A photochromic lens spin-coating cooperative temperature control system and method

Abstract

The application discloses a photochromic lens spin coating and temperature control system and method, and belongs to the technical field of precise optical lens manufacturing. The application comprises a colloid preheating subsystem, a substrate preheating subsystem, a cooperative control core and a spin coating host. The colloid preheating subsystem is used for accommodating and heating photochromic colloid and outputting a colloid temperature signal; the substrate preheating subsystem is used for heating a lens substrate and outputting an actual substrate temperature signal; the spin coating host is used for clamping and rotating the lens substrate and outputting a spin coating rotating speed signal; and the cooperative control core is used for judging whether a preset condition is met according to the colloid temperature signal, the actual substrate temperature signal and the spin coating rotating speed signal, and outputting a signal allowing a process to start to the spin coating host when the condition is met. The application realizes temperature consistency control of a colloid and a substrate interface in a whole spin coating process through real-time judgment of signals of each subsystem by the cooperative control core.

Description

Technical Field

[0001] This invention relates to the field of precision optical lens manufacturing technology, and more specifically to a photochromic lens spin-coating and temperature control system and method. Background Technology

[0002] Spin coating is a common process for preparing uniform optical thin films, especially functional coatings for photochromic lenses. It is widely used in precision optical manufacturing due to its advantages of simple operation, low cost, and high film-forming efficiency. The basic principle involves dropping a certain amount of colloid onto the center of a substrate, then rotating the substrate at high speed. Under centrifugal force, the colloid spreads and forms a film, and the solvent evaporates to form the coating.

[0003] However, in the spin-coating manufacturing of photochromic lenses, the uniformity of the coating (usually measured by the CV value of thickness variation) directly determines the lens's color-changing consistency, optical performance, and product yield. According to relevant industry standards, transmittance uniformity is one of the key quality indicators for photochromic lenses. One of the main challenges currently facing the industry is temperature mismatch: photochromic colloids typically need to maintain optimal viscosity at a specific temperature (such as around 28°C) to facilitate leveling; however, if the temperature of the lens substrate (especially the resin substrate) differs from the colloid temperature, it will cause a sudden change in local viscosity of the colloid upon contact, leading to defects such as halos and uneven thickness in the coating.

[0004] Existing technologies typically employ preheating methods such as colloidal water baths or substrate ovens, but these methods have significant shortcomings: 1. Lack of coordination and real-time performance: The preheating processes of the colloid and the substrate are independently controlled and mostly open-loop, making it impossible to ensure that the temperatures of the two reach the optimal matching state required by the process at the moment of spin coating (usually requiring a temperature difference of <1.5℃), which directly leads to defects such as halos in the coating. 2. Completely ignoring the influence of dynamic process variables: During spin coating, the high-speed rotation (usually >1500rpm) causes a sharp increase in air convection on the substrate surface (i.e., the "centrifugal temperature drop effect"), which makes the substrate edge temperature more than 2°C lower than the center. This is the main reason for the aggravated problem of coating edge thinning and the persistently high coating uniformity (CV value). 3. Risk of light pollution: Traditional broadband heating methods such as infrared tubes may leak ultraviolet or short-wave visible light, which may accidentally activate the photochromic material during the preheating stage, resulting in initial performance degradation and shortened lifespan. 4. Low adaptability and intelligence level: The heating method is fixed and cannot intelligently adjust the heating spectrum and power according to the optical and thermal properties of different lens substrates (such as glass, PC resin, etc.), which can easily lead to thermal damage to the substrate or uneven heating.

[0005] Therefore, how to propose a temperature control system and method for spin coating of photochromic lenses to achieve precise temperature coordination and dynamic adaptive regulation throughout the spin coating process is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a photochromic lens spin coating synergistic temperature control system and method to solve the coating uniformity problem caused by temperature mismatch between colloid and substrate, temperature drop caused by dynamic spin coating process and ultraviolet interference, thereby significantly improving the quality and production yield of photochromic lenses.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, the present invention discloses a photochromic lens spin coating synergistic temperature control system, including a colloidal preheating subsystem, a substrate preheating subsystem, a synergistic control center and a spin coating host; The colloid preheating subsystem is used to contain and heat the photochromic colloid and output the temperature signal of the photochromic colloid. The substrate preheating subsystem is used to heat the lens substrate and outputs the actual temperature signal of the lens substrate. The spin coating host is used to clamp and rotate the lens substrate and output a spin coating speed signal; The collaborative control center is used to determine whether the temperature signals of the lens substrate and the photochromic colloid meet preset conditions based on the temperature signal of the photochromic colloid, the actual temperature signal of the lens substrate, and the spin coating speed signal; when the preset conditions are met, the collaborative control center outputs a signal to the spin coating host to allow the process to start.

[0008] Preferably, the colloid preheating subsystem includes: The light-shielding heating jacket adopts a three-layer composite structure, consisting of an opaque outer shell, a heat insulation layer, and an observation window from the inside out. An inert gas protection unit provides an inert atmosphere to the container holding the photochromic colloid. A dual-wavelength infrared temperature measurement unit measures the temperature of the photochromic colloid and outputs the temperature signal of the photochromic colloid. A viscometer is used to measure the viscosity signal of photochromic colloids.

[0009] Preferably, the substrate preheating subsystem includes: The substrate information identification unit reads the identification information of the lens substrate and outputs the substrate material information; A visible light heating array adjusts the heating spectrum and power according to the substrate material information; An optical homogenization module is disposed between the visible light heating array and the lens substrate, which converts the incident light emitted by the visible light heating array into a surface radiation field that irradiates the lens substrate. An infrared temperature probe is aimed at the surface of the lens substrate and outputs the actual temperature signal of the lens substrate.

[0010] Preferably, the spin coating host includes: Vacuum suction cups are used to hold lens substrates; The spindle motor drives the vacuum chuck to rotate; A speed sensor detects the rotational speed of the spindle motor in real time and outputs the spin coating speed signal; An ultraviolet intensity meter is installed inside the cavity of the spin coating host and outputs an ambient ultraviolet intensity signal.

[0011] Preferably, the collaborative control center calculates the target temperature of the lens substrate according to the spin coating speed signal and a predetermined algorithm model, and determines whether the matching degree between the actual temperature of the lens substrate and the target temperature of the lens substrate meets the preset condition. Simultaneously, it is determined whether the temperature signal of the photochromic colloid, the viscosity signal of the photochromic colloid, and the intensity signal of the ambient ultraviolet radiation meet the preset conditions.

[0012] Preferably, the predetermined algorithm model satisfies the following relation: Tbase target = Tgel + K × (ω / 1000); Wherein, Tbase is the target temperature of the lens substrate; Tadhesive is the temperature of the photochromic colloid; ω is the spin coating speed; and K is the compensation coefficient. The collaborative control center calls the corresponding compensation coefficient according to the substrate material information.

[0013] Preferably, when the matching degree between the actual temperature of the lens substrate and the target temperature of the lens substrate does not meet the preset condition, the collaborative control center adjusts the heating power of the substrate preheating subsystem according to the temperature difference value; when the ambient ultraviolet intensity signal does not meet the preset condition, the collaborative control center cuts off the power supply to the colloid preheating subsystem and the substrate preheating subsystem.

[0014] On the other hand, the present invention also proposes a method for spin-coating photochromic lenses with synergistic temperature control, applied to the aforementioned spin-coating photochromic lens with synergistic temperature control system, comprising the following steps: Real-time data collection of photochromic colloid temperature, actual lens substrate temperature, spin coating speed, photochromic colloid viscosity, and ambient ultraviolet intensity; The target temperature of the lens substrate is calculated based on the spin coating speed and a predetermined algorithm model. The temperature matching degree of the lens substrate, the temperature of the photochromic colloid, the viscosity of the photochromic colloid, and the intensity of ambient ultraviolet radiation are assessed in a coordinated manner to determine whether the preset conditions are met. When all parameters meet the preset conditions, a process start signal is output; when the parameters do not meet the preset conditions, heating power adjustment or safety power-off protection is executed.

[0015] As can be seen from the above technical solution, the present invention discloses a photochromic lens spin-coating synergistic temperature control system and method, which has the following beneficial effects compared with the prior art: 1. Achieved precise coordination and dynamic stability of process temperature: Through an innovative dynamic compensation algorithm, the key dynamic variable of spin coating speed is introduced into the temperature control model. Predictive feedforward control based on real-time process status (predicting temperature drop by speed and compensating in advance) is adopted, which fundamentally solves the problem of edge temperature drop caused by centrifugal force and ensures the temperature consistency of the contact interface between photochromic colloid and lens substrate throughout the spin coating process. 2. A multi-dimensional process safety and quality control barrier has been constructed: Through UV isolation design, inert gas protection, and a four-fold rigid enablement judgment logic of "temperature difference-adhesive temperature-viscosity-UV", coating defects caused by temperature mismatch, material aging, or light pollution are significantly reduced from both physical and logical perspectives, increasing the production yield from approximately 71.5% of the traditional process to over 89.2%, which is 24.7% higher than the industry average yield. 3. Significantly improved coating uniformity and product performance: Due to the adoption of a dynamic temperature compensation algorithm, the temperature drop at the edge of the lens substrate is pre-compensated, thereby significantly reducing the thickness uniformity (CV value) of the photochromic coating from the industry average of around 12.3% to below 3.6%, an improvement of 70.7% over the industry average; at the same time, the wavelength deviation (Δλ) of the lens's color-changing response is reduced from ±7.8nm to ±2.1nm, resulting in a breakthrough improvement in the consistency of the product's optical performance, meeting the requirements for transmittance uniformity in relevant industry standards such as GB39552.1-2020; 4. Improved production intelligence and flexibility: The system can automatically adapt the heating spectrum according to the material of the lens substrate and quickly adjust the parameters according to the process formula, which reduces the product changeover preparation time from tens of minutes to less than one minute, significantly improving production efficiency and flexible manufacturing capabilities, and adapting to the production needs of different types of photochromic lenses (such as PC lenses, glass lenses, etc.). Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1The overall system architecture diagram provided for this invention; Figure 2 A schematic diagram of the colloid preheating subsystem; Figure 3 A schematic diagram illustrating the working principle of the substrate preheating subsystem; Figure 4 A logical flowchart for the coordinated control center's operation. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] On the one hand, such as Figure 1 As shown in the figure, an embodiment of the present invention discloses a photochromic lens spin coating collaborative temperature control system, including a colloidal preheating subsystem 200, a substrate preheating subsystem 300, a collaborative control center 400, and a spin coating host 500.

[0020] The colloid preheating subsystem 200, the substrate preheating subsystem 300, and the collaborative control center 400 work together with the spin coater 500, which includes a vacuum chuck 501 for holding the lens substrate 10 and a spindle motor 502 for driving its rotation.

[0021] The photochromic colloid preheating subsystem 200, the lens substrate preheating subsystem 300, and the collaborative control center 400 are integrated with analog signal lines via an industrial bus (such as a CAN bus or industrial Ethernet). Specifically: the output signal of the dual-wavelength infrared temperature measurement unit 230 is connected to the collaborative control center 400 via a 4-20mA analog signal line; the encoder pulse signal of the spindle motor 502 is connected via a high-speed counting card; the dimming signal of the visible light heating array 310 is output by the DO module of the collaborative control center 400 via PWM (pulse width modulation). All decision logic and algorithms are executed in the PLC or industrial PC of the collaborative control center 400.

[0022] The colloid preheating subsystem 200 is used to contain and heat the photochromic colloid, output the temperature signal of the photochromic colloid, and ensure that the photochromic colloid 20 is in the best and most stable state before coating.

[0023] refer to Figure 2 The colloid preheating subsystem 200 includes: The light-shielding heating jacket adopts a three-layer composite structure, consisting of an opaque outer shell 211, a heat insulation layer 212, and an observation window 213 from the outside to the inside. The outer shell 211 is made of opaque metals such as 304 stainless steel, providing mechanical strength. The heat insulation layer 212 is made of heat-insulating materials such as ceramic fiber, reducing heat loss. The inner observation window 213 is made of amber borosilicate glass, whose spectral characteristics are designed to allow operators to observe visually while blocking more than 99.9% of ultraviolet rays with wavelengths less than 400nm.

[0024] The inert gas protection unit 220 provides an inert atmosphere to the container containing the photochromic colloid. The inert gas protection unit 220 introduces argon or nitrogen into the container containing the colloid 20 through the mass flow controller 221, and uses the zirconia oxygen sensor 222 to monitor the oxygen concentration in the container and maintain it below 50 ppm, effectively slowing down the thermo-oxidative aging of the active ingredients in the colloid.

[0025] The dual-wavelength infrared temperature measurement unit 230 measures the temperature of the photochromic colloid and outputs the temperature signal of the photochromic colloid; two sensors are respectively aligned with the surface of the colloid to measure the infrared radiation intensity in the 950nm and 1550nm bands.

[0026] A viscometer is used to measure the viscosity signal of photochromic colloids.

[0027] refer to Figure 3 The substrate preheating subsystem 300 is used to heat the lens substrate and outputs the actual temperature signal of the lens substrate. It is responsible for accurately and uniformly heating the lens substrate 10 before and during spin coating.

[0028] Specifically, the substrate preheating subsystem 300 includes: The substrate information identification unit reads the identification information of the lens substrate and outputs the substrate material information. In this embodiment, a barcode scanner or RFID reader is used to read the identification code on the lens carrier or to communicate with the Manufacturing Execution System (MES) to obtain the current substrate texture. The collaborative control center 400 queries the built-in process parameter database based on this information and automatically calls the corresponding heating spectrum mode (short-wave / long-wave spectrum) and the preset compensation coefficient K value.

[0029] The visible light heating array 310 adjusts the heating spectrum and power according to the substrate material information.

[0030] The visible light heating array 310 is composed of LEDs, whose emission spectrum is strictly limited to the visible light long-wavelength region of 590nm to 750nm, completely avoiding the ultraviolet region (380-500nm) that photochromic materials are sensitive to. Furthermore, the array can be divided into different wavelengths (such as the 590-650nm short-wavelength band and the 650-750nm long-wavelength band). The collaborative control center 400 intelligently switches between wavelengths based on the material information input from the substrate information identification unit: for inorganic substrates such as glass, the more penetrating short-wavelength band is used for bulk heating; for organic substrates such as resin, the long-wavelength band is used for surface heating to avoid internal damage to the substrate due to excessive transmission.

[0031] An optical heating module 320 is disposed between the visible light heating array 310 and the lens substrate 10, and converts the incident light emitted by the visible light heating array 310 into a surface radiation field to irradiate the lens substrate.

[0032] In this embodiment, the optical heat dissipation module 320 is a mirror-finished stainless steel plate with a precision microprism array 321 etched on its surface. The tilt angle of each microprism is designed to be 55°±2°. When the light from the visible light heating array 310 shines on this plate, the microprism array 321 reflects and disperses it, transforming the potentially uneven point / line light spot into a highly uniform surface radiation field that illuminates the back of the substrate 10. Simulation and actual measurement show that an extremely uniform temperature difference of less than 0.5℃ can be achieved on the surface of a substrate with a diameter of 200mm.

[0033] An infrared temperature probe is aimed at the surface of the lens substrate and outputs the actual temperature signal of the lens substrate.

[0034] The spin coating host 500 is used to clamp and rotate the lens substrate and output a spin coating speed signal; The spin coating main unit 500 includes: Vacuum suction cup 501 is used to hold lens substrates; The spindle motor 502 drives the vacuum chuck to rotate; The speed sensor detects the rotational speed of the spindle motor in real time and outputs the spin coating speed signal; The UV intensity meter is installed inside the cavity of the spin coating host 500 and outputs the ambient UV intensity signal.

[0035] The collaborative control hub 400 communicates with the spin coater 500 via an industrial Ethernet or analog signal interface to acquire the precise rotational speed (ω) signal from the spindle encoder in real time. Simultaneously, it receives sensor signals from various locations, including: the colloid temperature (Tcolloid) from unit 230, the substrate temperature (Tsubstrate) from an infrared thermometer on the substrate surface (not shown), the colloid viscosity (η) from a viscometer built into the colloid tank (not shown), and the reading (UV) from an ambient ultraviolet sensor (not shown). The colloid viscosity (η) is measured by a rotary viscometer immersed in the colloid 20, and its signal is transmitted via an RS-485 interface; the ambient ultraviolet intensity (UV) is measured by an ultraviolet intensity meter installed inside the spin coater 500, and its signal is a 0-10V analog voltage.

[0036] The collaborative control center 400 is used to determine whether the temperature signals of the lens substrate and the photochromic colloid meet the preset conditions based on the temperature signal of the photochromic colloid, the actual temperature signal of the lens substrate, and the spin coating speed signal; when the preset conditions are met, the collaborative control center 400 outputs a signal to the spin coating host 500 to allow the process to start.

[0037] In the specific implementation process, the collaborative control center 400 calculates the target temperature of the lens substrate according to the spin coating speed signal and a predetermined algorithm model, and judges whether the matching degree between the actual temperature of the lens substrate and the target temperature of the lens substrate meets the preset conditions. Simultaneously, it is determined whether the temperature signal, viscosity signal, and ambient ultraviolet intensity signal of the photochromic colloid meet the preset conditions.

[0038] The predetermined algorithm model satisfies the following relation: Tbase target = Tgel + K × (ω / 1000); Among them, Tbase is the target temperature of the lens substrate; Tadhesive is the temperature of the photochromic colloid; ω is the spin coating speed; K is the compensation coefficient, and the collaborative control center 400 calls the corresponding compensation coefficient according to the substrate material information.

[0039] The key algorithm executed by the collaborative control center 400 is the dynamic temperature compensation algorithm. The compensation coefficient K is determined through the following steps: An experimental platform containing various typical photochromic colloids and lens substrates is constructed; theoretical temperature drop data at different rotational speeds is obtained using computational fluid dynamics (CFD) simulation; the optimal temperature difference ΔT required to maintain coating uniformity is measured experimentally; finally, ΔT is linearly fitted to (ω / 1000), and the slope of the fitted line is the K value. The typical range of K values ​​determined by this method is 0.08 to 0.16, preferably 0.12. For example, when the temperature of the photochromic colloid is 28.0℃, the rotational speed is 2000 rpm, and K is 0.12, the target Tbase = 28.0 + 0.12. (2000 / 1000) = 28.24℃. This compensation aims to preheat the lens substrate to a temperature slightly higher than that of the photochromic colloid to counteract the dynamic temperature drop that occurs after spin coating begins. For different types of lens substrates, the collaborative control center 400 stores a lookup table of compensation coefficient K values ​​corresponding to the substrate material, which is automatically retrieved after obtaining the substrate information.

[0040] When the matching degree between the actual temperature of the lens substrate and the target temperature of the lens substrate does not meet the preset conditions, the collaborative control center 400 adjusts the heating power of the substrate preheating subsystem 300 according to the temperature difference value; when the ambient ultraviolet intensity signal does not meet the preset conditions, the collaborative control center 400 cuts off the power supply of the colloid preheating subsystem 200 and the substrate preheating subsystem 300.

[0041] This embodiment also underwent experimental verification as follows: In a factory producing millions of photochromic lenses annually, the system proposed in this invention (which employs a dynamic temperature compensation algorithm and strictly executes a four-condition collaborative judgment logic) replaced the original simple preheating device. The experiment was conducted using an XX-2000 spin coater, with data acquisition performed using a YY-300 coating thickness gauge and a ZZ-500 spectrometer. Under a standard spin coater process at 2000 rpm, the comparative test results are as follows (all test data comply with GB 39552.1-2020 "Photochromic Lenses Part 1: Technical Requirements"):

[0042] On the other hand, the present invention also proposes a method for spin-coating photochromic lenses with synergistic temperature control, applied to the aforementioned spin-coating photochromic lens with synergistic temperature control system, comprising the following steps: Real-time data collection of photochromic colloid temperature, actual lens substrate temperature, spin coating speed, photochromic colloid viscosity, and ambient ultraviolet intensity; The target temperature of the lens substrate is calculated based on the spin coating speed and a predetermined algorithm model. The temperature matching degree of the lens substrate, the temperature of the photochromic colloid, the viscosity of the photochromic colloid, and the intensity of ambient ultraviolet radiation are assessed in a coordinated manner to determine whether the preset conditions are met. When all parameters meet the preset conditions, a process start signal is output; when the parameters do not meet the preset conditions, heating power adjustment or safety power-off protection is executed.

[0043] Specifically, such as Figure 4 As shown: Step S101: System startup, initialization parameters.

[0044] Step S102: Collect all sensor data in real time.

[0045] Step S103: Calculate the current T-base target based on the current spin coating speed ω using the above dynamic compensation algorithm.

[0046] Step S104: Perform an enable determination. This is a multi-parameter AND logic determination, and the following four conditions must be met simultaneously before the coordination control center 400 will send an "allow start" signal to the spin coating host 500: Condition 1 (Temperature Difference Matching): | Actual Tbase - Target Tbase| ≤ 1.5℃. This threshold is determined based on the rheological properties of the photochromic colloid. Experiments show that when the temperature difference exceeds 1.5℃, the local viscosity change rate of the colloid upon contact with the substrate will exceed 10%, leading to visible coating unevenness defects.

[0047] Condition 2 (Stable Adhesive Temperature): 27.5℃ ≤ T adhesive ≤ 28.5℃. Ensure the adhesive is within its optimal operating temperature window.

[0048] Condition 3 (Suitable viscosity): 1050cP ≤ η ≤ 1350cP. Ensure the colloidal rheology is suitable for spin coating.

[0049] Condition 4 (Environmental Safety): UV intensity < 5 μW / cm². This safety threshold is set based on the critical activation light intensity of commonly used photochromic materials to ensure that the material does not undergo pre-activation greater than 0.1% during the system preheating period, thereby protecting its initial performance.

[0050] Step S105: Determine if all conditions are met. If all conditions are met, proceed to step S106 and output a "process ready" signal, allowing the operator or automated program to start spin coating.

[0051] If any condition is not met, the system enters the exception handling and adjustment branch. The exception handling module of the collaborative control hub 400 is interlocked with the power supply circuits of each subsystem through hard-wired safety relays. The processing logic is as follows: If only condition one is not met (temperature difference exceeds the limit), the system will adjust according to the rule that power adjustment amount = temperature difference value × 10W / ℃. This proportional coefficient is obtained based on the thermal response model calibration of the substrate preheating subsystem 300, and aims to eliminate the temperature difference in the shortest adjustment time and automatically increase or decrease the heating power of the substrate preheating subsystem 300.

[0052] If condition four is not met (UV radiation exceeds the limit), it will be considered a serious alarm. The system will immediately physically cut off the power supply to all heaters and light sources in the colloidal preheating subsystem 200 and the substrate preheating subsystem 300 through the safety relay, and trigger an audible and visual alarm. The system can only be reset after manual intervention to troubleshoot the fault.

[0053] After adjustment or alarm handling, the process returns to step S102 to continue monitoring and judgment until all conditions are met.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photochromic lens spin-coating and temperature control system, characterized in that, It includes a colloid preheating subsystem, a substrate preheating subsystem, a collaborative control center, and a spin coating main unit; The colloidal preheating subsystem is used to contain and heat the photochromic colloid and output the temperature signal of the photochromic colloid. The substrate preheating subsystem is used to heat the lens substrate and outputs the actual temperature signal of the lens substrate. The spin coating host is used to clamp and rotate the lens substrate and output a spin coating speed signal; The collaborative control center is used to determine whether the temperature signals of the lens substrate and the photochromic colloid meet preset conditions based on the temperature signal of the photochromic colloid, the actual temperature signal of the lens substrate, and the spin coating speed signal; when the preset conditions are met, the collaborative control center outputs a signal to the spin coating host to allow the process to start.

2. The photochromic lens spin-coating and temperature control system according to claim 1, characterized in that, The colloidal preheating subsystem includes: The light-shielding heating jacket adopts a three-layer composite structure, consisting of an opaque outer shell, a heat insulation layer, and an observation window from the inside out. An inert gas protection unit provides an inert atmosphere to the container holding the photochromic colloid. A dual-wavelength infrared temperature measurement unit measures the temperature of the photochromic colloid and outputs the temperature signal of the photochromic colloid. A viscometer is used to measure the viscosity signal of photochromic colloids.

3. The photochromic lens spin-coating synergistic temperature control system according to claim 1, characterized in that, The substrate preheating subsystem includes: The substrate information identification unit reads the identification information of the lens substrate and outputs the substrate material information; A visible light heating array adjusts the heating spectrum and power according to the substrate material information; An optical homogenization module is disposed between the visible light heating array and the lens substrate, which converts the incident light emitted by the visible light heating array into a surface radiation field that irradiates the lens substrate. An infrared temperature probe is aimed at the surface of the lens substrate and outputs the actual temperature signal of the lens substrate.

4. The photochromic lens spin-coating synergistic temperature control system according to claim 1, characterized in that, The spin coating host includes: Vacuum suction cups are used to hold lens substrates; The spindle motor drives the vacuum chuck to rotate; A speed sensor detects the rotational speed of the spindle motor in real time and outputs the spin coating speed signal; An ultraviolet intensity meter is installed inside the cavity of the spin coating host and outputs an ambient ultraviolet intensity signal.

5. The photochromic lens spin-coating and temperature control system according to claim 3, characterized in that, The collaborative control center calculates the target temperature of the lens substrate according to the spin coating speed signal and a predetermined algorithm model, and determines whether the matching degree between the actual temperature of the lens substrate and the target temperature of the lens substrate meets the preset conditions. Simultaneously, it is determined whether the temperature signal of the photochromic colloid, the viscosity signal of the photochromic colloid, and the intensity signal of the ambient ultraviolet radiation meet the preset conditions.

6. The photochromic lens spin-coating synergistic temperature control system according to claim 5, characterized in that, The predetermined algorithm model satisfies the following relation: Tbase target = Tgel + K × (ω / 1000); Wherein, Tbase is the target temperature of the lens substrate; Tadhesive is the temperature of the photochromic colloid; ω is the spin coating speed; and K is the compensation coefficient. The collaborative control center calls the corresponding compensation coefficient according to the substrate material information.

7. The photochromic lens spin-coating and temperature control system according to claim 1, characterized in that, When the matching degree between the actual temperature of the lens substrate and the target temperature of the lens substrate does not meet the preset condition, the collaborative control center adjusts the heating power of the substrate preheating subsystem according to the temperature difference value; when the ambient ultraviolet intensity signal does not meet the preset condition, the collaborative control center cuts off the power supply to the colloid preheating subsystem and the substrate preheating subsystem.

8. A method for spin-coating photochromic lenses with synergistic temperature control, characterized in that, The system, applied to a spin-coating and temperature control system for photochromic lenses as described in any one of claims 1-7, includes the following steps: Real-time data collection of photochromic colloid temperature, actual lens substrate temperature, spin coating speed, photochromic colloid viscosity, and ambient ultraviolet intensity; The target temperature of the lens substrate is calculated based on the spin coating speed and a predetermined algorithm model. The temperature matching degree of the lens substrate, the temperature of the photochromic colloid, the viscosity of the photochromic colloid, and the intensity of ambient ultraviolet radiation are assessed in a coordinated manner to determine whether the preset conditions are met. When all parameters meet the preset conditions, a process start signal is output; when the parameters do not meet the preset conditions, heating power adjustment or safety power-off protection is executed.

Images