Active lotus reflector assembly and use method thereof

Abstract

The invention discloses an active lotus reflector assembly and a use method thereof, and relates to the field of optics, and the assembly comprises a transparent medium body which is provided with an ultimate annular reflecting surface which is an annular curved surface, the profile of the section of the ultimate annular reflecting surface on a plane containing the center line of the ultimate annular reflecting surface is a straight line section or a curved line section with an inclined angle relative to the center line; the annular light source is used for emitting light; the semi-closed space is formed in the transparent medium body and used for containing the annular light source, and the side wall of the semi-closed space is provided with an annular opening allowing light to be emitted out; by arranging the ultimate annular reflecting surface and the annular light source, reflection and focusing of light can be effectively achieved, an annular narrow focus area and an annular focus set group area are formed, the problem that the focus edge of a traditional system is fuzzy is effectively solved, and the selective reflecting film layer only reflecting the target wavelength lambda is plated on the surface of the ultimate annular reflecting surface. Different wave band requirements can be met, stray light interference is avoided, and the light path purity is improved.

Description

Technical Field

[0001] The invention relates to optical technology, and in particular to an active lotus reflector assembly and a use method thereof. Background Art

[0002] In the field of optical precision processing and detection, the annular optical path system has become the core technical solution for scenarios such as medical devices and industrial high-precision material processing due to its unique annular energy distribution characteristics.

[0003] Traditional annular optical path systems suffer from excessive local temperature differences due to blurred focus edges (which may cause irreversible damage). Furthermore, they rely on additional spectral filtering devices, which increases system complexity and energy loss. Furthermore, the long optical path and multiple refractions result in a bloated structure, making it difficult to precisely control the diameter and density of the focus cluster, thus affecting optical path uniformity and actual application effects. Summary of the Invention

[0004] The purpose of the present invention is to provide an active lotus reflector assembly and a method for using the same, so as to solve the problems of conventional annular optical path systems in the prior art, such as uneven temperature distribution, complex system and high energy loss, caused by blurred focus edges, reliance on a mottled spectrum filtering device and a long optical path.

[0005] In order to achieve the above object, the present invention provides an active lotus reflector assembly, comprising:

[0006] A transparent medium body, on which an ultimate annular reflective surface is provided, the ultimate annular reflective surface being an annular curved surface, and the cross-sectional profile of the ultimate annular reflective surface on a plane containing its own center line being a straight line segment or a curved line segment at an inclined angle relative to the center line;

[0007] A ring light source for emitting light;

[0008] A semi-enclosed space is provided on the transparent medium body and is used to accommodate the annular light source. A side wall of the semi-enclosed space is provided with an annular opening for light emission.

[0009] The ultimate annular reflective surface is used to receive and reflect the light emitted from the annular opening and directly irradiated or transmitted through reflection.

[0010] Furthermore, the semi-enclosed space is arranged around the outer periphery of the ultimate annular reflective surface, and the annular opening on the semi-enclosed space faces the ultimate annular reflective surface.

[0011] Furthermore, a semi-enclosed space is arranged on the back side of the ultimate annular reflective surface, and a first annular reflective surface and a second annular reflective surface are provided on the transparent medium body. The light emitted by the annular light source is reflected by the first annular reflective surface and the second annular reflective surface in sequence and then reaches the ultimate annular reflective surface.

[0012] Furthermore, the surface of the ultimate annular reflective surface is coated with a selective reflective film layer that only reflects the wavelength λ.

[0013] Furthermore, the inner wall of the semi-enclosed space is plated with a reflective film layer.

[0014] Another aspect of the present invention provides a method for using an active lotus reflector assembly, which is applicable to any of the above-mentioned active lotus reflector assemblies and comprises the following steps:

[0015] S1. Start the annular light source to emit an annular light with a wavelength of λ, and the light passes through the annular opening in the semi-enclosed space;

[0016] S2, the light is emitted in a direction through the annular opening in the semi-enclosed space;

[0017] S3. When the annular light source is located on the outer ring of the ultimate annular reflective surface, the light emitted directionally through the annular opening is directly emitted toward the ultimate annular reflective surface;

[0018] When the annular light source is located on the back side of the ultimate annular reflective surface, the light emitted directionally through the annular opening is reflected by the first annular reflective surface and the second annular reflective surface in sequence before reaching the ultimate annular reflective surface;

[0019] S4, the coating layer on the surface of the ultimate annular reflector reflects light of wavelength λ;

[0020] S5. The light reflected by the ultimate annular reflective surface is focused in sequence to form an annular narrow focus area and an annular focus cluster area. The light continues to propagate from the annular focus cluster area and is divergently output in an annular path.

[0021] Compared with the existing technology, the active lotus reflector assembly and its use method provided by the present invention can effectively reflect and focus light by providing an ultimate annular reflective surface and an annular light source, forming an annular narrow focal area and an annular focal cluster area, effectively solving the focus edge blur problem of traditional systems. In addition, by coating the surface of the ultimate annular reflective surface with a selective reflective film layer that only reflects the target wavelength λ, it can adapt to different wavelength band requirements, avoid stray light interference, and improve the purity of the optical path.

[0022] By accommodating the annular light source in a semi-enclosed space and combining it with a reflective film layer on the inner wall, light is forced to be emitted in a directionally directed manner from the annular opening, reducing light energy loss. The integrated optical path structure and built-in selective reflective film layer can effectively eliminate the traditional color spectrum filtering device and greatly simplify the system architecture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the principle of an active lotus reflector assembly according to an embodiment of the present invention;

[0025] Figure 2 The embodiment of the present invention provides Figure 1 A is an enlarged schematic diagram;

[0026] Figure 3 A schematic cross-sectional view of an active lotus reflector assembly according to an embodiment of the present invention;

[0027] Figure 4 A schematic front view of the structure of an active lotus reflector assembly according to an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the principle of an active lotus reflector assembly in another form provided by an embodiment of the present invention;

[0029] Figure 6 The embodiment of the present invention provides Figure 5 A magnified schematic diagram of point B in FIG.

[0030] Figure 7 A schematic cross-sectional view of an active lotus reflector assembly in another form provided by an embodiment of the present invention;

[0031] Figure 8 A schematic front view of the structure of an active lotus reflector assembly in another form provided by an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1. Transparent medium; 2. Ring-shaped light source; 3. Ultimate ring-shaped reflective surface; 4. Semi-enclosed space; 5. First ring-shaped reflective surface; 6. Second ring-shaped reflective surface; 7. Ring-shaped narrow focus area; 8. Ring-shaped focus cluster area; 9. Built-in ring-shaped lens; 10. Baffle. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] See also Figures 1 to 8 In one aspect, the present invention provides an active lotus reflector assembly, comprising:

[0036] A transparent medium body 1 is provided with an ultimate annular reflective surface 3, wherein the ultimate annular reflective surface 3 is an annular curved surface, and the cross-sectional profile of the ultimate annular reflective surface 3 on a plane containing its own center line is a straight line segment or a curved line segment with an inclined angle relative to the center line;

[0037] a ring light source 2, for emitting light;

[0038] A semi-enclosed space 4 is provided on the transparent medium body 1 and is used to accommodate the annular light source 2. A side wall of the semi-enclosed space 4 is provided with an annular opening for light emission.

[0039] The ultimate annular reflective surface 3 is used to receive and reflect the light emitted from the annular opening and directly irradiated or transmitted by reflection.

[0040] In precision application scenarios such as medical treatment, traditional annular optical path systems suffer from excessive local temperature differences due to blurred focus edges (which may cause irreversible damage). At the same time, they rely on additional multicolored spectrum filtering devices to increase system complexity and energy loss. In addition, the long optical path and multiple refractions cause a bloated structure, making it difficult to accurately control the diameter and density of the focus cluster, affecting the uniformity of the optical path and the actual application effect.

[0041] The light emitted by the annular light source 2 is emitted from the annular opening of the semi-enclosed space 4. These light rays are directly irradiated or reflected and transmitted through the internal structure of the transparent medium body 1, and then reach the ultimate annular reflecting surface 3. The cross-sectional profile of the ultimate annular reflecting surface 3 (on the plane containing its own center line) is a straight line segment or a curved segment with an inclined angle relative to the center line. The ultimate annular reflecting surface 3 receives the incident light and reflects it out. The reflected light is focused by the ultimate annular reflecting surface 3 to form an annular narrow focal area 7, and then scattered to form an annular focal cluster area 8, and finally outputs a large-angle annular light path, wherein the annular narrow focal area 7 concentrates light energy, and the annular focal cluster area 8 distributes the remaining energy by scattering to form a uniform thermal field, which can effectively solve the problem of local temperature difference caused by blurred focus edge.

[0042] In this embodiment, the geometric configuration of the ultimate annular reflecting surface 3 includes the following clear features: its cross-sectional profile can be a straight line segment (with a certain inclination angle, such as 60±5 degrees) or a curved segment (such as a circular arc, a parabolic arc) on the plane containing the center line, and the overall annular structure includes a standard circular ring rotational symmetry surface or a functionally equivalent approximate circular ring structure (such as an elliptical ring, a multi-segment spliced ​​ring); in actual manufacturing, the theoretical closed surface can be selected to be divided into 6 equal units, and the G1 continuity (tangent continuity) between each unit is strictly maintained and the profile error is ≤±0.01mm, ensuring that the wavefront aberration of the reflected light path is <λ / 10; the reflecting surface can be composed of a single geometric surface (such as a conical surface) or a combined special-shaped surface (for example: an inner 30° inclined surface and an outer 60° parabola spliced ​​together), both of which must meet the light path focusing continuity requirements.

[0043] In this embodiment, the annular light source 2 can adopt a SMD LED light strip or a laser diode array, which is fixed on the inner wall of the semi-enclosed space 4. The SMD LED / laser diode can be fixed using a mature thermal conductive silicone process, and can also be controlled for a specific wavelength. The wavelength control is achieved by pre-selecting a laser tube or a fluorescent converter / filter (standard optical coating process).

[0044] See also Figures 1 to 4 In one embodiment of the present invention, the semi-enclosed space 4 is arranged around the outer periphery of the ultimate annular reflective surface 3, and the annular opening on the semi-enclosed space 4 faces the ultimate annular reflective surface 3;

[0045] Specifically, the annular light source 2 is placed in a semi-enclosed space 4 surrounding the outer periphery of the ultimate annular reflective surface 3, and its annular opening emits light in a direction toward the ultimate annular reflective surface 3. The light is directly irradiated from the opening to the ultimate annular reflective surface 3, and the reflected light is reflected and focused by the ultimate annular reflective surface 3 to form an annular narrow focal area 7, and then scattered to form an annular focal cluster area 8;

[0046] In this embodiment, a built-in annular lens 9 is further provided in the semi-enclosed space 4 and at the annular opening. The built-in annular lens 9 can be a convex lens, a concave lens and a flat lens. The built-in annular lens 9 covers the annular opening and is connected to the inner wall of the semi-enclosed space 4, thereby effectively increasing the strength of the active lotus reflector assembly. Moreover, when the built-in annular lens 9 is a convex lens or a concave lens, it can effectively realize the function of focusing the light emitted by the annular light source 2.

[0047] In this embodiment, in order to facilitate the installation of the annular light source 2, the transparent medium body 1 is separately arranged in the semi-enclosed space 4. The transparent medium body 1 is divided into two parts along the path of the semi-enclosed space 4. The two parts can be connected by a flange and a tapered positioning pin, or by adhesive connection. It should be understood that the above is only an exemplary introduction, and any suitable connection method in the field can be applied to the exemplary embodiments according to the present disclosure, and the present disclosure does not limit this.

[0048] See also Figures 5 to 8 In one embodiment of the present invention, the semi-enclosed space 4 is provided on the back side of the ultimate annular reflective surface 3, and the transparent medium body 1 is provided with a first annular reflective surface 5 and a second annular reflective surface 6. The light emitted by the annular light source 2 is reflected by the first annular reflective surface 5 and the second annular reflective surface 6 in sequence before reaching the ultimate annular reflective surface 3;

[0049] Specifically, the annular light source 2 is placed in a semi-enclosed space 4 on the back side of the ultimate annular reflective surface 3. After the light is emitted from the opening, it is reflected by the first annular reflective surface 5 and the second annular reflective surface 6 in sequence, and finally reaches the ultimate annular reflective surface 3. The reflected light is reflected and focused by the ultimate annular reflective surface 3 to form an annular narrow focal area 7, and then scattered to form an annular focal cluster area 8.

[0050] In this embodiment, the side of the semi-enclosed space 4 away from the ultimate annular reflective surface 3 is open and is provided with a baffle 10. The side of the baffle 10 close to the annular light source 2 is also coated with a reflective film layer. The baffle 10 is fixedly connected to the transparent medium body 1, and can be connected by means of screws or glue. This part is the existing technology. The baffle 10 closes the opening of the semi-enclosed space 4 to facilitate the installation of the annular light source 2. Similarly, it can also effectively enhance the structural strength of the active lotus reflector assembly.

[0051] In one embodiment of the present invention, the surface of the ultimate annular reflective surface 3 is coated with a selective reflective film layer that only reflects wavelength λ;

[0052] Specifically, the surface of the ultimate annular reflective surface 3 is coated with a selective reflective film layer that only reflects the wavelength λ. When the light emitted by the annular light source 2 reaches the reflective surface, the film layer selectively reflects the wavelength λ through the optical interference effect, while other wavelengths of light directly pass through the transparent medium body 1, avoiding stray light interfering with the target light path.

[0053] Here, λ is a specific operating wavelength, which can be freely selected according to actual application requirements (such as 450nm-780nm in the visible light band, 850nm-1550nm in the infrared band, etc.). For example, λ = 650nm is selected in optical sensing (high red light penetration); λ = 405nm is selected in industrial detection (ultraviolet excitation fluorescence). The selective reflective film layer uses precise optical interference design (such as a multi-layer dielectric film stack) to produce constructive interference only for the target λ wavelength to achieve high reflection (reflectivity > 95%), while non-λ wavelengths are directly transmitted due to destructive interference (transmittance > 90%).

[0054] In one embodiment of the present invention, the inner wall of the semi-enclosed space 4 is coated with a reflective film layer;

[0055] Specifically, the light emitted by the annular light source 2 is scattered at multiple angles in the cavity. The coated inner wall uses the principle of mirror reflection (metal film) or thin film interference effect (dielectric film) to reflect the scattered light that deviates from the opening direction back into the cavity, which can force the light to be concentrated and emitted in a direction from the annular opening, and can effectively prevent the light from being transmitted from the area outside the annular opening.

[0056] Another aspect of the present invention provides a method for using an active lotus reflector assembly, which is applicable to the above-mentioned active lotus reflector assembly and comprises the following steps:

[0057] S1, start the annular light source 2, emit an annular light with a wavelength of λ, and the light passes through the annular opening on the semi-enclosed space 4;

[0058] S2, the light is emitted in a direction through the annular opening on the semi-enclosed space 4;

[0059] S3, when the annular light source 2 is located on the outer ring of the ultimate annular reflective surface 3, the light directedly emitted through the annular opening is directly emitted toward the ultimate annular reflective surface 3;

[0060] When the annular light source 2 is located on the back side of the ultimate annular reflective surface 3, the light emitted directionally through the annular opening is reflected by the first annular reflective surface 5 and the second annular reflective surface 6 in sequence before reaching the ultimate annular reflective surface 3;

[0061] S4, the coating layer on the surface of the ultimate annular reflector 3 reflects light of wavelength λ;

[0062] S5. The light reflected by the ultimate annular reflection surface 3 is focused in sequence to form an annular narrow focus area 7 and an annular focus cluster area 8. The light continues to propagate from the annular focus cluster area 8 and is divergently output in an annular path.

[0063] The name "Lotus" in the name of this application comes from the annular optical structure of the component. After the light from the annular light source 2 is reflected by the geometric constraints of the ultimate annular reflecting surface 3, it first forms an annular narrow focal area 7, then forms an annular focal cluster area 8, and finally diverges outward. The divergence of the light path is similar to the hierarchical structure of a blooming lotus, so it is named after the image of "Lotus".

[0064] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An active lotus reflector assembly, characterized in that: include: A transparent medium body (1) is provided with an ultimate annular reflecting surface (3), the ultimate annular reflecting surface (3) being an annular curved surface, and the cross-sectional profile of the ultimate annular reflecting surface (3) on a plane containing its own center line being a straight line segment or a curved line segment at an inclined angle relative to the center line; a ring light source (2), for emitting light; A semi-enclosed space (4) is provided on the transparent medium body (1) and is used to accommodate the annular light source (2). A side wall of the semi-enclosed space (4) is provided with an annular opening for light emission. The ultimate annular reflecting surface (3) is used to receive and reflect the light emitted from the annular opening and directly irradiated or transmitted through reflection.

2. The active lotus reflector assembly according to claim 1, characterized in that: The semi-enclosed space (4) is arranged around the outer periphery of the ultimate annular reflective surface (3), and the annular opening on the semi-enclosed space (4) faces the ultimate annular reflective surface (3).

3. The active lotus reflector assembly according to claim 1, characterized in that: The semi-enclosed space (4) is arranged on the back side of the ultimate annular reflection surface (3); a first annular reflection surface (5) and a second annular reflection surface (6) are provided on the transparent medium body (1); and light emitted by the annular light source (2) is reflected by the first annular reflection surface (5) and the second annular reflection surface (6) in sequence before reaching the ultimate annular reflection surface (3).

4. The active lotus reflector assembly according to claim 1, characterized in that: The surface of the ultimate annular reflective surface (3) is coated with a selective reflective film layer that only reflects the wavelength λ.

5. The active lotus reflector assembly according to claim 1, characterized in that: The inner wall of the semi-enclosed space (4) is plated with a reflective film layer.

6. A method for using an active lotus reflector assembly, characterized in that: The active lotus reflector assembly according to any one of claims 1 to 5 comprises the following steps: S1, starting the annular light source (2), emitting an annular light with a wavelength of λ, and the light passes through the annular opening on the semi-enclosed space (4); S2, the light is emitted in a direction through the annular opening on the semi-enclosed space (4); S3, when the annular light source (2) is located outside the ultimate annular reflecting surface (3), the light directedly emitted through the annular opening is directly emitted toward the ultimate annular reflecting surface (3); When the annular light source (2) is located on the back side of the ultimate annular reflection surface (3), the light directedly emitted through the annular opening is reflected by the first annular reflection surface (5) and the second annular reflection surface (6) in sequence before reaching the ultimate annular reflection surface (3); S4, the coating layer on the surface of the ultimate annular reflective surface (3) reflects light of wavelength λ; S5. The light reflected by the ultimate annular reflection surface (3) is focused in sequence to form an annular narrow focus area (7) and an annular focus cluster area (8). The light continues to propagate from the annular focus cluster area (8) and is diverged and output in an annular path.

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