CN104214671A

CN104214671A - LED lamp with lens set

Info

Publication number: CN104214671A
Application number: CN201310226435.3A
Authority: CN
Inventors: 张发伟; 林万炯
Original assignee: 林万炯
Current assignee: Ningbo Self Electronics Co Ltd
Priority date: 2013-05-29
Filing date: 2013-05-29
Publication date: 2014-12-17
Anticipated expiration: 2033-05-29
Also published as: CN104214671B

Abstract

An LED lamp with a lens set comprises an LED light and the lens set arranged in the light emitting direction of the LED light. The LED light is arranged at the twice-focal-length focal point of the lens set. The lens set comprises a first lens and a second lens. The first lens and the second lens are both positive lenses. The first lens is arranged between the second lens and the LED light. More than 90 percent of the light emitted by the LED light enters the first lens through the distance between the main face of the second lens and the main face of the first lens. The LED light of the LED lamp with the lens set is arranged at the twice-focal-length focal point of the lens set, meanwhile, 90 percent of the light emitted by the LED light enters the first lens through the distance between the main face of the first lens and the main face of the second lens, and therefore the light emitted by the LED lamp with the lens set forms a light spot with a clear limit. When the LED lamp is used on exhibition cabinets, jewelry cabinets and other occasions needing to irradiate specific areas, the quality sense provided by irradiated objects and jewelry for people is improved.

Description

A kind of LED lamp with set of lenses

Technical field

The present invention relates to a kind of fixture, particularly a kind of LED lamp with set of lenses.

Background technology

Traditional light fixture adopts Halogen lamp LED or fluorescent lamp as electric light source usually.Halogen lamp LED or fluorescent lamp power consumption are large, and temperature is high, is unfavorable for energy-conservation.Along with the development of LED technology, it is found that LED is one of best at present lighting source, the advantages such as luminosity is high, long service life that it has.LED is widely used in illuminating lamp as light source.Along with the raising of people's living standard, comprising the light fixture that inhabitation, building, business etc. more and more bring into use some for throwing light on, particularly needing a kind of LED that uses as the light fixture of light source, to save the energy and to increase lamp life.

And be rooted in the hearts of the people along with the theory of " hommization illumination ", Lighting Design should build good house illumination or commercial lighting effect, to meet the requirement of each side such as people's physiology, psychology.Particularly in the use occasion of some exhibition cabinets, Jewelry cabinet, the article due to required irradiation are only some article that will put on display or jewelry, and other regions do not need illumination.But no matter be common conventional lamp, or existing LED lamp, it is all fuzzy in the boundary of the hot spot that irradiation area is formed, namely irradiation area is transitioned into non-irradiated region gradually, make the irradiation requirement being difficult to reach these exhibition cabinets, Jewelry cabinet, and then make irradiated article be difficult to be improved to the product texture of people.

Summary of the invention

In view of this, be necessary to provide a kind of face illuminating module with face luminescence, to overcome above-mentioned deficiency.

A kind of LED lamp with set of lenses comprises the set of lenses that a LED and are arranged on the light direction of this LED.Described LED is arranged in the focus of one times of focal length of described set of lenses.Described set of lenses comprises first lens and second lens.First, second lens described are all positive lens.Described first lens are arranged between the second lens and LED.More than 90% of the light that the interarea of described second lens makes LED send to the distance of the interarea of the first lens enters the first lens.

Compared with prior art, the set of lenses that the described LED lamp with set of lenses has comprise that two are all positive lens first, second lens, and described LED is arranged in the focus of one times of focal length of this set of lenses, simultaneously described first, 90% of the light that distance between the interarea of the second lens makes LED send enters the first lens, thus the light of the LED lamp institute outgoing making this have set of lenses forms the hot spot that has fine limit, when this LED lamp with set of lenses is used in such as exhibition cabinet, when Jewelry cabinets etc. need to irradiate the occasion of specific region, to greatly improve the article of described irradiation, jewelry is to the product texture of people.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, embodiments of the invention are described, wherein:

Fig. 1 is a kind of structural representation with the LED lamp of set of lenses provided by the invention.

