Optical assembly, optical system, optical system assembly method, and luminaire

Abstract

The application provides an optical assembly for light control processing of light emitted by a light source, comprising a first optical part and a second optical part arranged inside the first optical part; the first optical part is provided with a first reflection part and a light transmission part, the first reflection part is close to the light source, and the first reflection part and the light transmission part form a light control part of the first optical part; the second optical part is provided with a second reflection part, the second reflection part is arranged opposite to the light control part, and the light emitted by the light source is reflected by the first reflection part and the second reflection part in sequence and then emitted from the light transmission part with an exit angle of 0-0.6° from bottom to top. The optical assembly performs reflection and transmission light control processing on the light emitted by the light source through the first optical part and the second optical part, optimizes the light path of the reflection and transmission, reduces the exit angle and the secondary light spot, and improves the light emission efficiency. The application also provides an optical system comprising the optical assembly, an assembly method of the optical system and a lamp.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of small-angle illumination, and in particular to an optical assembly, an optical system, an optical system assembly method and a lamp. BACKGROUND

[0002] In order to achieve highlight illumination, a spotlight or a down lamp needs to have small-angle light distribution, so as to obtain a small illumination range and high central light intensity.

[0003] In order to make a small illumination angle, the existing lamp often adopts a TIR lens and a light cup. Figure 1 A light path diagram of the TIR lens processing light is shown in FIG. 1. Figure 1 In the TIR lens, the light is collected through the light inlet and cannot be emitted as a collimated light, the light diffused on both sides is mixed with the light of the lens reflection surface, thereby forming a secondary light spot, and the angle cannot be made small. In order to enable the optical assembly containing the TIR lens to achieve a small angle and no stray light effect, a method of shielding the middle light emitting part in the lens system is often used, but this method reduces the light utilization rate and leads to a low light efficiency of the whole lamp.

[0004] There are also corresponding light control schemes for structural improvement of the small-angle lens. For example, the prior art discloses an extremely small-angle lens, which comprises a lens body, the lens body comprises a light inlet end and a light outlet end, a blind hole is arranged in the middle of the light inlet end, a conical frustum-shaped groove with a large outer diameter and a small inner diameter is arranged in the middle of the light outlet end, a circular table protrusion is arranged at the bottom end of the conical frustum-shaped groove, and a conical groove is arranged at the outer end of the circular table protrusion. The extremely small-angle lens mainly realizes small-angle light distribution by changing the height or aperture size of the lens, and the size of the height and aperture needs to be accurately controlled.

[0005] Figure 2 A light path diagram of the light cup processing light is shown in FIG. 2. Figure 2 The light cup cannot control the middle emitted light, and most of the direct light will be scattered after being emitted, which will also produce a secondary light spot, and there will be a heavy yellow spot and stray light in the secondary light spot, so that the small-angle illumination effect is limited in application.

[0006] Therefore, it is necessary to improve the optical assembly and even the light control system of the existing small-angle lamp, so as to meet the requirements of small-angle illumination and control of the secondary light spot and stray light. SUMMARY

[0007] In order to solve the above problems existing in the prior art, the optical assembly is provided for controlling light emitted by the light source, which combines secondary reflection and transmission and optimizes the optical path of reflection and transmission, so as to reduce the light emitting angle and the secondary light spot, thereby improving the light emitting efficiency.

[0008] In order to achieve the above object, the present application provides the following technical solutions:

[0009] The optical assembly for controlling light emitted by the light source comprises a first optical member and a second optical member arranged inside the first optical member.

[0010] The first optical member is provided with a first reflection part and a light transmission part, the first reflection part is close to the light source, and the first reflection part and the light transmission part form a light control part of the first optical member.

[0011] The second optical member is provided with a second reflection part, the second reflection part is arranged opposite to the light control part, and the light emitted by the light source is reflected by the first reflection part and the second reflection part in sequence and then emitted from the light transmission part with an emission angle of 0-0.6° from bottom to top.

[0012] In the light source assembly, the second reflection part of the second optical member and the first reflection part of the first optical member jointly reflect the light emitted by the light source, so that the light is finally emitted from the light transmission part of the first optical member with a collimation angle of 0-0.6° from bottom to top.

[0013] Further, the light control part is formed by extending the first optical member from outside to inside, the light control part and the second reflection part jointly form a light control area, and the light control area is located above the light source.

[0014] In the light source assembly, the light control area formed by the first optical member and the second optical member jointly controls the light emitted by the light source: after reflection, secondary emission and transmission, the light is finally emitted with collimation, which reduces the formation of secondary light spots and also meets the requirement of small-angle illumination.

[0015] Further, in the cross section of the optical assembly, the first reflection part is a partial curve of an ellipse and satisfies the following equation:

[0016] When the focus is on the x-axis, the standard equation of the ellipse is x 2 / a 2 +y 2 / b 2 =1, (a>b>0);

[0017] When the focus is on the y-axis, the standard equation of the ellipse is: y 2 / a 2 + x 2 / b 2 =1, (a>b>0).

[0018] Further, the first reflection part is a partial curve of the following elliptic equation: x 2 / a 2 +y 2 / b 2 =1, wherein a=18mm, b=5mm.

[0019] Further, on the cross section of the optical assembly, the second reflection part is a partial curve of a parabola and satisfies the following equation: x 2 =2py (p>0), wherein p=14mm.

[0020] Further, the first optical part further comprises a support part located at the outer periphery, and a limiting part is arranged between the light control part and the support part.

[0021] The second optical part has a structure of being narrow at the bottom and wide at the top, and the bottom end of the second optical part is closely connected to the outer periphery of the light source part, and the top end is closely connected to the limiting part.

[0022] Further, the first reflection part and the second reflection part are both provided with a reflective film; and a groove is arranged on the inner side wall of the light control part towards the light source part, and the groove separates the first reflection part and the light-transmitting part.

[0023] When the first optical part is formed, the first reflection part and the light-transmitting part can be processed respectively, for example, only the first reflection part is electroplated to form a layer of reflective film, and the light-transmitting part is not processed.

[0024] The application further provides an optical system, which comprises a light source assembly and the optical assembly described above, and the light source assembly comprises a substrate, a light source support and a light source part, the light source part and the light source support are arranged on the substrate, and the light source support is fixedly installed on the outer periphery of the light source part.

[0025] Further, the light source support is provided with a clamping groove, and the bottom end of the second optical part is abuttingly installed in the clamping groove.

[0026] Further, the optical assembly further comprises a third optical part, which is arranged above the first optical part and located at the outer periphery of the light control part.

[0027] The application further provides an assembling method of an optical system, which assembles the optical system described above according to the following steps:

[0028] S1. The light source part is tightly installed at the center of the substrate, and the light source support is fixedly installed at the outer periphery of the light source part for limiting the position of the light source part;

[0029] S2. The bottom end of the second optical part is abuttingly installed in the clamping groove of the light source support;

[0030] S3. The first optical part is installed outside the second optical part, and the top end of the second optical part is tightly connected to the limiting part of the first optical part;

[0031] S4. The first reflecting part of the first optical part is a partial curve of the following elliptic equation: x 2 / a 2 +y 2 / b 2 =1, wherein a=18mm and b=5mm;

[0032] The second reflecting part of the second optical part is a partial curve of the following parabolic equation: x 2 =2py (p>0), wherein p=14mm.

[0033] The lamp provided by the application comprises a heat dissipation part, a shell and the optical system.

[0034] Based on the above technical scheme, the application achieves the following technical effects:

[0035] (1) The optical assembly provided by the application uses the first optical part and the second optical part to jointly process the light emitted by the light source part, the first reflecting part of the first optical part combines the second reflecting part of the second optical part for secondary reflection, and then the light is emitted from the light-transmitting part at an emission angle of 0-0.6°, thereby reducing the light emission angle and the secondary light spot and improving the light emission efficiency.

[0036] (2) The optical system provided by the application is assembled according to the assembly method, the light emitted from the light source part fixed on the substrate enters the light control area jointly formed by the first optical part and the second optical part, is firstly reflected by the first reflecting part, then enters the second reflecting part, and finally enters the light-transmitting part for emission. After the above light control processing, the secondary light spot is reduced, and the small-angle illumination requirement is met.

[0037] (3) The optical system used in the lamp provided by the application makes full use of all the light emitted by the light source part, thereby improving the light efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 Optical path diagram of the prior art TIR lens processing light rays.

[0039] Figure 2 Optical path diagram of the prior art reflector cup processing light rays.

[0040] Figure 3 Exploded view of the optical assembly of the present application.

[0041] Figure 4 Structure diagram of the first optical component of the present application.

[0042] Figure 5 Exploded view of the optical system of the present application.

[0043] Figure 6 Half sectional view of the optical system of the present application.

[0044] Figure 7 Elliptical diagram of the first reflecting part of the present application.

[0045] Figure 8 Parabolic diagram of the second reflecting part of the present application.

[0046] Figure 9 Optical path diagram of the optical system of the present application.

[0047] Figure 10 Comparison diagram of the spot projection of the prior art TIR lens scheme, reflector cup scheme, and the optical system of the present application.

[0048] Figure 11 Cross-sectional view of the optical system of the present application with a third optical component added.

[0049] Figure 12 Flowchart of the optical system assembly method of the present application.

[0050] Figure 13 Cross-sectional view of the lamp of the present application.

[0051] Reference signs

[0052] 1 optical assembly;

[0053] 11 first optical component, 12 second optical component, 13 light control area;

[0054] 111 first reflecting part, 112 light transmitting part, 113 light control part, 114 supporting part, 115 limiting part

[0055] 116 outer edge portion, 1161 first through hole, 1130 light control inner side wall, 1131 groove;

[0056] 121 second reflection portion, 122 bottom end, 123 top end;

[0057] 100 optical system;

[0058] 2 light source assembly;

[0059] 21 light source piece, 22 light source support, 23 base plate;

[0060] 221 through hole, 222 clamping groove, 231 carrying surface, 232 second through hole;

[0061] 3 third optical piece, 4 fastener;

[0062] 200 heat dissipation piece, 300 shell. DETAILED DESCRIPTION

[0063] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0064] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element.

[0065] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used. It is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0066] Unless otherwise defined, 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. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0067] Embodiment 1

[0068] Figure 3 is an exploded view of the optical assembly of the present embodiment, Figure 4 is a schematic view of the first optical member of the present embodiment, in combination with Figure 3 and Figure 4 An optical assembly 1 for controlling light emitted from a light source member to obtain a small-angle illumination effect. The optical assembly 1 comprises a first optical member 11 and a second optical member 12, the second optical member 12 being disposed inside the first optical member 11.

[0069] The first optical member 11 has a cap-like or cylinder-like structure. The first optical member 11 comprises a first reflecting portion 111 and a light-transmitting portion 112, and the first reflecting portion 111 and the light-transmitting portion 112 form a light-controlling portion 113 of the first optical member 11.

[0070] The second optical member 12 has a bowl-like structure with a narrow bottom and a wide top, and the opening size of the top end 123 is larger than that of the bottom end 122. The inner side wall of the second optical member 12 between the top end 123 and the bottom end 122 is the second reflecting portion 121 of the second optical member 12. The second reflecting portion 121 is disposed opposite to the light-controlling portion 113 of the first optical member 11.

[0071] Figure 5 is an exploded view of the optical system comprising the optical assembly of the present embodiment, Figure 6 is a semi-sectional view of the optical system comprising the optical assembly of the present embodiment, in combination with Figure 3 and Figure 4 on the basis of Figure 5 and Figure 6 The light-controlling portion 113 is formed by the first optical member 11 extending from outside to inside, and the light-controlling inner side wall 1130 of the light-controlling portion 113 faces the light source member 21. More specifically, in the light-controlling portion 113, the first reflecting portion 111 is closer to the light source member 21, and the light-transmitting portion 112 is farther away from the light source member 21 than the first reflecting portion 111. It can be understood that the first reflecting portion 111 is used for primary reflection of light emitted from the light source member 21, the second reflecting portion 121 is used for secondary reflection of the light, and finally the light is collimated and emitted from the light-transmitting portion 112 at an exit angle of 0-0.6° from bottom to top.

[0072] It should be noted that the light-controlling part 113 of the first optical element 11 and the second reflective part 121 of the second optical element 12 together form a light-controlling area 13, which is located above the light source element 21 and is used to reflect and transmit the light emitted by the light source element 21.

[0073] Figure 7 This is a schematic diagram of the ellipse where the first reflective part of this embodiment is located, as shown below. Figure 7 As shown, the first reflective part is a partial curve of an ellipse, and this ellipse conforms to the following equation:

[0074] When the foci are on the x-axis, the standard equation of the ellipse is: x 2 / a 2 +y 2 / b 2 =1, (a>b>0);

[0075] When the foci are on the y-axis, the standard equation of the ellipse is: y 2 / a 2 + x 2 / b 2 =1, (a>b>0);

[0076] Among them, a 2 -c 2 =b 2 Therefore, we know that PF1 + PF2 > F1F2 (P is a point on the ellipse, and F is the focus).

[0077] In this embodiment, a = 18mm, b = 5mm, that is, the point of the first reflective part can be determined according to the following relationship x 2 / 18 2 +y 2 / 5 2 =1 for design.

[0078] Figure 8 This is a schematic diagram of the parabola containing the second reflector in this embodiment, as shown below. Figure 8 As shown, the cross-section of the second reflector can be considered as part of a parabola, and the light source can be considered as a point light source. The light source is placed at the focus of the ellipse, so that all the light rays are reflected from the first reflector to the second reflector.

[0079] The second reflective part can be considered as being composed of multiple elliptical segments. The first reflective part is located at the foci of these multiple elliptical segments of the second reflective part. Each segment of the second reflective part follows the equation of a parabola:

[0080] x 2 The coordinates of a point on =2py (p>0) can be set as (x0, y ... (), to simplify calculations.

[0081] In this embodiment, p = 14mm, i.e. the point of the second reflecting part can be designed according to the relationship x 2 = 28y.

[0082] Further referring to Figure 3 and Figure 6 , the first optical part 11 further comprises a supporting part 114 at the outer periphery, and the light control part 113 is formed by extending the upper end of the supporting part 114 inwardly and downwardly, thereby having a conical structure. In addition, a limiting part 115 is arranged between the supporting part 114 and the light control part 113, and the limiting part 115 is annular structure, which is used to connect with the second optical part 12.

[0083] It should be noted that the first reflecting part 111 and the second reflecting part 121 of this embodiment are plated with a layer of reflecting film on the surface, thereby reflecting the light. The outer side wall of the light transmitting part 112 is the light emitting surface, which can be made transparent or have a microstructure in some embodiments, and a light homogenizing plate (film) can also be added to control the spot size in other embodiments, thereby improving the illumination quality. In addition, an annular groove 1131 is arranged in the inner side wall of the light control part 113 of the first optical part 11 towards the light source part 21, and the groove 1131 separates the first reflecting part 111 and the light transmitting part 112.

[0084] The optical assembly of this embodiment uses the first optical part and the second optical part to process the light emitted by the light source part around the light control area, the first reflecting part of the first optical part combines the second reflecting part of the second optical part for secondary reflection, and then collimates and emits from the light transmitting part, thereby reducing the light emitting angle and reducing the secondary spot through optimizing the optical path of reflection and transmission, thereby improving the light emitting efficiency.

[0085] Embodiment 2

[0086] Figure 5 Fig. 5 is an exploded view of the optical system of this embodiment, Figure 6 Fig. 6 is a semi-sectional view of the optical system of this embodiment, in combination with Fig. 5 Figure 8 A kind of optical system 100 for small angle illumination, including light source assembly 2, and the optical assembly 1 of embodiment 1, optical assembly 1 is installed on light source assembly 2, for processing the light emitted by light source assembly 2, so as to meet the illumination requirement.

[0087] Wherein, light source assembly 2 includes light source part 21, light source support 22 and substrate 23, substrate 23 is the aluminum substrate for pasting light source part 21, and substrate 23 has a flat object surface 231.Light source part 21 and light source support 22 are fixedly installed on substrate 23, specifically, are packaged on object surface 231.Flexible PCB board or circuit channel (not marked in the figure) or other second light source part can also be installed on object surface 231.

[0088] The light source piece 21 of the embodiment is a COB light source, which directly pastes LED chips on a high-reflectivity substrate 23, adopts a COB packaging technology, and is bonded with a circuit board by a bonding wire to form a high-luminous-efficiency integrated surface light source, and is covered and packaged by resin. The light source piece 21 of the embodiment is also closely installed at the center of the substrate 23. Since the substrate 23 and the light source piece 21 are both circular, the center of the light source piece 21 is the same as the center of the substrate 23. In some embodiments, the substrate can also be cut into a square or a ring according to the shape of the lamp.

[0089] The light source support 22 is fixedly installed at the outer periphery of the light source piece 21 and is used to limit the position of the light source piece 21. Specifically, the light source support 22 has a through hole 221, which is equal to or slightly larger than the light source piece 21, so that the light source piece 21 is fixed in position when installed therein.

[0090] The light emitted by the light source piece 21 will be processed by the optical assembly 1 before being emitted. In the optical assembly 1, the light control part 113 of the first optical piece 11 and the second reflecting part 121 of the second optical piece 12 jointly surround the light control area 13, which is located above the light source piece 21 and is used to reflect and transmit the light emitted by the light source piece 21.

[0091] It should be noted that the light source support 22 is provided with a clamping groove 222, and the bottom end 122 of the second optical piece 12 is abutted and installed in the clamping groove 222. In order to increase the connection stability, the contact surface between the bottom end 122 of the second optical piece 12 and the clamping groove 222 can be packaged with glue, that is, the abutment is glued.

[0092] In the first optical piece 11, the support part 114 extends outward at the bottom end to form an outer edge part 116, and the outer edge part 116 is provided with a first through hole 1161. Correspondingly, the substrate 23 is also provided with a second through hole 232. In the process of installing the first optical piece 11 to the substrate 23, a fastener 4 such as a screw can be used to pass through the first through hole 1161 and the second through hole 232 to fix the first optical piece 11 and the substrate 23 together.

[0093] The top end 123 of the second optical piece 12 is closely attached to the limiting part 115 of the first optical piece 11. In some embodiments, the contact surface between the two can also be packaged with glue to avoid the existence of a gap between the second optical piece 12 and the first optical piece 11, which may cause light leakage.

[0094] Figure 9 The optical path diagram of the optical system of the present application is as follows, Figure 9As shown, the light rays are emitted from the light source 21 fixed on the substrate 23, enter the light control area 13 formed by the light control part 113 of the first optical part 11 and the second reflection part 121 of the second optical part 12, and then are reflected by the first reflection part 111, enter the second reflection part 121, and finally enter the light transmission part 112, and are emitted from the bottom to the top with an emission angle of 0-0.6°. After the above light control processing, the optical system 100 reduces the formation of the secondary light spot and meets the small-angle illumination requirement.

[0095] Figure 10 For comparison, a light spot projection diagram of the optical system of the present embodiment is shown in FIG. 10C, a light spot projection diagram of the existing TIR lens scheme is shown in FIG. 10A, and a light spot projection diagram of the existing reflector cup scheme is shown in FIG. 10B. Figure 10 As shown, 10A is a light spot projection diagram of the existing TIR lens scheme, the light spot projection area is large, but the secondary light spot area is also large, and the illumination angle is large; 10B is a light spot projection diagram of the existing reflector cup scheme, the main light spot and the secondary light spot are obviously layered; and 10C is a light spot projection diagram of the optical system of the present embodiment, the light spot projection area is small, the secondary light spot is not obvious, the beam angle is small, and the light rays are concentrated.

[0096] Embodiment 3

[0097] Figure 11 For comparison, a light spot projection diagram of the optical system of the present embodiment is shown in FIG. 10C, a light spot projection diagram of the existing TIR lens scheme is shown in FIG. 10A, and a light spot projection diagram of the existing reflector cup scheme is shown in FIG. 10B. Figure 11 As shown, the optical system 100 of the present embodiment adds a third optical part 3 to the optical system of embodiment 2, the third optical part 3 can be a reflector cup, and the inner side wall is provided with a grid-shaped reflective film structure. The third optical part 3 is arranged above the first optical part 11 and located at the outer periphery of the light control part 113.

[0098] Embodiment 4

[0099] Figure 12 For comparison, a light spot projection diagram of the optical system of the present embodiment is shown in FIG. 10C, a light spot projection diagram of the existing TIR lens scheme is shown in FIG. 10A, and a light spot projection diagram of the existing reflector cup scheme is shown in FIG. 10B. Figure 12 As shown, an optical assembly is assembled according to the following steps:

[0100] S1. The light source is tightly installed at the center of the substrate, and the light source support is fixedly installed at the outer periphery of the light source, for limiting the position of the light source;

[0101] S2. The bottom end of the second optical part is abuttingly installed in the clamping groove of the light source support;

[0102] S3. The first optical part is installed outside the second optical part, and the top end of the second optical part is tightly connected to the limiting part of the first optical part;

[0103] S4. The first reflection part of the first optical part is a partial curve of the following elliptic equation: x 2 / a2 +y 2 / b 2 =1, where a=18mm, b=5mm;

[0104] The second reflective portion of the second optical element is a partial curve of the following parabolic equation: x 2 =2py(p>0), where p=14mm.

[0105] After being assembled according to this assembly method, light emitted from the light source fixed on the substrate enters the light control area formed by the first optical component and the second optical component. Then, it undergoes initial reflection by the first reflector, enters the second reflector, and finally exits through the light-transmitting part.

[0106] Example 5

[0107] Figure 13 This is a cross-sectional view of the lamp in this embodiment, as shown below. Figure 13 As shown, a lamp fixture includes a heat sink 200, a housing 300, and an optical system 100 according to Embodiment 2 or Embodiment 3. The heat sink 200 is screwed to the housing 300. The optical system 100 is installed inside the housing 300 and connected to the heat sink 200. This lamp fixture employs an optical system that simultaneously satisfies small-angle emission and reduces secondary light spots. All light emitted from the light source is processed by the first and second optical elements and finally collimated for emission, thus improving lighting efficiency.

[0108] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. An optical assembly for light control of light rays emitted by a light source member, characterized in that, The optical assembly comprises a first optical member and a second optical member arranged inside the first optical member; The first optical member is provided with a first reflecting part and a light-transmitting part, the first reflecting part is close to the light source member, and the first reflecting part and the light-transmitting part form a light control part of the first optical member; The second optical member is provided with a second reflecting part, the second reflecting part is arranged opposite to the light control part, and light of the light source member is reflected by the first reflecting part and the second reflecting part in sequence and then exits from the light-transmitting part with an exit angle of 0-0.6° from bottom to top; On a cross section of the optical assembly, the first reflecting part is a partial curve of an ellipse and meets the following equation: When the focus is on the x-axis, the standard equation of an ellipse: x 2 / a 2 +y 2 / b 2 =1, (a>b>0); When the focus is on the y-axis, the standard equation of the ellipse: y 2 / a 2 + x 2 / b 2 =1, (a>b>0); On a cross-section of the optical assembly, the second reflecting portion is a partial curve of a parabola and complies with the following equation: x 2 = 2py (p > 0), wherein p = 14 mm; The light control part is formed by extending the first optical member from outside to inside, the light control part and the second reflecting part jointly form a light control area around the light control area, and the light control area is located above the light source member; The first optical member further comprises a support part at the outer periphery, a limiting part is arranged between the support part and the light control part, the second optical member has a structure of being narrow at the bottom and wide at the top, the bottom end of the second optical member is closely connected to the outer periphery of the light source member, and the top end is closely connected to the limiting part; The first reflecting part and the second reflecting part are both provided with a reflecting film, and a groove is arranged on the inner side wall of the light control part towards the light source member, the groove separates the first reflecting part and the light-transmitting part.

2. The optical assembly of claim 1, wherein, The first reflecting portion is a partial curve of the following elliptic equation: x 2 / a 2 +y 2 / b 2 =1, where a=18mm, b=5mm.

3. Optical system, characterized in that The optical assembly comprises a light source assembly and the optical assembly of any one of claims 1 or 2, the light source assembly comprises a substrate, a light source support and a light source member, the light source member and the light source support are arranged on the substrate, and the light source support is fixedly installed on the outer periphery of the light source member.

4. The optical system of claim 3, wherein The light source support is provided with a clamping groove, and the bottom end of the second optical member is abuttingly installed in the clamping groove.

5. The optical system of claim 4, wherein, The optical assembly further comprises a third optical member, the third optical member is arranged above the first optical member and at the outer periphery of the light control part.

6. A method of assembling an optical system, characterized by, The optical system of claim 4 is assembled by the following steps: S1. The light source member is tightly installed at the center of the substrate, and the light source support is fixedly installed on the outer periphery of the light source member to limit the position of the light source member; S2. The bottom end of the second optical member is abuttingly installed in the clamping groove of the light source support; S3. The first optical member is installed outside the second optical member, and the top end of the second optical member is closely connected to the limiting part of the first optical member; S4. The first reflecting part of the first optical member is a partial curve of the following elliptic equation: x 2 / a 2 +y 2 / b 2 =1, where a=18mm, b=5mm; The second reflecting part of the second optical member is a partial curve of the following parabolic equation: x 2 = 2py (p > 0), where p = 14 mm.

7. A luminaire characterised in that, The optical system comprises a heat dissipation member, a housing and the optical system of claim 3.

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