CN113905472A

CN113905472A - Lens with heating device and lens comprising lens

Info

Publication number: CN113905472A
Application number: CN202010646602.XA
Authority: CN
Inventors: 黄虎钧; 叶雷洪; 毛腾
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2022-01-07
Anticipated expiration: 2040-07-07
Also published as: CN113905472B

Abstract

The application provides a heating device, a lens with the heating device, a lens comprising the lens and a method for preparing the lens comprising the heating device. Wherein, above-mentioned lens includes lens body and heating device. The lens body has opposite first and second faces and an edge connecting the first and second faces; and a heating device is arranged at the edge of the lens body and is used for transferring heat to the lens body after power supply, wherein the heating device is constructed as a ceramic heating ring or a polyimide PI heating film of a heating element arranged inside. The lens with the heating device and the lens comprising the lens can effectively improve the weather resistance of the camera module.

Description

Lens with heating device and lens comprising lens

Technical Field

The present application relates to the technical field of optical devices, and more particularly, to a heating device for a lens, a lens having the heating device, a lens barrel including the lens, and a method of manufacturing the lens barrel including the heating device.

Background

With the development of science and technology, optical devices such as vehicle-mounted lenses, optical lamp covers and the like are increasingly applied to daily life of people. For example, in order to provide comfort and safety for driving a car, the vehicular lens is widely used in the fields of front view, rear view, surround view, interior view, side view, and the like of the car. Meanwhile, with the continuous development of automobile technology, the number and performance of the vehicle-mounted lenses required on the automobile are greatly improved, and the requirement on the weather resistance of the vehicle-mounted lenses is more severe. When a vehicle runs in a continuous rainy, icy or cold-hot alternate environment, the inner and outer surfaces of the near-object side lens of the vehicle-mounted lens are easy to fog or frost, the optical performance of the vehicle-mounted lens is seriously influenced, and the driving safety of people is harmed.

In order to ensure driving safety, the current common means is mainly to adopt a mode of arranging a heating element in a vehicle-mounted lens to heat and evaporate water attached to the surface of the lens or prevent fogging or frosting and the like. For example, the electric heating wire is directly used for heating the lens product, so that the defogging and defrosting functions are achieved.

However, since the electric heating wire needs to be embedded into the lens to be fixed, the original structure of the corresponding lens is changed, which not only increases the difficulty of the overall lens manufacturing process and increases the cost, but also destroys the strength of the corresponding lens, so that the lens is easy to break, the imaging quality is poor and the lens cannot be maintained particularly after the temperature is raised. And the electric heating wire can also have the problems of low heating efficiency, poor heating uniformity, complex installation and the like. And the structure that the heating material is directly embedded into the lens can cause the problems of weaker overall stability of the lens, poorer weather resistance in severe weather and the like. Therefore, the development of a defogging product for the lens, which has the advantages of simple structure, high thermal efficiency, uniform heating, safe use and strong weather resistance, has very important significance.

Disclosure of Invention

The present application provides a lens with a heating device that addresses at least one of the above-mentioned shortcomings in the prior art.

One aspect of the present application provides a lens with a heating device, comprising a lens body having opposing first and second faces and an edge connecting the first and second faces, and the lens further comprising: and a heating device disposed at the edge of the lens body for transferring heat to the lens body after power is supplied, wherein the heating device is configured as a ceramic heating ring or a polyimide PI heating film in which a heating element is disposed.

According to an embodiment of the application, the heating device is arranged on an end face and/or a side face of the lens body at the edge.

According to an embodiment of the application, the heating device has a ring-like structure, the contour of which matches the contour of the edge.

According to an embodiment of the application, the edge is provided with a cutaway groove, in which the heating device is arranged.

According to an embodiment of the application, the heating device further comprises a fixing element for fixing the heating device to the rim.

According to an embodiment of the application, the fixing element is an elastic element, arranged in compression at the edge.

According to an embodiment of the application, the fixing element is a conductive glue or a conductive tape.

According to an embodiment of the application, the fixing element is a thermally conductive glue or tape.

According to an embodiment of the application, there is a machine member between each of the lenses, the ceramic heating ring being formed as the machine member.

According to the embodiment of the application, the heating element is arranged between the double-layer polyimide films, and the heating element is connected with each polyimide film through at least one of heat-conducting glue, heat-conducting adhesive tape, electric-conducting glue and electric-conducting adhesive tape.

According to an embodiment of the present application, the polyimide heating film is a rigid carrier polyimide heating film.

According to an embodiment of the application, the heating element is an electric heating wire.

According to an embodiment of the present application, the heating device further comprises a conductive unit and an energy supply unit, the conductive unit comprises at least two leads for electrically connecting the heating element and the energy supply unit.

