of adjustable focus, comprise the optical module of reflective light conducting cylinder, LED light source and the movement on light direction of relative reflection formula light conducting cylinder; Reflective light conducting cylinder comprises and connects by the reflecting plate of more than three pieces the cylindrical shell surrounded successively, and described reflecting plate comprises plate body and is located at the reflecting layer on plate body; According to the exit direction of light, cylindrical shell comprises light input part, reflected beam portion and bright dipping part successively, and wherein bright dipping part is greater than light input part and makes cylindrical shell tapered; LED light source is located at one end of light input part; Optical module is located at the front of cylindrical shell light direction, and optical module is driven by drive unit.This structure can better manufacture light conducting cylinder, reduces costs, and makes the color of bright dipping more even, and can carry out secondary condensation, and convenient focusing.
Description
Technical field
The utility model relates to a kind of LED optical system of adjustable focus, especially relates to and can carry out multiple reflections and the LED optical system that can change the adjustable focus of rising angle.
Background technology
For LED lamp, in order to obtain different rising angles and light efficiency, usually realized by optical element, current optical element mainly contains lens, reflector etc.
Lens are optical elements the most common in LED lamp, and its Main Function is optically focused.When optical design, iff employing lens optically focused is carried out to the LED light source of multiple color, when LED light source be polychromatic source or multi-chip light source time, there will be the phenomenon that optically focused back mixing light is uneven.
In LED lamp, if employ reflector, control both optical angle could be realized by the reflective surface constructing more complicated.And more difficult control even light mixing.Also easily occur when forming hot spot that spot center has speck, has the flaw of the optical effect such as vignette, veiling glare around.
Certainly, in some light fixture, also adopt light-guiding pillar as light-guide device, at present, because of the reason manufactured, light-guiding pillar is plastics light-guiding pillar substantially.The guide-lighting principle of light-guiding pillar utilizes the refractive index of two media different and makes to enter into the light in light-guiding pillar in the generation total reflection of the border of light-guiding pillar, thus realize guide-lighting, like this, once the medium in light-guiding pillar and its external world there occurs change, light-guiding pillar such as, there are greasy dirt or contactant, then light cannot realize whole total reflections, part light is just had to penetrate from the side of light-guiding pillar, leaded light is made to have certain loss, namely can light-guiding pillar carry out normal guide-lighting larger by external influence, make guide-lighting stability bad, based on this impact, light-guiding pillar can not be random be fixed, otherwise the refraction performance of light-guiding pillar can be affected.In addition, all there is the low problem of transmitance in plastic optics material, and when the stroke of light in plastic material is longer, light penetration is lower; The heatproof of plastic material is not high yet, generally at about 120 DEG C; Higher in the local temperature near light source, easily there is the phenomenon of burning in plastics light-guiding pillar.
Certainly, also occur now utilizing light conducting cylinder to carry out guide-lighting technical scheme, as at application number be 201220694731.7 patent document in disclose a kind of LED remote projection lamp, light conducting cylinder is employed as light-guide device in this light fixture, but this light conducting cylinder is circular, therefore, the effect of reflection light be reached, cumbersome at manufacture view.
Summary of the invention
In order to better manufacture light conducting cylinder, reduce costs, make the color of bright dipping more even, and carry out secondary condensation, convenient focusing, the utility model provides a kind of LED optical system of adjustable focus.
For achieving the above object, a kind of LED optical system of adjustable focus, comprises the optical module of reflective light conducting cylinder, LED light source and the movement on light direction of relative reflection formula light conducting cylinder; Reflective light conducting cylinder comprises and connects by the reflecting plate of more than three pieces the cylindrical shell surrounded successively, and described reflecting plate comprises plate body and is located at the reflecting layer on plate body; According to the exit direction of light, cylindrical shell comprises light input part, reflected beam portion and bright dipping part successively, and wherein bright dipping part is greater than light input part and makes cylindrical shell tapered; LED light source is located at one end of light input part; Optical module is located at the front of cylindrical shell light direction, and optical module is driven by drive unit.
Further, LED light source comprises the LED chip of two or more different colours.
Further, described plate body is glass plate body, and reflecting layer is plated on the inner surface of glass plate body.
Further, the light angle entered in cylindrical shell is a, and the angle of light injection cylindrical shell is b, and the angle of reflecting layer and body centre axis is c, and the order of reflection of light in cylindrical shell is n, then have b=a-2nc.
Further, be connected by viscose glue between reflecting plate.
Further, described LED light source comprises white light, ruddiness, blue light and green glow chip.
Further, described drive unit comprises support, screw rod, nut and motor, and screw rod is located on support, and nut is fixed in optical module, and screw rod is meshed with nut, and motor-driven screw rotates.
