CN217875382U

CN217875382U - Light source system

Info

Publication number: CN217875382U
Application number: CN202222197906.XU
Authority: CN
Inventors: 黄文杰; 陈国平
Original assignee: Guangzhou Guanglian Electronic Technology Co ltd
Current assignee: Guangzhou Guanglian Electronic Technology Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-22
Anticipated expiration: 2032-08-19

Abstract

The utility model relates to a light source system, include: the LED light source comprises a substrate provided with an LED luminous body, and a first collimating lens module, a second collimating lens module and a converging lens module which are sequentially arranged in the light emergent direction of the LED luminous body; the first collimating lens module and the second collimating lens module are arranged on the collimating bracket; the second collimating lens module comprises at least two groups of second collimating lens groups with different focal lengths; each group of the second collimating lens groups includes at least one second lens unit; the second lens unit is detachably connected with the collimation bracket. The utility model discloses a second collimating lens module can dismantle second lens unit and collimation support and be connected to realize the adjustment of product parameter. And, the utility model discloses a be equipped with the different second collimating lens group of at least two sets of focuses on the collimation support, can change the illumination ratio of central and border position on the focal plane, change the light distribution on the light source device focal plane to can obtain the facula of equidimension not, the not unidimensional diaphragm hole of adaptation.

Description

Light source system

Technical Field

The utility model relates to an optics technical field, more specifically relates to a light source system.

Background

A conventional light source device includes components including: a substrate, a light emitting unit, a collimating/light receiving system, a converging lens, a housing, etc. The light-emitting units correspond to the collimating/light-receiving systems one by one, and light emitted by the light-emitting units is received and then imaged to a focal plane through the converging lens.

In the light source device, on a collimation/light collection system, once the optical surface parameters of the structure for collimation are determined, the optical surface parameters cannot be changed, flexible adjustment cannot be performed according to requirements, and the focal length of the light source device is fixed, so that a downstream client can only be matched with a diaphragm hole with a fixed size when the light source device is applied, and various application requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned prior art's at least one defect (not enough), provide a light source system for solve the optical surface parameter that current light source device is used for the structure of collimation once the unable change in limit is confirmed, the light source device focus is fixed, can only arrange the fixed dimension's of arranging diaphragm hole, can not satisfy the problem of multiple application demand.

The utility model adopts the following technical scheme:

a light source system, comprising: the LED light source comprises a substrate provided with an LED luminous body, and a first collimating lens module, a second collimating lens module and a converging lens module which are sequentially arranged in the light emergent direction of the LED luminous body; the first collimating lens module and the second collimating lens module are arranged on the collimating bracket; the second collimating lens module comprises at least two groups of second collimating lens groups with different focal lengths; each set of the second collimating lens groups includes at least one second lens unit; the second lens unit is detachably connected with the collimation bracket.

In one embodiment, the collimating bracket is provided with a plurality of light holes, the first collimating lens module comprises at least one first lens unit, the first lens unit is arranged in the light holes, and the second lens unit is arranged outside the light holes and is in one-to-one correspondence with the first lens unit.

In one embodiment, the second lens units are arranged in a polygon shape and satisfy

Wherein d is a distance between opposite sides of the second lens unit,

the maximum outer diameter of the second lens unit.

In one embodiment, the collimating holder is provided with a boss for positioning the second lens unit.

In one embodiment, the boss is provided at a corner of the second lens unit.

In one embodiment, the bosses are arranged in a triangular shape.

In one embodiment, the corners of the second lens unit are rounded.

In one embodiment, the second lens units are arranged in a regular hexagon or a regular hexagon-like manner, and the second lens units in the second collimating lens module are arranged in a honeycomb manner.

In one embodiment, the second collimating lens group comprises a focal length f _A And a first focal length of the lens group f _B A second focal length lens group of (1); the first focal length lens group is positioned in the middle position, and the second focal length lens group is arranged at the periphery of the first focal length lens group; wherein f is _A ＞f _B 。

In one embodiment, a center thickness of a second lens unit in the first focal length lens group is greater than a center thickness of a second lens unit in the second focal length lens group; and/or a ratio of a center thickness to an edge thickness of the second lens unit is greater than 2.5. Further, the ratio of the center thickness to the edge thickness of the second lens unit is 2.5 to 4.

Compared with the prior art, the beneficial effects of the utility model include at least:

the light beam that this technical scheme's LED luminous element sent is through the receipts light collimation back of first collimating lens module and second collimating lens module, and the light-emitting is assembled through the convergent lens again. This technical scheme's second collimating lens module is different with traditional moulded lens that adopts integrated into one piece, and this technical scheme's second collimating lens module can dismantle second lens unit and collimation support to the second lens unit that every solitary luminescence unit corresponds in the realization LED luminous element all sets up alone, with the adjustment of realizing the product parameter, and needn't be limited to the restriction of integrative moulded. The edge thickness, the center thickness, and the like of the individual second lens units can be freely designed and combined or replaced as desired. And, be equipped with the different second collimating lens group of at least two sets of focuses on this technical scheme's the collimating holder, can set up in order to carry out the mixed arrangement of the second collimating lens group more than two kinds or two kinds according to the demand, through the collocation of length focus, can change the illumination ratio of central and marginal position on the focal plane, change the light distribution on the light source device focal plane to can obtain the not unidimensional facula of equidimensional, the not unidimensional diaphragm hole of adaptation.

Drawings

Fig. 1 is an exploded view of a light source system according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a second lens unit according to an embodiment of the present invention.

Fig. 3 is a schematic view of a partial structure according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a collimating bracket according to an embodiment of the present invention.

Fig. 5 is a schematic view of a partial assembly according to an embodiment of the present invention.

Reference numerals are as follows: 10. a substrate; 11. an LED light emitter; 20. a first collimating lens module; 30. a second collimating lens module; 31. a second lens unit; 32. a first focal length lens group; 33. a second focal length lens group; 40. a collimating holder; 41. a light-transmitting hole; 42. a boss; 50. a converging lens module; 51. a converging lens; 52. pressing a ring; 60. a housing; 70. and a gasket.

Detailed Description

The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

A light source system as shown in fig. 1, comprising: the LED light source comprises a substrate 10 provided with an LED light emitting body 11, and a first collimating lens module 20, a second collimating lens module 30 and a converging lens module 50 which are sequentially arranged in the light emitting direction of the LED light emitting body 11; the first collimating lens module 20 and the second collimating lens module 30 are both arranged on the collimating bracket 40; the second collimating lens module 30 includes at least two groups of second collimating lens groups with different focal lengths; each set of the second collimating lens groups includes at least one second lens unit 31; the second lens unit 31 is detachably attached to the collimating holder 40.

The light beam emitted by the LED light emitting body 11 of this embodiment is collimated by the first collimating lens module 20 and the second collimating lens module 30, and then converged by the converging lens. The second collimating lens module 30 of this embodiment is different from a conventional molded lens that is integrally molded, and the second collimating lens module 30 of this embodiment detachably connects the second lens unit 31 to the collimating holder 40, so that the second lens unit 31 corresponding to each individual light-emitting unit in the LED light-emitting body 11 is separately disposed, and adjustment of product parameters is achieved without limitation to limitation of integral molding. The edge thickness, the center thickness, and the like of the single second lens unit 31 can be freely designed and combined or replaced as desired. And, the last second collimating lens group that is equipped with two sets of at least focuses difference of collimation support 40 of this embodiment, can carry out the mixed arrangement setting of two kinds or more than two kinds of second collimating lens group according to the demand, with the combination of first collimating lens module 20, can obtain the collimating system including at least two sets of different combination focuses, collocation through the collocation of long and short focuses, can change the illumination ratio of center and marginal position on the focal plane, change the light distribution on the light source device focal plane, thereby can obtain the facula of equidimension not, the not unidimension diaphragm hole of suitability.

In this embodiment, the collimating bracket 40 is provided with a plurality of light holes 41, the first collimating lens module 20 includes at least one first lens unit, the first lens unit is disposed in the light hole 41, and the second lens unit 31 is disposed outside the light hole 41 and is disposed in a one-to-one correspondence with the first lens unit. In the present embodiment, the first lens unit of the first collimating lens module 20 and the second lens unit 31 of the second collimating lens module 30 are mounted by one collimating holder 40.

Specifically, the LED light emitting body 11 of the present embodiment is LED lamp beads, and the first lens unit and the second lens unit 31 are both in number matching with the LED lamp beads and are disposed in a one-to-one correspondence manner.

In the optical system, the object height/collimation focal length = image height/condenser focal length, when the object height and the condenser focal length are not changed, then the collimation focal length changes, then corresponding image height can be changed in the opposite direction, for a single LED lamp bead, the longer the combined focal length of the corresponding first collimating lens module 20 and the second collimating lens module 30, the smaller the image formed on the module focal plane, the smaller the applicable diaphragm hole, no margin, and the dark-edge condition can be caused. But the smaller the spot diameter (the smaller the image), the higher the central illuminance. Therefore, the collimating lens groups with two different combined focal lengths are arranged on the second collimating lens module 30 to realize the collocation of the long focal length and the short focal length, so that the illumination ratio of the center and the edge position on the focal plane can be changed, and the light distribution on the focal plane of the light source module can be changed by changing the quantity collocation and the position distribution of the collimating lens groups with different combined focal lengths.

As shown in fig. 2, the second lens unit 31 of the present embodiment is polygonal, and satisfies the following condition

Where d is the distance between opposite sides of the second lens unit 31,

which is the maximum outer diameter of the second lens unit 31. Taking this embodiment as an example, the second lens unit 31 is disposed in a regular hexagon or a quasi-regular hexagon, the distance between opposite sides of the regular hexagon is d, and the maximum outer diameter within the above range

Most of the light beams which can be received by the second lens unit 31 are contained, the smaller d is, the less the luminous flux of the emergent light is, but the closer the adjacent collimated light beams are, the higher the overall light beam plumpness is, so that the light flux and the light beam plumpness can be considered when d is set within the range.

As shown in fig. 3 to 4, the collimating holder 40 according to the present embodiment is provided with a boss 42 for positioning the second lens unit 31, and the collimating lens unit is not detached or displaced by the boss 42.

In this embodiment, the bosses 42 are disposed at the corners of the second lens unit 31, and each of the corners is provided with a boss 42. Specifically, the collimator lens unit of the present embodiment is arranged in a hexagonal shape, and the bosses 42 are arranged at six corners of the collimator lens unit, and the second lens unit 31 is pressed in the region surrounded by the bosses 42. Also, since the present embodiment further includes the light transmission hole 41, the boss 42 is disposed around the periphery of the light transmission hole 41.

In this embodiment, the second lens units 31 are disposed in a regular hexagon shape, and the second lens units 31 in the second collimating lens module 30 are disposed in a honeycomb arrangement. That is, each side of the second lens unit 31 is closely attached to the adjacent second lens unit 31.

In addition, the corners of the second lens units 31 are connected in a smooth transition manner in this embodiment, on one hand, after the corners of the smooth transition connection are spliced in a honeycomb arrangement of the second lens units 31, enough margin is left at the splicing position for dispensing and arranging the boss 42, so that the boss 42 can be smoothly arranged at the corner position and enough dispensing position is reserved, and on the other hand, the area of the second lens units 31 can be as large as possible, thereby improving the light-receiving rate.

In addition, the bosses 42 of the present embodiment are arranged in a triangular shape, that is, one boss 42 can position three second lens units 31 arranged around three sides of the boss 42, so that each surface of the boss 42 can exert a positioning effect, and the number of the bosses 42 is reduced by sharing the boss 42, thereby achieving a compact structure and a reduced manufacturing cost.

The value of the opposite side distance d in the embodiment depends on the comprehensive consideration of the light emitting efficiency, the module volume, the light emitting beam plumpness and the size of the boss 42, and can be set according to the actual condition.

In this embodiment, the second collimating lens groups are two groups, and the focal length of each of the two groups is f _A And a first focal length lens group 32, and a focal length f _B The second focal length lens group 33; the first focal length lens group 32 is located at the middle position, and the second focal length lens group 33 is arranged at the periphery of the first focal length lens group 32; wherein f is _A ＞f _B 。

On the one hand, because the first collimating lens module 20, the second collimating lens module 30 and the converging lens module 50 can not achieve the effect of an ideal lens, certain spherical aberration and aberration inevitably exist on the focal plane, and the farther away from the optical axis of the converging lens module 50, the larger the spherical aberration and the aberration are, the larger the light spot can be deformed and enlarged. Therefore, the first focal length lens group 32 with a larger focal length is arranged in the middle of the module and is closer to the optical axis of the converging lens assembly, so that the effect of small light spots formed by the first focal length lens group 32 with a larger focal length on the focal plane is better, and the central illumination on the focal plane is higher.

On the other hand, each module is usually used with a focus fixing or zoom lens, and the lens may not completely receive the light emitted from the converging lens module 50 in the light receiving angle, in this case, the light beams emitted from the LED beads and the collimating lens located at the edge have partial loss, and the light beams located at the central area have no loss, so that the first focal length lens group 32 with a larger focal length is disposed at the central area, and the central illuminance and the light efficiency utilization rate of the light beams emitted after passing through the focus fixing or zoom lens can be ensured.

The center thickness of the second lens unit 31 in the first focal length lens group 32 is larger than the center thickness of the second lens unit 31 in the second focal length lens group 33 in the present embodiment. The second lens unit 31 in this embodiment is a plano-convex aspheric lens, and due to the law of optical design, on the premise that the installation position of the second collimating lens group is fixed, in order to ensure the collimating effect, the longer the focal length is, and the thicker the center thickness is.

The thickness ratio of the center thickness to the edge thickness of the second lens unit 31 of the present embodiment is greater than 2.5. In the production and manufacturing of the traditional integrally formed molded lens, if the difference between the central thickness and the edge thickness is too large, the risk of crushing after compression molding treatment exists, and the strength cannot be ensured; secondly, the connection between the units needs to be considered in the integral forming, and if the surface type difference is too large, the grinding tool at the connection part between the units is difficult to manufacture, and the collimation effect is poor. In the embodiment, the second lens unit 31 includes at least lens units with different focal lengths, each second lens unit can be freely assembled, the limitation on the edge thickness and the center thickness is small, the design freedom is high, the combined light emitting effect is better, and the strength problem at the spliced part of the units does not need to be considered. Further, the ratio of the center thickness to the edge thickness of the second lens unit is 2.5 to 4.

Specifically, the center thickness of the second lens unit 31 in the first focal length lens group 32 of the present embodiment is 4.9mm, and the edge thickness is 1.7mm; the center thickness of the second lens unit 31 in the second focal length lens group 33 is 3.9mm, the edge thickness is 1.0mm, and the combined light emitting effect is good. On the contrary, if the two lens groups are integrally molded into a molded lens, the process difficulty is very high, and the strength of the unit splicing part is insufficient.

As shown in fig. 5, in the present embodiment, a distance between the light incident surface of the first collimating lens module 20 and the light incident surface of the second collimating lens module 30 is L, that is, a distance between the bottom surface of the first collimating lens module 20 and the bottom surface of the second collimating lens module 30 is L, and a center thickness of the first collimating lens module 20 is t; wherein t is less than L, thereby the first collimating lens module 20 has enough installation space and can not generate extrusion due to installation and assembly.

The present embodiment further includes a housing 60, which is used to encapsulate the LED light emitting device 11, the first collimating lens module 20, the second collimating lens module 30, and the converging lens module 50, and is engaged with the substrate 10, and the light source modules are integrated through the housing 60.

In this embodiment, a sealing gasket 70 is disposed between the substrate 10 and the housing 60, and the sealing gasket 70 may be a silicone sealing gasket 70 or a rubber sealing gasket 70 or other materials capable of sealing, so as to ensure the sealing performance of the light source system.

The convergent lens module 50 of the present embodiment includes a convergent lens 51, and a pressing ring 52 for fixing the convergent lens 51 to the housing 60, wherein the pressing ring 52 is in threaded connection with the housing 60. Specifically, the press ring 52 is provided with external threads, and the housing 60 is provided with internal threads.

The present embodiment exemplifies the above by specific examples:

the number of the LED lamp beads of this embodiment is 12, and the second collimating lens module 30 includes a first focal length collimating lens group and a second focal length collimating lens group 33, wherein the first focal length collimating lens group 32 includes 6 second lens units 31, and the second focal length collimating lens group 33 includes 6 second lens units 31 different from those of the first focal length collimating lens group 32. The focal length f formed by the first focal length lens set 32 and the first lens unit correspondingly disposed in the first collimating lens module ₁ =4.68mm, focal length f formed by the second focal length lens group 33 and the first lens unit correspondingly arranged in the first collimating lens module ₂ =4.00mm, the focal length of the converging lens is F =36.1mm, the light emitting surface of the led lamp bead is a circle with a diameter a =1.7mm, the corresponding light spot on the focal plane of the module is a circle, the diameter X = a/F × F, and the diameter of the light spot corresponding to the first focal lens group 32 is X ₁ =13.1mm, and the diameter of the corresponding light spot of the second focal length lens group 33 is X ₂ ＝15.3mm。

In this embodiment, when the aperture is fixed to 13mm, when all the second collimating lens modules 30 use the first focal length lens group 32, the light spot has no margin with respect to the aperture Kong Guoxiao, which may cause a dark edge condition, and when all the second collimating lens modules 30 use the second focal length lens group 33, although the light spot size margin is satisfied, the central illuminance is relatively low; the first focal length lens group 32 and the second focal length lens group 33 are used in combination, so that the marginal margin can meet the use requirement under the condition of high central illumination.

This embodiment to different lamp pearl quantity, the not LED module of equidimension, can general first collimating lens module 20 and second collimating lens module 30, need not to relapse mould sinking preparation not unidimensional integrated into one piece mould pressing lens many times.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A light source system, comprising: the LED light source comprises a substrate provided with a plurality of LED light emitting bodies, and a first collimating lens module, a second collimating lens module and a converging lens module which are sequentially arranged in the light emitting direction of the LED light emitting bodies; the first collimating lens module and the second collimating lens module are arranged on the collimating bracket; the second collimating lens module comprises at least two groups of second collimating lens groups with different focal lengths; each set of the second collimating lens groups includes at least one second lens unit; the second lens unit is detachably connected with the collimation bracket.

2. The light source system of claim 1, wherein the collimating bracket has a plurality of light holes, the first collimating lens module comprises at least one first lens unit, the first lens unit is disposed in the light hole, and the second lens unit is disposed outside the light hole and is disposed in a one-to-one correspondence with the first lens unit.

3. The light source system of claim 2, wherein the second lens unit is disposed in a polygon shape

Wherein d is a distance between opposite sides of the second lens unit,

is the maximum outer diameter of the second lens unit.

4. The light source system of claim 3, wherein the collimating holder has a boss thereon for positioning the second lens unit.

5. The light source system of claim 4, wherein the boss is disposed at a corner of the second lens unit.

6. The light source system of claim 5, wherein the bosses are arranged in a triangular configuration.

7. The light source system of claim 5, wherein corners of the second lens unit are rounded.

8. The light source system of claim 3, wherein the second lens units are disposed in a regular hexagon or a regular hexagon-like arrangement, and each second lens unit in the second collimating lens module is disposed in a honeycomb arrangement.

9. The light source system of any of claims 1-8, wherein the second collimating lens group comprises a focal length f _A And a first focal length of the lens group f _B A second focal length lens group of (1); the first mentionedThe second focal length lens group is arranged at the periphery of the first focal length lens group; wherein f is _A ＞f _B 。

10. The light source system according to claim 9, wherein a center thickness of the second lens unit in the first focal length lens group is larger than a center thickness of the second lens unit in the second focal length lens group; and/or a ratio of a center thickness to an edge thickness of the second lens unit is greater than 2.5.