CN210398589U - Annular light source device - Google Patents
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- CN210398589U CN210398589U CN201921787922.6U CN201921787922U CN210398589U CN 210398589 U CN210398589 U CN 210398589U CN 201921787922 U CN201921787922 U CN 201921787922U CN 210398589 U CN210398589 U CN 210398589U
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Abstract
The utility model discloses an annular light source device for improve light source device's luminance. The annular light source device comprises a shell, a plurality of light sources, a plurality of collimating lenses and a collecting lens. A plurality of light sources are disposed within the housing, the plurality of light sources being arranged along a circular path. A plurality of collimating lenses are disposed in the housing, and a collimating lens and a light source are disposed opposite to each other. The collecting mirror is arranged on the shell, the collimating mirror is positioned between the collecting mirror and the light source, and the collecting mirror extends along the circular track. The collimator lens is used for correcting the light rays emitted from the light source and then emitting the light rays. The condenser is used for converging the light rays emitted from the collimating mirror to a target focus. In this way, a plurality of light sources arranged along a circular path emit light rays which are incident on a collimator lens. Because the condenser lens also extends along the circular track, the light rays emitted from the plurality of collimating lenses can be converged to a target focus. Therefore, the brightness at the target focus is larger, and the brightness of the annular light source device is improved as a whole.
Description
Technical Field
The utility model relates to a lighting apparatus technical field especially relates to an annular light source device.
Background
In the field of lighting equipment, for example, in the case of industrial inspection lighting, a light source used is a bulb, an LED lamp, or the like. The articles are irradiated by the light source, so that a worker can carry out certain technological operation.
However, the existing lighting devices often use a single light bulb or LED lamp, and light is emitted from these light sources at multiple angles, resulting in insufficient illumination of an object or the like and a low brightness provided by the lighting device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an annular light source device for improve light source device's luminance.
To achieve the purpose, the utility model adopts the following technical proposal:
an annular light source device comprising:
a housing;
a plurality of light sources disposed within the housing, the plurality of light sources arranged along a circular trajectory;
the plurality of collimating lenses are arranged in the shell, and one collimating lens and one light source are arranged oppositely;
the collecting mirror is arranged on the shell, the collimating mirror is positioned between the collecting mirror and the light source, and the collecting mirror extends along the circular track;
the collimating mirror is used for correcting the light rays emitted from the light source and then emitting the light rays, wherein a first angle is larger than a second angle, the first angle is an included angle between the light rays emitted into the collimating mirror and an optical axis of the collimating mirror, and the second angle is an included angle between the light rays emitted out of the collimating mirror and the optical axis of the collimating mirror;
the condenser is used for converging the light rays emitted from the collimating mirror to a target focus.
Optionally, the target focus and the center of the circular track are located on the same straight line.
Optionally, the annular light source device further includes a plurality of diaphragms, the plurality of diaphragms are disposed in the housing, and one diaphragm is located between one light source and one collimating mirror;
the diaphragm is used for adjusting the range of the second angle.
Optionally, the second angle is in a range of 0.2 degrees to 15 degrees.
Optionally, the light pattern of the emergent light of the collimating mirror is gaussian, the light pattern has a Sigma parameter range of 0-3, and the Sigma parameter represents the variance of the gaussian function.
Optionally, the condenser lens and the housing are detachably connected.
Optionally, the shell is of a circular ring structure, and an inner ring penetrating through the shell is arranged in the middle of the shell;
the shell comprises an extension surface which is arranged along the side edge of the inner ring;
the extension face is provided with a mounting position, and the mounting position is used for being connected with external equipment.
Optionally, the ring light source device further comprises a target element;
the target element is arranged on one side of the collecting mirror far away from the collimating mirror, and the target element is a polarizing element or a phase element.
Optionally, the collimating mirror and the housing are connected by a sealant;
the collimating lens is connected with the collecting lens through a sealant.
Optionally, the condenser lens is one of a spherical lens, an aspherical lens, a fresnel lens, and a diffractive lens;
the light source is a paster lamp bead.
The utility model has the advantages that:
the utility model discloses annular light source device includes casing, a plurality of light source, a plurality of collimating mirror and condensing lens. Wherein the plurality of light sources are disposed within the housing, the plurality of light sources being arranged along a circular track. A plurality of collimating mirrors are disposed within the housing, with a collimating mirror and a light source disposed opposite one another, such that the plurality of collimating mirrors are also arranged along a circular path. The collecting mirror is arranged on the shell, the collimating mirror is positioned between the collecting mirror and the light source, and the collecting mirror extends along the circular track. The collimator lens is used for correcting the light rays emitted from the light source and then emitting the light rays. The first angle is larger than the second angle, the first angle is an included angle between the light ray and the optical axis of the collimating mirror when the light ray enters the collimating mirror, and the second angle is an included angle between the light ray and the optical axis of the collimating mirror when the light ray exits the collimating mirror. The condenser is used for converging the light rays emitted from the collimating mirror to a target focus. In this way, a plurality of light sources arranged along a circular path emit light rays which enter the collimator lens, which, due to the collimating effect of the collimator lens, pass through the collimator lens and the light path is deflected. Because the condenser lens also extends along the circular track, the light rays emitted from the plurality of collimating lenses can be converged to a target focus. The light rays of the plurality of light sources are converged at the target focus, so that the brightness at the target focus is high, and the brightness of the annular light source device is improved as a whole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an annular light source device according to an embodiment of the present invention;
FIG. 2 is another schematic diagram of the annular light source device shown in FIG. 1;
FIG. 3 is a cross-sectional view of the annular light source apparatus shown in FIG. 1;
FIG. 4 is a partial schematic view of the annular light source device shown in FIG. 1 with the collecting mirror and the collimating mirror removed;
FIG. 5 is a partial schematic view of the ring light source device of FIG. 1 with the collection optic removed;
fig. 6 is a schematic light path diagram of an annular light source device according to an embodiment of the present invention;
fig. 7 is a schematic light path diagram of an annular light source device according to an embodiment of the present invention.
In the figure:
1. a housing; 2. a light source; 3. a collimating mirror; 4. a condenser lens; 5. a target focus; 6. a diaphragm; 7. an inner ring; 8. an extension plane; 9. an installation position; 10. a target element; 11. a target straight line; 12. and irradiating the surface.
Detailed Description
The embodiment of the utility model provides an annular light source device for improve the luminance of light source 2 device.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to accurately understand the annular light source device according to the embodiment of the present invention, some terms related to the embodiment of the present invention are exemplarily explained below.
1. A collimating mirror;
a collimator refers to an element that converts near-lambertian rays or other rays emitted by a light source into parallel rays or rays that are emitted nearly in parallel. The collimator may be of a refractive design.
2. A condenser lens;
an optical element for converging light to a certain position (focus) generally includes parameters such as an effective clear aperture, an effective transmission wavelength, and a focal length.
3. A diaphragm;
a stop is an entity that acts to limit the light beam in an optical system. It may be the edge of a lens, a frame or a specially provided screen with holes. Its role can be divided into two aspects, in particular limiting the beam or limiting the size of the field of view (imaging range).
4. A polarizing element;
a polarizing element is an element that changes the polarization state of light. Since Light emitted from a Light bulb or a Light Emitting Diode (LED) is unpolarized Light, it is necessary to detect defects of an element to be detected using polarization information of Light in some cases.
5. A phase element;
the phase element is an element that changes the phase of light, and belongs to a physical optical element.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an annular light source device according to an embodiment of the present invention, fig. 2 is another schematic structural diagram of the annular light source device shown in fig. 1, and fig. 3 is a cross-sectional view of the annular light source device shown in fig. 1.
As shown in fig. 1, 2 and 3, the annular light source device according to the embodiment of the present invention includes a housing 1, a plurality of light sources 2, a plurality of collimating lenses 3, and a condensing lens 4.
Wherein a plurality of light sources 2 are arranged within the housing 1, as shown in fig. 4, the plurality of light sources 2 are arranged along a circular track. In other words, the plurality of light sources 2 are distributed in a circular ring shape. Specifically, the distances between the adjacent light sources 2 may be equal or unequal, and the embodiment of the present invention is not particularly limited to this. In the example shown in fig. 4, the plurality of light sources 2 are equally spaced along a circular locus, i.e. the adjacent light sources 2 are equally spaced.
As shown in fig. 5, a plurality of collimators 3 are disposed in the housing 1, and a collimator 3 and a light source 2 are disposed opposite to each other, and in this case, the plurality of collimators 3 are also arranged along a circular path. The collimating mirror 3 and the light source 2 are arranged oppositely, that is, the irradiation direction of the light source 2 faces the light incident end of the collimating mirror 3, and the light source 2 and the collimating mirror 3 are separated by a preset distance.
The condenser 4 is arranged on the housing 1, the collimator lens 3 is located between the condenser 4 and the light source 2, and the condenser 4 also extends along the circular track. For example, as shown in fig. 1, the condenser 4 has a circular ring structure, and the condenser 4 is connected to the surface of the housing 1. Thus, the light emitted from the light source 2 enters the collimator lens 3, passes through the collimator lens 3, enters the condenser lens 4, and then exits the condenser lens 4.
The collimator lens 3 is used to collimate the light beam entering from the light source 2 and then to emit the light beam. The first angle is larger than the second angle, the first angle is an included angle between the light beam incident into the collimating mirror 3 and the optical axis of the collimating mirror 3, and the second angle is an included angle between the light beam incident out of the collimating mirror 3 and the optical axis of the collimating mirror 3.
The light emitted from the collimator lens 3 may be parallel light or light emitted in a direction close to the parallel light.
The optical axis of the collimator lens 3 is a straight line passing through the center of the collimator lens 3 and perpendicular to the light incident surface and the light exit surface of the collimator lens 3.
The condenser 4 is used to condense the light from the collimator 3 to a target focus 5. The target focus 5 is an area on the irradiation surface 12, and the light emitted from the annular light source device is converged on the target focus 5.
Optionally, the target focus 5 and the aforementioned circular locus are centered on the same line for ease of processing the optical components and for ease of use of the annular light source device by the user. That is, the center of the circular track formed by arranging the plurality of light sources 2 and the target focus 5 are located on the same straight line. Because the condenser lens 4 also extends along the circular track, the center of the condenser lens 4 and the target focus 5 are also located on the same straight line.
For example, as shown in fig. 6, the target straight line 11 passes through the target focal point 5 and the center of the aforementioned circular locus.
It should be understood that, in the embodiment of the present invention, the housing 1 has various specific implementations, such as a circular structure, a square structure, or an irregular pattern structure.
In the example shown in fig. 1 and 2, the housing 1 has a circular ring-shaped configuration, and an inner ring 7 penetrating the housing 1 is provided in the middle of the housing 1. The light source 2 and the collimating mirror 3 are arranged in the housing 1 of the circular ring structure. The power supply to the light source 2 may be realized by using a Printed Circuit Board (PCB). For example, a metal base PCB is provided in the housing 1 at a portion close to the light source 2, the metal base PCB being electrically connected to the light source 2, the metal base PCB taking electric power from the outside of the ring-shaped light source device. Wherein, the condenser 4 is a ring structure, and the condenser 4 is arranged at the end of the shell 1. Light from the ring light source device exits from the condenser lens 4.
The utility model discloses annular light source device's specific light path diagram can refer to fig. 6, as shown in fig. 6, and light jets out from light source 2, sets up relatively because of a collimating mirror 3 and a light source 2 to most light shoots into collimating mirror 3, and sees through collimating mirror 3. The collimator lens 3 collimates the light incident from the light source 2 to emit the light in parallel. The light rays emitted in parallel enter the condenser 4 and pass through the condenser 4. The condenser 4 converges the light entering from the collimator 3 to a target focus 5. The target focus 5 is located on the irradiation surface 12, and an object to be detected or to be illuminated is placed at the target focus 5, most of the light emitted from the condenser lens 4 of the annular light source device is converged on the target focus 5, so that the illumination brightness of the annular light source device is improved. And the angle of emergent light of the annular light source device is controlled by adjusting the light path of the light rays through the collimating lens 3 and the collecting lens 4.
The utility model discloses the light that annular light source device jetted out overlaps less to can also be applicable to the light illumination that three-Dimensional (3Dimensional, 3D) detected in order to be applicable to the light illumination that the plane detected, the defect formation of image precision influence that detects 3D is less, thereby can improve the formation of image precision.
In the embodiment of the present invention, the collecting mirror 4 has a plurality of specific implementation manners, for example, the collecting mirror 4 adopts a refraction type design, and the collecting mirror 4 is one of a spherical mirror, an aspherical mirror, a fresnel lens, and a diffractive lens. And the focal length of the condenser lens 4 ranges from 5mm to 200 mm.
The embodiment of the utility model provides an in, light source 2 has multiple specific implementation, and for example light source 2 is paster lamp pearl, specifically can be high-power paster lamp pearl, and wherein, light source 2 can be LED.
In the embodiment of the present invention, the collimator lens 3 has a plurality of specific implementation manners, for example, the collimator lens 3 adopts a refraction design, and the collimator lens 3 may be made of glass or plastic, for example, a material with a lower molding cost, such as polymethyl methacrylate (PMMA), Polycarbonate (PC), or H-K9L (a colorless optical glass).
Optionally, the second angle is in a range of 0.2 degrees to 15 degrees. In other words, the angle between the light ray exiting the collimator lens 3 and the optical axis of the collimator lens 3 is 0.2-15 degrees.
In addition, optionally, the light pattern of the emergent light of the collimating mirror 3 is gaussian, the light pattern has a Sigma parameter range of 0-3, and the Sigma parameter represents the variance of the gaussian function. Alternatively, the light pattern of the collimator lens 3 is a square wave. This makes it possible to reduce stray light interference outside the area of the condenser lens 4. In order to realize such a light pattern, the surface shape of the collimator lens 3 and the matching of the diaphragm are changed.
In order to switch different working distances of the annular light source device, the condenser lens 4 and the shell 1 are optionally detachably connected. For example, the condenser lens 4 is fixedly attached to the housing 1 with screws. Or, the side of condensing lens 4 is equipped with the screw thread, and the inside wall of casing 1 is equipped with the screw thread, and the connection can be dismantled through the screw thread realization to condensing lens 4 and casing 1. Or, the side surface of the condenser lens 4 is clamped with the inner side wall of the shell 1.
Optionally, the collimating mirror 3 and the housing 1 are connected by a sealant. Wherein, the sealant can be in the form of a sealing rubber strip. Therefore, the IP protection function can be realized between the collimating mirror 3 and the shell 1 by arranging a sealing rubber strip or a sealant.
Optionally, the collimating lens 3 and the collecting lens 4 are connected by a sealant. Wherein, the sealant can be in the form of a sealing rubber strip. Therefore, the function of IP protection can be realized by arranging a sealing rubber strip or a sealant between the condenser lens 4 and the collimating lens 3.
It should be understood that, in some embodiments of the present invention, when the sealing strip and the sealant are used for sealing, in order to realize the detachable connection between the collecting lens 4 and the housing 1, a certain space may be reserved between the sealant and the fixing screw, so that the collecting lens 4 can be conveniently replaced by detaching the fixing screw.
Optionally, as shown in fig. 6, the annular light source device further includes a plurality of diaphragms 6, the plurality of diaphragms 6 are disposed in the housing 1, and one diaphragm 6 is located between one light source 2 and one collimating mirror 3. The diaphragm 6 is used to adjust the range of the second angle. This is because the range of the marginal rays is changed by the diaphragm 6 when the rays pass through the diaphragm 6, so that the range of the angle between the rays entering the collimator lens 3 and the optical axis of the collimator lens 3 is changed, in particular the maximum value of the range of the angle becomes smaller. In this way, the range of the included angle between the light beam exiting the collimator lens 3 and the optical axis of the collimator lens 3 changes, i.e. the range of the second angle, which is the included angle between the light beam exiting the collimator lens 3 and the optical axis of the collimator lens, changes.
Thus, the light rays emerge from the light source 2, pass through the diaphragm 6 and enter the collimator lens 3. The collimator lens 3 rectifies the light to emit light.
To achieve the illumination purpose of the physical optical imaging, optionally, as shown in fig. 7, the ring light source device further includes a target element 10. Wherein the target element 10 is arranged on the side of the condenser 4 away from the collimator lens 3, and the target element 10 is a polarizing element or a phase element. A polarizing element is an element that changes the polarization state of light. Because the light emitted by the bulb and the LED is unpolarized light, the polarization information of the light is needed to detect the defects of the element to be detected in some occasions. The phase element is an element that changes the phase of light, and both the polarization element and the phase element belong to physical optical elements. Thus, the light beam emitted from the condenser 4 first strikes the target element 10, and then strikes the target focal point 5 from the target element 10.
In some embodiments of the present invention, as shown in fig. 2 and 3, optionally, the casing 1 is a circular ring structure, and an inner ring 7 penetrating through the casing 1 is disposed in the middle of the casing 1.
The housing 1 comprises an extension surface 8, the extension surface 8 being arranged along the side of the inner ring 7. The extension surface 8 is provided with mounting locations 9, the mounting locations 9 being used for connection with external equipment.
This installation position 9 can be screw hole, buckle etc. and the embodiment of the utility model provides a do not do specifically to this and restrict. For example, as shown in fig. 2 and 3, the mounting locations 9 are screw holes. Therefore, the utility model discloses annular light source device can realize the use with external equipment such as microscope through the application of screw on installation position 9. Particularly, use the screw to pass behind the installation position 9 of extension face 8 of casing 1, external equipment such as screw and microscope is connected to make the utility model discloses the annular light source device of embodiment is connected with external equipment such as microscope.
