Replaceable anti-fog film for lens of polarization tester

Abstract

The utility model relates to a replaceable anti-fog film for a lens of a polarization tester. The replaceable anti-fog film comprises an adhesive layer, a base film layer, an anti-fog coating, a glossiness coating and a protective layer which are sequentially stacked, a heat conduction layer is arranged in the protection layer, and the heat conduction layer is in heat transfer contact with the heating assembly; and heat generated by the heating assembly is diffused to the whole plane of the anti-fog film through the heat conduction layer. The utility model has the beneficial effects that the fog can be effectively prevented from being formed, the light transmission is good, the glossiness is high, the pollution resistance and the weather resistance are high, and the surface hardness is excellent; the anti-fogging film has the advantages that the film is prevented from being damaged, the heating efficiency is high, the heat is quickly and uniformly dispersed, and the temperature range can be accurately controlled; and the use requirements of the polarized light tester lens are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to polariscope anti-fog technical field, especially a replaceable anti-fog film for polariscope lens. BACKGROUND

[0002] Polariscope studies the optical properties of materials by analyzing the polarization characteristics of light. Its basic working principle is to use polarizing plates to control the polarization of light. A polariscope usually includes a light source, two polarizing plates (or filters) and a detection device. The natural light emitted by the light source becomes linearly polarized light after passing through the first polarizing plate. When passing through the sample to be tested, the polarization state of the light may change, depending on the optical properties of the sample, such as refractive index, absorption, stress distribution, etc. After passing through the sample, the light passes through the second polarizing plate (analysis plate) again. According to the angle change of the second polarizing plate, the transmitted light intensity will also change. These changes are closely related to the characteristics of the sample. By measuring the relationship between the transmitted light intensity and the angle of the polarizing plate, the optical information of the sample can be obtained, such as refractive index, optical uniformity, stress distribution, etc. Polariscope is widely used in material analysis, liquid crystal display detection, optical element quality control and other fields. Its core advantage is that it can deeply analyze the optical changes inside the material in a non-destructive way, providing high-precision test results.

[0003] In order to ensure the accuracy of its measurement results, the polariscope needs to be calibrated regularly, especially in the following three aspects: relative temperature, relative humidity and vibration influence.

[0004] Relative temperature is one of the most important environmental parameters of the polariscope. Since temperature changes will affect the speed of light propagation, the refractive index of the sample and the stability of the electronic equipment inside the tester, the accuracy and precision of the polariscope may be significantly affected. For example, causing the refractive index of light to change, the speed of light propagation at different temperatures will be different, which may cause the deviation of the measured value; causing the volume of the sample to change, the temperature change of the solution may cause the sample to expand or shrink, thereby affecting the measurement of optical rotation; interfering with the stability of the instrument electronics, temperature fluctuations may affect the electronic circuit of the polariscope, especially the working accuracy of the temperature sensor, display and other digital components.

[0005] The relative humidity change also has a significant impact on the polarizing tester. In some sensitive equipment, excessive humidity can cause some problems, especially in humid or water vapor conditions. For example, it can cause changes in the state of the sample, and the solubility or viscosity of certain chemicals can change with humidity, affecting the measurement results; it can cause the instrument's electronic components to be damp, and excessive humidity can cause the internal circuit of the instrument to be damp, affecting the measurement accuracy and even damaging the instrument; it can cause fogging of the lens and optical elements, and excessive humidity can cause fogging on the surface of the optical elements of the tester, affecting the light propagation path and causing errors in the polarizing angle measurement.

[0006] Vibration specifically refers to the laboratory must not have any vibration that can affect the measurement accuracy, and the workbench used to place the calibrated instrument must be stable, otherwise it will seriously affect the accuracy of the measurement results.

[0007] Therefore, the lens anti-fog film was first developed to solve the fogging problem on optical lenses, camera lenses, and glasses. Fogging is usually caused by water vapor condensation between the lens surface and the air in a temperature difference or high humidity environment. This phenomenon not only affects the clarity of the lens, but also can cause damage to the equipment.

[0008] The working principle of the current anti-fog film is mainly based on two ways. The first way is physical anti-fog, which is through special coating treatment to make the lens surface have a hydrophilic or super-hydrophobic property, so that the water is evenly distributed, avoiding water vapor condensation into fog. This coating can usually increase the contact area between water droplets and the lens, allowing water to be evenly distributed on the lens surface, thereby preventing water vapor from condensing into fog. However, the anti-fog coating technology has durability problems and sensitivity to external conditions. The durability problem refers to the fact that the effect of the anti-fog coating may weaken over time, especially in the case of frequent contact with water or friction, the effect of the coating will decay. The sensitivity to external conditions problem is that in extreme humidity or severe temperature difference environments, the anti-fog effect may be greatly reduced. The second way is heating anti-fog, which mainly heats the lens surface to a temperature higher than the environment, thereby avoiding water vapor condensation into fog. Similarly, this technology has the disadvantages of high power consumption and high cost. High power consumption means that the heating film needs to be powered continuously, which can increase the wear and tear of the equipment. High cost means that the heating film technology has a higher cost than the coating technology and requires additional power support.

[0009] In view of the problem of strict calibration conditions in polarizing testers, a special anti-fog film product is developed and designed, which can satisfy the adjustment of relative temperature and relative humidity, and can also be quickly replaced. SUMMARY

[0010] The utility model discloses a purpose at overcoming the defects of prior art, provide a kind of replaceable fog-proof film for polarized light tester lens, solve the problem that current polarized light tester must be calibrated under very strict environmental conditions.

[0011] Need to be explained, polarized light tester is very strict to use environment, especially more strict in the calibration process of polarized light tester itself: first, temperature is required in (20±10) ℃ interval;Second, the relative humidity of environment cannot exceed 65%;Third, there must be no any vibration that can influence measurement accuracy in laboratory, and the workbench for placing calibrated instrument must be stable.

[0012] In the current industry, in order to reduce the requirement standard of polarized light tester to environment when calibrating itself, some auxiliary mechanisms for reducing vibration are designed.And, the relative humidity in general calibration room also will not exceed 65%, so the general calibration room also meets the humidity requirement.But air conditioner often needs to be installed in calibration room to meet the calibration test requirement.Although it is not difficult to find calibration room with air conditioner, but there is still certain requirement to temperature environment.

[0013] Therefore, a replaceable fog-proof film is designed at the lens of polarized light tester in the scheme, the fog-proof film can generate heat to control temperature, so that the requirement to calibration room is greatly reduced, even a common room can complete calibration.Although there are some fog-proof films using heating at present, when these fog-proof films are used at the lens of polarized light tester, the penetration of light will be affected, and temperature control is also not accurate enough.Therefore, the existing fog-proof film is improved and innovated in the scheme, so that it meets the technical requirement of calibration of polarized light tester.

[0014] The utility model discloses a purpose is realized through following technical scheme: a kind of replaceable fog-proof film for polarized light tester lens, including sequentially stacked settings adhesion layer, base film layer, fog-proof coating, glossiness coating, protective layer;

[0015] The protective layer is double-layer structure, and the heat conduction layer is clamped;Heat conduction layer is circumferentially provided with a transmission member, and the transmission member is provided with a heating assembly;

[0016] The heat generated by the heating assembly is transmitted to the heat conduction layer along the circumferential edge position through the transmission member, and finally the entire heat conduction layer is in a certain temperature range.

[0017] Further, the adhesion layer, base film layer, fog-proof coating, glossiness coating, heat conduction layer and protective layer are all circular, and the transmission member is annular.

[0018] Further, the adhesive layer is a layer of adhesive, the base film layer is a polyester film base film layer, the anti-fog coating layer is a polytetrafluoroethylene anti-fog coating layer, the gloss coating layer is a silica gloss coating layer, and the protective layer is a polyurethane protective layer.