According to the embodiment of the application, the electric conduction unit is connected with the heating element through one or more of welding, electric conduction glue, electric conduction adhesive tape, heat conduction glue, heat conduction adhesive tape and pressing connection.

Another aspect of the present application provides a lens barrel including a lens having a heating device, including: a lens barrel having a sidewall; and a plurality of lenses fixed by the side wall of the lens barrel, wherein at least one of the plurality of lenses is a lens having a heating device according to the above.

According to the embodiment of the application, the heating device is arranged between the end surface of the lens body and the sealing piece of the lens.

According to the embodiment of the application, the heating device is arranged between the edge of the lens body and the side wall of the lens.

According to an embodiment of the present application, the heating device is disposed between an edge of the lens body and an edge of an adjacent lens.

According to an embodiment of the application, the heating device is arranged between the edge of the lens body and the sealing member of the lens and the edge of the adjacent lens.

Another aspect of the present application provides a heating device for a lens, the lens comprising a lens body having first and second opposing faces and an edge connecting the first and second faces, wherein the heating device is disposed at the edge of the lens body and comprises: a ceramic heating ring or a polyimide heating film provided with a heating element.

According to an embodiment of the application, the heating device further comprises a fixing element for fixing the heating device to the edge of the lens body. According to an embodiment of the application, the fixing element is a thermally conductive glue or tape.

According to an embodiment of the present application, the fixing member is an elastic member, and the ceramic heating ring or the polyimide heating film is fixed to the rim by an elastic force of the elastic member.

According to the embodiment of the application, the heating element is arranged between the two layers of polyimide films, and the heating element is connected with each polyimide film through at least one of heat conduction glue, heat conduction adhesive tape, electric conduction glue and electric conduction adhesive tape.

According to an embodiment of the present application, the ceramic heating ring or the polyimide heating film has a ring-like structure.

Another aspect of the present application provides a method for manufacturing a lens including a lens having a heating device, the method including: preparing the heating device; arranging the heating device on the lens to form the lens with the heating device; and arranging a plurality of lenses included in the lens barrel.

According to an embodiment of the present application, the lens comprises a lens body having opposing first and second faces and an edge connecting the first and second faces; disposing the heating device to the lens to form the lens with the heating device comprises: and arranging the heating device on the edge of the lens body to form the lens with the heating device.

According to an embodiment of the application, providing the heating device at the edge of the lens body comprises: the heating device is disposed on at least one of an end surface and a side surface of the lens body at the edge.

According to an embodiment of the application, providing the heating device at the edge of the lens body comprises: and arranging the heating device between the end surface of the lens body and the sealing piece of the lens.

According to an embodiment of the application, there is a machine member between each of the lenses, the ceramic heating ring being formed as the machine member. According to an embodiment of the application, providing the heating device at the edge of the lens body comprises: providing a notch groove at the edge; and disposing the heating device in the cutaway groove.

According to an embodiment of the application, providing the heating device at the edge of the lens body comprises: and arranging the heating device between the edge of the lens body and the side wall of the lens.

According to an embodiment of the application, providing the heating device at the edge of the lens body comprises: the heating device is disposed between an edge of the lens body and an edge of an adjacent lens.

According to an embodiment of the application, providing the heating device at the edge of the lens body comprises: the heating device is disposed between an edge of the lens body and a seal of the lens and an edge of an adjacent lens. According to at least one of the aspects of the lens with the heating device provided by the application, at least one of the following advantages can be achieved:

1. the installation is convenient: the ceramic heating ring heating device can set corresponding external dimensions according to the use requirements of the lens; in addition, in the polyimide PI heating film heating device, the polyimide PI film is a semitransparent metal flexible electric heating film, the shape of the polyimide PI film can be changed on the surfaces of some uneven lenses, and good fit is guaranteed;

2. the heat utilization rate is high: the ceramic heating ring heating device can customize the appearance according to the use requirement of the lens, ensure that the heating device can be contacted with the lens to be heated in a large area, and improve the heating performance; in addition, the shape of the flexible polyimide PI heating film heating device can be changed on the surface of an uneven lens, the heating device can be ensured to be in contact with the body of the lens to be heated in a large area, the heat conduction efficiency of the polyimide PI film is high, and the heating performance of the heating device can be greatly improved;

3. intelligent heating: both the internal heating element of the ceramic heating ring heating device and the internal heating element of the polyimide PI heating film heating device have larger TCR (temperature coefficient of resistance), the resistance value of the internal heating element is increased along with the rise of the ambient temperature, and the power of the internal heating element is higher at low temperature under the same voltage input, so that the rapid temperature rise is realized; the resistance value of the heating element is increased and the power is reduced at high temperature, so that the use temperature of the heating device is not overhigh; meanwhile, the TCR (temperature coefficient of resistance) can be reduced to be close to zero by changing the manufacturing material of the heating element, so that the heating element can output constant power;

4. the material is stable: the ceramic heating ring heating device is stable in property, resistant to various external environments and high in reliability due to the fact that ceramic materials are used.

5. The volume is small: the polyimide PI heating film heating device has the advantages of reduced overall film thickness, small occupied space and wide applicability.

Drawings

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

fig. 1A to 1H are sectional views of a lens having a heating device according to an embodiment of the present application;

fig. 2A to 2F are sectional views of a notch groove of a lens having a heating device according to an embodiment of the present application;

FIG. 3 is a schematic view of a position of a fixing element in a lens according to another embodiment of the present application;

FIGS. 4A to 4I are sectional and partially enlarged views of a lens having a polyimide heating film heating apparatus according to another embodiment of the present application;

FIG. 5A is a cross-sectional view of a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 5B is an enlarged partial cross-sectional view taken at location Y in FIG. 5A;

FIGS. 6A-6C are cross-sectional views of a conductive element in a lens having a ceramic heating ring heating apparatus according to an embodiment of the present application;

FIG. 7A is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 7B is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 7B (a) is an enlarged partial cross-sectional view taken along the line Z in FIG. 7B;

FIG. 7C is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 7C (a) is an enlarged partial cross-sectional view taken along line A in FIG. 7C;

FIG. 7C (B) is an enlarged partial cross-sectional view taken along line B in FIG. 7C;

FIG. 8A is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 8B is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 8B (a) is an enlarged partial cross-sectional view taken at location C in FIG. 8B;

FIG. 8C is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application;

FIG. 8C (a) is an enlarged partial cross-sectional view taken at location D in FIG. 8C;

FIG. 8C (b) is an enlarged partial cross-sectional view taken at location E in FIG. 8C;

FIG. 8D is a cross-sectional view of a conductive element in a lens having a polyimide heater film heating apparatus according to another embodiment of the present application; and

fig. 8D (a) is an enlarged partial cross-sectional view of a portion F in fig. 8D.

Detailed Description

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 the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present 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 distinguish one feature from another, and do not represent any limitation on the features. Thus, a first lens discussed below may also be referred to as a second lens without departing from the teachings of the present application. And vice versa.

In the drawings, the thickness, size and shape of the components have been slightly adjusted for convenience of explanation. The figures are purely diagrammatic and not drawn to scale. As used herein, the terms "approximately", "about" and the like are used as table-approximating terms and not as table-degree terms, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.

It will be further understood that terms such as "comprising," "including," "having," "including," and/or "containing," when used in this specification, are open-ended and not closed-ended, and specify the presence of 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 a statement such as "at least one of" appears after a list of listed features, it modifies that entire list of features rather than just individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "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 scientific 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 the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In addition, unless explicitly defined or contradicted by context, the specific steps included in the methods described herein are not necessarily limited to the order described, but can be performed in any order or in parallel. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1A to 1C are sectional views of a lens having a heating device according to an embodiment of the present application. As shown in fig. 1A to 1C, in an embodiment of the present invention, a lens 1000 is disposed in a lens integral structure, and the lens integral structure further includes a lens barrel and other lenses, such as a lens 2000. However, it will be understood by those skilled in the art that the number of lenses with heating means or other related elements included in the lens barrel may be varied to obtain the various results and advantages described in the present specification without departing from the technical solutions claimed in the present application. The lens barrel may include a side wall for fixing the lenses, each lens in the lens barrel is sequentially installed in the lens barrel along the axial direction of the lens, and an edge of each lens is installed on the side wall of the lens barrel, wherein the lenses may be fixed in the lens barrel in various ways, such as by placing the edge of the lens in a groove on the side wall.

In consideration of the fact that the outermost first lens near the object side in the lens is most susceptible to temperature and weather in an external environment such as a rain and snow environment, a low temperature environment, a high temperature environment, or the like, moisture is condensed on the lens surface. Therefore, alternatively, the first lens, such as the lens 1000 in the present embodiment, located on the side of the object in the lens is provided as a lens having a heating device, and the other lens, such as the lens 2000 in the present embodiment, is less affected by the external environment, and therefore, moisture is not easily condensed on the lens surface, and a normal lens or a lens having a heating device may be selected.

As shown in fig. 1A, the lens 1000 is composed of a lens body made of a transparent material, the lens body having a first side 1100 and a second side 1200 opposite to each other, the first side 1100 and the second side 1200 are used for allowing light rays for image formation to pass through. As shown in fig. 1A, the first and

second faces

1100, 1200 may have a generally arcuate profile, with the first face 1100 having a radius greater than a radius of the second face and being spaced apart by a predetermined distance. Herein, a portion connecting the first and

second faces

1100 and 1200 is referred to as an edge 1300, the edge 1300 includes a face 1310a extending along a cut from the first face 1100 as an "upper end face" 1310a, a face 1310b extending along a cut from the second face 1200 as a "lower end face" 1310b (hereinafter, the upper and lower end faces 1310a and 1310b are referred to by the end face 1310), and a face 1320 substantially perpendicular to the upper and lower end faces 1310a and 1310b and extending to be connected to the second face 1200 as a "side face" 1320.

A heating device 1400 may be disposed at the end 1310 at the edge 1300. The heating device 1400 may be a ceramic heating ring heating device 1410 (shown in fig. 1A) or a polyimide PI heating film heating device 1420 (shown in fig. 4A). However, it will be understood by those skilled in the art that the type of heating device in the lens incorporating the heating device may be varied to achieve the various results and advantages described herein without departing from the claimed subject matter, e.g., the heating device 1400 may be one or more of a variety of different devices such as a cast aluminum heater, an electric tracing band, a mica heating plate, etc.

When the lens is affected by external environments, such as a high temperature environment, a low temperature environment, a high temperature environment, a rain and snow environment, moisture can be condensed on the surface of the lens, the lens 1000 with the heating device 1400 is installed, the heating device 1400 can transfer heat to the lens 1000 in a heat conduction or heat radiation mode, and the moisture is evaporated or dissipated, so that the overall weather resistance and reliability of the lens are effectively improved.

In fig. 1A to 1H, the structure and operation of the heating device 1400 are described in detail by taking the ceramic heating ring heating device 1410 as an example. The ceramic heating ring heating device 1410 (hereinafter referred to as the heating device 1410) may be disposed at the end surface 1310 at the edge 1300, i.e., the heating device 1410 may be disposed at the upper end surface 1310a (shown in fig. 1A) or the lower end surface 1310B (shown in fig. 1B) at the edge 1300.

As shown in fig. 1C, a heating device 1410 can also be provided on the side 1320 of the lens 1000 at the edge 1300; alternatively, the heating device 1410 can be disposed at both the end 1310 (at the upper end 1310a or the lower end 1310b) and the side 1320 of the lens 1000 at the edge 1300, such as the heating device 1410 shown in fig. 1D being disposed at both the upper end 1310a and the side 1320, the heating device 1410 being disposed at both the lower end 1310b and the side 1320 as shown in fig. 1E, or the heating device 1410 being disposed at both the upper end 1310a, the lower end 1310b and the side 1320 as shown in fig. 1F.

The heating device 1400 may include a heating element, which may be an electric heating wire, and a temperature-sensitive resistor of the electric heating wire has a relatively large Temperature Coefficient of Resistance (TCR), and after power is supplied, a temperature-sensitive resistance value of the heating element becomes larger along with a rise of an ambient temperature, and under the same voltage input, when the ambient temperature is relatively low, the power of the heating device 1400 is relatively large, so that rapid temperature rise can be achieved; when the ambient temperature is higher, the temperature sensing resistance of the heating element is increased, and the power of the heating device 1400 is reduced, so that the temperature of the heating device 1400 is not too high. Accordingly, after power is applied, the heating device 1400 may heat the lens 1000 such that the temperature of the lens 1000 increases, thereby accelerating evaporation or dispersing moisture such as fog, frost, water droplets, or ice attached to the first side 1100 and the second side 1200 of the lens 1000. Meanwhile, the lens 1000 can be heated by the heating device 1400 after power supply, moisture condensation of the first surface 1100 and the second surface 1200 in the lens 1000 is prevented, the situation of unclear or blind areas and the like of the lens is prevented, and the imaging reliability of the lens 1000 is ensured.

Further, heat generated by the heating device 1400 can be transferred to the lens 1000 by direct or indirect contact. First, the edge 1300 of the lens 1000 tightly fixed to the heating device 1400 receives the heat generated by the heating device 1400 uniformly by means of heat conduction, and then the heat is diffused uniformly from the edge 1300 to the center of the lens 1000 by means of heat conduction and heat radiation, so that the heat diffusion is more uniform, the moisture on the first surface 1100 and the second surface 1200 of the lens 1000 can be effectively eliminated, and the lens 1000 can be prevented from being overheated locally.

The heating device 1400 may be a ring-like structure having a contour that matches the contour of the edge 1300 of the lens 1000 to enable the heating device 1400 to be tightly secured to the edge 1300 of the lens 1000. However, it will be appreciated by those skilled in the art that the shape and configuration of the heating device 1400 may be varied to achieve the various results and advantages described herein without departing from the claimed subject matter.

It is worth mentioning that the cross-sectional shape of the ring-like structure of the heating device 1400 may be circular, rectangular, trapezoidal, stepped, etc., and the cross-sectional shape of the heating device 1400 may be changed according to actual needs without departing from the claimed technical solution to obtain various results and advantages described in the present specification.

A heating element (not shown) in the heating device 1400 is used to generate the heat required by the device 1400 to provide to the lens 1000 to which the heating device 1400 is attached. It can be a metal heating wire, such as a nickel iron wire, an iron chromium aluminum wire, a nickel chromium wire, etc. Alternatively, the heating element may comprise one or more of the above-mentioned electric heating wires. That is, the shape, structure, or material of the heat generating element may be changed to obtain the respective results and advantages described in the present specification.

Further, a mechanism 1500 may be included between each lens, for example, the mechanism 1500 may ensure that a constant safety gap is maintained between the first lens 1000 and the second lens 2000 in the lens. In this application, it may be provided directly as a ceramic heating ring heating device. As shown in fig. 1G, the heating device 1410 can also be disposed adjacent to the machine member 1500, i.e., between the lower end surface 1310b of the lens 1000 and the sealing member 1600 in the lens integral structure; alternatively, as shown in fig. 1C, the heating device 1410 can be disposed between the lens 1000 and the sidewall of the lens; alternatively, as shown in fig. 1H, the heating device 1410 can be directly substituted for the mechanism 1500, and is disposed between the lower end surface 1310b of the lens 1000 and the sealing member 1600 in the lens integrated structure, so as to space the adjacent lenses.

Fig. 2A-2F are cross-sectional views of the relief groove 1330 of the edge 1300 of the lens 1000 with the heating device 1400 according to an embodiment of the present application. As shown in fig. 2A-2F, to more easily and efficiently install the heating device 1400, a notched groove 1330 may be provided on the outside of the edge 1300 of the lens 1000 that receives the heating device 1400. The heating device 1400 is disposed in the notch slot 1330 and fixed to the inner wall of the notch slot 1330, and the notch slot 1330 may be a rectangular notch slot, a triangular notch slot or a circular arc notch slot, which is not limited herein, as long as the contact area between the heating device 1400 and the lens 1000 can be increased, and is within the protection scope of the present invention.

Further, as shown in fig. 2A-2E, a notched groove 1330 may be provided at an end surface 1310 of the lens 1000 at the edge 1300, at a lower end surface 1310B as shown in fig. 2A, at a lower end surface 1310B as shown in fig. 2B, and provided as a rectangular groove having a step shape, at an upper end surface 1310a as shown in fig. 2C; as shown in fig. 2D and 2E, when the heating device 1400 is disposed within the cutaway slot 1330 at the end face 1310, it may extend in the direction of the side face 1320. As shown in fig. 2F, a relief slot 1330 can be provided at a side 1320 of the lens 1000 at the edge 1300. As shown in fig. 2A through 2F, the cutaway slot 1330 is exemplified by a rectangular cutaway slot, however, it will be understood by those skilled in the art that the shape and structure of the cutaway slot 1330 may be changed to achieve the various results and advantages described in the present specification without departing from the claimed subject matter.

Fig. 3 is a schematic diagram illustrating a position of a fixing element 1402 in a lens according to an embodiment of the present application. As shown in fig. 3, in one embodiment of the present application, the heating device 1400 may further include a fixing element 1402. The fixing element 1402 may be any element capable of fixing the heating device 1400 for fixing the heating device 1400 in the lens 1000. By the fixing member 1402, the heating device 1400 can be tightly fixed to the inner wall of the cutaway groove 1330, so as not to be separated from the edge 1300 of the lens 1000, and can always contact and transfer heat to the edge 1300.

In one embodiment of the present application, the fixing element 1402 may be a double-sided adhesive tape with good thermal conductivity, i.e. the fixing element 1402 may be one or more of a thermal adhesive or a thermal tape. When the fixing element 1402 is a thermal adhesive or a thermal adhesive tape with good thermal conductivity, it is adhered between the heating device 1400 and the edge 1300 of the lens 1000, so that the heating device 1400 can be tightly fixed to the edge 1300 of the lens 1000. In another embodiment of the present application, the fixing element 1402 may also be an elastic element which can be placed at the edge 1300 in a compressed state, and when the lens 1000 is fixed to the side wall in the lens, the elastic element can tightly fix the heating device 1400 to the edge 1300 of the lens 1000 by means of the elastic force generated by the side wall supporting force, so that the heating device 1400 can directly contact and transfer heat to the edge 1300 of the lens 1000 by means of heat conduction. However, it will be understood by those skilled in the art that the location of the resilient element can be varied without departing from the claimed subject matter to obtain the results and advantages described herein. For example, the resilient element may be disposed between the lens 1000 and the lens 2000.

In one embodiment of the present application, the fixing element 1402 may also be a double-sided adhesive tape with good electrical conductivity, i.e. the fixing element 1402 may be one or more of a conductive glue or a conductive adhesive tape. When the fixing element 1402 is a conductive glue or a conductive tape, it is adhered between the heating device 1400 and the edge 1300 of the lens 100, so that the heating device 1400 can be tightly fixed to the edge 1300 of the lens 1000.

The fixing element 1402 may also be a locking element of the lens itself, such as an outer pressing ring.

In the lens system, the heating device 1400 may be fixed between the lens and the barrel wall or between adjacent lenses, such as between the lens 1000 and the lens 2000 or between the lens and the spacer ring, by the fixing element 1402.

In the embodiment of the present application, the heating device 1400 may be a ceramic heating ring heating device 1410. The ceramic itself is stable in material and can endure various external environments, and the ceramic heating ring heating device 1410 made of ceramic material has high reliability as a whole. In addition, the ceramic has good thermal conductivity and insulativity, can play perfect guard action to heating element, and because its preparation low cost, outward appearance are workable, consequently ceramic heating ring heating device 1410 can formulate its overall dimension according to the user demand, can formulate its external shape according to the actual shape of lens 1000 again, in order to guarantee that ceramic heating ring heating device 1410 can have a large area of contact with lens 1000 of treating the heating, improve the utilization ratio of heat energy effectively.

In another embodiment of the present application, the heating device 1400 may be a polyimide PI heating film heating device 1420. The polyimide film is a semitransparent metal flexible electric heating film, and the shape of the polyimide film can be changed on uneven surfaces, so that the polyimide film can be well attached to the end surface 1310 or the side surface 1320 of the lens 1000; meanwhile, the contact area between the lens and the lens 1000 to be heated can be ensured to be large enough. Further, the polyimide film itself has high heat conduction efficiency, so that it can protect the heat generating element and largely transfer heat generated from the heat generating element to the lens 1000 which is tightly fixed. In addition, the thickness of the polyimide film can be as low as, for example, 0.1mm, and the occupied space is very small.

Fig. 4A to 4I are cross-sectional views of a lens 1000 having a polyimide heating film heating apparatus according to another embodiment of the present application. In fig. 4A to 4I, there are partial schematic structural diagrams obtained by magnifying the lens portions G, H, I, J, K, L, M and N by ten times (10:1), respectively, and as shown in fig. 4A, in an embodiment of the present application, the internal structure of the Polyimide (PI) heating film heating apparatus 1420 (hereinafter, referred to as the heating apparatus 1420) may be distributed as a sandwich structure of PI film 1421+ double-sided tape 1422+ heating element + double-sided tape 1422+ PI film 1421. That is, a heat generating element is disposed between the two polyimide PI films 1421, and the heat generating element is bonded to each polyimide PI film 1421 by the double-sided tape 1422. The double-sided adhesive 1422 may be one or more of a heat conductive adhesive, a heat conductive tape, an electrically conductive adhesive, and an electrically conductive tape.

Similarly, in the present embodiment, as shown in fig. 4A, the heating device 1420 can be disposed at the upper end surface 1310a of the lens 1000 at the edge 1300; the heating means 1420 is disposed at the lower end 1310B as shown in fig. 4B; the heating device 1420 is disposed at the side 1320 at the edge 1300 as shown in FIG. 4C, and may be located between the edge 1300 and the sidewall of the lens; the heating means 1420 is provided at both the upper end 1310a and the side 1320 at the edge 1300 as shown in fig. 4D; the heating means 1420 is provided at both the lower end surface 1310b and the side surface 1320 at the rim 1300 as shown in fig. 4E; the heating device 1420 of FIG. 4F is disposed at the upper end 1310a, the lower end 1310b, and the side 1320 of the rim 1300; the heating device 1420 is disposed between the edge 1300 of the lens 1000 and the edge of the lens 2000 as shown in FIG. 4G; the heating device 1420 is disposed between the lower end surface 1310b of the edge 1300 of the lens 1000 and the seal 1600 as shown in fig. 4H; and as shown in fig. 4I, the heating device 1420 is disposed between the lower end surface 1310b of the edge 1300 of the lens 1000 and the seal 1600 and the edge of the lens 2000.

Figure 5A is a cross-sectional view of a lens with a polyimide heater film heating apparatus according to another embodiment of the present application. Fig. 5B is a partial schematic structural view of the lens of fig. 5A enlarged by ten times (10:1), and as shown in fig. 5B, in one embodiment of the present application, the internal structure of the heating device 1420 may be distributed as a sandwich structure of PI film 1421+ double-sided tape 1422+ heating element + double-sided tape 1422+ PI film 1421+ heat-resistant rigid carrier 1423. That is, the PI film 1421 and the heat-resistant hard carrier 1423 may be combined into a hard carrier polyimide film, so that the protection unit 1405 including the hard carrier polyimide film has good rigidity, and when the heating device 1400 is mounted on the lens 1000, alignment can be accurately performed, thereby realizing automated production. In the multilayer structure, the double-sided adhesive 1422 may also be one or more of a thermal conductive adhesive, a thermal conductive adhesive tape, an electrical conductive adhesive, and an electrical conductive adhesive tape.

Similarly, in this embodiment, as shown in fig. 5A, the heating device 1420 can be disposed at the end 1310 of the lens 1000 at the edge 1300 (at the upper end 1310a or the lower end 1310 b); lens 1000 is at side 1320 of edge 1300 (fig. 4C); both at the end 1310 (at the upper end 1310a or the lower end 1310b) and at the side 1320 (as shown in fig. 4D, 4E and 4F) of the lens 1000 at the edge 1300; between the edge 1300 of the lens 1000 and the edge of the lens 2000 (see fig. 4G); between the lower end surface 1310b of the edge 1300 of the lens 1000 and the seal 1600 (as shown in fig. 4H); and between the lower end surface 1310b of the edge 1300 of the lens 1000 and the edge of the seal 1600 and lens 2000 (as shown in figure 4I).

Further, in another embodiment of the present application, the heating device 1400 may further include an energy supply unit (not shown). The energy supply unit may be an electrical device, such as a battery or a power supply, for supplying electrical energy to the heat generating element.

Further, in another embodiment of the present application, the heating device 1400 may further include a conductive element 1403, and the design structure of the conductive element 1403 is slightly different according to whether the protection unit 1405 is a ceramic ring or a polyimide PI film.

Fig. 6A to 6C are cross-sectional views of the conductive unit 1403 in the lens 1000 having the ceramic heating ring heating apparatus 1410 according to the embodiment of the present application. As shown in fig. 6A to 6C, when the heating device 1400 is a ceramic heating ring heating device 1410, the conductive unit 1403 thereof may have at least 2 leads 1403a for connecting the heating element and the power supply unit. The two ends of the heating element are respectively connected with the conductive unit 1403, and the conductive unit 1403 is respectively connected to the positive electrode and the negative electrode of the energy supply unit, so that the heating element is conducted, electric energy is converted into heat energy, and the heat energy is transmitted to the fixed lens 1000.

In fig. 6A, at least two leads 1403a are designed to be mounted on the same side of heating device 1410; in fig. 6B, at least two leads 1403a are designed to be mounted on both sides of the heating device 1410; in fig. 6C, at least two leads 1403a are designed to be installed at specific positions of the heating device 1410, which can be set by special requirements of the structural design of the lens including the lens 1000, and also can be set by the resistance value of the temperature-sensitive resistor of the heating element actually used. The connection of the conductive unit 1403 and the heating device 1410 can be one or more of soldering, conductive glue, conductive tape, and compression connection.

Fig. 7A, 7B and 7C are cross-sectional views of a conductive unit 1403 in a lens 1000 having a polyimide heating film heating apparatus 1420 according to another embodiment of the present application, respectively. As shown in fig. 7A, 7B and 7C, when the heating device 1400 is a polyimide heating film heating device 1420, the conductive unit 1403 thereof may have at least 2 leads 1403B for communicating the heat generating element and the power supply unit. Alternatively, when the heating device 1400 is the polyimide heating film heating device 1420, the heating device 1420 may be extended directly to serve as a power supply wire, and the heating wire inside the polyimide heating film led out as the power supply wire portion may be relatively wide to reduce the resistance value, ensuring that the power supply wire is not divided (power supply voltage).

The two ends of the heating element are respectively connected to the conductive unit 1403, and the conductive unit 1403 is respectively connected to the positive electrode and the negative electrode of the energy supply unit, so that the heating element is conducted, electric energy is converted into heat energy, and the heat energy is transmitted to the lens 1000 which is tightly fixed.

In fig. 7A, at least two leads 1403b are designed to be mounted on the outer end face of the polyimide film 1405 in the heating device 1420; also shown in fig. 7B (a) is a partial schematic structure of a lens at a magnification of ten times (10:1) at site Z, as shown in fig. 7B, at least two leads 1403B are designed to be mounted on outer end face 1405a and outer end face 1405B of polyimide film 1405 in heating apparatus 1420; in fig. 7C (a) and 7C (B), also shown are partial schematic structures of the lens at ten times (10:1) magnification of locations a and B, respectively, as shown in fig. 7C, at least two leads 1403B are designed to be mounted on the outer side 1405B and inner side 1405C of the polyimide film 1405 in the heating device 1420. In addition, the positions in the above figures are only examples, and the actual positions of at least two leads 1403b may be set according to special requirements of the structural design of the lens including the lens 1000, or may be set according to the resistance value of the temperature-sensitive resistor of the heating element actually used, for example, the end face (both inside and outside) or the side face (both inside and outside) of the polyimide film 1405, or a combination thereof. The connection of the conductive element 1403 and the heating device 1420 can be one or more of soldering, conductive glue, conductive tape, and compression connection.

Fig. 8A, 8B, 8C and 8D are cross-sectional views of the conductive elements 1403, respectively, in a lens 1000 having a polyimide heating film heating apparatus 1420, according to another embodiment of the present application. As shown in fig. 8A, 8B, 8C and 8D, when the heating device 1400 is a polyimide heating film heating device 1420, the conductive unit 1403 thereof may have at least 2 leads 1403C for communicating the heat generating element and the power supply unit. The two ends of the heating element are respectively connected with the conductive unit 1403, and the conductive unit 1403 is respectively connected to the positive electrode and the negative electrode of the energy supply unit, so that the heating element is conducted, electric energy is converted into heat energy, and the heat energy is transmitted to the fixed lens 1000. In this embodiment, a heat-resistant hard carrier is added to the polyimide PI heating film, and thus the designed mounting positions of at least 2 leads 1403c are different from those of the at least 2 leads 1403a and the at least 2 leads 1403 b.

In fig. 8A, at least two leads 1403c are designed to be mounted on the outer end face 1405a of the polyimide film 1405 in the heating device 1420; also shown in fig. 8B (a) is a partial schematic of a lens at a magnification of ten times (10:1) at site C, as shown in fig. 8B, at least two leads 1403C are designed to be mounted on the outer side surface 1405B of the polyimide film 1405 in the heating apparatus 1420; in fig. 8C (a) and 8C (b), also shown are partial schematic structures of the lens at ten times (10:1) magnification of the locations D and E, respectively, as shown in fig. 8C, at least two leads 1403C are designed to be mounted on the outer face 1405a and the inner face 1405C of the polyimide film 1405 in the heating device 1420; fig. 8d (a) also shows a partial schematic structure of a lens at a position F which is enlarged ten times (10:1), and as shown in the drawing, a polyimide heating film is used as an extension line of at least two lead lines 1403c, extended to each position of the heating device 1420, and electrically connected to a heating element and an energy supply unit. In addition, the positions in the above figures are only examples, and the actual positions of at least two leads 1403c may be set according to special requirements of the structural design of the lens including the lens 1000, or may be set according to the resistance value of the temperature-sensitive resistor of the heating element actually used, for example, the end face (both inside and outside) or the side face (both inside and outside) of the polyimide film 1405, or a combination thereof. The connection of the conductive element 1403 and the heating device 1420 can be one or more of soldering, conductive glue, conductive tape, and compression connection. The above description is only an embodiment of the present application and an illustration of the technical principles applied. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the technical idea. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A lens with a heating device comprising a lens body having opposing first and second faces and an edge connecting the first and second faces, the lens further comprising:

a heating device arranged at the edge of the lens body and used for transferring heat to the lens body after power is supplied,

wherein the heating device is configured as a ceramic heating ring or a polyimide heating film in which a heating element is disposed.

2. The lens of claim 1, wherein the heating device is disposed on at least one of an end surface and a side surface of the lens body at the edge.

3. Lens according to claim 1 or 2, characterized in that the lens is provided with a notched groove in which the heating device is provided.

4. The lens according to claim 1, characterized in that the heating device further comprises a fixing element for fixing the heating device to the rim.

5. The lens according to claim 4, characterized in that said fixing element is an elastic element, arranged in compression at said edge.

6. The lens according to claim 4, characterized in that the fixing element is a conductive glue or a conductive tape.

7. The lens according to claim 4, characterized in that the fixing element is a thermally conductive glue or a thermally conductive adhesive tape.

8. A lens barrel characterized by comprising:

a lens barrel having a sidewall; and

a plurality of lenses fixed by the side wall of the lens barrel, wherein at least one of the plurality of lenses is a lens with a heating device according to at least one of claims 1 to 7.

9. A heating device for a lens, the lens comprising a lens body having first and second opposing faces and an edge connecting the first and second faces,

characterized in that, the heating device is arranged on the edge of the lens body and comprises:

a ceramic heating ring provided with a heating element or a polyimide PI heating film.

10. A method for manufacturing a lens barrel including a heating device, the method comprising:

preparing a heating device according to claim 9;

disposing the heating device on the lens to form a lens with a heating device; and

and arranging a plurality of lenses included by the lens on the lens barrel.