To sum up, the utility model discloses annular light source device includes casing 1, a plurality of light source 2, a plurality of collimating mirror 3 and condensing lens 4. Wherein a plurality of light sources 2 are arranged within the housing 1, the plurality of light sources 2 being arranged along a circular ring shaped track. A plurality of collimators 3 are arranged in the housing 1, a collimator 3 and a light source 2 being arranged opposite one another, so that the plurality of collimators 3 are also arranged along a circular path. The collecting mirror 4 is arranged on the shell 1, the collimating mirror 3 is positioned between the collecting mirror 4 and the light source 2, and the collecting mirror 4 extends along a circular track. The collimator lens 3 is used to collimate the light beam entering from the light source and then emit the light beam. The first angle is larger than the second angle, the first angle is an included angle between the light beam incident into the collimating mirror 3 and the optical axis of the collimating mirror 3, and the second angle is an included angle between the light beam incident out of the collimating mirror 3 and the optical axis of the collimating mirror 3. The condenser 4 is used to condense the light from the collimator 3 to a target focus 5. In this way, a plurality of light sources 2 arranged along a circular path emit light rays which enter the collimator 3, which, due to the corrective action of the collimator 3, pass through the collimator 3 and the light path is deflected. Since the condenser 4 also extends along the circular track, the light rays emitted from the plurality of collimators 3 can be converged to a target focus 5. Since the light rays of the plurality of light sources 2 are converged at the target focal point 5, the luminance at the target focal point 5 is high, and the luminance of the annular light source device as a whole is improved.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An annular light source device, comprising:
a housing;
a plurality of light sources disposed within the housing, the plurality of light sources arranged along a circular trajectory;
the plurality of collimating lenses are arranged in the shell, and one collimating lens and one light source are arranged oppositely;
the collecting mirror is arranged on the shell, the collimating mirror is positioned between the collecting mirror and the light source, and the collecting mirror extends along the circular track;
the collimating mirror is used for correcting the light rays emitted from the light source and then emitting the light rays, wherein a first angle is larger than a second angle, the first angle is an included angle between the light rays emitted into the collimating mirror and an optical axis of the collimating mirror, and the second angle is an included angle between the light rays emitted out of the collimating mirror and the optical axis of the collimating mirror;
the condenser is used for converging the light rays emitted from the collimating mirror to a target focus.
2. The annular light source device according to claim 1,
the target focus and the circle center of the circular track are positioned on the same straight line.
3. The annular light source device according to claim 1,
the annular light source device also comprises a plurality of diaphragms, the diaphragms are arranged in the shell, and one diaphragm is positioned between one light source and one collimating mirror;
the diaphragm is used for adjusting the range of the second angle.
4. The annular light source device according to claim 1,
the second angle is in the range of 0.2 degrees to 15 degrees.
5. The annular light source device according to claim 1,
the light pattern of emergent light of the collimating mirror is Gaussian, the Sigma parameter range of the light pattern is 0-3, and the Sigma parameter represents the variance of a Gaussian function.
6. The annular light source device according to claim 1,
the condenser lens and the shell are detachably connected.
7. The annular light source device according to claim 1,
the shell is of a circular ring structure, and an inner ring penetrating through the shell is arranged in the middle of the shell;
the shell comprises an extension surface which is arranged along the side edge of the inner ring;
the extension face is provided with a mounting position, and the mounting position is used for being connected with external equipment.
8. The annular light source device according to claim 1,
the annular light source device further comprises a target element;
the target element is arranged on one side of the collecting mirror far away from the collimating mirror, and the target element is a polarizing element or a phase element.
9. The annular light source device according to claim 1,
the collimating lens is connected with the shell through a sealant;
the collimating lens is connected with the collecting lens through a sealant.
10. The annular light source device according to claim 1,
the condenser lens is one of a spherical lens, an aspherical lens, a Fresnel lens and a diffraction lens;
the light source is a paster lamp bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921787922.6U CN210398589U (en) | 2019-10-23 | 2019-10-23 | Annular light source device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921787922.6U CN210398589U (en) | 2019-10-23 | 2019-10-23 | Annular light source device |
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| CN210398589U true CN210398589U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726092A (en) * | 2019-10-23 | 2020-01-24 | 东莞市沃德普自动化科技有限公司 | Annular light source device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110726092A (en) * | 2019-10-23 | 2020-01-24 | 东莞市沃德普自动化科技有限公司 | Annular light source device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |