Optical system and lamp

Abstract

The invention provides an optical system and a lamp. The optical system comprises a lens and a reflection cup, the lens comprises a lens body, the two opposite sides of the lens body are provided with an installation face and a light emitting face respectively, the installation face sinks towards the lens body to form an installation groove used for arranging a light source, the top face of the installation groove is a reflection face, and the side wall of the installation groove is a light incident face. A first optical surface connected with the mounting surface and the light emitting surface is formed on the peripheral surface of the lens body, the reflection cup is arranged on the outer side of the lens in a sleeving mode, and light rays emitted by a light source and close to the center portion pass through the lens body twice to form a rainbow aperture. And the other part of light emitted by the light source is emitted from the light emitting surface to form a small-angle light beam. According to the optical system, on the basis that the lighting effect of the lamp is guaranteed, the effect of generating a rainbow aperture around an original light spot is achieved by additionally arranging the reflection cup, and the decoration function is added to the lamp. Therefore, the ornamental value of the light spots is improved, and the selling points of the lamp are increased.

Description

Technical Field

[0001] The invention relates to an optical system and a lamp comprising the optical system. Background Art

[0002] Spotlights are usually installed around the indoor ceiling for accent lighting. For example, spotlights in exhibition halls usually project light onto exhibited items, making the exhibits bright and beautiful under the illumination of spotlights, highlighting the beauty to attract guests to stop and watch. Another example is the spotlights in clothing stores, which usually project light onto the shoes and clothing in the display cabinets to attract customers' attention and stimulate their desire to buy. Spotlights in bars and cafes usually project light onto the bar or booths, which can complement other lights, play a role in decoration and embellishment of the scene atmosphere, and can create a comfortable and relaxing atmosphere. In various applications, we always expect lamps to bring us richer visual effects while achieving lighting. As a natural phenomenon, rainbows always give people a dreamy and beautiful impression. If the rainbow effect can be added to the design of lamps, showing the beautiful colors of the rainbow while lighting, this will be a product with great market prospects. Summary of the invention

[0003] The purpose of the present application is to provide an optical system and a lamp that can achieve a rainbow effect while ensuring a lighting effect.

[0004] In order to achieve the above-mentioned effect, the technical solution adopted by the present application is to provide an optical system, including a lens and a reflective cup, wherein the lens includes a lens body, the lens body is a gyroscope with an optical axis Z as the central axis, the lens body is provided with a mounting surface and a light emitting surface on two opposite sides along the direction of the optical axis Z, the mounting surface is recessed to the lens body to form a mounting groove for setting a light source, the mounting groove includes a top surface, a side wall connecting the top surface and the mounting surface, the top surface is a reflecting surface, the side wall is a light incident surface, and the outer peripheral surface of the lens body is formed with a light emitting surface connecting the mounting surface and the light emitting surface. The reflective cup is sleeved on the outside of the lens, and its optical axis coincides with the optical axis Z of the lens. Its inner surface is the second optical surface. The light emitted by the light source near the center part enters the lens body from the light incident surface after being reflected from the reflective surface, and is emitted from the first optical surface. After being reflected by the second optical surface, it is incident on the lens body from the first optical surface again and is emitted from the light emitting surface, thereby forming dispersion. Another part of the light emitted by the light source directly enters the lens body from the light incident surface and is emitted from the light emitting surface after being totally reflected from the first optical surface.

[0005] Furthermore, the lens is a TIR lens, and the light entering the lens body from the light incident surface is totally reflected by the first optical surface and then collimated and emitted from the light emitting surface.

[0006] Furthermore, a reflective layer is provided on the top surface of the mounting groove to form the reflective surface.

[0007] Furthermore, the reflecting surface is in an inverted cone shape, and protrudes outward from the lens body along the optical axis Z.

[0008] Furthermore, the reflecting surface is a parabola, and its generatrix is ​​a segment of a parabola.

[0009] Furthermore, there is a gap between the second optical surface and the first optical surface.

[0010] Furthermore, the surface shape of the second optical surface is a parabola.

[0011] Furthermore, the optical system also includes a secondary reflector, which is arranged on one side of the light-emitting surface of the lens. The light that enters the lens body again after being reflected by the second optical surface is reflected on the surface of the secondary reflector after being emitted from the light-emitting surface.

[0012] The present application also provides a lamp, comprising a light source and the optical system as described above, wherein the light source is disposed in the mounting groove of the lens.

[0013] Furthermore, the lamp is a spotlight, the light emitted by the light source near the center portion passes through the lens body twice to form a rainbow aperture, and another portion of the light emitted by the light source is emitted from the light emitting surface to form a small-angle light beam.

[0014] In the optical system provided by the present invention, a lens is used to control the light-emitting angle and the shape of the light spot of the lamp to realize the lighting function; the reflective cup emits the central light emitted from the lens to the large end of the lens to produce dispersion, and presents a decorative effect of a rainbow aperture on the receiving surface. On the basis of ensuring the lighting effect of the lamp, a reflective cup is added to achieve the effect of a rainbow aperture around the original light spot, thereby adding a decorative function to the lamp. This not only improves the ornamental value of the light spot, but also increases the selling point of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an optical system of a preferred embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of the lens in the embodiment; Figure 3 yes Figure 2 Schematic diagram of the structure of the lens in another direction; Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure of the lens; Figure 5 yes Figure 1A light path diagram of a portion of light emitted by a light source and directly entering from a light incident surface in an optical system of an embodiment; Figure 6 yes Figure 1 Light path diagram of part of the light reflected by the reflecting surface in the optical system of the embodiment. Implementation

[0016] The optical system and the lamp proposed by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] The structure of the optical system of a preferred embodiment of the present application is as follows Figure 1 As shown, Figure 1 It is a cross-sectional view of the optical system along the optical axis Z. The optical system includes a light source 4, a lens 1, a reflector cup 2 and a secondary reflector 3. The lens 1 is set in the reflector cup 2, and the light source 4 and the secondary reflector 3 are respectively arranged on the light incident side and the light exit side of the lens 1. The optical axes of the light source 4, the lens 1 and the reflector cup 2 coincide.

[0018] like Figure 2 , Figure 3 As shown, in this embodiment, the lens 1 is a cyclotron lens. Figure 4 The cross section is revolved along the optical axis Z to form a lens body 106. The lens body 106 is provided with a mounting surface 101 and a light emitting surface 102 on opposite sides along the optical axis Z direction. The mounting surface 101 is recessed into the lens body 106 to form a mounting groove 104 for arranging the light source 4. The mounting groove 104 includes a top surface 1041 and a side wall 1042 connecting the top surface 1041 and the mounting surface 101. The top surface 104 forms a reflecting surface 1041, and the side wall 1042 is a light incident surface 1042. The outer peripheral surface of the lens body 106 is formed with a first optical surface 103 connecting the mounting surface 101 and the light emitting surface 106.

[0019] In this embodiment, the lens 1 is a TIR lens, the first optical surface 103 is a total reflection surface, and the light entering the lens body 106 from the light incident surface 1042 is totally reflected on the first optical surface 106 to form a collimated light beam, which is emitted from the light emitting surface 102. However, there are still differences between the lens in this embodiment and the traditional TIR, and the main difference lies in the reflection surface 1041 at the top. The reflection surface 1041 is in an inverted cone shape, and the surface is a parabola, such as Figure 4 As shown, its generatrix is ​​a parabola, and the conical top protrudes from the lens body 106 along the optical axis Z toward the light source 4. The reflective surface 1041 can be formed by setting a reflective layer made of reflective materials such as metal, reflective paper, and reflective film, or by generating a reflective layer on the surface of the lens 1 by electroplating, etc., which is not limited in the present application.

[0020] The presence of the reflective surface 1041 changes the optical path of the central part of the light near the optical axis Z. Figure 6, the light near the center part emitted by the light source 4 is reflected at the reflection surface 1041 and turned to the light incident surface 1042. This part of the light does not enter the lens body 106 directly from the top, but becomes a large-angle light that is almost parallel to the mounting surface 101 and then enters from the light incident surface 1042. At this time, since the angle of the light is too large, it is no longer possible to form a total reflection at the first optical surface 103, so it is refracted at the first optical surface 103 and then emitted. The inner surface of the reflector cup 2 is the second optical surface 201. There is a gap between the second optical surface 201 and the first optical surface 103. The light is reflected for the second time at the second optical surface 201, and then refracted again through the first optical surface 103 to enter the lens body 106, and finally emitted from the light exiting surface 102. According to the light splitting principle of the prism, light of different wavelengths (colors) in the same material has different refractive indices. Therefore, light of different wavelengths (colors) in white light will be deflected to different degrees after passing through the prism, so that the light will be dispersed on the receiving surface, which is what we call the rainbow effect. The light reflected by the second optical surface 201 on the inner surface of the reflective cup 2 passes through a corner of the upper part of the lens 1. At this time, there is an angle between the first optical surface 103 and the light-emitting surface 102. The light passes through these two surfaces successively and passes through the lens 1, which is equivalent to passing through two adjacent surfaces of a prism, thereby causing dispersion to form a rainbow spot. Figure 6 As can be seen in the figure, the angle of light emitted from the light emitting surface 102 is relatively large, and the angle of this part of light can be adjusted by the secondary reflector 3. The colored light spot is mainly used for decoration, so the optical axis of the secondary reflector 3 does not have to coincide with the lens 1. When the optical axis of the secondary reflector 3 coincides with the optical axis Z of the lens 1, a rainbow aperture surrounding the main lighting spot will be formed on the wall, and the colors of the aperture are red, orange, yellow, green, cyan, blue, and purple from the inside to the outside. In other preferred embodiments, a reflective device with a polarizing effect can also be used to direct light toward the wall to form a wall washing effect.

[0021] The light other than part of the light source 4 enters the lens body 106 directly from the light incident surface 1042 without being reflected. The light path diagram is as follows: Figure 5 As shown, the surface shape of the first optical surface 103 makes this part of the light collimated and emitted from the light exiting surface 102. At this time, the light does not pass through the light distribution of the reflective cup 2 and the second reflector 3, and a beam of light with a small angle (about 10 degrees) can be obtained. This part of the light provides basic lighting function. The material of the lens 1 is selected from PC plastic with high light transmittance to improve optical efficiency. At the same time, since the light in the center is reflected by the reflective surface 1041, the center part of the lens body 106 has no light distribution function. Therefore, in order to save materials, the lens 1 of this embodiment is also provided with a groove 105 near the optical axis.

[0022] The optical system in this embodiment can be used for spotlights. The light near the center part emitted by the light source 4 passes through the lens body 106 twice to form a rainbow aperture, and the other part of the light emitted by the light source 4 passes through the TIR lens 1 and is emitted from the light exit surface 102 to form a small angle beam. The spotlight with this optical system produces a rainbow aperture effect around the main lighting beam, adding a decorative function to the lamp. At the same time, the optical efficiency of the spotlight is about 80%. The spotlight of this embodiment can achieve high optical efficiency while having both lighting and decorative functions.

[0023] Based on the optical system described in the present application, the design of the TIR lens 1 can be adjusted to form spotlights and large-angle downlights with various angles such as 24 degrees, 36 degrees, and 50 degrees. At the same time, the radius of the rainbow aperture can be changed to adapt to the size of the main lighting spot by adjusting the slope of the generatrix on the inner surface of the secondary reflector 3.

[0024] The above description of the preferred embodiments of the present application is for illustration and description, and is not intended to be exhaustive or limited to the specific form disclosed. Obviously, many modifications and changes may be made, which may be obvious to those skilled in the art and should be included in the scope of the present application defined by the attached claims.

Claims

1. An optical system, characterized in that: The invention comprises a lens and a reflector cup, wherein the lens comprises a lens body, the lens body is a gyroscope with an optical axis Z as a central axis, the lens body is provided with a mounting surface and a light emitting surface on two opposite sides along the direction of the optical axis Z, the mounting surface is recessed to the lens body to form a mounting groove for arranging a light source, the mounting groove comprises a top surface, a side wall connecting the top surface and the mounting surface, the top surface is a reflecting surface, the side wall is a light incident surface, the outer peripheral surface of the lens body is formed with a first optical surface connecting the mounting surface and the light emitting surface, the reflector cup is provided with a sleeve On the outside of the lens, its optical axis coincides with the lens optical axis Z, and its inner surface is a second optical surface. The light emitted by the light source near the center part enters the lens body from the light incident surface after being reflected by the reflecting surface, and is emitted from the first optical surface. After being reflected by the second optical surface, it is incident on the lens body from the first optical surface again and is emitted from the light emitting surface, thereby forming dispersion. Another part of the light emitted by the light source directly enters the lens body from the light incident surface and is emitted from the light emitting surface after being totally reflected by the first optical surface.

2. The optical system according to claim 1, characterized in that The lens is a TIR lens, and the light entering the lens body from the light incident surface is totally reflected by the first optical surface and then collimated and emitted from the light emitting surface.

3. The optical system according to claim 2, characterized in that A reflective layer is disposed on the top surface of the mounting groove to form the reflective surface.

4. The optical system according to claim 3, characterized in that The reflective surface is in an inverted cone shape and protrudes outward from the lens body along the optical axis Z.

5. The optical system according to claim 4, characterized in that The reflecting surface is a parabola, and its generatrix is ​​a section of a parabola.

6. The optical system according to claim 2, characterized in that There is a gap between the second optical surface and the first optical surface.

7. The optical system according to claim 6, characterized in that The surface shape of the second optical surface is a parabola.

8. The optical system according to any one of claims 1 to 7, characterized in that: The optical system also includes a secondary reflector, which is arranged on one side of the light-emitting surface of the lens. The light that enters the lens body again after being reflected by the second optical surface is reflected on the surface of the secondary reflector after being emitted from the light-emitting surface.

9. A lamp, characterized in that: The lamp comprises a light source and an optical system as described in any one of claims 1 to 8, and the light source is arranged in the mounting groove of the lens.

10. The lamp according to claim 9, characterized in that: The lamp is a spotlight, the light near the center portion emitted by the light source passes through the lens body twice to form a rainbow aperture, and another portion of the light emitted by the light source is emitted from the light emitting surface to form a small-angle light beam.

Images