Fig. 2 is the schematic cross-section with the LED lamp of set of lenses of Fig. 1.

Fig. 3 is the index path of the LED lamp with set of lenses on some cross sections of books.

Detailed description of the invention

Based on accompanying drawing, specific embodiments of the invention are further elaborated below.Should be appreciated that specific embodiment described herein is only as embodiment, the protection domain be not intended to limit the present invention.

Refer to Fig. 1 to Fig. 3, it is a kind of structural representation with the LED lamp 100 of set of lenses provided by the present invention.The described LED lamp 100 with set of lenses comprises a LED 11 and a set of lenses 12 be arranged on the light direction of this LED 11.

Described set of lenses 12 comprises first lens 121 and second lens 122.Described first lens 121 are a positive lens, and are arranged between described LED 11 and the second lens 122.These first lens 121 are that taper seat is protruding along side in the both sides of the light direction of LED 11, and opposite side is plane, and described LED 11 is arranged on that side that these first lens 121 have plane simultaneously.Described second lens 122 are also a positive lens.These second lens 122 can be that taper seat is protruding along side in the both sides of the light direction of LED 11, opposite side is taper seat pit, and described taper seat projection is arranged on the side away from LED 11 of these the second lens 122, and taper seat pit is arranged on the side of the close LED 11 of these the second lens 122.The shape of described taper seat pit is as the criterion for non-aggregate light beam to make the emergent light of this taper seat pit.Because the Structure and luminescence principle of LED 11 determined, a branch of light sent by LED 11, the colour temperature of its central light beam is usually high than the colour temperature of edge light beam, if a branch of light sent by LED 11 forms hot spot again after certain lens makes central light beam and edge beam crosses converges, then the center colour temperature of this hot spot can be lower than edge colour temperature, because when converging through the intersection of lens, central light beam and edge light beam intersect convergent point and have carried out mixing at this and cause above-mentioned result.Therefore, in the present embodiment, have the taper seat pit that described emergent light is non-aggregate light beam, and this taper seat pit is arranged on the second lens 122, the phenomenon making the second lens 122 not have intersection convergence produces.And described first lens 121 are a planoconvex spotlight, do not have the phenomenon generation intersecting and converge yet, thus while there is the light-gathering of the LED lamp of set of lenses described in guarantee, can ensure the uniformity of the center colour temperature of its hot spot formed yet.What those skilled in the art were known is, the taper seat of first, second lens 121,122 described is protruding to be expanded by a sphere, in order to make the rising angle of described set of lenses 12 be less than 15 degree, the protruding curvature along the optical axis of first, second lens 121,122 described of taper seat of first, second lens 121,122 described should be 4 to 7.It is well known that each lens has at least one interarea, before explanation interarea, also need the principal point simultaneously explaining lens.Principal point and interarea are all the proprietary terms in perfect optical system, principal point refers to that light is by after this point, in its conjugate space, a pair conjugate point that logitudinal magnification is constant, the face perpendicular to main shaft that these conjugate points are combined to form is called interarea, namely light is propagated between the interarea of two conjugation, and its direction of propagation is necessarily parallel to main shaft.Distance between the respective interarea of described first lens 121, second lens 122 should make the focus of one times of focal length of described set of lenses 12 be positioned at the side with plane of described first lens 121, and described LED 11 should be arranged on one times of focal length of this set of lenses 12, the light sent to make LED 11 forms with the principle of imaging the hot spot that has fine limit.The light having LED lamp 100 outgoing of set of lenses in order to this forms the object that has the hot spot of fine limit, improve utilization rate and the light efficiency of the light that described LED 11 sends to greatest extent simultaneously, the interarea of described second lens 122 to the first lens 121 interarea between more than 90% the entering the first lens 121 or make the planar side of described first lens 121 coning angle received from described LED 11 be light in 170 degree of the distance light that LED 11 should be made to send.Certainly, be understandable that, more than 90% or coning angle of the light sent when LED 11 are that the light in 170 degree enters the first lens 121 and goes out to be shot out from the second lens 122, make the raising of light efficiency also contribute to the formation of the hot spot of described fine limit because hot spot brighter will be higher with the contrast in periphery non-irradiated region.Reaching the method for this object, is exactly by the distance between described second lens 122 of adjustment and the interarea of the first lens 121.Also therefore, described second lens 122 will and the first lens 121 interval arrange.In order to the maximum making the second lens 122 can receive the emergent light from the first lens 121, the clear aperature of the first lens 121 should be made to be less than the clear aperature of the second lens 122.