The beneficial effects of the utility model are: because the reflecting plate of cylindrical shell by more than three pieces forms, therefore, first reflecting layer is molded into after on plate body and connects reflecting plate again, like this, reflecting layer shaping very convenient, simple, even, temperature tolerance is good, makes of the present utility modelly to have the easily manufactured, simple of the LED light source of reflective light conducting cylinder, and cost is low, and because of reflecting layer even, therefore, reflectivity is high, reflection effective.Owing to can carry out the reflection of more than secondary in cylindrical shell except excentral light, when after the LED chip that have employed multiple different colours, light is after cylindrical shell, physics mixed light can be carried out in reflection process, like this, uniform virtual point source or area source can be formed at the rear of the exit of light conducting cylinder or front optical module, after this light source is further across optical module, bright dipping can be made photochromic more even, without color distortion, in addition, this light source is through optical module, if spot light or area source are when optical module focal position, emergent ray is directional light, angle is minimum, as when spot light or area source are within optical module focal length, emergent ray angle changes along with the distance of spot light or area source and optical module and changes, and then realizes the effect regulating outgoing spot size, concrete principle is: spot light or area source distance optical module nearer, divergence of beam angle is larger, and spot light or area source are far away apart from optical module, and divergence of beam angle is less, and when when focal position, divergence of beam angle is minimum.Owing to being provided with drive unit, therefore, convenient focusing.In the utility model, utilize the cylindrical shell of taper, can rising angle be reduced, make it more easily reach actual instructions for use.Owing to adopting viscose glue to connect reflecting plate, therefore, the connection of reflecting plate is more convenient.
Accompanying drawing explanation
Fig. 1 is the stereogram of reflective light conducting cylinder.
Fig. 2 is the sectional view of the LED optical system of adjustable focus.
Fig. 3 is the schematic diagram of LED light source.
Fig. 4 is spot light light dispersion angle schematic diagram when optical module focus place.
Fig. 5 be spot light within optical module focus time light dispersion angle schematic diagram.
Fig. 6 is spot light light dispersion angle schematic diagram when closer optical module.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
As shown in Figure 2, a kind of LED optical system of adjustable focus comprises reflective light conducting cylinder 110, LED light source 111 and optical module 112.
As depicted in figs. 1 and 2, reflective light conducting cylinder 110 comprises and connects by the reflecting plate 1 of more than three pieces the cylindrical shell 100 surrounded successively.Described reflecting plate 1 comprises plate body and is located at the reflecting layer on plate body, and the reflectivity in reflecting layer is greater than 98%; Described plate body preferred glass, can certainly select other material; Reflecting layer is plated on the inner surface of plate body, and described reflecting layer is plane.Be connected by viscose glue between reflecting plate 1, other mode can certainly be adopted to connect, as long as be connected firmly by reflecting plate.Adopt this structure, can first shaping reflecting layer, then reflecting plate is being linked together, such that the manufacture of light conducting cylinder is simple, cost is low, and such figured reflective layer, can allow the uniformity in reflecting layer high, make reflectivity high, reflecting effect is good, high to the utilization rate of light.
According to the exit direction of light, cylindrical shell comprises light input part 11, reflected beam portion 12 and bright dipping part 13 successively, and wherein bright dipping part 13 is greater than light input part 11 and makes cylindrical shell tapered, except excentral light is at least reflected twice in cylindrical shell.In the present embodiment, the setting light angle entered in cylindrical shell is a, and the angle of light injection cylindrical shell is b, and the angle of reflecting layer and body centre axis is c, and the order of reflection of light in cylindrical shell is n, then have b=a-2nc.Like this, when adopting conical shell, can rising angle be reduced, making it more easily reach actual instructions for use.
As shown in Figure 3, LED light source is located at one end of light input part.Described LED light source comprises white light, ruddiness, blue light and green glow chip.
Described optical module 112 is located at the front of reflective light conducting cylinder.Optical module can be made up of single lens, also can be multiple optical frames composition.Optical module is driven by drive unit, and described drive unit comprises support, screw rod, nut and motor, and screw rod is located on support, nut is fixed in optical module, and screw rod is meshed with nut, and motor-driven screw rotates, certainly, screw rod also can have and manually rotates.When screw rod rotates, screw rod can impel nut rectilinear motion, thus drives optical module motion, reaches the object regulating optical module position, like this, and the just very convenient object realizing focusing.
Owing to can carry out the reflection of more than secondary in cylindrical shell except excentral light, when after the LED chip that have employed multiple different colours, light is after cylindrical shell, physics mixed light can be carried out in reflection process, like this, uniform virtual point source or area source can be formed at the rear of the front optical module of light conducting cylinder, after this light source is further across optical module, bright dipping can be made photochromic more even, without color distortion, in addition, as shown in Figures 4 to 6, this light source is through optical module, if spot light or area source are when optical module focal position, emergent ray is directional light, angle is minimum, as when spot light or area source are within optical module focal length, emergent ray angle changes along with the distance of spot light or area source and optical module and changes, and then realizes the effect regulating outgoing spot size, concrete principle is: spot light or area source distance optical module nearer, divergence of beam angle is larger, and spot light or area source are far away apart from optical module, and divergence of beam angle is less, and when when focal position, divergence of beam angle is minimum.
Claims (7)
1. a LED optical system for adjustable focus, comprises the optical module of reflective light conducting cylinder, LED light source and the movement on light direction of relative reflection formula light conducting cylinder; It is characterized in that: reflective light conducting cylinder comprises and connects by the reflecting plate of more than three pieces the cylindrical shell surrounded successively, described reflecting plate comprises plate body and is located at the reflecting layer on plate body; According to the exit direction of light, cylindrical shell comprises light input part, reflected beam portion and bright dipping part successively, and wherein bright dipping part is greater than light input part and makes cylindrical shell tapered; LED light source is located at one end of light input part; Optical module is located at the front of cylindrical shell light direction, and optical module is driven by drive unit.
2. the LED optical system of adjustable focus according to claim 1, is characterized in that: LED light source comprises the LED chip of two or more different colours.
3. the LED optical system of adjustable focus according to claim 1, is characterized in that: described plate body is glass plate body, and reflecting layer is plated on the inner surface of glass plate body.
4. the LED optical system of adjustable focus according to claim 1, it is characterized in that: the light angle entered in cylindrical shell is a, the angle of light injection cylindrical shell is b, and the angle of reflecting layer and body centre axis is c, the order of reflection of light in cylindrical shell is n, then have b=a-2nc.
5. the LED optical system of adjustable focus according to claim 1, be is characterized in that: be connected by viscose glue between reflecting plate.
6. the LED optical system of adjustable focus according to claim 1, is characterized in that: described LED light source comprises white light, ruddiness, blue light and green glow chip.
7. the LED optical system of adjustable focus according to claim 1, it is characterized in that: described drive unit comprises support, screw rod, nut and motor, screw rod is located on support, and nut is fixed in optical module, screw rod is meshed with nut, and motor-driven screw rotates.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340416.8U CN204648006U (en) | 2015-05-25 | 2015-05-25 | A kind of LED optical system of adjustable focus |
| PCT/CN2015/100235 WO2016188117A1 (en) | 2015-05-25 | 2015-12-31 | Reflective light guide barrel, led light source and optical system |
| US15/515,151 US10139075B2 (en) | 2015-05-25 | 2015-12-31 | Reflective light guide tube and LED light source, and optical system |
| EP15893185.7A EP3203279A4 (en) | 2015-05-25 | 2015-12-31 | Reflective light guide barrel, led light source and optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520340416.8U CN204648006U (en) | 2015-05-25 | 2015-05-25 | A kind of LED optical system of adjustable focus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204648006U true CN204648006U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520340416.8U Active CN204648006U (en) | 2015-05-25 | 2015-05-25 | A kind of LED optical system of adjustable focus |
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| CN (1) | CN204648006U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016188117A1 (en) * | 2015-05-25 | 2016-12-01 | 广州市雅江光电设备有限公司 | Reflective light guide barrel, led light source and optical system |
| CN107388054A (en) * | 2017-07-26 | 2017-11-24 | 江门吉华光电精密有限公司 | RGBW uniform mixed light reflecting drums |
| CN107527987A (en) * | 2017-07-26 | 2017-12-29 | 江门吉华光电精密有限公司 | A kind of high-efficiency light mixing reflecting drum |
-
2015
- 2015-05-25 CN CN201520340416.8U patent/CN204648006U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016188117A1 (en) * | 2015-05-25 | 2016-12-01 | 广州市雅江光电设备有限公司 | Reflective light guide barrel, led light source and optical system |
| US10139075B2 (en) | 2015-05-25 | 2018-11-27 | Guangzhou Yajiang Photoelectric Equipment Co., Ltd | Reflective light guide tube and LED light source, and optical system |
| CN107388054A (en) * | 2017-07-26 | 2017-11-24 | 江门吉华光电精密有限公司 | RGBW uniform mixed light reflecting drums |
| CN107527987A (en) * | 2017-07-26 | 2017-12-29 | 江门吉华光电精密有限公司 | A kind of high-efficiency light mixing reflecting drum |
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