CN220749882U - Scanning light source device - Google Patents

Abstract

The utility model provides a scanning light source device. The scanning light source device includes: the protection frame is concavely arranged on one side of the protection frame to form a concave cavity; the light-emitting structure is arranged in the concave cavity; the light-emitting surface of the light-condensing structure is spherical, and two sides of the spherical surface are respectively connected with two side wall surfaces of the light-condensing structure; and the glass cover plate is arranged at the top of the concave cavity. The utility model solves the problem of insufficient brightness of the scanning light source device in the prior art.

Description

Scanning light source device

Technical Field

The utility model relates to the technical field of image sensing equipment, in particular to a scanning light source device.

Background

Image sensors are widely used in various fields including digital photography, video surveillance, unmanned, industrial inspection, and the like. The image sensor is capable of capturing light signals in the real world and converting them to digital signals, which are then converted to visual images or video by processing algorithms.

However, the existing scanning light source device of the image sensor has the problem of insufficient brightness, so that the scanning effect is affected, and the subsequent recognition difficulty is increased. When the brightness is insufficient, the light signal received by the image sensor is weak, which may cause the brightness of the image to be insufficient and the details to be unclear. In addition, the insufficient brightness of the scanning light source device may cause noise problems of the image sensor. The image sensor needs to increase signal amplification under low light conditions to compensate for the shortage of the optical signal, which can lead to more noise in the image and reduce the quality of the image.

That is, the scanning light source device in the related art has a problem of insufficient brightness.

Disclosure of Invention

The utility model mainly aims to provide a scanning light source device so as to solve the problem of insufficient brightness of the scanning light source device in the prior art.

In order to achieve the above object, the present utility model provides a scanning light source device including: the protection frame is concavely arranged on one side of the protection frame to form a concave cavity; the light-emitting structure is arranged in the concave cavity; the light-emitting surface of the light-condensing structure is spherical, and two sides of the spherical surface are respectively connected with two side wall surfaces of the light-condensing structure; and the glass cover plate is arranged at the top of the concave cavity.

Further, the spherical surface and the total reflection surface are in smooth transition, and the spherical surface is arranged in a protruding mode in a direction away from the light-emitting structure.

Further, the diameter of the sphere is less than 13mm.

Further, the concave cavity sequentially comprises a first part, a second part and a third part along the light emitting direction of the scanning light source device, at least part of the light emitting structure is accommodated in the first part, the light condensing structure is accommodated in the second part and the third part, the height of the second part in the light emitting direction is equal to the height of the side wall surface of the light condensing structure in the light emitting direction, and the height of the third part in the light emitting direction is greater than or equal to the radius of the spherical surface.

Further, the cavity wall of the first part is in a step shape, the sectional area of the second part along the direction perpendicular to the light emitting direction is gradually increased along the direction away from the light emitting structure, and the sectional area of the third part along the direction perpendicular to the light emitting direction is kept consistent along the direction away from the light emitting structure.

Further, the light incident surface of the light condensation structure is recessed towards a direction away from the light emitting structure to form a containing cavity, and at least a part of the light emitting structure is contained in the containing cavity.

Further, the diameter of the receiving cavity is less than 4mm.

Further, the light condensing structure further comprises a first end face and a second end face, one side of the light incident face is connected with one side wall face of the light condensing structure through the first end face, the other side of the light incident face is connected with the other side wall face of the light condensing structure through the second end face, and the distance from the first end face to the glass cover plate is equal to the distance from the second end face to the glass cover plate.

Further, the side wall surface of the light-gathering structure is parabolic along the direction away from the light-emitting structure.

Further, the side wall surface of the light gathering structure comprises a plurality of surface sections which are sequentially connected along the direction far away from the light emitting structure, the adjacent two surface sections in the surface sections are arranged at an angle, the surface section close to the light emitting structure in the surface sections is a first surface section, and the included angle between the first surface section and the central line of the light gathering structure is smaller than or equal to 42 degrees; and/or the included angles between the plurality of surface sections and the central line of the light-gathering structure gradually decrease along the direction away from the light-emitting structure.

By applying the technical scheme of the utility model, the scanning light source device comprises a protective frame, a light-emitting structure, a light-condensing structure and a glass cover plate, and one side of the protective frame is concavely arranged to form a concave cavity; the light-emitting structure is arranged in the concave cavity; the light-gathering structure is arranged on the light-emitting side of the light-emitting structure, the side wall surfaces of at least two sides of the light-gathering structure are total reflection surfaces, the light-emitting surface of the light-gathering structure is a spherical surface, and two sides of the spherical surface are respectively connected with the two side wall surfaces of the light-gathering structure; the glass cover plate is covered on the top of the concave cavity.

One side of the protection frame is concavely provided with a concave cavity, so that the concave cavity provides a mounting space for the light-emitting structure and the light-condensing structure, and the mounting stability and the use reliability of the light-emitting structure and the light-condensing structure are guaranteed. The light condensing structure is used for converging light emitted by the light emitting structure, the side wall surfaces of at least two sides of the light condensing structure are set to be total reflection surfaces, and the light emitting surface is set to be spherical, so that light rays at the edge of the light emitting structure can be converged and emitted by the spherical through total reflection of the total reflection surfaces, the situation that the brightness is low due to incapability of utilizing the edge light rays is avoided, the light rays can be concentrated through optimizing the shape of the light condensing structure, and the light rays are beneficial to improving the illumination brightness of a detection object plane. The glass cover plate cover is arranged at the top of the concave cavity, plays a role in protecting internal devices, prevents dust and dirt from entering the concave cavity, and ensures tightness.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic diagram of a scanning light source device according to an alternative embodiment of the present utility model;

FIG. 2 shows a schematic view of an angle of the concentrating structure of FIG. 1;

FIG. 3 shows a schematic view of another angle of the concentrating structure of FIG. 1;

fig. 4 shows an optical path diagram of the scanning light source device of the present utility model;

fig. 5 shows a spot diagram of the scanning light source device of the present utility model.

Wherein the above figures include the following reference numerals:

10. a protective frame; 11. a first portion; 12. a second portion; 13. a third section; 20. a light emitting structure; 21. an LED; 22. a circuit board; 30. a light-gathering structure; 31. a total reflection surface; 32. a spherical surface; 33. a light incident surface; 34. a first end face; 35. a second end face; 36. a receiving chamber; 40. a glass cover plate; 50. a center line; 61. a first face segment; 62. a second face segment; 63. a third face section; 64. a fourth face segment; 65. a fifth section; 66. a sixth section; 67. and a seventh segment.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

In order to solve the problem of insufficient brightness of the scanning light source device in the prior art, the utility model provides the scanning light source device.

As shown in fig. 1 to 5, the scanning light source device includes a protective frame 10, a light emitting structure 20, a light condensing structure 30, and a glass cover plate 40, one side of the protective frame 10 is concavely arranged to form a concave cavity; the light emitting structure 20 is disposed in the cavity; the light-gathering structure 30 is arranged on the light-emitting side of the light-emitting structure 20, the side wall surfaces of at least two sides of the light-gathering structure 30 are total reflection surfaces 31, the light-emitting surface of the light-gathering structure 30 is a spherical surface 32, and two sides of the spherical surface 32 are respectively connected with the two side wall surfaces of the light-gathering structure 30; a glass cover plate 40 is provided over the top of the cavity.

One side of the protection frame 10 is concavely provided with a concave cavity, so that the concave cavity provides installation space for the light emitting structure 20 and the light condensing structure 30, and the installation stability and the use reliability of the light emitting structure 20 and the light condensing structure 30 are guaranteed. The light condensing structure 30 is used for condensing light emitted by the light emitting structure 20, and the side wall surfaces of at least two sides of the light condensing structure 30 are set to be the total reflection surface 31 and the light emitting surface is set to be the spherical surface 32, so that light rays at the edge of the light emitting structure 20 can be condensed and emitted by the spherical surface 32 through total reflection of the total reflection surface 31, the situation that the brightness is low due to unavailable utilization of the edge light rays is avoided, the light rays can be concentrated through optimizing the shape of the light condensing structure 30, and the improvement of the illumination brightness of the detection object plane is facilitated. The glass cover plate 40 is arranged on the top of the concave cavity, plays a role in protecting the internal devices, prevents dust and dirt from entering the concave cavity, and ensures tightness.

Specifically, the light emitting structure 20 includes a circuit board 22 and a plurality of LEDs 21 mounted on the circuit board 22, where the LEDs 21 are arranged in a linear equidistant array, the circuit board 22 provides a circuit for the LEDs 21, and the circuit board 22 is preferably made of aluminum, so that heat dissipation of the LEDs 21 is further accelerated, and the LEDs 21 are effectively protected; the LED21 adopts a hemispherical structure, so as to further achieve the effect of condensing light.

As shown in fig. 1 to 3, the scanning light source device is a linear light source, and extends along the scanning direction, that is, the scanning light source device is in a long strip shape. The light-gathering structure 30 is a strip-shaped symmetrical structure, the spherical surface 32 of the light-emitting surface of the light-gathering structure 30 is continuously arranged, the spherical surface 32 and the total reflection surface 31 are in smooth transition, that is, two sides of the spherical surface 32 are respectively in smooth transition with the side wall surfaces of two sides of the light-gathering structure 30, so that the influence of light convergence or stray light generated due to large fluctuation of the connection position of the spherical surface 32 and the total reflection surface 31 is avoided. And the spherical surface 32 is convexly disposed in a direction away from the light emitting structure 20. This arrangement makes the light-emitting surface an entire spherical surface 32, which is advantageous for increasing the condensing effect.

Specifically, the diameter of the sphere 32 is less than 13mm. Through the size of reasonable constraint sphere 32, restraint spotlight structure 30's size is unlikely to too big when guaranteeing spotlight structure 30's spotlight effect to guarantee spotlight structure 30 size in reasonable scope, and then guarantee scanning light source device's miniaturization.

The material of the light condensing structure 30 may be PC, PMMA, or the like.

As shown in fig. 1, the cavity sequentially includes a first portion 11, a second portion 12, and a third portion 13 along the light emitting direction of the scanning light source device, and the cavity is composed of the first portion 11, the second portion 12, and the third portion 13, which are different from each other. At least part of the light emitting structure 20 is accommodated in the first portion 11, the LEDs 21 of the light emitting structure 20 are protruded to the second portion 12, the light condensing structure 30 is accommodated in the second portion 12 and the third portion 13, the height of the second portion 12 in the light emitting direction is equal to the height of the side wall surface of the light condensing structure 30 in the light emitting direction, and the height of the third portion 13 in the light emitting direction is equal to or greater than the radius of the spherical surface 32, that is, the portion corresponding to the side wall surface of the light condensing structure 30 is accommodated in the second portion 12, and the portion corresponding to the spherical surface 32 of the light condensing structure 30 is accommodated in the third portion 13. The height of the third portion 13 in the light emitting direction is equal to or greater than the radius of the spherical surface 32, so that the spherical surface 32 is attached to or spaced from the glass cover 40, and can be adjusted according to practical situations.

Specifically, the cavity wall of the first portion 11 is in a step shape, the shrinkage section of the first portion 11 in the step shape is arranged towards the light-gathering structure 30, and the LED21 is arranged at the shrinkage section of the first portion 11, so that the first portion 11 can limit the light-emitting structure 20 therein. The cross-sectional area of the second portion 12 along the direction perpendicular to the light emitting direction gradually increases along the direction away from the light emitting structure 20, and the dimensional change of the second portion 12 along the light emitting direction is consistent with the dimensional change of the side wall portion of the light collecting structure 30 along the light emitting direction, so that the two side cavity wall surfaces of the second portion 12 are respectively and tightly attached to the two side walls of the light collecting structure 30. The cross-sectional area of the third portion 13 in a direction perpendicular to the light emitting direction is uniform in a direction away from the light emitting structure 20 to leave a space for the spherical surface 32 portion of the light condensing structure 30.

As shown in fig. 2, the light incident surface 33 of the light collecting structure 30 is recessed toward a direction away from the light emitting structure 20 to form a receiving cavity 36, and at least a portion of the light emitting structure 20 is received in the receiving cavity 36. Specifically, at least a portion of the LED21 of the light emitting structure 20 is accommodated in the accommodating cavity 36, the size of the accommodating cavity 36 is adapted to the size of the LED21, and when the light emitting structure 20 and the light collecting structure 30 are assembled, the surface of the LED21 may be adhered to the cavity wall surface of the accommodating cavity 36.

In this embodiment, the diameter of the receiving chamber 36 is less than 4mm. When the LED21 is placed, the center of the LED21 is aligned with the center of the light incident surface 33.

As shown in fig. 2 and 3, the light focusing structure 30 further includes a first end surface 34 and a second end surface 35, one side of the light incident surface 33 is connected with one side wall surface of the light focusing structure 30 through the first end surface 34, the other side of the light incident surface 33 is connected with the other side wall surface of the light focusing structure 30 through the second end surface 35, the distance from the first end surface 34 to the glass cover plate 40 is equal to the distance from the second end surface 35 to the glass cover plate 40, and the first end surface 34 is parallel to the second end surface 35 and has the same size. By providing the first end face 34 and the second end face 35, assembly of the light collecting structure 30 with the light emitting structure 20 is facilitated.

Specifically, the sidewall surface of the light-condensing structure 30 is parabolic in a direction away from the light-emitting structure 20. The side wall surface in the shape of a parabolic shape is composed of a plurality of surface sections. The side wall surface of the light gathering structure 30 comprises a plurality of surface sections which are sequentially connected along the direction away from the light emitting structure 20, an obtuse angle is formed between every two adjacent surface sections in the surface sections, the surface sections can achieve total reflection of light of the LED21, the surface section which is close to the light emitting structure 20 in the surface sections is a first surface section 61, an included angle between the first surface section 61 and the central line 50 of the light gathering structure 30 is smaller than or equal to 42 degrees, and an included angle between the surface sections and the central line 50 of the light gathering structure 30 is gradually reduced along the direction away from the light emitting structure 20. By reasonably restricting the angles of each surface section and the central line 50, the method is beneficial to planning the trend of the side wall surface of the light condensing structure 30, is beneficial to smooth transition of the side wall surface and the spherical surface 32, is also beneficial to total reflection of a plurality of surface sections of the side wall surface on different large-angle light rays respectively, ensures that the light rays totally reflected by the total reflection surface 31 can be converged and output by the spherical surface 32, and ensures the light condensing effect of the light condensing structure 30.

As shown in fig. 2 and 3, the plurality of surface segments are specifically seven, and the seven surface segments are sequentially a first surface segment 61, a second surface segment 62, a third surface segment 63, a fourth surface segment 64, a fifth surface segment 65, a sixth surface segment 66, and a seventh surface segment 67 along the light emitting direction, wherein an included angle between the first surface segment 61 and the central line 50 is 41.5 °; the second face segment 62 is 35 ° from the centerline 50; the third face section 63 is at an angle of 30.4 ° to the centerline 50; the fourth face segment 64 is at an angle of 27.5 ° to the centerline 50; the fifth face segment 65 is 24 ° from the centerline 50; the sixth section 66 is at an angle of 22 ° to the centerline 50; the seventh face segment 67 is at an angle of 21 ° to the centerline 50.

As shown in fig. 4, the light path diagram of the scanning light source device of the present application shows that the light rays with a large angle, that is, the light rays with an included angle of 40 ° or more with the center line 50, emitted from the light source structure are irradiated onto the side wall surface of the light collecting structure 30, and the light rays after total reflection are collected through the spherical surface 32 of the light emitting surface. Other angles of light rays are converged directly through the spherical surface 32 and converged to the detection object plane, so that the illumination brightness is further improved.

As shown in fig. 5, the simulated light spot effect diagram of the scanning light source device of the present application is that by setting the light-focusing structure 30, the light rays of each part angle all have a certain converging effect, so that an effect of forming a uniform light spot with a certain width on the detection object plane is achieved. The light spot is in a strip shape.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A scanning light source device, comprising:

the protection frame (10), one side of the protection frame (10) is concavely arranged to form a concave cavity;

-a light emitting structure (20), the light emitting structure (20) being arranged in the cavity;

the light-gathering structure (30), the light-gathering structure (30) is arranged on the light-emitting side of the light-emitting structure (20), the side wall surfaces of at least two sides of the light-gathering structure (30) are total reflection surfaces (31), the light-emitting surface of the light-gathering structure (30) is a spherical surface (32), and two sides of the spherical surface (32) are respectively connected with two side wall surfaces of the light-gathering structure (30);

and the glass cover plate (40) is arranged on the top of the concave cavity in a covering mode.

2. A scanning light source device according to claim 1, characterized in that the spherical surface (32) and the total reflection surface (31) are smoothly transited, and the spherical surface (32) is convexly arranged in a direction away from the light emitting structure (20).

3. A scanning light source device according to claim 1, characterized in that the diameter of the sphere (32) is smaller than 13mm.

4. The scanning light source device according to claim 1, wherein the cavity comprises a first portion (11), a second portion (12) and a third portion (13) in order along the light emitting direction of the scanning light source device, at least part of the light emitting structure (20) is accommodated in the first portion (11), the light condensing structure (30) is accommodated in the second portion (12) and the third portion (13), and the height of the second portion (12) in the light emitting direction is equal to the height of the side wall surface of the light condensing structure (30) in the light emitting direction, and the height of the third portion (13) in the light emitting direction is equal to or greater than the radius of the spherical surface (32).

5. A scanning light source device according to claim 4, wherein the cavity wall of the first portion (11) is stepped, the cross-sectional area of the second portion (12) along a direction perpendicular to the light emitting direction is gradually increased along a direction away from the light emitting structure (20), and the cross-sectional area of the third portion (13) along a direction perpendicular to the light emitting direction is kept uniform along a direction away from the light emitting structure (20).

6. A scanning light source device according to claim 1, characterized in that the light entrance surface (33) of the light collecting structure (30) is recessed in a direction away from the light emitting structure (20) to form a receiving cavity (36), and at least a part of the light emitting structure (20) is received in the receiving cavity (36).

7. A scanning light source device according to claim 6, characterized in that the diameter of the accommodation chamber (36) is smaller than 4mm.

8. The scanning light source device according to claim 6, wherein the light condensing structure (30) further comprises a first end surface (34) and a second end surface (35), one side of the light incident surface (33) is connected to one side wall surface of the light condensing structure (30) through the first end surface (34), the other side of the light incident surface (33) is connected to the other side wall surface of the light condensing structure (30) through the second end surface (35), and a distance from the first end surface (34) to the glass cover plate (40) is equal to a distance from the second end surface (35) to the glass cover plate (40).

9. A scanning light source device according to claim 1, wherein the side wall surface of the light condensing structure (30) is parabolic in a direction away from the light emitting structure (20).

10. The scanning light source device according to claim 1, wherein the side wall surface of the light condensing structure (30) comprises a plurality of surface segments connected in sequence in a direction away from the light emitting structure (20), two adjacent surface segments among the plurality of surface segments are arranged at an angle,

the surface section, which is close to the light-emitting structure (20), of the plurality of surface sections is a first surface section, and an included angle between the first surface section and a central line (50) of the light-gathering structure (30) is less than or equal to 42 degrees; and/or

The included angles between the plurality of surface sections and the central line (50) of the light-gathering structure (30) gradually decrease along the direction away from the light-emitting structure (20).