CN202675155U - Dodging device and light source system - Google Patents
Dodging device and light source system Download PDFInfo
- Publication number
- CN202675155U CN202675155U CN 201220287513 CN201220287513U CN202675155U CN 202675155 U CN202675155 U CN 202675155U CN 201220287513 CN201220287513 CN 201220287513 CN 201220287513 U CN201220287513 U CN 201220287513U CN 202675155 U CN202675155 U CN 202675155U
- Authority
- CN
- China
- Prior art keywords
- curved surface
- light source
- incident
- light
- ray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model provides a dodging device and a light source system comprising the dodging device, wherein the dodging device is used for shaping incident rays generated by a point light source. The illuminance distribution of light spots formed on a random plane perpendicular to the central axis of the point light source by the incident rays of the point light source is weakened outward from the center of the plane. The dodging device is characterized by at least comprising a dodging lens, and the dodging lens comprises a first curved surface and a second curved surface. The first curved surface is used to receive emergent rays of the point light source and change the transmitting direction of the emergent rays, and therefore the emergent rays of the point light source are enabled to intersect at one point, or the straight lines where the emergent rays are located intersect at one point, and then the emergent rays are emitted to the second curved surface. The second curved surface is a free-form surface which is used to receive the incident rays reflected by the first curved surface, the second curved surface is formed through deformation of a standard curved surface which is located at a preset position on the central axis direction of the point light source, and the second curved surface can be used for shaping the incident rays to form even light distribution or illuminance distribution. By means of the dodging device and the light source system, good shaping effect can be achieved.
Description
Technical field
The utility model relates to illumination and Display Technique field, particularly relates to a kind of dodging device and light-source system.
Background technology
The light source such as semiconductor laser, LED is widely used in the fields such as illumination, projection, optics phototypesetting, optical storage.In these are used, light source need to be formed a certain size on objective plane as far as possible, have the Illumination Distribution of regular shape, distribute such as rectangular uniform.
And light source commonly used, such as semiconductor laser, LED, the maximum length of its light-emitting area all less than with the area of 1/10th and this light-emitting area of adjacent optical elements less than 1/10th of adjacent ray element area, can regard approx spot light as, it is all not ideal enough that but its light distributes, be generally oval Gauss such as the light distribution of semiconductor laser on the cross section, light on its major axis and the minor axis distributes as shown in Figure 1, the light distribution of light emitting diode on the cross section is generally bell, and the light on the cross section distributes as shown in Figure 2.
There is document to propose to solve the method that the pairing approximation spot light carries out shaping based on fly's-eye lens (paper Laser Beam Shaping Techniques).Be illustrated in fig. 3 shown below: the collimated light beam that is of a size of D incides the fly's-eye lens pair that comprises two fly's-eye lenses, fly's-eye lens is to utilizing lenticule 11,12 wherein that light beam is divided into several beamlets, each beamlet is processed respectively with a pair of lenticule 11,12, the formation rectangular light distributes, and because the beamlet area is very little, the light in this rectangle distributes and approaches evenly.The last normal lens 13 that is F through a focal length again, beamlet superposes at objective plane, thereby obtains uniform illumination in being of a size of the rectangle of S.This method is very high to requirement on machining accuracy, and the light between the lenticule 11,12 has certain crosstalking, cause and occur the secondary lobe hot spot on the objective plane, convergence part branch between each lenticule in each fly's-eye lens affects the outgoing of light in addition, these all cause the reduction of light utilization efficiency, so that shaping effect is relatively poor.
The utility model content
The technical problem that the utility model mainly solves provides a kind of dodging device and light-source system, can solve the relatively poor problem of the shaping effect of spot light outgoing beam.
The utility model provides a kind of dodging device, incident ray shaping to the light source generation, light source is 1/10th of the maximum length of the light-emitting area surface area that receives the light source incident light less than or equal to the area of the light-emitting area of 1/10th and this light source of the distance of this light source and adjacent optical elements less than adjacent optical elements, this light source is approximate spot light, and the incident ray of light source weakens outside by mediad in the Illumination Distribution of the hot spot that the arbitrary plane vertical with the central shaft of this light source forms, dodging device is characterised in that, dodging device comprises even optical lens at least, and this even optical lens comprises:
First surface, this first surface receives the emergent ray of light source and changes its direction of propagation, so that the emergent ray of light source meets at a bit or emergent ray place straight line intersects at a point, this point is the imaging point of light source;
The second curved surface, the incident ray of this second curved surface is the light from the first surface outgoing, described the second curved surface is free form surface, and is obtained by a standard surf deform in the precalculated position of the central axis direction that is positioned at light source, and this standard curved surface is for being shaped as to incident ray the curved surface of directional light;
Except central axis direction, direction along the side direction from this central shaft to central shaft, the difference of incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray keeps jack per line, the absolute value monotonic increase of the difference of incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray, and the rate of change of the absolute value of the difference of this incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray successively decreases, so that the emergent ray of the second curved surface has more uniform light distribution at predetermined solid angle internal ratio incident ray.