[0019] Further, the adhesive layer is a layer of adhesive, the base film layer is a polyester film base film layer, the anti-fog coating layer is a polytetrafluoroethylene anti-fog coating layer, the gloss coating layer is a silica gloss coating layer, and the protective layer is a polyurethane protective layer. The heat-conducting layer is transparent aluminum oxide (Al2O3), and the transmission member is a graphite thin layer.

[0020] As a preferred technical solution of the present application, the heat-conducting layer is a graphite thin layer.

[0021] As a preferred technical solution of the present application, the heating assembly comprises a heating resistor, a controller, and a temperature sensor; the heating resistor is electrically connected to the controller; and the temperature sensor is electrically connected to the controller through a temperature sensor amplifier.

[0022] Further, in the heating assembly, the heating resistor is a carbon fiber thin block, the controller is a PID controller, the temperature sensor is a K-type thermocouple temperature sensor, and the temperature sensor amplifier is a single-chip thermocouple digital converter with amplification function.

[0023] Further, the heating assembly is adhered to the transmission member.

[0024] The present application has the following advantages:

[0025] (1) Fewer layers, meeting the use requirements of the lens of the polarized light tester.

[0026] According to the general design idea of anti-fog film, if used in a polarized light tester, it will be designed as follows: the main layers include an adhesive layer, a base film layer, an anti-fog coating layer, a gloss coating layer, an anti-reflective coating layer, a hydrophilic coating layer, a protective layer, and an anti-fouling layer, and then an additional heating layer is added. However, the light transmission performance is seriously affected.

[0027] In the scheme, the main film layers are selected in turn as follows: 10 nm of an adhesion layer, 500 nm of a polyester film type base film layer, 35 nm of a polytetrafluoroethylene type anti-fog coating layer, 30 nm of a silicon dioxide type gloss coating layer, and 200 nm of a polyurethane protective layer. Then, a special 100 nm transparent aluminum oxide heat conduction layer is added. These thicknesses and the combination of the layers make the anti-fog film of the scheme have the following functions: not only can it effectively prevent fog formation, but also the light will not be greatly affected (visual clarity is guaranteed), and it also has high gloss, stain resistance, weather resistance, and excellent surface hardness, meeting the use requirements of the polarized test instrument lens (it should be noted that the materials of the film layers are prior art in the anti-fog film field, and the innovation of the scheme is only to stack the corresponding materials and design the thickness of each film).

[0028] II. Anti-fogging without damaging the film, high heating efficiency, rapid and uniform heat dispersion, precise temperature control, and suitable for the use requirements of the polarized test instrument lens.

[0029] In general anti-fog films, the temperature generated by the heating component cannot be precisely controlled; especially when a conventional heating component is used in the stacked film structure of the scheme, the heat cannot be evenly dissipated, which not only cannot precisely control the temperature, but also easily causes damage to the anti-fog film.

[0030] In the scheme, carbon fiber thin blocks are used as heating resistors, which can efficiently convert electrical energy into heat energy, have a sensitive response, and are beneficial to rapid temperature control. In addition, graphite thin layers are used as transfer pieces, which can rapidly disperse heat on the transfer pieces--avoiding heat concentration in one place and thus avoiding damage to the film, and then gradually transferring heat from the transfer piece to the center through the circumferential edge of the heat conduction layer, achieving good anti-fogging effect without damaging the anti-fog film.

[0031] Furthermore, in the scheme, a K-type thermocouple is used as a temperature sensor, which can exhibit good linear output within a temperature range; then the voltage signal generated by the K-type thermocouple is transmitted to a single-chip thermocouple digital converter (such as MAX6675 produced by Maxim Company) with amplification function, which amplifies the voltage signal and converts it into a digital signal; the digital signal is transmitted to a PID controller, which controls the heating of the carbon fiber thin blocks; thus, precise control of the temperature of the anti-fog film can be achieved.

[0032] Therefore, it can be said that the scheme has high heating efficiency, and the heat can be rapidly transferred without being concentrated in one place (even if the heating efficiency is high, the anti-fog film will not be damaged), and the heating situation can be precisely controlled, thus meeting the use requirements of the polarized test instrument lens. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of one angle of the present application;

[0034] Figure 2 is a structural schematic view of another angle of the present application;

[0035] Figure 3 is a structural schematic view of the heat transfer piece and the heating assembly;

[0036] Figure 4 is a circuit diagram of the MAX6675 type single-chip thermocouple digital converter;

[0037] Figure 5 is a control logic schematic view of the heating assembly;

[0038] In the figure: 1 - attachment layer, 2 - base film layer, 3 - anti-fog coating, 4 - gloss coating, 6 - protective layer;

[0039] 51 - heat-conducting layer, 52 - transfer piece, 53 - heating assembly, 5301 - heating resistor, 5302 - controller, 5303 - temperature sensor, 5304 - temperature sensor amplifier. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the accompanying drawings, but the protection scope of the present application is not limited to the following description.

[0041] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0042] It should be noted that the polarized test instrument on the market usually adopts integrated design and integrates multiple core components, such as distance adjusting device, CCD receiving camera, polarizer, sample placement area to be tested, and light source. These instruments have very strict requirements on the environment in actual use, especially under the conditions of temperature and humidity, the lens and optical system are often affected by factors such as fog and dust, resulting in a decrease in measurement accuracy and reliability. Therefore, the calibration process of the polarized test instrument is crucial to the test accuracy and accuracy, and three key environmental conditions must be strictly followed during the experiment: first, the temperature in the calibration room needs to be kept between (20±10)℃; second, the relative humidity of the environment cannot exceed 65%; third, there must be no vibration that may affect the measurement accuracy in the laboratory, and the workbench used to place the calibrated instrument must be stable.

[0043] There are special workbenches on the market that can be used to firmly fix the calibration instrument to meet the third condition. However, for the first two environmental conditions, especially the influence of temperature and humidity on the lens, the design focuses on optimizing this aspect. The core of the design is a multifunctional and replaceable anti-fog film. Its role is not only to prevent water vapor from appearing on the lens, but also to reduce the relative humidity around the lens through special design to ensure that the humidity of the lens remains below 65% during the experiment, meeting the humidity requirements during calibration. To further improve the effect of the design, a heat-conducting heating layer is embedded under the protective layer of the anti-fog film. The heat-conducting heating layer can effectively remove the water vapor on the surface of the lens, while accurately controlling the temperature to ensure that the temperature of the lens always maintains within the range of (20±10)℃, thereby meeting the temperature requirements of the calibration conditions. The introduction of the heat-conducting heating layer not only improves the anti-fog effect, but also provides more precise adjustment function for the temperature control of the lens.

[0044] As shown in Figures 1-5 An replaceable anti-fog film for polarized test instrument lens, comprising an adhesive layer 1, a base film layer 2, an anti-fog coating layer 3, a gloss coating layer 4, and a protective layer 6 arranged in sequence;

[0045] Moreover, the protective layer 6 is a double-layer structure, and a heat-conducting layer 51 is clamped in the protective layer 6; a transmission member 52 is arranged around the circumferential edge of the heat-conducting layer 51, and a heating assembly 53 is arranged on the transmission member 52;

[0046] In addition, the adhesive layer 1, the base film layer 2, the anti-fog coating layer 3, the gloss coating layer 4, the protective layer 6, and the heat-conducting layer 51 are all circular thin layers, and the transmission member 52 is also a circular thin layer;

[0047] When the heating assembly 53 generates heat, the heat is first relatively uniformly distributed on the transmission member 52, and then the heat is transmitted from the circumferential annular portion to the heat-conducting layer 51 through the transmission member 52--the heat is gradually transmitted to the center position through the edge of the heat-conducting layer 51, so that the heat transmission is more uniform.

[0048] The following is a further description of each film layer.

[0049] The adhesive layer 1 is a 10nm adhesive. It ensures that the anti-fog film can be firmly attached to the surface of the product and can be easily removed after use without leaving any traces; while ensuring adhesion, it avoids affecting the subsequent use of the film due to excessive adhesion.

[0050] The base film layer 2 is a 500nm polyester thin film base film layer, which has excellent optical transparency, fog resistance and good surface wettability, and does not degrade in performance for long-term use in various environments (suitable for use in various calibration environments); in addition, the surface properties of the 500nm polyester thin film base film layer enable it to serve as both a base film layer and an anti-reflection coating, and ensure mechanical strength.

[0051] The anti-fog coating 3 is a 35nm polytetrafluoroethylene anti-fog coating, the surface structure of which can effectively prevent water droplets from adhering and promote the sliding of water droplets, thereby avoiding the formation of fog; in addition, the 35nm polytetrafluoroethylene anti-fog coating has strong hydrophilicity, which not only meets the requirements of an anti-fog coating, but also plays the role of a hydrophilic coating, further improving the anti-fog effect and cleanliness of the film, and the thickness of 35nm ensures that the anti-fog property and hydrophilicity are fully exerted.

[0052] The gloss coating 4 is a 30nm silica gloss coating, which improves the gloss of the film and maintains the high reflectivity of the film surface, thereby avoiding the appearance of too matte an effect. In addition, the silica gloss coating also has strong stain resistance, which can effectively prevent the adhesion of dust and stains and maintain the cleanliness and brightness of the film surface. The thickness of 30nm provides sufficient gloss while maintaining the high transparency of the film.

[0053] The protective layer 6 is a 200nm polyurethane protective layer formed by two 100nm polyurethane layers (i.e., polyurethane layer a and polyurethane layer b), which not only has high transparency to ensure that the visual effect of the film is not affected, but also has excellent surface hardness to effectively resist external physical damage. In addition, it also ensures the smoothness of the anti-fog film.

[0054] The heat-conducting layer 51 is a 100nm transparent aluminum oxide heat-conducting layer. Aluminum oxide material has very high thermal conductivity in a pure state, and its transparency can also be guaranteed under certain conditions. Transparent aluminum oxide is very effective in high-temperature environments and is widely used in optical and high-temperature applications.

[0055] It should be noted that the structure and thickness of the six layers of the anti-fog film, i.e., the adhesion layer 1, the base film layer 2, the anti-fog coating 3, the gloss coating 4, the protective layer 6, and the heat-conducting layer 51, enable the entire anti-fog film to effectively prevent fog formation and have high visual clarity, high gloss, stain resistance, weather resistance, and excellent surface hardness, ensuring high performance and long-term stability of the anti-fog film in actual applications, thereby enabling the anti-fog film to meet the use requirements of the lens of a polarized light tester.

[0056] The transmission member 52 will be further described below.

[0057] The heat transfer element 52 is a thin layer of graphite, which not only has high thermal conductivity but also maintains stability at high temperatures, making it particularly suitable for heat transfer in thin film structures. When the heating component 53 generates heat, it can quickly and evenly distribute the heat on the heat transfer element 52, preventing heat from concentrating in one place on the heat transfer element 52, thereby avoiding damage to the protective layer 6 and the thermally conductive layer 51 during the heat transfer process (high-temperature heat transfer).

[0058] Furthermore, the heating component 53 will be described in more detail.

[0059] like Figure 3 As shown, the heating component 53 includes a heating resistor 5301, a controller 5302, and a temperature sensor 5303; the heating resistor 5301 is electrically connected to the controller 5302; the temperature sensor 5303 is electrically connected to the controller 5302 via a temperature sensor amplifier 5304. Power is supplied to the controller 5302, temperature sensor 5303, and temperature sensor amplifier 5304 via cables.

[0060] Among them, the heating resistor 5301 is a carbon fiber block, which not only has good resistance characteristics and can efficiently convert electrical energy into heat energy, but also has high mechanical strength and flexibility, making it very suitable for use in thin film heaters.

[0061] Furthermore, the temperature sensor 5303 is a type K thermocouple temperature sensor, consisting of two different metal materials connected to form a junction. When the temperature changes, a tiny voltage (typically in the millivolt range) is generated at the junction, exhibiting good linearity across the temperature range. In addition, because the voltage output by the thermocouple is very small, it usually needs to be amplified and converted by a signal conditioning circuit before subsequent processing. Therefore, the temperature sensor amplifier 5304 is selected (the temperature sensor amplifier 5304 is a monolithic thermocouple-to-digital converter with amplification function, for example, ...). Figure 4As shown, MAX6675 temperature sensor amplifier module from Maxim is selected, which is an integrated circuit specifically designed to process thermocouple signals. MAX6675 can convert the tiny analog signals of the thermocouple into digital signals. Then the MAX6675 temperature sensor amplifier module is connected to the PID controller through the SPI mechanism. The PID controller accurately controls the temperature by adjusting the current of the heating element according to the difference between the set target temperature and the current temperature. The working principle of the PID controller is based on three control parameters: proportion (P), integral (I) and derivative (D). The proportional part adjusts the output according to the error between the current temperature and the target temperature; the integral part eliminates long-term error accumulation; the derivative part anticipates future errors by responding to temperature change rates, thereby improving the response speed and stability of the system. In practical application, the PID controller controls the start and stop of the heater according to the set temperature range (10℃-30℃). When the temperature of the anti-fog film is lower than the set low temperature threshold of 10℃, the PID controller outputs a signal to start the heating element to heat the film surface; when the temperature is higher than the high temperature threshold of 30℃, the controller will turn off the heating element to avoid high temperature and protect the safety of the system and the film material.

[0062] As shown in Figure 5 The general working process of the heating assembly 53 is as follows: (1) Temperature detection: K-type thermocouple monitors the temperature of the transmission member 52 in real time and transmits data to the MAX6675 temperature sensor amplifier module. (2) Signal amplification and conversion: MAX6675 converts the thermocouple signal into a digital signal and transmits it to the PID controller. (3) PID control: The temperature controller (PID controller) receives the difference between the current temperature and the set temperature and calculates the appropriate adjustment amount. According to the calculation result, the working state of the heating element is controlled. (4) Temperature regulation: If the temperature is lower than 10℃, the PID controller starts the heating element; if the temperature exceeds 30℃, the PID controller turns off the heating element, so as to keep the temperature within the required range.

[0063] In simple terms, the heating assembly 53 can achieve efficient and stable temperature control through precise heating element materials (such as carbon fiber), high-efficiency heat-conducting materials (such as graphite), precise temperature sensors (such as K-type thermocouples), signal conditioning circuits (such as MAX6675) and PID temperature control technology, ensuring that the anti-fog film works within the temperature range of 10℃ to 30℃. Not only effectively eliminates fog, provides clear visual experience, but also meets important temperature calibration conditions, suitable for use in polarized test instrument lenses.

[0064] It should be noted that the K-type thermocouple, MAX6675 temperature sensor amplifier module, PID controller, carbon fiber sheet and other components are prior art, and the present scheme only electrically connects these existing components to achieve the corresponding functions.

[0065] Further, the heating resistor 5301, the controller 5302, the temperature sensor 5303, and the temperature sensor amplifier 5304 in the heating assembly 53 are all adhered to the transmission member 52.

[0066] Alternatively, the heating resistor 5301 can be designed in a small block shape (e.g., rectangular), and multiple heating resistors 5301 can be arranged in the circumferential direction of the transmission member 52. Alternatively, the heating resistor 5301 can be designed in a ring shape, and the heating resistor 5301 can be adhered to the surface of the ring-shaped transmission member 52 with the center of the circle.

[0067] Compared with the prior art, the present scheme has the following advantages:

[0068] I. Compared with existing products, the structure of the present patent is simpler (assuming 8 functions are implemented, the existing patent requires 8 materials, while the present patent only needs 6 materials) under the premise of implementing the same number of functions.

[0069] Specifically, the replaceable anti-fog film suitable for a polarized tester combines two current mainstream anti-fog technologies into one, not only containing an anti-fog coating for anti-fogging, but also designing multiple functional layers. For example, an adhesive layer, a base film layer, a gloss coating layer, an anti-reflection coating layer, a hydrophilic coating layer, a protective layer, and a stain-resistant layer, a total of eight functional layers. However, through the multi-functional characteristics of the materials, the number of internal layers in the anti-fog film can be reduced, that is, the amount of required materials is reduced, but the total number of functions that can be achieved remains unchanged. For example, polyester film PET can simultaneously satisfy the functions of the base film layer and the anti-reflection coating layer due to its high light transmittance and good weather resistance; polytetrafluoroethylene can simultaneously satisfy the functions of the anti-fog coating and the hydrophilic coating due to its good hydrophilicity; and silicon dioxide can simultaneously satisfy the functions of the gloss coating layer and the stain-resistant layer due to its high refractive index and certain stain resistance. In addition, a miniature carbon fiber heating element is arranged in the outermost protective interlayer of the anti-fog film, which not only enhances the anti-fogging ability, but also meets the calibration condition that the experimental environment of the polarized tester is (20±10)℃.

[0070] II. By controlling the heating element to control the lens temperature to the range of (20±10)℃, and by the anti-fog film, the relative humidity of the lens is controlled to be below 65%.

[0071] Specifically, to control the lens surface temperature in the range of (20±10)℃, first of all, a temperature control system needs to be designed, and the PID controller can adjust the working state of the heating element according to the temperature deviation. The control process of PID: the proportional term (P) decides the heating intensity according to the difference between the current temperature and the set temperature; the integral term (I) accumulates the change of error, which helps to eliminate long-term deviation; the differential term (D) adjusts the control action according to the rate of error change, so as to avoid excessive temperature fluctuation. For example, when the temperature is lower than the target range, turn on the heating element; when the temperature is higher than the target range, turn off or reduce the heating power to prevent excessive heating. Ensure that the heating element works in this range, and fine-tune the heating power to maintain the temperature in this interval.

[0072] Using an anti-fog film can reduce condensation on the lens surface. Anti-fog films generally improve visibility or protect surfaces by preventing water droplets or fog from condensing on the surface. Its working principle is to change the surface tension of the lens so that water vapor cannot gather into water droplets on its surface, thereby reducing the accumulation of moisture. Since the polarimeter needs to be measured under precise conditions, in a strict laboratory environment, when the relative humidity of the lens is generally greater than 65%, condensation of water vapor will occur on the lens surface, forming fog, because the temperature of the lens is lower than the dew point temperature of the surrounding air, so that the moisture in the air condenses into tiny water droplets on the lens surface, affecting the clarity and shooting quality of the lens. In a laboratory environment, when the relative humidity of the lens is generally less than 65%, the lens surface is in a dry state, and in a low humidity environment, there is less moisture in the air, and the lens surface is usually dry and not prone to fog or water droplets. The shooting quality of the lens is extremely high, and the image clarity is good. Therefore, to control the relative humidity of the lens below 65%, an anti-fog film can be used to achieve this. Anti-fog films can help reduce condensation on the surface of objects and prevent excessive moisture accumulation. During the experiment, when the lens surface is in a dry state, it indicates that the relative humidity of the lens surface has been reduced to below 65%.

[0073] III. Replaceable design, easy to disassemble, and strong versatility.

[0074] Specifically, since the anti-fog film is a consumable, it needs to be replaced in time after its efficacy is weakened to avoid errors in measurement experiments. The present application uses adhesive as the adhesive layer material of the anti-fog film, which is based on the characteristics of the adhesive being transparent, firm and leaving no traces when removed, thus facilitating the replacement of the anti-fog film by the user. In addition, the replaceable design of the adhesive layer not only focuses on the selection of the adhesive, but also can be combined with micro-structure surface treatment or special coating technology to enhance its performance under specific conditions, so that the entire system has higher reliability and durability.

[0075] In summary, in this scheme:(1) the multifunctional layer design of the anti-fog film realizes more functions with less material. Not only can it meet the basic efficacy of defogging, but also add additional functional layers. And it meets the calibration conditions of the humidity requirement of the polarized light tester;(2) the micro-heating element is arranged in the protective layer of the anti-fog film to realize the control of the temperature of the lens surface to meet the calibration conditions of the relative temperature of the polarized light tester;(3) the replaceability of the anti-fog film is convenient for the user to replace and does not damage the quality of the lens.

[0076] The above embodiments only express the preferred implementation, which is described in detail, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A replaceable anti-fog film for a polarizing tester lens, characterized in that: It includes an adhesion layer (1), a base film layer (2), an anti-fog coating (3), a gloss coating (4), and a protective layer (6) stacked sequentially. The protective layer (6) has a double-layer structure, which clamps the heat-conducting layer (51); a transfer member (52) is arranged around the circumferential edge of the heat-conducting layer (51), and a heating component (53) is arranged on the transfer member (52). The heat generated by the heating component (53) is transferred to the heat-conducting layer (51) along the circumferential edge via the transfer member (52), and finally the entire heat-conducting layer (51) is kept within a certain temperature range.

2. The replaceable anti-fog film for a polarizer lens according to claim 1, characterized in that: The adhesion layer (1), base film layer (2), anti-fog coating (3), gloss coating (4), heat-conducting layer (51), and protective layer (6) are all circular, and the transmission component (52) is annular.

3. A replaceable anti-fog film for a polarizer lens according to claim 1 or 2, characterized in that: The adhesion layer (1) is an adhesive layer, the base film layer (2) is a polyester film base film layer, the anti-fog coating (3) is a polytetrafluoroethylene anti-fog coating, the gloss coating (4) is a silica gloss coating, and the protective layer (6) is a polyurethane protective layer. The heat-conducting layer (51) is transparent aluminum oxide, and the heat transfer element (52) is a thin layer of graphite.

4. A replaceable anti-fog film for a polarizer lens according to claim 3, characterized in that: The thickness of the adhesion layer (1) is 10 nm, the thickness of the base film layer (2) is 500 nm, the thickness of the anti-fog coating (3) is 35 nm, the thickness of the gloss coating (4) is 30 nm, and the thickness of the protective layer (6) is 200 nm. The thickness of the heat-conducting layer (51) is 100 nm, and the thickness of the transfer element (52) is 50 nm.

5. A replaceable anti-fog film for a polarizer lens according to any one of claims 1, 2, and 4, characterized in that: The heating component (53) includes a heating resistor (5301), a controller (5302), and a temperature sensor (5303); The heating resistor (5301) is electrically connected to the controller (5302); The temperature sensor (5303) is electrically connected to the controller (5302) via a temperature sensor amplifier (5304).

6. A replaceable anti-fog film for a polarizer lens according to claim 3, characterized in that: The heating component (53) includes a heating resistor (5301), a controller (5302), and a temperature sensor (5303); The heating resistor (5301) is electrically connected to the controller (5302); The temperature sensor (5303) is electrically connected to the controller (5302) via a temperature sensor amplifier (5304).

7. A replaceable anti-fog film for a polarizer lens according to claim 5, characterized in that: In the heating component (53): the heating resistor (5301) is a carbon fiber block, the controller (5302) is a PID controller, the temperature sensor (5303) is a K-type thermocouple temperature sensor, and the temperature sensor amplifier (5304) is a monolithic thermocouple digital converter with amplification function.

8. A replaceable anti-fog film for a polarizer lens according to claim 5, characterized in that: The heating component (53) is adhered to the transfer member (52).

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