CN116266003A

CN116266003A - Optical element, manufacturing method thereof and projection optical device

Info

Publication number: CN116266003A
Application number: CN202111551049.2A
Authority: CN
Inventors: 裘文伟; 杨佳; 刘博�; 张恩鑫; 郎海涛
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2023-06-20

Abstract

The application provides an optical element, a manufacturing method thereof and projection optical equipment. The optical element includes: a light input part for receiving the light rays which are emitted by the projection optical equipment and do not participate in imaging; a light output part, which is arranged on the projection optical device and is used for outputting the received light rays to decorate the projection optical device; and a light transmission part transmitting the light from the light input part to the light output part. The optical element provided by the application provides a passive optical element by utilizing the ineffective light of the projection optical device, reduces stray light in the optical lens of the projection optical device to enhance the functionality, and reduces components such as a light source, a power supply, a connecting wire and the like required by the optical element, thereby providing attractive decoration by utilizing the reduced cost.

Description

Optical element, manufacturing method thereof and projection optical device

Technical Field

The present application relates to the field of optical device design and manufacturing, and more particularly, to an optical element, a method of manufacturing the same, and a projection optical apparatus.

Background

With the development of technology, while the main functions of optical devices such as lamps are fully realized, the requirements of the optical devices in terms of decoration are increasing.

In this application, a vehicle lamp is described as an example for clarity. It should be understood that the optical element in the present application can be applied to an optical device in any field.

In modern vehicle lamp applications, consumer demand for vehicle lamp aesthetics is also increasing. Thus, manufacturers often place optical elements around the luminaire when designing vehicle luminaires. In order to provide the conventional optical element, besides the light source of the vehicle self-lighting device, a set of components such as an illumination light source, a power supply, a connecting wire and the like are required to be additionally arranged, and the manufacturing cost is increased.

In addition, in the application process, light which is generated by the light source of the conventional car lamp and forms a larger angle with the main light path direction of the conventional car lamp is mainly generated by reflection of the inner wall of the lens barrel, so that the light generated by the light source of the conventional car lamp is not completely applied to the effective projection image surface of the car lamp, but a certain amount of parasitic light is often generated outside the effective projection image surface. Most of these stray light is generated by reflection from the inner wall of the lens barrel, and also includes external light that does not enter the optical system, and thus, ineffective light includes internal stray light that enters the optical system or light that does not participate in imaging inside, thereby affecting illumination/projection of the entire system.

There is a need in the art for a passive optical component that is simple in construction to overcome the above technical difficulties, so that consumer demand for lamp decoration is met without increasing cost and/or illumination/projection effects of the lamp.

Disclosure of Invention

The present application provides an optical element and a method of manufacturing the same that can at least partially solve the above-mentioned problems existing in the related art.

In one aspect, the present application provides an optical element that may include: a light input part for receiving the light rays which are emitted by the projection optical equipment and do not participate in imaging; a light output part, which is arranged on the projection optical device and is used for outputting the received light rays to decorate the projection optical device; and a light transmission section that transmits light from the light input section to the light output section.

In one embodiment, the light input receives light from a light source of the projection optical device.

In one embodiment, the projection optical apparatus may include an optical lens for projection imaging and a barrel for setting the optical lens, and the light input part may receive light through a side of the barrel.

In one embodiment, the projection optical device may include a light projecting part, the light output part may be disposed around the light projecting part, and a shape of the light output part matches a shape of the light projecting part.

In one embodiment, the light transmitting portion may be disposed as a totally reflected light ray in a direction close to the optical path of the projection optical device and as a transmitted light ray in a direction away from the optical path of the projection optical device.

In one embodiment, the portion of the light transmitting portion in a direction away from the optical path of the projection optical apparatus and the outer surface of the light output portion may be a roughened surface.

In one embodiment, the light transmitting portion may be disposed as total reflection light in a direction approaching the optical path of the projection optical device and in a direction departing from the optical path of the projection optical device.

In one embodiment, the optical element may further include: a body for forming a contour of the optical element and forming the light input section, the light output section, and the light transmitting section therein, wherein the body is formed as a part of the lens barrel.

In one embodiment, the light input is positioned such that light received from the light source may deviate from a primary optical axis of the projection optical device by a first angle, which is greater than 60 °, to be inactive light to the projection optical device.

In one embodiment, the light input is positioned such that light received from the side of the barrel may deviate from a primary optical axis of the projection optical device by a second angle, such that the second angle is greater than 30 ° for inactive light to the projection optical device.

In one embodiment, the distance of the light input part from the light source of the projection optical apparatus may be less than half the length of the lens barrel of the projection optical apparatus.

In one embodiment, the body is integrally formed with the barrel.

In one embodiment, the optical element may be a light guide device disposed on the barrel of the projection optical apparatus, and the optical element may be on an outer surface of one side of the barrel, surround and be adjacent to an outer surface of the barrel.

In one embodiment, the light guide is integrally formed with the lens barrel.

In one embodiment, the light input part may include a surface that receives the light, the surface being provided as a circular surface, a wedge-shaped surface, or an enhanced reflection film provided on the surface.

In one embodiment, the first lens focal length F of the first lens closest to the light source in the projection optical apparatus and the distance d between the light source and the first lens may satisfy 0.007.ltoreq.d/F.ltoreq.0.5.

Another aspect of the present application provides a method for manufacturing an optical element. The method may include: a light input part is arranged on the projection optical equipment to receive the light rays which are emitted by the projection optical equipment and do not participate in imaging; providing a light output portion on the projection optical device to output the received light to decorate the projection optical device; and providing a light transmitting portion between the light input portion and the light output portion to transmit the light from the light input portion to the light output portion.

In one embodiment, the projection optical device may include a light projection portion, the light output portion may be disposed around the light projection portion, and a shape of the light output portion matches a shape of the light projection portion of the projection optical device.

In one embodiment, the body is integrally formed with the barrel.

In one embodiment, the light guide is integrally formed with the lens barrel. In one embodiment, the light input part may include a surface that receives the light, the surface being provided as a circular surface, a wedge-shaped surface, or an enhanced reflection film provided on the surface.

A further aspect of the present application provides a projection optical device comprising an optical element as claimed in any one of the preceding claims.

An optical element provided according to one embodiment of the present application reduces parasitic light within the optical lens of a projection optical device to enhance functionality by providing passive decoration with inactive light of the projection optical device.

Further, by reducing the components required for the optical element, such as light sources, power supplies, wiring, etc., an aesthetically pleasing decoration is provided with reduced costs.

Further, the optical element is simple in structure, so that the processing technology of the optical element is simple, convenient and feasible.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments, made with reference to the following drawings. Wherein:

FIG. 1 is a schematic illustration of an optical element as is conventional in the art;

fig. 2 shows a schematic structural view of an optical element according to a first embodiment of the present application;

fig. 3A to 3B show schematic views of an optical element according to a first embodiment of the present application;

fig. 4 shows a schematic structural view of an optical element according to a second embodiment of the present application;

fig. 5A to 5B show schematic views of an optical element according to a second embodiment of the present application;

fig. 6 shows a schematic structural view of an optical element according to a third embodiment of the present application;

fig. 7 shows a schematic structural view of an optical element according to a fourth embodiment of the present application;

fig. 8 shows a schematic structural view of an optical element according to a fifth embodiment of the present application;

fig. 9 shows a schematic view of an optical element according to a fifth embodiment of the present application; and

fig. 10 shows a block diagram of a method for manufacturing an optical element according to one embodiment of the present application.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to separate one feature from another feature region, and do not denote any limitation of features, particularly do not denote any order of precedence. Thus, a first portion discussed in this application may also be referred to as a second portion, and vice versa, without departing from the teachings of this application.

In the drawings, the thickness, size, and shape of the components have been slightly adjusted for convenience of description. The figures are merely examples and are not drawn to scale.

It will be further understood that terms such as "comprises," "comprising," "includes," "including," "having," "containing," "includes" and/or "including" are open-ended, rather than closed-ended, terms that specify the presence of the stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including engineering and technical terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. In addition, unless explicitly defined or contradicted by context, the particular steps included in the methods described herein are not necessarily limited to the order described, but may be performed in any order or in parallel. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 shows a schematic view of an optical element as is common in the art.

As shown in fig. 1, the optical element 300 is provided with a light emitting device 310. In this example, the light emitting device 310 may be an active light source such as an LED or the like. For simplicity, the power supply and necessary wiring for the optical element 300 are not shown in this schematic diagram.

Example 1

Fig. 2 shows a schematic structural view of an optical element 100 according to a first embodiment of the present application, and fig. 3A to 3B show schematic views of the optical element 100 according to the first embodiment of the present application.

As shown in fig. 2, the optical element 100 includes a light input section 6, a light output section 7, and a light transmitting section 3. In this embodiment, the optical element 100 is a light guide, and is provided on the barrel of the projection optical apparatus 400. The light guide may be a light pipe and may be made of any suitable material such as metal, plastic, silicone or glass. As an exemplary embodiment, the light guide device 100 may be integrally formed with a lens barrel.

The light input section 6 receives light rays emitted from the projection optical device 400 at a large angle not participating in imaging. The light input section 6 receives light rays emitted from the projection optical device 400 at a large angle not participating in imaging by various means so that as much as possible of the light rays not participating in imaging are guided into the light transmitting section of the optical element to illuminate the decorative lamp. For example, the light may be received by surfaces of various shapes, such as circular surfaces, wedge surfaces. Alternatively, the surface may be provided with an enhanced reflection film.

In this embodiment, the projection optical apparatus 400 includes an optical lens 9 for projection imaging and a lens barrel 2 for fixing the optical lens 9. In various embodiments, the optical system of projection optical device 400 is not limited and may be an optical lens having at least one lens 9.

In the projection optical apparatus 400, in order to facilitate reasonable entry of light emitted from the light source into the optical system, it is necessary to reasonably control the distance d between the light source and the first lens closest to the light source to ensure that the distance is within a certain range.

The above-mentioned reasonable control of the distance d between the light source and the first lens closest to the light source means that the distance may not be too large or too small. Too small a distance d may cause too high energy to enter the optical system, resulting in a high risk of chip damage. Too large a distance d is too small to be imaged by light entering the optical system. In an embodiment, the first lens focal length F of the first lens closest to the light source may be in the range of 30mm-70mm, in particular 55mm. The distance d may be in the range of 0.5mm to 15mm, and may be in particular 8mm.

The first lens focal length F of the first lens closest to the light source and the distance d between said light source and said first lens may satisfy 0.007.ltoreq.d/F.ltoreq.0.5, preferably 0.01.ltoreq.d/F.ltoreq.0.3.

The light input part 6 receives light through the side of the lens barrel 2 of the projection optical device 400, particularly, the inner side wall of the lens barrel 2 is partially hollowed out, and large-angle light which passes through the side wall of the lens and does not participate in effective imaging is led out. In this embodiment, a light transmitting hole is provided in the inner side wall of the lens barrel 2, so that invalid light 5 of a specific angle is extracted for lighting the light output section 7.

The light received by the light input 6 is offset from the main optical axis of the projection optical device 400 by a second angle, which is greater than 30 ° for the projection optical device 400, and in this embodiment, is equal to 45 °, so that the internal parasitic light generated by the optical lenses of the projection optical device 400 is significantly reduced.

In addition, the distance H of the light input section 6 from the light source 1 of the projection optical apparatus 400 is less than half the length L of the lens barrel 2 of the projection optical apparatus 400, i.e., H < L/2. The distance H is a distance between the position of the hollow portion of the inner sidewall of the lens barrel 2 and the light source 1 of the projection optical apparatus 400 on the optical axis. By setting the distance H, the light input portion is positioned at the front end of the projection optical apparatus, because the edge light divergence angle of the front end is larger, the probability of occurrence of stray light is higher, so that the stray light which can be irradiated to the front portion of the lens barrel 2 near the side wall of the light source 1 side is utilized, the light output portion 7 is in a lighted state, and thus, the decorative effect is realized without increasing the light source. The light output section 7 is provided to the projection optical apparatus 400 for outputting the received light to decorate the projection optical apparatus 400.

The projection optical device 400 includes a light projecting portion 12, the light output portion 7 is arranged around the light projecting portion 12 of the projection optical device 400, and the shape of the light output portion 7 is determined based on the shape of the light projecting portion 12 of the projection optical device 400. For example, when the shape of the light projecting portion 12 in the cross section of the optical axis is a circle, the shape of the light output portion 7 in the cross section of the optical axis may be a circular shape, an upper and lower trimming circular shape, a strip shape, a semi-cylindrical shape, an elliptical circular shape, or the like. In an embodiment, the optical element 100 may be partially or fully illuminated, as determined by the area of the light guide path that is conducting light.

The light transmitting section 3 transmits light from the light input section 6 to the light output section 7. The light transmitting section 3 reflects light in a direction approaching the optical path of the projection optical device 400 and transmits light in a direction departing from the optical path of the projection optical device 400. In this embodiment, the light transmitting portion 3 achieves total reflection in a direction close to the optical path of the projection optical apparatus 400, so that the light is repeatedly reflected in the light transmitting portion 3, which has achieved the purpose of filling the light transmitting portion 3 with the light.

The portion of the light transmitting portion 3 in the direction away from the optical path of the projection optical apparatus 400 and the inner/outer surface of the light output portion 7 are rough surfaces, and the roughness of the rough surfaces may be set to ra=2.4 um. The rough surface breaks the total reflection condition of the light in the light transmitting portion 3 and the light outputting portion 7, so that the internal light portion diverges outward, and the lighting effect is achieved when viewed from the outside.

In this embodiment, the light guide device transmits the light transmitted from the hollowed-out portion to the trimming positions on two sides of the light projection portion of the projection optical apparatus 400 to form two bright decorative lamps. In another embodiment, the optical element 100 may be an annular decorative lamp, specifically, a circle is hollowed out on the lens barrel, and the light guide device is also configured as a ring shape, so as to light the annular light output part 7.

In this embodiment, after the light emitted from the light source 1 of the projection optical apparatus 400 is transmitted to the lens of the projection optical apparatus 400, a part of the effective light 4 is output to the light projecting section 12 of the projection optical apparatus 400 via the optical system to realize the optical function of the projection optical apparatus, and a part of the ineffective light 5 deviating from the main optical axis by a larger second angle enters the light transmitting section 3 to form total reflection. Since the portion of the light transmitting portion 3 in the direction away from the optical path of the projection optical apparatus 400 and the outer surface of the light output portion 7, the internal light is scattered to the outside, so that the optical element 100 appears to be in a lit state to achieve the decoration purpose.

In the embodiments shown in fig. 3A-3B, after light enters the light guide channel, the light may be totally reflected or transmitted in the light guide channel. The totally reflected light illuminates the light output 7 of the optical element, while the transmitted light may illuminate around the lens, in particular the transmitted light may project any pattern such as the "sun" shown.

In an embodiment, the pattern is realized by changing the surface structure of the light guiding device, e.g. making the surface structure of the light guiding device rough, thereby enabling transmission.

Example 2

Fig. 4 shows a schematic structural view of an optical element 100 according to a second embodiment of the present application, and fig. 5A to 5B show schematic views of the optical element 100 according to the second embodiment of the present application.

As shown in fig. 4, 5A and 5B, the optical element 100 in the second embodiment is similar to the optical element 100 in the first embodiment, and thus, the same and similar features therebetween will not be described herein.

The optical element 100 in the second embodiment is different from the optical element 100 in the first embodiment in that the optical element 100 serving as a light guide device is provided on the outer surface of the lens barrel 2 of the projection optical apparatus 400 in the second embodiment so that the light input portion 6 of the optical element 100 receives light emitted from the light source 1 of the projection optical apparatus 400 at a large angle not participating in imaging, that is, the light input portion 6 of the optical element 100 in the second embodiment receives light emitted from the light source of the projection optical apparatus 400 not entering the lens in the lens barrel 2, but not receiving light through the side of the lens barrel 2 of the projection optical apparatus 400. As an example, the light guide device 100 may be integrally formed with the lens barrel.

As shown in fig. 4, most of the light emitted from the light source 1 of the projection optical apparatus 400 is transmitted to the lens of the projection optical apparatus 400 as effective light.

Of the light rays emitted from the light source 1 of the projection optical apparatus 400, a part of the light rays which deviate from the main optical axis of the projection optical apparatus 400 by a large first angle becomes light rays which are ineffective for the projection optical apparatus 400, and the first angle is greater than 60 °. In this embodiment, the first angle is 75 °. The light input portion 6 of the optical element 100 receives the ineffective light 5, and transmits the ineffective light 5 from the light input portion to the light output portion 7 through the light transmission portion 3, so that the optical element 100 appears to be in a lit state on the outside, thereby achieving the decoration purpose.

In the embodiment, as shown in fig. 5A and 5B, in order to enable the effective light to smoothly illuminate the light projecting section 12 of the projection optical apparatus 400, a coating/blackening process may be performed on the inner surface of the light guide device as the barrel 2 of the projection optical apparatus 400 to provide the film 11 so that the normal projection of the effective light of the projection optical apparatus is not affected.

Example 3

Fig. 6 shows a schematic structural view of an optical element 100 according to a third embodiment of the present application.

As shown in fig. 6, the optical element 100 in the third embodiment is similar to the optical element 100 in the first embodiment, and thus, the same and similar features therebetween will not be described here.

The optical element 100 in the third embodiment is different from the optical element 100 in the first embodiment in that the optical element 100 in the third embodiment is provided as a transparent portion of the lens barrel 2 of the projection optical apparatus 400. As an example, the light guide device 100 may be integrally formed with the lens barrel. Specifically, when the lens barrel is produced, a transparent portion is directly provided inside the lens barrel, and the transparent portion serves as an optical element.

In this embodiment, the optical element further includes a body for forming a contour of the optical element, and forming the light input portion, the light output portion, and the light transmitting portion therein. The body is formed as part of the lens barrel.

As shown in fig. 6, after the light emitted from the light source 1 of the projection optical apparatus 400 is transmitted to the lens of the projection optical apparatus 400, a part of the effective light 44 is output to the light projection section via the optical system, and a part of the ineffective light 5 deviating from the main optical axis by a larger second angle enters the transparent passage of the lens barrel 2 to form total reflection. Since the outer surface of the transparent lens barrel 2 is a rough surface, the internal light is scattered to the outside, so that the transparent lens barrel 2 is in a lighting state, and the purpose of decoration is achieved.

In the embodiment, the lens barrel 2 may be designed to be transparent only without affecting normal projection of the projection optical apparatus 400, so that the internal invalid light can be smoothly guided to the optical element 100.

Example 4

Fig. 7 shows a schematic structural view of an optical element 100 according to a fourth embodiment of the present application.

As shown in fig. 7, the optical element 100 in the fourth embodiment is similar to the optical element 100 in the second embodiment, and thus, the same and similar features therebetween will not be described here.

The optical element 100 in the fourth embodiment is different from the optical element 100 in the second embodiment in that the optical element 100 in the fourth embodiment is provided as the transparent barrel 2 of the projection optical apparatus 400.

As shown in fig. 7, most of the light emitted from the light source 1 of the projection optical apparatus 400 is transmitted to the lens of the projection optical apparatus 400 as effective light. In the embodiment, in order to enable the effective light to smoothly illuminate the light projection section of the projection optical apparatus 400, a coating/blackening process may be performed on the inner surface of the light guide device as the transparent barrel 2 of the projection optical apparatus 400.

Of the light rays emitted from the light source 1 of the projection optical apparatus 400, a part of the light rays which deviate from the main optical axis of the projection optical apparatus 400 by a large first angle becomes light rays which are ineffective for the projection optical apparatus 400, and the first angle is greater than 60 °. The light input portion 6 of the optical element 100 receives the ineffective light 5, and transmits the ineffective light 5 from the light input portion to the light output portion 7 through the light transmission portion 3, so that the optical element 100 appears to be in a lit state on the outside, thereby achieving the decoration purpose.

Example 5

Fig. 8 shows a schematic structural view of an optical element 100 according to a fifth embodiment of the present application, and fig. 9 shows a schematic view of the optical element 100 according to the fifth embodiment of the present application.

As shown in fig. 8 and 9, the optical element 100 in the fifth embodiment is similar to the optical element 100 in the first embodiment, and thus, the same and similar features therebetween will not be described here.

The optical element 100 in the fifth embodiment is different from the optical element 100 in the first embodiment in that the light transmitting section 3 reflects light in both a direction approaching the optical path of the projection optical apparatus 400 and in a direction separating from the optical path of the projection optical apparatus 400. In this embodiment, the light transmitting section 3 achieves total reflection in a direction close to the optical path of the projection optical apparatus 400 and in a direction away from the optical path of the projection optical apparatus 400, so that light is repeatedly reflected in the light transmitting section 3 for the purpose of achieving total transmission of the received light to the light output section 7, so that the light output section 7 is brighter.

As shown in fig. 9, the light transmitting portion 3 of the optical element 100 is provided with a smooth surface in both the direction approaching the optical path of the projection optical device 400 and the direction separating from the optical path of the projection optical device 400, thereby achieving total reflection such that light is repeatedly reflected in the light transmitting portion 3 and is entirely transmitted to the light output portion 7, and the inner and outer surfaces of the light output portion are provided with roughness such that light transmitted thereto is transmitted out of the light output portion 7 for decorative purposes.

Fig. 10 illustrates an exemplary block diagram of a method for fabricating an optical element 100 according to another aspect of the present application.

As illustrated, the method may include the steps of:

step S110: a light input part 6 is arranged on the projection optical device 400 to receive the light rays which are emitted by the projection optical device 400 and do not participate in imaging at a large angle;

step S120: a light output section 7 is provided on the projection optical apparatus 400 to output the received light to decorate the projection optical apparatus 400; and

step S130: the light transmitting portion 3 is provided between the light input portion 6 and the light output portion 7 to transmit light from the light input portion 6 to the light output portion 7.

In an embodiment of the method 100, the light input 6 receives light from a light source of the projection optical device 400. In this embodiment, the light input section 6 of the optical element 100 receives light rays emitted from the light source 1 of the projection optical apparatus 400 at a large angle that does not participate in imaging. In other words, the light input section 6 of the optical element 100 receives stray light outside the optical system of the projection optical apparatus 400. In an embodiment of the method 100, the light input 6 is positioned such that light received from the light source may deviate from the main optical axis of the projection optical device 400 by a first angle, which is larger than 60 °, to the projection optical device 400, to avoid affecting the functionality of the projection optical device 400 and to provide the ornamental of the optical element 100.

In an embodiment of the method 100, the projection optical apparatus 400 may include an optical lens for projection imaging and a lens barrel for setting the optical lens, and the light input part 6 may receive light through a side of the lens barrel. In an embodiment of the method 100, the light input 6 is positioned such that light received from the side of the barrel may deviate from the main optical axis of the projection optical device 400 by a second angle, such that no light is available to the projection optical device 400, the second angle being greater than 30 °, such that stray light in the projection optical device 400 is received more, to enhance the functionality of the projection optical device 400 and the decorative properties of the optical element 100.

In this embodiment, the light input section 6 receives light through the side of the barrel 2 of the projection optical apparatus 400, and particularly, the inner side wall portion of the barrel 2 is hollowed out, and large-angle light which does not participate in effective imaging is extracted through the side wall of the lens. In this embodiment, a light transmitting hole is provided in the inner side wall of the lens barrel 2, so that invalid light 5 of a specific angle is extracted for lighting the light output section 7.

In an embodiment of the method 100, the projection optical device 400 may comprise a light projection, the light output 7 may be arranged around the light projection, and the shape of the light output 7 matches the shape of the light projection of the projection optical device 400. In an embodiment, the optical element 100 may be partially or fully illuminated, as determined by the area of the light guide path that is conducting light.

In an embodiment of the method 100, the light transmitting part 3 may be arranged as totally reflected light in a direction close to the light path of the projection optical device 400 and as transmitted light in a direction away from the light path of the projection optical device 400. To achieve this, the portion of the light transmitting portion 3 in the direction away from the optical path of the projection optical apparatus 400 and the outer surface of the light output portion 7 may be roughened surfaces. The roughness of the roughened surface may be set to ra=2.4 um. The rough surface breaks the total reflection condition of the light in the light transmitting portion 3 and the light outputting portion 7, so that the internal light portion diverges outward, and the lighting effect is achieved when viewed from the outside.

In an embodiment of the method 100, the optical element further comprises: a body for forming the outline of the optical element and forming therein the light input section 6, the light output section 7, and the light transmitting section 3, wherein the body is formed as a part of the lens barrel.

In an embodiment of the method 100, the distance of the light input 6 from the light source of the projection optical device 400 may be less than half the length of the barrel of the projection optical device 400. In this case, receiving the effective light in the projection optical apparatus 400 can be avoided from adversely affecting the functionality of the projection optical apparatus 400.

In an embodiment of the method 100, the body is integrally formed with the barrel. In this case, the optical element and the lens barrel are integrated, thereby further reducing the number of parts, the difficulty of assembly, and the material cost, the assembly cost, and the manufacturing cost.

Another aspect of the present application also provides a projection optical apparatus 400 including the optical element 100 described above. The projection optical device 400 provides passive decoration with inactive light, reducing parasitic light within the optical lens of the projection optical device 400 to enhance functionality.

The foregoing description is only illustrative of the embodiments of the present application and of the principles of the technology applied. It should be understood by those skilled in the art that the scope of protection referred to in this application is not limited to the specific combination of the above technical features, but also encompasses other technical solutions formed by any combination of the above technical features or their equivalents without departing from the technical concept. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.

Claims

1. An optical element, comprising:

a light input part for receiving the light rays which are emitted by the projection optical equipment and do not participate in imaging;

a light output part, which is arranged on the projection optical device and is used for outputting the received light rays to decorate the projection optical device; and

and a light transmission part for transmitting the light from the light input part to the light output part.

2. An optical element according to claim 1, characterized in that,

the light input portion receives light from a light source of the projection optical device.

3. The optical element according to claim 1, wherein the projection optical device includes an optical lens for projection imaging and a lens barrel for setting the optical lens,

the light input part receives light through a side of the lens barrel.

4. The optical element of claim 1, wherein the projection optical device comprises a light projection section, wherein,

the light output section is arranged around the light projecting section, and the shape of the light output section matches the shape of the light projecting section.

5. An optical element as claimed in any one of claims 1 to 4, characterized in that,

the light transmitting portion is configured to totally reflect light in a direction approaching an optical path of the projection optical device and configured to transmit light in a direction away from the optical path of the projection optical device.

6. An optical element as claimed in claim 5, characterized in that,

the portion of the light transmitting portion in a direction away from the optical path of the projection optical apparatus and the outer surface of the light output portion are roughened surfaces.

7. An optical element as claimed in any one of claims 1 to 4, characterized in that,

the light transmitting portion is configured to totally reflect light in a direction approaching an optical path of the projection optical device and in a direction separating from the optical path of the projection optical device.

8. An optical element as recited in claim 3, further comprising:

a body for forming a contour of the optical element and forming the light input section, the light output section, and the light transmitting section therein,

wherein the body is formed as part of the lens barrel.

9. A method for manufacturing an optical element, the method comprising:

a light input part is arranged on the projection optical equipment to receive the light rays which are emitted by the projection optical equipment and do not participate in imaging;

providing a light output portion on the projection optical device to output the received light to decorate the projection optical device; and

a light transmitting portion is provided between the light input portion and the light output portion to transmit the light from the light input portion to the light output portion.

10. A projection optical apparatus comprising the optical element of any one of claims 1 to 8.