The utility model also provides a kind of dodging device, incident ray shaping to the light source generation, light source is 1/10th of the maximum length of the light-emitting area surface area that receives the light source incident light less than or equal to this light source to the area of the light-emitting area of 1/10th and this light source of the distance of adjacent optical elements less than adjacent optical elements, this light source is approximate spot light, and the incident ray of light source weakens outside by mediad in the Illumination Distribution of the hot spot that the arbitrary plane vertical with the central shaft of this light source forms, dodging device is characterised in that, dodging device comprises even optical lens at least, and this even optical lens comprises:
First surface, this first surface receives the emergent ray of light source and changes its direction of propagation, so that the emergent ray of light source meets at a bit or emergent ray place straight line intersects at a point, this point is the imaging point of light source;
The second curved surface, the incident ray of this second curved surface is the light from the first surface outgoing, described the second curved surface is free form surface, and obtained by a standard surf deform in the precalculated position of the central axis direction that is positioned at light source, this standard curved surface is for converging at incident ray the curved surface of the central point of presumptive area;
Except central axis direction, direction along the side direction from this central shaft to central shaft, the difference of incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray keeps jack per line, the absolute value monotonic increase of the difference of incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray, and the rate of change of the absolute value of the difference of this incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray successively decreases, so that the emergent ray of the second curved surface has more uniform Illumination Distribution at presumptive area internal ratio incident ray.
The utility model also provides a kind of light-source system, and this light-source system comprises above-mentioned dodging device.
Compared with prior art, the utility model comprises following beneficial effect:
In the utility model, the second curved surface is by on the basis of standard curved surface, adopting deformation rule in the technique scheme to be out of shape obtains, the incident ray that this free form surface can weaken the Illumination Distribution of the first hot spot outward by mediad is shaped to has more uniform light intensity or Illumination Distribution, first surface is rear so that emergent ray intersects at a point or the straight line at emergent ray place intersects at a point to the emergent ray refraction of spot light, what be equivalent to the reception of the second curved surface is the emergent light of a spot light, thereby so that the shaping effect of the second curved surface is better.With respect to prior art, free form surface of the present utility model need not a plurality of lenticules and forms, thereby can avoid above-mentioned crosstalking to wait the problem of the light utilization efficiency reduction that causes, have simple in structure, the advantage that shaping effect is good.
Description of drawings
Fig. 1 is that semiconductor laser is at the major axis on the objective plane and the light distribution map on the minor axis;
Fig. 2 is that light emitting diode is at the major axis on the objective plane and the light distribution map on the minor axis;
Fig. 3 is the index path of the fly's-eye lens of prior art;
Fig. 4 a is the structural representation of an embodiment of the utility model dodging device;
Fig. 4 b is the first surface imaging schematic diagram of the even optical lens shown in Fig. 4 a;
Fig. 4 c is the light path schematic diagram of the second curved surface of the even optical lens shown in Fig. 4 a;
Fig. 4 d is the principle analysis figure of the second curved surface in Fig. 4 c illustrated embodiment;
Fig. 5 a is the structural representation of another embodiment of the utility model dodging device;
Fig. 5 b is the light path schematic diagram of the second curved surface of the even optical lens shown in Fig. 5 a;
Fig. 6 a is the structural representation of another embodiment of the utility model dodging device;
Fig. 6 b is the first surface imaging schematic diagram of the even optical lens shown in Fig. 6 a;
Fig. 7 a is the structural representation of another embodiment of the utility model dodging device;
Fig. 7 b is the light path schematic diagram of the optical directory means shown in Fig. 7 a;
Fig. 8 is the schematic diagram of rectangle solid angle.
The specific embodiment
Below in conjunction with drawings and embodiments the utility model embodiment is elaborated.
Technical term is explained:
The rectangle solid angle: as shown in Figure 8, excessively on the vertical line of rectangle ABCD central point 1 O is arranged, the solid angle that rectangle ABCD opens an O is a rectangle solid angle;
The big angle of rectangle solid angle: as shown in Figure 8, connect the angle that the line segment of the mid point of the mid point of wide AB and wide CD is opened an O;
The little angle of rectangle solid angle: as shown in Figure 8, the angle that the line segment of the mid point of the long AD of connection and the mid point of long BC is opened an O;
Illumination: the luminous flux of unit are;
Light intensity: the luminous flux in the unit solid angle.
Embodiment one
Fig. 4 a is the structural representation of an embodiment of the utility model dodging device.Shown in Fig. 4 a, the incident ray shaping that 220 pairs of light sources of dodging device 210 produce, this dodging device 220 includes only even optical lens, and this even optical lens comprises first surface 221 and the second curved surface 222.
Shown in Fig. 4 a, the first surface 221 of even optical lens 220 is the sphere of indent, and this first surface 221 receives the emergent ray of light source 210, and changes the direction of propagation of incident light, so that the reverse extending line of the emergent ray of light source 210 meets at a bit, this point is the imaging point 230 of light source 210.The virtual image that the imaging point 230 here becomes for light source 210 transmission first surfaces 221 rear light reverse extending lines.The position of the imaging point 230 in the present embodiment is that the change in location according to first surface 221 and light source 210 changes.In the present embodiment first surface 221 as sphere as example, Fig. 4 b is the first surface imaging schematic diagram of the even optical lens shown in Fig. 4 a, shown in Fig. 4 b, imaging point 230 is approximately image distance v with the distance of first surface 221, light source 210 is approximately object distance u (u＞0) with the distance of first surface 221, the focal length of first surface 221 is f (for concave mirror, f＜0), by the lens imaging formula
As can be known,
It is v＜0, therefore when first surface is concave surface, imaging point 230 can only be the virtual image, namely by the focal length of adjustment first surface and the relative position of light source 210 and first surface 221, imaging point 230 can be positioned at any point before the first surface 221, for example in the present embodiment, imaging point 230 is between light source 210 and first surface 221.Certainly will consider in practice the degree of divergence of light source 210 emergent raies, first surface 221 will satisfy the reception with light source 210 most emergent raies, and light source 210 will satisfy the condition of approximate spot light.
In other embodiment of the present utility model, first surface 221 also can be aspheric surface, such as ellipsoid, parabola, hyperboloid etc.; First surface 221 can also be free form surface.For aspheric surface and free form surface, similar with sphere, satisfy equally above-mentioned imaging law, by the design to first surface 221, the light of light source 210 outgoing is after this first surface 221 changes the direction of propagation, and the reverse extending line of this emergent ray intersects at a point.At sphere, among aspheric surface and the free form surface three, the easiest processing of sphere, its processing cost is minimum, but its shaping effect is poorer than other two kinds of curved surfaces, and being adapted to the plastic precision requirement is not in the very high situation; Free form surface can be realized more accurate control to incident ray, and shaping effect is best, but its difficulty of processing is larger, so cost is the highest, is mainly used in the situation that plastic precision is had relatively high expectations; Aspheric Cost And Performance is all between sphere and free form surface.
The second curved surface 222 is the shaping curved surface, and it receives from the incident ray of first surface 221 refractions and carries out shaping, and this second curved surface 222 is free form surface.In the present embodiment, first surface 221 is so that meet at a bit from the reverse extending line of the incident ray of this first surface 221 refractions, therefore the light that incides the second curved surface is equivalent to the light that sends from a spot light, and this moment, free form surface 222 had preferably shaping effect.In other embodiment of the present utility model, as long as the straight line from the ray intersection of first surface outgoing in any or its place intersects at a point, be imaging point, at this moment, the light that incides the second curved surface just is equivalent to from the light source outgoing take imaging point as spot light.For spot light, each point receives at most the incident ray of a spot light on the second curved surface, therefore the second curved surface can be realized the accurate control to every light of spot light, shaping is more accurate, and for non-spot light, the point on the second curved surface may receive many light, and what namely receive is light beam, be difficult to accurately to control the exit direction of all light of this point of incident, the light outgoing of therefore inciding the second curved surface 222 then can improve the shaping effect of the second curved surface 222 from spot light.
See also Fig. 4 c and Fig. 4 d, Fig. 4 c is the index path at the second curved surface 222 places in the present embodiment, and Fig. 4 d is the principle analysis figure of the second curved surface 222 in Fig. 4 c illustrated embodiment.
Shown in Fig. 4 c, in the present embodiment, imaging point 230 can be regarded a spot light as, is equivalent to its generation incident ray and is incident to the second curved surface 222.Curved surface 222a is the standard curved surface that is deformed into the second curved surface 222, and curved surface 222b and curved surface 222c are the form by two kinds of free form surfaces of the second curved surface 222 of standard curved surface 222a distortion.The incident ray that light source 210 produces forms the first hot spot on a plane vertical with the central shaft of this imaging point 230, and the Illumination Distribution of the first hot spot is weakened outward by mediad, and the light that therefore can regard imaging point 230 outgoing as also is same the distribution.
Curved surface 222b (or 222c) is obtained by the standard curved surface 222a distortion in the precalculated position of the central axis direction that is positioned at imaging point 230, and this standard curved surface is for being shaped as to the incident ray that imaging point 230 produces the curved surface of directional light.The precalculated position from light source more away from, the size of free form surface is larger, cost of manufacture is higher; The precalculated position from light source more close to, the size of free form surface is less, manufacture difficulty is higher, thereby the precalculated position can arrange according to the actual requirements.About the standard curved surface, be specially the ellipsoid that can be shaped as to the incident ray that light source 210 produces directional light in the present embodiment.
For curved surface 222b, present embodiment carries out following restriction: except the central axis direction of imaging point 230, direction along the side direction from this central shaft to central shaft (comprises the direction from a to b, or from the direction of a to c), the difference of incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222b and this incident ray that imaging point 230 produces keeps jack per line (be specially and all keep positive sign), the absolute value monotonic increase of the difference of incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222b and this incident ray that imaging point 230 produces, and the rate of change of the absolute value of the difference of this incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222b and this incident ray successively decreases, so that the emergent ray of curved surface 222b has more uniform light distribution at the incident ray that predetermined solid angle internal ratio imaging point 230 produces.For example, along from the direction of a to b and from the direction of a to c, the difference of incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222b and this incident ray that imaging point 230 produces increases progressively continuously by 1 degree to 10 degree, and this speed that increases progressively reduces gradually.
For curved surface 222c, present embodiment carries out following restriction: except the central axis direction of imaging point 230, direction along the side direction from this central shaft to central shaft (comprises the direction from d to e, or from the direction of d to f), the difference of incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222c and this incident ray that imaging point 230 produces keeps jack per line (be specially and all keep negative sign), the absolute value monotonic increase of the difference of incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222c and this incident ray that imaging point 230 produces, and the rate of change of the absolute value of the difference of this incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222c and this incident ray successively decreases, so that the emergent ray of curved surface 222c has more uniform light distribution at the incident ray that predetermined solid angle internal ratio imaging point 230 produces.For example, along from the direction of d to e and from the direction of d to f, the difference of incident ray incident angle on standard curved surface 222a at the incident angle on the curved surface 222c and this incident ray that imaging point 230 produces is successively decreased continuously by-1 degree to-10 degree, and this speed of successively decreasing reduces gradually.