In the present invention, described LED 11 is a kind of light source 20, however, it is to be understood that, the size of light source and the dimension scale of described set of lenses 12 control in the scope of set of lenses as described in the present embodiment 12 with the dimension scale of LED 11, other lamps, as Halogen lamp LED etc. also can use as light source.The structure and working principle of described LED 11, known by those skilled in the art, does not repeat them here.

Compared with prior art, described have the LED lamp 100 of set of lenses have that set of lenses 12 comprises that two are all positive lens first, second lens 121, 122, and described LED 11 is arranged in the focus of one times of focal length of this set of lenses 12, simultaneously described first, second lens 121, 90% of the light that distance between the interarea of 122 makes LED 11 send enters the first lens 121, thus the light of LED lamp 100 outgoing making this have set of lenses forms the hot spot that has fine limit, the LED lamp 100 having set of lenses when this is used in such as exhibition cabinet, when Jewelry cabinets etc. need to irradiate the occasion of specific region, to greatly improve the article of described irradiation, jewelry is to the product texture of people.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all do in the spirit and principles in the present invention any amendment, equivalent to replace and improvement etc., all should be included in protection scope of the present invention.

Claims

1. one kind has the LED lamp of set of lenses, it comprises the set of lenses that a LED and are arranged on the light direction of this LED, it is characterized in that: described LED is arranged in the focus of one times of focal length of described set of lenses, described set of lenses comprises first lens and second lens, first, second lens described are all positive lens, described first lens are arranged between the second lens and LED, and more than 90% of the light that the interarea of described second lens makes LED send to the distance of the interarea of the first lens enters the first lens.

2. there is the LED lamp of set of lenses as claimed in claim 1, it is characterized in that: described second lens are that taper seat is protruding along the side in the both sides of light direction, and opposite side is taper seat pit.

3. there is the LED lamp of set of lenses as claimed in claim 2, it is characterized in that: the emergent light that described second lens have taper seat pit is non-aggregate light beam.

4. there is the LED lamp of set of lenses as claimed in claim 1, it is characterized in that: described first lens are that taper seat is protruding along the side in the both sides of light direction, and opposite side is plane.

5. there is the LED lamp of set of lenses as claimed in claim 4, it is characterized in that: described LED is arranged on the planar side of described first lens.

6. there is the LED lamp of set of lenses as claimed in claim 4, it is characterized in that: the planar side of the described first lens coning angle received from LED is the light in 170 degree.

7. there is the LED lamp of set of lenses as claimed in claim 4, it is characterized in that: the distance between the principal plane of first, second lens described makes the focus of one of described set of lenses times of focal length be positioned at the planar side of described first lens.

8. there is the LED lamp of set of lenses as claimed in claim 1, it is characterized in that: the side of first, second lens described is that taper seat is protruding, and the protruding curvature along its optical axis of this taper seat is 4 to 7, is less than 15 degree to make the rising angle of described set of lenses.

9. there is the LED lamp of set of lenses as claimed in claim 1, it is characterized in that: the clear aperature of described first lens is less than the clear aperature of the second lens.

10. there is the LED lamp of set of lenses as claimed in claim 1, it is characterized in that: first, second lens separation described is arranged.