Lens and lamp with the same

Abstract

The present invention discloses a lens, comprising: a light source setting location, a first side portion and a second side portion, wherein the second side portion comprises: a first light-entering surface; a first connecting surface connected to the outer end of the first light-entering surface; a first total-reflecting surface arranged outwardly with respect to the main optical axis, for totally reflecting the incident light from the first light-entering surface outwardly; a second total-reflecting surface arranged outwardly with respect to the main optical axis, one end of which is connected to the free end of the first connecting surface, for receiving and totally reflecting the reflected light from the first total-reflecting surface; a third total-reflecting surface, one end of which is connected to the free end of the second total-reflecting surface, for totally reflecting the reflected light from the second total-reflecting surface; a first light-emitting surface, for emitting the reflected light from the third total-reflecting surface, the maximum light intensity direction of the second light beam emitted from the first light-emitting surface intersecting with the main optical axis; the present invention also discloses a lamp with the above-mentioned lens.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting, in particular to a lens and a lamp with the lens. Background Art

[0002] With the popularity of LED lamps, more and more occasions are beginning to use LED lamps, such as home lighting in bedrooms, kitchens, living rooms, etc., as well as commercial lighting in freezers, cold chains, shelves, etc.

[0003] As a point light source, the LED chip has a fixed light intensity distribution. However, in actual use, it needs to be focused or uniformly illuminate a large area. For this reason, in the existing technology, optical elements are generally set in the light emitting direction of the LED chip to perform secondary light distribution, so as to achieve the required light intensity distribution.

[0004] With the development of lighting technology, new demands have also been put forward. In indoor lighting, especially in products such as freezers and shelves, efficient single-sided large-area lighting is often required in corners, and miniaturization is required at the same time. At this time, existing lamps cannot meet the needs. Summary of the Invention

[0005] In view of this, the present invention provides a lens and a lamp with the lens to solve the above technical problems.

[0006] A lens comprising:

[0007] The light source is set up with a main optical axis, a longitudinal axis and a transverse axis passing through its center and perpendicular to each other;

[0008] The first side portion and the second side portion are located on both sides of the main optical axis in the plane where the main optical axis and the transverse axis are located, respectively. The light source provided at the light source location emits a first light beam after light distribution through the first side portion, and the reverse extension line of the maximum light intensity direction of the first light beam intersects the main optical axis.

[0009] The second side portion comprises:

[0010] First light-entering surface;

[0011] a first connecting surface connected to an outer end of the first light incident surface;

[0012] a first total reflection surface, arranged to be inclined relative to the principal optical axis in a direction away from the transverse axis, and configured to totally reflect incident light from the first light incident surface outward;

[0013] a second total reflection surface, arranged to be inclined relative to the principal optical axis in a direction away from the transverse axis, one end of which is connected to the free end of the first connecting surface, and configured to receive and totally reflect the reflected light from the first total reflection surface;

[0014] a third total reflection surface, arranged to be inclined relative to the principal optical axis in a direction close to the transverse axis, one end of which is connected to the free end of the second total reflection surface, and configured to totally reflect the reflected light from the second total reflection surface;

[0015] The first light-emitting surface connects the free ends of the first total reflection surface and the third total reflection surface and emits the reflected light from the third total reflection surface. The maximum light intensity direction of the second light beam emitted from the first light-emitting surface intersects with the main optical axis.

[0016] Preferably, the first side portion comprises:

[0017] Second light-entry surface;

[0018] a second connecting surface connected to an outer end of the second light incident surface;

[0019] a fourth total reflection surface, arranged to be inclined relative to the principal optical axis in a direction away from the transverse axis, and configured to totally reflect outwardly the incident light from the second light incident surface close to the principal optical axis;

[0020] a second light emitting surface, configured to emit the reflected light from the fourth total reflection surface to form a first light beam;

[0021] a fifth total reflection surface, arranged obliquely relative to the principal optical axis in a direction away from the transverse axis, one end of which is connected to the free end of the second connecting surface, and configured to totally reflect incident light from the second light-incident surface away from the principal optical axis to generate reflected light close to the principal optical axis;

[0022] The third light-emitting surface is located above the fifth total reflection surface and is used for emitting the reflected light from the fifth total reflection surface to form a third light beam.

[0023] Preferably, the first light incident surface is a light-collecting curved surface.

[0024] Preferably, the second light incident surface is a light-collecting curved surface.

[0025] Preferably, the first total reflection surface is a curved surface that improves the consistency of the light beam.

[0026] Preferably, the fourth total reflection surface is a curved surface that improves the consistency of the light beam.

[0027] Preferably, the maximum light intensity directions of the second light beam and the first light beam are parallel or intersect at an angle less than 5°.

[0028] Preferably, the angle formed by the intersection of the reverse extension line of the maximum light intensity direction of the first light beam and the main optical axis is 60° to 80°.

[0029] Preferably, the first side portion and the second side portion are integrally formed, and the connecting line is located at the main optical axis.

[0030] Preferably, the lens is a strip lens extending along the longitudinal axis.

[0031] A lamp comprises a lamp holder, a lens and a light source. The lens adopts the above-mentioned lens, and the light source is arranged on the light source setting location.

[0032] Preferably, the lamp holder is a strip-shaped lamp holder extending along the longitudinal axis, the lens is a strip-shaped lens extending along the longitudinal axis, and the light source is a linear light source extending along the longitudinal axis.

[0033] Preferably, the lamp further comprises a lampshade arranged on the lamp stand and above the lens.

[0034] Preferably, an optical film is provided between the lens and the lampshade to stretch the light source along the longitudinal axis.

[0035] Technical effects of the present invention:

[0036] The lens of the present invention and the lamp with the lens can realize uniform illumination in a large range on one side, and has a small volume and high light efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0038] Figure 1 FIG. 4 is a schematic diagram of the three-dimensional structure of the lens of this embodiment.

[0039] Figure 2 Schematic diagram of the structure of the lens of this embodiment.

[0040] Figure 3 FIG. 2 is a schematic diagram of an optical path diagram of the lens of this embodiment.

[0041] Figure 4 Schematic diagram of the optical path of the lens (with an irradiation surface) of this embodiment.

[0042] Figure 5 Schematic diagram of the structure of the lamp of this embodiment. DETAILED DESCRIPTION

[0043] The following is a further detailed description of specific embodiments of the present invention based on the accompanying drawings. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0044] like Figures 1 to 4As shown, the lens 100 of this embodiment includes a light source setting location 103, a first side portion 101, and a second side portion 102. The lens 100 is used to distribute light from the light source 200. The light source setting location 103 refers to the location where the light source 200 is located. The light source 200 has many types of light distribution, which can be three-dimensional 360° light emission, single-sided three-dimensional 180° light emission, or other angles. In order to achieve efficient and directional lighting, it is more advantageous to use single-sided three-dimensional 180° light emission for secondary light distribution. Therefore, the light source 200 in this embodiment is a single-sided three-dimensional 180° light emission. Currently, the most common light source 200 of this type is an LED chip with a circuit board, and its maximum light intensity direction is perpendicular to the circuit board. For the convenience of description, the light source setting location 103 is defined as having a main optical axis 104, a longitudinal axis 105, and a transverse axis 106 passing through its center and perpendicular to each other. Generally, the light source 200 has a maximum light intensity direction, which coincides with the main optical axis 104.

[0045] The lens 100 of the present invention is divided into a first side portion 101 and a second side portion 102, which are located on either side of the main optical axis 104 in the plane containing the main optical axis 104 and the transverse axis 106. A light source 200 disposed in the light source arrangement 103 emits a first light beam 201 after being distributed by the first side portion 101. The inverse extension of the direction of maximum light intensity of the first light beam 201 intersects the main optical axis 104. The first side portion 101 deflects the light emitted by the light source 200 on its side, away from the second side portion 102. The specific shape and structure can be configured according to the desired deflection angle and beam angle.

[0046] When efficient single-sided lighting is required, the second side portion 102 deflects the light from the light source 200 on its side, and the deflection direction is toward the first side portion 101. The second side portion 102 includes a first light incident surface 1021, a first connecting surface 1022, a first total reflection surface 1023, a second total reflection surface 1024, a third total reflection surface 1025 and a first light emitting surface 1026. The first light-incoming surface 1021 receives the light beam from the light source 200, and the first connecting surface 1022 is connected to the outer end of the first light-incoming surface 1021. The first connecting surface 1022 is used for transition and connection, and does not participate in the main light distribution work. Its shape is related to the shapes of other light distribution surfaces; the first total reflection surface 1023 is tilted relative to the main optical axis 104 in the direction away from the horizontal axis 106, and is used to totally reflect the incident light from the first light-incoming surface 1021 to the outside. The consistency of the light beam from the light source 200 is not good, and the first total reflection surface 1023 is a curved surface for improving the consistency of the light beam; the second total reflection surface 1024 is tilted relative to the main optical axis 104 in the direction away from the horizontal axis 106, and one end is connected to the first connecting surface 1022. The free end is connected, and is used to receive and totally reflect the reflected light from the first total reflection surface 1023; the third total reflection surface 1025 is inclined relative to the main optical axis 104 in a direction close to the horizontal axis 106, and one end is connected to the free end of the second total reflection surface 1024, and is used to totally reflect the reflected light from the second total reflection surface 1024; through the above three total reflection surfaces, part of the light beam of the light source 200 on the side where the second side portion 102 is located is deflected, and finally emitted through the first light emitting surface 1026, the first light emitting surface 1026 is connected to the free ends of the first total reflection surface 1023 and the third total reflection surface 1025, and the maximum light intensity direction of the second light beam 202 emitted from the first light emitting surface 1026 intersects with the main optical axis 104.

[0047] The first side portion 101 has both a light-incoming surface and a light-emitting surface that are converging curved surfaces, which can also achieve light beam deflection. However, this is not uniform, and the deflection angle cannot be very large, making it difficult to achieve wide-area illumination. In this embodiment, the first side portion 101 includes a second light-incoming surface 1011, a second connecting surface 1012, a fourth total reflection surface 1013, a second light-emitting surface 1014, a fifth total reflection surface 1015, and a third light-emitting surface 1016. The second connecting surface 1012 is connected to the outer end of the second light-incoming surface 1011. Similarly, the second connecting surface 1012 is used for transition and connection and does not participate in the main light distribution work. Its shape is related to the shapes of other light distribution surfaces. The fourth total reflection surface 1013 is tilted relative to the main optical axis 104 in the direction away from the transverse axis 106 and is used to totally reflect the incident light from the second light-incoming surface 1011 close to the main optical axis 104 to the outside. In order to make the emitted light more consistent and more uniform on the irradiated surface, the fourth total reflection surface 1013 is a curved surface that improves the consistency of the light beam. The second light-emitting surface 10 14 is used to emit the reflected light from the fourth total reflection surface 1013 to form the first light beam 201; the fifth total reflection surface 1015 is tilted relative to the main optical axis 104 in the direction away from the horizontal axis 106, and one end is connected to the free end of the second connecting surface 1012, and totally reflects the incident light from the second light input surface 1011 away from the main optical axis 104 to generate reflected light close to the main optical axis 104; the third light emitting surface 1016 is located above the fifth total reflection surface 1015, and is used to emit the reflected light from the fifth total reflection surface 1015 to form the third light beam 203. The first side portion 101 deflects the incident light close to the main optical axis 104 outward to obtain a first light beam 201, which is used for large-area lighting. Large-angle deflection can be achieved through total reflection. In addition, in order to compensate for the illumination of the lens 100 in the direction of the main optical axis 104, in this embodiment, the incident light from the second light-entry surface 1011 away from the main optical axis 104 is also totally reflected by the fifth total reflection surface 1015.

[0048] In order to improve the lighting efficiency, in this embodiment, the first light-entering surface 1021 is a focusing curved surface, the second light-entering surface 1011 close to the main optical axis 104 is a focusing curved surface, and the part away from the main optical axis 104 is the side wall after the countersunk hole 107 is formed. The setting of the countersunk hole 107 can improve the lighting efficiency. This is a conventional setting and will not be repeated.

[0049] In order to improve the light efficiency, in this embodiment, the maximum light intensity directions of the second light beam 202 and the first light beam 201 are parallel or intersecting at an angle less than 5°.

[0050] The angle formed by the intersection of the reverse extension line of the maximum light intensity direction of the first light beam 201 and the main optical axis 104 is 60° to 80°.

[0051] To facilitate manufacturing and light distribution calculation, in this embodiment, the first side portion 101 and the second side portion 102 are integrally formed, and the connecting line is located at the main optical axis 104 .

[0052] For the illumination surface 600, using the lens 100 of this embodiment can obtain uniform illumination over a wide range on one side.

[0053] The present invention is mostly used for light distribution of a linear light source, and the lens 100 is a strip lens extending along a longitudinal axis 105 .

[0054] like Figure 5 As shown, the lamp of this embodiment includes a lamp holder 300, a lens 100, and a light source 200. The light source 200 is disposed on the light source mounting area 103. The lamp holder 300 is a strip-shaped lamp holder extending along a longitudinal axis 105. The lens 100 is a strip-shaped lens extending along the longitudinal axis 105. The light source 200 is a linear light source extending along the longitudinal axis 105. The lamp also includes a lampshade 400 disposed on the lamp holder 300 above the lens 100. An optical film 500 is disposed between the lens 100 and the lampshade 400 to stretch the light source 200 along the longitudinal axis 105. The light source 200 includes a strip-shaped circuit board 204 extending along the longitudinal axis 105 and a plurality of LED chips 205 disposed on the strip circuit board 204.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements or improvements within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A lens (100), comprising: A light source arrangement (103) having a main optical axis (104), a longitudinal axis (105) and a transverse axis (106) passing through the center thereof and being perpendicular to each other; The first side portion (101) and the second side portion (102) are respectively located on both sides of the main optical axis (104) in a plane where the main optical axis (104) and the transverse axis (106) are located. The light source (200) arranged at the light source setting location (103) emits a first light beam (201) after being distributed by the first side portion (101). The reverse extension line of the maximum light intensity direction of the first light beam (201) intersects the main optical axis (104). Characterized in that the second side portion (102) comprises: a first light-entering surface (1021); A first connecting surface (1022) connected to the outer end of the first light incident surface (1021); a first total reflection surface (1023) arranged to be tilted relative to the main optical axis (104) in a direction away from the transverse axis (106), and configured to totally reflect incident light from the first light-incoming surface (1021) outward; a second total reflection surface (1024) arranged obliquely relative to the principal optical axis (104) in a direction away from the transverse axis (106), one end of the second total reflection surface being connected to the free end of the first connecting surface (1022) and configured to receive and totally reflect reflected light from the first total reflection surface (1023); a third total reflection surface (1025) arranged to be tilted relative to the principal optical axis (104) in a direction close to the transverse axis (106), one end of which is connected to the free end of the second total reflection surface (1024) and is used for totally reflecting the reflected light from the second total reflection surface (1024); A first light-emitting surface (1026) connects the first total reflection surface (1023) and the free end of the third total reflection surface (1025) and emits the reflected light from the third total reflection surface (1025), and the maximum light intensity direction of the second light beam (202) emitted from the first light-emitting surface (1026) intersects with the main optical axis (104).

2. The lens (100) according to claim 1, characterized in that The first side portion (101) comprises: a second light-incoming surface (1011); a second connecting surface (1012) connected to the outer end of the second light incident surface (1011); a fourth total reflection surface (1013) arranged to be inclined relative to the principal optical axis (104) in a direction away from the transverse axis (106), and configured to totally reflect outwardly the incident light from the second light-incoming surface (1011) close to the principal optical axis (104); a second light emitting surface (1014), configured to emit the reflected light from the fourth total reflection surface (1013) to form a first light beam (201); a fifth total reflection surface (1015) arranged obliquely relative to the main optical axis (104) in a direction away from the transverse axis (106), one end of which is connected to the free end of the second connecting surface (1012), and which totally reflects the incident light from the second light-incoming surface (1011) that is away from the main optical axis (104), generating reflected light close to the main optical axis (104); The third light emitting surface (1016) is located above the fifth total reflection surface (1015) and is used for emitting the reflected light from the fifth total reflection surface (1015) to form a third light beam (203).

3. The lens (100) according to claim 1, characterized in that The first light-incoming surface (1021) is a light-collecting curved surface.

4. The lens (100) according to claim 2, characterized in that The portion of the second light-entering surface (1011) close to the main optical axis (104) is a light-collecting curved surface.

5. The lens (100) according to claim 1, characterized in that The first total reflection surface (1023) is a curved surface that improves the consistency of the light beam.

6. The lens (100) according to claim 2, characterized in that The fourth total reflection surface (1013) is a curved surface that improves the consistency of the light beam.

7. The lens (100) according to any one of claims 1 to 6, characterized in that: The maximum light intensity directions of the second light beam (202) and the first light beam (201) are parallel or intersect at an angle less than 5°.

8. The lens (100) according to any one of claims 1 to 6, characterized in that: The angle formed by the intersection of the reverse extension line of the maximum light intensity direction of the first light beam (201) and the main optical axis (104) is 60° to 80°.

9. The lens (100) according to any one of claims 1 to 6, characterized in that: The first side portion (101) and the second side portion (102) are integrally formed, and the connecting line is located at the main optical axis (104).

10. The lens (100) according to any one of claims 1 to 6, characterized in that: The lens (100) is a strip-shaped lens extending along a longitudinal axis (105).

11. A lamp comprising a lamp holder (300), a lens (100) and a light source (200), characterized in that: The lens (100) is the lens (100) according to any one of claims 1 to 10, and the light source (200) is arranged on the light source arrangement location (103).

12. The lamp according to claim 11, characterized in that The lamp holder (300) is a strip-shaped lamp holder extending along a longitudinal axis (105), the lens (100) is a strip-shaped lens extending along the longitudinal axis (105), and the light source (200) is a linear light source extending along the longitudinal axis (105).

13. The lamp according to claim 11, characterized in that The lamp further comprises a lampshade (400) arranged on the lamp frame (300) and located above the lens (100).

14. The lamp according to claim 11, characterized in that An optical film (500) is provided between the lens (100) and the lampshade (400) for stretching the light source (200) along the longitudinal axis (105).

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