Predetermined solid angle can be according to different demand settings.For example, predetermined solid angle can for 45 degree with interior cone angle, also can 30 degree with interior cone angle.Predetermined solid angle can be the cone angle of the taper of rectangle for the bottom surface, can be the cone angle of orthohexagonal taper for the bottom surface also.
The emergent ray of curved surface 222b (or 222c) has more uniform light distribution at the incident ray that predetermined solid angle internal ratio imaging point 230 produces, and refers to that the light intensity uniformity of emergent ray in predetermined solid angle of curved surface 222b (or 222c) is higher than the light intensity uniformity of incident ray in predetermined solid angle that imaging point 230 produces.The light intensity uniformity in the predetermined solid angle can adopt various ways to represent, for example, can be the light intensity minimum of a value in the predetermined solid angle and the ratio of the light intensity mean value in the predetermined solid angle; Also can be scheduled to the ratio of the interior light intensity maximum of solid angle and the light intensity mean value in the predetermined solid angle; Also can be the ratio of the difference of the light intensity mean value in the predetermined solid angle and the light intensity maximum in the predetermined solid angle and light intensity minimum of a value; Do not enumerate one by one herein.
For ease of understanding, below present embodiment mean camber 222c is realized that the principle of the higher light intensity uniformity analyzes; Simultaneously, for ease of describing, below with the side direction of central shaft referred to as side:
Shown in Fig. 4 c and Fig. 4 d, standard curved surface 222a is shaped to directional light with the incident ray that imaging point 230 sends, and namely all emergent raies of standard curved surface 222a are distributed in the 0 degree solid angle.Therefore, curved surface 222c changes the incidence angle of incident ray, will make corresponding emergent ray depart from 0 degree; The change amount (absolute value) of incidence angle increases progressively to side from the central shaft of light source, for example change amount is followed successively by 20 degree and 30 degree, then from the central shaft of light source to side, the emergent ray of curved surface 222c and 0 departing from also of degree increase progressively, thereby the emergent ray of curved surface 222c is distributed in the predetermined solid angle; When the light distribution of the incident ray that produces when imaging point 230 is successively decreased from central shaft to side, can successively decrease to the rate of change of the change amount of this incident ray incidence angle by making curved surface 222c, improve the uniformity of the light distribution of emergent ray in predetermined solid angle of curved surface 222c.
For example, for simplifying problem description, make an explanation with two-dimensional case, this moment, solid angle was reduced to angle, simultaneously, and can be with the approximate change amount that is considered as the incident ray incidence angle of curved surface 222c of Angulation changes amount of the emergent ray of curved surface 222c.Shown in Fig. 4 d, the incident ray that light source produces is distributed in the 0-40 degree, and the predetermined angular of the emergent ray of curved surface 222c is in the 0-30 degree.Because the incident ray that light source produces is larger in the light intensity of the central axis of light source, for example, the luminous flux of this incident ray in the 0-20 degree is 2 times of luminous flux in the 20-40 degree.For emergent ray light intensity in the 0-30 degree of making curved surface 222c even, so, emergent ray corresponding to incident ray in the 0-20 degree should be distributed in the 0-20 degree, namely the emergent ray corresponding to incident ray of 20 degree should depart from central axis direction 20 degree, and emergent ray corresponding to the incident ray of 20-40 degree should be distributed in the 20-30 degree, and namely the emergent ray of the incident ray of 40 degree departs from central shaft 30 degree.Therefore, the incidence angle variable quantity of incident raies of 20 degree is 20, and because the incidence angle variable quantity of the incident ray of 0 degree is 0, then the average rate of change of the incidence angle converted quantity of the interior incident ray of 0-20 degree is about (20-0)/(20-0)=1; The incidence angle variable quantity of the incident ray of 40 degree is 30, the incidence angle variable quantity of the incident raies of cause 20 degree is 20, then the average rate of change of the incidence angle variable quantity of 20-40 degree incident ray is about (30-20)/(40-20)=0.5, be the incidence angle converted quantity of incident ray in the 0-20 degree the average rate of change 1/2.This shows, can successively decrease to the rate of change of the change amount of this incident ray incidence angle by making curved surface 222c, improve the uniformity of the light distribution of emergent ray in predetermined solid angle of curved surface 222c.
Be understood that easily, the above-mentioned rate of change degree difference of successively decreasing, the uniformity of the light distribution of the emergent ray of curved surface 222c in predetermined solid angle is also different, and those skilled in the art can be according to inhomogeneity different requirements, determines the degree of successively decreasing of this rate of change by emulation experiment etc.What deserves to be explained is, when rate of change successively decreases degree when excessive, can cause emergent ray light intensity in polarizers of big angle scope of curved surface 222c large, light intensity is little in the small angle range, and cause the light distribution of the incident ray that produces than light source more inhomogeneous, thereby the degree of successively decreasing of above-mentioned rate of change need control within the specific limits, and certainly, these those skilled in the art also can determine by emulation experiment at an easy rate.
The principle of the light intensity uniformity that curved surface 222b realization is higher is identical with curved surface 222c's, no longer analyzes herein.
In the present embodiment, the second curved surface 222 is for passing through on the basis of standard curved surface, adopt the deformation rule in the technique scheme to be out of shape the free form surface that obtains, the incident ray that this free form surface can weaken the Illumination Distribution of the first hot spot outward by mediad is shaped to has more uniform light distribution, first surface 221 has improved the effect of the second curved surface 222 shapings so that intersect at a point after the refraction of the incident light of light source or the straight line at incident ray place intersects at a point.With respect to prior art, dodging device of the present invention need not a plurality of lenticules and forms, thereby can avoid the above-mentioned relatively poor problem of shaping effect of crosstalking etc. and to cause, have simple in structure, the advantage that shaping effect is good.
Preferably, the first surface 221 of the even optical lens 220 in the present embodiment can improve the transmission effects to incident light or/and the second curved surface 222 is coated with anti-reflection film, reduces light loss; The first surface 221 of even optical lens 220 filters incident light in specific occasion or/and the second curved surface 222 also can be coated with filter coating, improves the excitation of incident light.
Preferably, the maximum angle of the incident ray of the even optical lens 220 in the present embodiment and first surface 221 equals or is approximately equal to the emergent ray of even optical lens 220 and the maximum angle of the second curved surface 222.Relative position for the shaping effect of determining and dodging device 220 and light source 210, the incident ray of even optical lens 220 and the direction of propagation of emergent ray are determined, also determining of the deviation degree of light, but the maximum angle of the maximum angle of incident ray and first surface 221 and emergent ray and the second curved surface 222 is to change by the design of first surface 221 and the second curved surface 222.Fresnel loss on the first surface 221 of even optical lens 220 and the second curved surface 222 and incident ray or emergent ray are relevant with its angle number of degrees, the larger Fresnel loss of its angle angle is larger, therefore when two maximum angle angles equate, can reduce the Fresnel loss.In addition, so also be conducive to improve the uniformity of plated film on first surface 221 and the second curved surface 222.
The second embodiment
Fig. 5 a is the structural representation of another embodiment of the utility model dodging device.Shown in Fig. 5 a, the incident ray shaping that 320 pairs of light sources of dodging device 310 produce, this dodging device 320 includes only even optical lens, and this even optical lens comprises first surface 321 and the second curved surface 322.
The distinctive points of present embodiment and Fig. 4 a illustrated embodiment is:
1) first surface in the present embodiment 321 is free form surface.The emergent ray of light source 310 incides first surface 321 rear refractions and changes direction, and the reverse extending line of this emergent ray meets at a bit, and namely imaging point 330, and this imaging point 330 is positioned at light source 310 away from a side of first surface 321.The first surface 321 here is rotational symmetric, so imaging point 330 is positioned on the central shaft of even optical lens 320 with light source 310, and if first surface 321 is not rotational symmetric, 330 of imaging points are not on the central shaft of even optical lens 320.Certainly, be understood that easily that first surface 321 is preferably rotational symmetric, be beneficial to the machine-shaping of first surface 321.In other embodiment of the present utility model, be aspheric situation for first surface 321, preferably this first surface 321 also is rotational symmetric, is beneficial to the machine-shaping of this first surface 321.
2) Fig. 5 b is the light path schematic diagram of the second curved surface of the even optical lens shown in Fig. 5 a, and shown in Fig. 5 b, in the present embodiment, the second curved surface 322 is formed by 340 distortion of standard curved surface.Here can think that the light that incides the second curved surface 322 is sent as a spot light by imaging point 330.Standard curved surface 340 is specially Descartes's ellipsoid for the incident ray that imaging point 330 produces being converged at the curved surface of the central point of presumptive area.Presumptive area can arrange according to the actual requirements, can have multiple, such as rectangular area, elliptical region, delta-shaped region or the regular hexagon zone etc. of a specific dimensions and shape.
Except the central axis direction of imaging point 330, (comprise the direction from a to b along the direction from this central shaft to side, or from the direction of a to c), the incident angle of the incident ray that imaging point 330 produces on the second curved surface 322 and the difference maintenance jack per line (be specially and all keep negative sign) of the incident angle of this incident ray on standard curved surface 340, the incident angle of the incident ray that imaging point 330 produces on the second curved surface 322 and the absolute value monotonic increase of the difference of the incident angle of this incident ray on standard curved surface 340, and this incident ray on the second curved surface 322 incident angle and the rate of change of the absolute value of the difference of the incident angle of this incident ray on standard curved surface 340 successively decrease so that the emergent ray of the second curved surface 322 has more uniform Illumination Distribution at the incident ray that presumptive area internal ratio imaging point 330 produces.Be in the present embodiment, the second curved surface 322 is in order to realize more uniform Illumination Distribution, but not light distribution.
The emergent ray of the second curved surface 322 has more uniform Illumination Distribution at the incident ray that presumptive area internal ratio imaging point 330 produces, and refers to that the uniformity of illuminance of incident ray in presumptive area that the uniformity ratio of illuminance imaging point 330 of emergent ray in presumptive area of the second curved surface 322 produce is higher.Uniformity of illuminance in the presumptive area can adopt various ways to represent, for example, can be the ratio of the illumination minimum of a value in the presumptive area and the illumination mean value in the presumptive area; The ratio of the illumination mean value that the illumination maximum in also can presumptive area and presumptive area are interior; Also can be the ratio of the difference of the illumination mean value in the presumptive area and the illumination maximum in the presumptive area and illumination minimum of a value; Do not enumerate one by one herein.The second curved surface 222b's is identical among the principle that the second curved surface 322 is realized higher uniformity of illuminance and the upper embodiment, no longer analyzes herein.
Be understood that easily, also can be out of shape standard curved surface 340 in the present embodiment and obtain another free form surface, the difference of incident ray incident angle on standard curved surface 340 at the incident angle on this free form surface and this incident ray that imaging point 330 produces keeps jack per line (be specially and all keep positive sign), and this free form surface is similar to the free form surface 222c in Fig. 4 a illustrated embodiment.
In the present embodiment, the second curved surface 322 is for passing through on the basis of standard curved surface, adopt the deformation rule in the technique scheme to be out of shape the free form surface that obtains, the incident ray that this free form surface can weaken the Illumination Distribution of the first hot spot outward by mediad is shaped to has more uniform Illumination Distribution.First surface 321 has improved the effect of the second curved surface shaping so that intersect at a point after the refraction of the incident light of light source or the straight line at incident ray place intersects at a point.With respect to prior art, dodging device of the present invention need not a plurality of lenticules and forms, thereby can avoid the above-mentioned relatively poor problem of shaping effect of crosstalking etc. and to cause, have simple in structure, the advantage that shaping effect is good.
Embodiment three
Fig. 6 a is the structural representation of another embodiment of the utility model dodging device.Shown in Fig. 6 a, the incident ray shaping that 420 pairs of light sources of dodging device 410 produce, this dodging device 420 includes only even optical lens, and this even optical lens comprises first surface 421 and the second curved surface 422.
The difference of embodiment shown in present embodiment and Fig. 4 a and Fig. 5 a is: the first surface 421 of even optical lens 420 is the sphere of evagination, and certainly, what be readily appreciated that is that this convex surface also can be other curved surfaces such as aspheric surface or free form surface.With respect to concave surface, easier processing and plated film when first surface 421 is convex surface can improve the shaping performance of sparing optical lens 420, reduce cost.
Refraction occurs and changes the direction of propagation at first surface 421 in the emergent ray of light source 410, so that the emergent ray of light source 410 meets at a bit, this point is the imaging point 430 of light source 410, and imaging point 430 is the real image of light source 410 here.The position of the imaging point 430 in the present embodiment is that the change in location according to first surface 421 and light source 410 changes equally.In the present embodiment first surface as sphere as example, shown in Fig. 6 b, imaging point 430 is approximately image distance v with the distance of first surface 421, light source 210 is approximately object distance u (u＞0) with the distance of first surface 221, the focal length of first surface is that f is (for convex mirror, f＞0), by the lens imaging formula
As can be known:
Therefore, as u＞f, imaging point 430 real images; As u＜f, imaging point 430 is the virtual image; Work as u=f, imaging point 430 does not exist.In addition, as u＜f, when namely imaging point 430 is for the virtual image, v＜0, then:
Can release u+v＜0, namely | u|＜| v|, so imaging point 430 is during for the virtual image, imaging point 430 can only be positioned at light source 410 away from a side of first surface 431.Therefore, by the focal length of adjustment first surface 421 and the relative position of light source and first surface 431, imaging point 430 can be positioned at light source 410 away from a side of first surface 421 or any point after the first surface 421, for example in the present embodiment, imaging point 430 is between first surface 421 and the second curved surface 422.Certainly will consider in practice the degree of divergence of light source 410 emergent raies, first surface 421 will satisfy the reception with light source 210 most emergent raies.Because the refractive index of even optical lens 420 can not be infinitely great, also impossible infinitely great for the deviation degree of incident ray in addition, therefore in fact, in the time of after imaging point 430 is positioned at first surface 421, imaging point 430 can have certain distance by first surface 421.
In addition, in the present embodiment, imaging point 430 is between first surface 421 and the second curved surface 422, preferably, distance between first surface 421 and the second curved surface 422 reduces, with even optical lens 420 thickness of attenuate, this moment, emergent ray transmission the first curve 421 rear its extended lines of light source 410 met at a bit, and this point is positioned at the second curved surface 422 away from a side of first surface 421.
The 4th embodiment
Fig. 7 a is another structural representation of the utility model dodging device.Shown in Fig. 7 a, the incident ray that 520 pairs of light sources of dodging device 510 produce carries out shaping, and this dodging device 520 comprises even optical lens 521, and this even optical lens comprises first surface 521a and the second curved surface 521b.
The difference of embodiment shown in present embodiment and Fig. 6 a is:
1) dodging device 520 also comprises optical guidance element 522, and this guided optical element 522 is arranged between the first surface 521a and light source 510 of even optical lens 521, and the incident ray of reception light source 510 and this incident ray of transmission are to first surface 521a.Optical guidance element 522 is specially transparent glass sheet in the present embodiment, in actual applications, often will seal laser chip in the encapsulation of laser, generally can one transparent glass sheet be set at light-emitting window.Fig. 7 b is the light path schematic diagram of the optical directory means shown in Fig. 7 a, shown in Fig. 7 b, for spot light, its emergent ray is through behind the transparent glass sheet 522, the reverse extending line of its emergent ray no longer meets at a bit, but intersect a line segment AB with the central shaft of even optical lens, at this moment, the design of first surface 521a will be considered the light path that sheet glass is introduced.When first surface 521a is sphere or aspheric surface, for first surface 521a is designed, because AB length is shorter, line segment AB can be regarded as a spot light that is positioned at line segment AB mid point, take this spot light as new light source first surface 521a is designed.And when first surface 521a was free form surface, first surface 521a can directly adjust the emergent ray of transparent glass sheet 522, so that the light after the refraction meets at a bit or the straight line at light place meets at a bit.
Certainly, in other embodiment of the utility model, the optical guidance element is not limited in transparent glass sheet, still can be other optical element, and such as lens etc., these optical elements can satisfy some particular requirements in the light-source system.Similarly, they also can with similar processing method, design first surface with convenient.
2) after the emergent ray of light source 510 incided first surface 521a, the direction of propagation of this emergent ray changed, and the reverse extending line of emergent ray meets at a bit, and namely imaging point 530.In the embodiment shown in Fig. 6 a, imaging point 430 is real image, and the imaging point 530 here is the virtual image, and at this moment, the emergent ray of light source 510 has reduced through the angle of deviation behind the first surface 521a, and it is less that the Fresnel loss on its first surface also becomes.In addition, the degree of deviation is larger, then requires the refractive index of even optical lens larger, so that the material of lens is restricted.Therefore, be the situation of real image with respect to imaging point 430, imaging point 530 should be preferably for the virtual image.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
The utility model embodiment also provides a kind of light-source system, comprises dodging device, and this dodging device can have structure and the function in the various embodiments described above.This light-source system can be applied to the fields such as various optical projection systems and illuminator.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (9)
1. dodging device, incident ray shaping to the light source generation, the maximum length of the light-emitting area of described light source receive less than described adjacent optical elements less than or equal to the area of the light-emitting area of 1/10th and this light source of the distance of this light source and adjacent optical elements the light source incident light surface area 1/10th, this light source is approximate spot light, and the incident ray of described light source weakens outside by mediad in the Illumination Distribution of the hot spot that the arbitrary plane vertical with the central shaft of this light source forms, described dodging device is characterised in that, described dodging device comprises even optical lens at least, and this even optical lens comprises:
First surface, this first surface receive the emergent ray of described light source and change its direction of propagation, so that the emergent ray of described light source meets at a bit or emergent ray place straight line intersects at a point, this point is the imaging point of described light source;
The second curved surface, the incident ray of this second curved surface is the light from the first surface outgoing, described the second curved surface is free form surface, and is obtained by a standard surf deform in the precalculated position of the central axis direction that is positioned at described light source, and this standard curved surface is for being shaped as to incident ray the curved surface of directional light;
Except described central axis direction, direction along the side direction from this central shaft to central shaft, the difference of described incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray keeps jack per line, the absolute value monotonic increase of the difference of described incident ray incident angle on the standard curved surface at the incident angle on the second curved surface and this incident ray, and this incident ray on described the second curved surface incident angle and the rate of change of the absolute value of the difference of the incident angle of this incident ray on the standard curved surface successively decrease so that the emergent ray of described the second curved surface has more uniform light distribution at the described incident ray of predetermined solid angle internal ratio.
2. dodging device, incident ray shaping to the light source generation, described light source is 1/10th of the maximum length of the light-emitting area surface area that receives the light source incident light less than or equal to this light source to the area of the light-emitting area of 1/10th and this light source of the distance of adjacent optical elements less than described adjacent optical elements, this light source is approximate spot light, and the incident ray of described light source weakens outside by mediad in the Illumination Distribution of the hot spot that the arbitrary plane vertical with the central shaft of this light source forms, described dodging device is characterised in that, described dodging device comprises even optical lens at least, and this even optical lens comprises:
First surface, this first surface receive the emergent ray of described light source and change its direction of propagation, so that the emergent ray of described light source meets at a bit or emergent ray place straight line intersects at a point, this point is the imaging point of described light source;
The second curved surface, the incident ray of this second curved surface is the light from the first surface outgoing, described the second curved surface is free form surface, and obtained by a standard surf deform in the precalculated position of the central axis direction that is positioned at described light source, this standard curved surface is for converging at incident ray the curved surface of the central point of presumptive area;
Except described central axis direction, direction along the side direction from this central shaft to central shaft, the incident angle of described incident ray on described the second curved surface and the difference maintenance jack per line of the incident angle of this incident ray on the standard curved surface, the incident angle of described incident ray on described the second curved surface and the absolute value monotonic increase of the difference of the incident angle of this incident ray on the standard curved surface, and this incident ray on described the second curved surface incident angle and the rate of change of the absolute value of the difference of the incident angle of this incident ray on the standard curved surface successively decrease so that the emergent ray of described the second curved surface has more uniform Illumination Distribution at the described incident ray of presumptive area internal ratio.
3. dodging device according to claim 1 and 2 is characterized in that, the first surface of described even optical lens is convex surface.
4. dodging device according to claim 1 and 2 is characterized in that, the first surface of described even optical lens is sphere, aspheric surface or free form surface.
5. dodging device according to claim 4 is characterized in that, described first surface is rotational symmetric free form surface or aspheric surface, so that the imaging point of described light source and this light source is positioned on the even optical lens central shaft.
6. dodging device according to claim 1 and 2 is characterized in that, described first surface is or/and the surface of the second curved surface is coated with anti-reflection film or filter coating.
7. dodging device according to claim 1 and 2 is characterized in that, the incident ray of described even optical lens and the maximum angle of described first surface equal or be approximately equal to the emergent ray of described even optical lens and the maximum angle of described the second curved surface.
8. dodging device according to claim 1 and 2, it is characterized in that, described dodging device also comprises guided optical element, this guided optical element is arranged between the first surface and described light source of described even optical lens, receives the emergent ray of described light source and this emergent ray of transmission to described first surface.
9. a light-source system is characterized in that, described light-source system comprises each described dodging device in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287513 CN202675155U (en) | 2012-06-18 | 2012-06-18 | Dodging device and light source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287513 CN202675155U (en) | 2012-06-18 | 2012-06-18 | Dodging device and light source system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202675155U true CN202675155U (en) | 2013-01-16 |
Family
ID=47496060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220287513 Expired - Lifetime CN202675155U (en) | 2012-06-18 | 2012-06-18 | Dodging device and light source system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202675155U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116197A (en) * | 2013-01-31 | 2013-05-22 | 中国科学技术大学 | Single-free-form-surface thick lens with short-distance uniform light effect and array thereof |
| CN103148443A (en) * | 2013-01-31 | 2013-06-12 | 中国科学技术大学 | Dual-free-curve thick lens for obtaining uniform parallel light beams and array thereof |
| CN103216786A (en) * | 2013-05-02 | 2013-07-24 | 深圳市裕富照明有限公司 | Light-emitting diode (LED) lens |
| CN104344335A (en) * | 2013-08-05 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Lens and light source module comprising same |
| TWI500955B (en) * | 2013-09-30 | 2015-09-21 | Hon Hai Prec Ind Co Ltd | Design method of a freeform imaging lens |
| TWI513937B (en) * | 2014-10-02 | 2015-12-21 | Playnitride Inc | Optical module |
-
2012
- 2012-06-18 CN CN 201220287513 patent/CN202675155U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116197A (en) * | 2013-01-31 | 2013-05-22 | 中国科学技术大学 | Single-free-form-surface thick lens with short-distance uniform light effect and array thereof |
| CN103148443A (en) * | 2013-01-31 | 2013-06-12 | 中国科学技术大学 | Dual-free-curve thick lens for obtaining uniform parallel light beams and array thereof |
| CN103216786A (en) * | 2013-05-02 | 2013-07-24 | 深圳市裕富照明有限公司 | Light-emitting diode (LED) lens |
| CN104344335A (en) * | 2013-08-05 | 2015-02-11 | 鸿富锦精密工业（深圳）有限公司 | Lens and light source module comprising same |
| TWI500955B (en) * | 2013-09-30 | 2015-09-21 | Hon Hai Prec Ind Co Ltd | Design method of a freeform imaging lens |
| TWI513937B (en) * | 2014-10-02 | 2015-12-21 | Playnitride Inc | Optical module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202675155U (en) | Dodging device and light source system | |
| CN103279005B (en) | LASER Light Source, wavelength convert light source, conjunction radiant and optical projection system | |
| CN107861253B (en) | Laser projection device | |
| TWI418855B (en) | Illuminant module with an optical film of multiple curvatures | |
| CN203298189U (en) | LED light source with COB module | |
| US20220050301A1 (en) | Light Modulator and its Modulation Method | |
| CN104991347A (en) | Laser shaping illuminator based on microlens array | |
| TW201527148A (en) | Vehicle headlight device | |
| JP2022051831A (en) | Optical beam former | |
| CN103185286B (en) | Even optical element and light-source system | |
| US20190195455A1 (en) | Headlight device | |
| CN104819433A (en) | Oval light spot realizing device, light spot adjusting device and operating lamp | |
| CN102679265B (en) | Method for realizing homogenized control of light beam by utilizing free-form curved lens | |
| EP3783396A1 (en) | Matrix optical system, light concentrating system, and compound eye lens | |
| CN205331882U (en) | Optical devices and lighting device | |
| CN105676340B (en) | Polarization multiplexing light guide structure of composite parabolic reflection micro-collimating lens and implementation method thereof | |
| CN105020674A (en) | Light source device | |
| CN105098597B (en) | Correcting system of laser, light source system and projection device | |
| CN203363991U (en) | LED (light-emitting diode) secondary optical lens | |
| CN202886732U (en) | Compensatory light source system and train operation fault dynamic image detection equipment | |
| CN113640903B (en) | Fly-eye lens, backlight illumination system and manufacturing method thereof | |
| CN204028462U (en) | Laser cell and laser system | |
| CN111856853B (en) | Micro-lens array projection system of composite micro-prism | |
| KR20180094581A (en) | Light collimation and projection optical system with full angle range for lamp of car, car lamp with the same | |
| CN107329194A (en) | The optical fiber light-distribution lens and its determination method of a kind of ellipse light spot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171024 Address after: 518055 Guangdong city of Shenzhen province Nanshan District Xili town tea light road Shenzhen city integrated circuit design and application of Industrial Park 401 Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518057, Guangdong, Nanshan District Shenzhen science and Technology Park, South Road, twelve square building, third floor Patentee before: YLX Inc. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address after: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518055 Guangdong province Shenzhen Nanshan District Xili town Cha Guang road Shenzhen integrated circuit design application Industrial Park 401 Patentee before: APPOTRONICS Corp.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |