CN-122018107-A - Controllable clamping method for adhesive layer of adhesive-sandwiched double-sided mirror

CN122018107ACN 122018107 ACN122018107 ACN 122018107ACN-122018107-A

Abstract

The invention discloses a controllable clamping method for a double-sided mirror adhesive layer with adhesive therebetween, which comprises the following steps of S1, constructing a symmetrical adjustable press-mounting clamping mechanism, S2, implementing adhesive layer thickness presetting and initial positioning, S3, implementing dynamic pressure regulation and adhesive layer leveling, S4, introducing adhesive layer thickness on-line monitoring and feedback correction, and S5, completing stepped solidification and stress-free release. The controllable clamping method for the double-sided mirror adhesive layer of the adhesive-sandwiched double-sided mirror realizes closed-loop control of the adhesive layer thickness within the mu m level range by fusing laser interference ranging, fiber bragg grating on-line monitoring and dynamic pressure feedback mechanisms, has thickness uniformity superior to a preset uniformity threshold value, is remarkably superior to the control level of the traditional rigid clamping process, and effectively inhibits wave front distortion and optical performance reduction caused by uneven thickness.

Inventors

Zhao Liancai
YANG KAI
LI YUEGUANG

Assignees

青岛海森玻璃有限公司

Dates

Publication Date: 20260512
Application Date: 20260319

Claims (10)

1. The controllable clamping method for the adhesive layer of the double-sided mirror is characterized by comprising the following steps of: S1, constructing a symmetrical adjustable press-fitting clamping mechanism, wherein clamping assemblies consisting of a flexible pressure head, a pressure servo unit and a displacement feedback module are respectively arranged at the clamping ends of an upper lens and a lower lens, the contact surface of the flexible pressure head and the lens adopts a polytetrafluoroethylene coating structure, the pressure servo unit is used for adjusting the pressure applied to the surface of the lens in real time through closed-loop control, and the displacement feedback module is used for monitoring the micro-displacement change of the lens in the clamping process; s2, presetting and initial positioning of the thickness of the adhesive layer are implemented, after the upper surface of the lower lens is uniformly coated with optical colloid, the upper lens is preliminarily covered above the adhesive layer in a parallel gesture, non-contact measurement is carried out on the distance between the upper lens and the lower lens by using a laser interference ranging device, an actual measurement value is compared with a preset target value of the thickness of the adhesive layer, and if the deviation is larger than a preset threshold value, a fine adjustment mechanism is started to correct the gesture; s3, executing dynamic pressure regulation and glue layer leveling, synchronously starting a pressure servo unit of the upper clamping assembly and the lower clamping assembly at the initial stage of colloid solidification, applying symmetrical load with initial pressure being a preset value, dynamically adjusting an upper pressure difference value and a lower pressure difference value in a specific period based on real-time data output by a displacement feedback module, ensuring that the pressure difference is always smaller than a preset pressure difference threshold value, simultaneously maintaining the total pressure within a preset pressure range, and promoting the colloid to be uniformly leveled under a controlled state; S4, introducing online monitoring and feedback correction of the thickness of the adhesive layer, collecting multi-point thickness data in the adhesive layer in real time through an embedded fiber bragg grating sensor array in the adhesive layer curing process, automatically triggering a local pressure fine adjustment mechanism when detecting that local thickness deviation exceeds a preset threshold value, and applying compensatory pressure to a flexible pressure head in a corresponding area to enable the thickness of the adhesive layer to be restored to a target range; S5, completing step-type curing and stress-free release, gradually reducing the applied pressure to a preset value after the colloid reaches the preset initial curing strength, maintaining the pressure state until the colloid is completely cured, and then linearly unloading the pressure at a preset speed to realize the stress-free release of the lens.
2. The method for controllably clamping a laminated two-sided mirror adhesive layer according to claim 1, wherein the radius of curvature of the contact surface of the flexible indenter matches the curvature of the surface of the lens to be clamped, the polytetrafluoroethylene coating has a predetermined thickness, and the surface roughness is less than a predetermined roughness threshold.
3. The method for controllably clamping a double-sided mirror adhesive layer according to claim 2, wherein the pressure servo unit comprises a high-precision proportional valve, a micro hydraulic cylinder and a pressure sensor, the pressure control resolution of the pressure servo unit reaches a preset resolution, and the response time of the pressure servo unit is smaller than a preset response time threshold.
4. The method for controllably clamping a double-sided mirror adhesive layer according to claim 3, wherein the displacement feedback module is a capacitive displacement sensor, and is mounted on a non-working area of the clamping assembly and the edge of the lens, the measurement range is a preset measurement interval, the resolution is better than a preset resolution threshold, and the sampling frequency is a preset sampling frequency.
5. The controllable clamping method for the adhesive-coated double-sided mirror adhesive layer according to claim 4, wherein the laser interference ranging device is provided with a dual-wavelength light source, and the influence of environmental disturbance is eliminated through a synthetic wavelength interference principle, so that the ranging precision reaches a preset precision threshold.
6. The method for controllably clamping a double-sided mirror adhesive layer according to claim 5, wherein the fiber bragg grating sensor array is distributed in a grid shape along the radial direction and the circumferential direction of the lens, the grid distance is a predetermined distance, each sensing point can independently monitor the thickness change of the local adhesive layer, the strain sensitivity is a preset sensitivity value, and the temperature cross sensitivity is smaller than a preset temperature sensitivity threshold after encapsulation compensation.
7. The method for controllably clamping a double-sided mirror adhesive layer according to claim 6, wherein the local pressure fine adjustment mechanism is implemented by a piezoelectric ceramic driver, the stroke range of the local pressure fine adjustment mechanism is a preset stroke range, the positioning accuracy is better than a preset positioning accuracy threshold, and the pressure compensation action can be completed within a preset response time after a thickness deviation signal is received.
8. The method for controllably clamping a double-sided mirror adhesive layer according to claim 7, wherein the step curing process is divided into three stages, a first stage is maintained at a predetermined pressure for a predetermined period of time to complete initial crosslinking of the adhesive; the second stage is reduced to another preset pressure and kept at the temperature for another preset time period, so that the uniform shrinkage of the colloid is promoted; the third stage is maintained at a lower predetermined pressure for a further predetermined period of time to complete the final cure, with the temperature of each stage being controlled within a preset temperature range.
9. The method for controllably clamping a double-sided mirror adhesive layer according to claim 8, wherein the fine adjustment mechanism comprises a three-degree-of-freedom precision translation stage and a two-dimensional tilt angle adjustment stage, the translation resolution of the fine adjustment mechanism is superior to a preset translation resolution threshold, and the angle adjustment resolution of the fine adjustment mechanism is superior to the preset angle resolution threshold.
10. The method for controllably clamping a laminated double-sided mirror adhesive layer according to claim 9, wherein the method is suitable for manufacturing a laminated double-sided mirror with a predetermined diameter range and an adhesive layer thickness within a predetermined thickness range, and the whole process is automatically controlled.

Description

Controllable clamping method for adhesive layer of adhesive-sandwiched double-sided mirror Technical Field The invention relates to the technical field of glass production, in particular to a controllable clamping method for a double-sided mirror adhesive layer with adhesive. Background With the continuous progress of optical device manufacturing technology, laminated double-sided mirrors are increasingly gaining attention for their key roles in laser systems, imaging equipment and precision measurement instruments. The double-sided adhesive mirror is generally formed by bonding two high-precision optical lenses through an intermediate adhesive layer, and the optical performance of the double-sided adhesive mirror is highly dependent on the uniformity of the thickness of the adhesive layer, the parallelism between the lenses and the stress control in the clamping process. Particularly, under the thickness requirement of the glue layer in the mu m level, any tiny clamping deviation or pressure non-uniformity can cause wave front distortion, reflectivity mismatch or interface scattering, so that the overall performance and reliability of the device are obviously reduced. The gluing process of the laminated double-sided mirror brings stringent requirements on dynamic adaptability and control precision of a clamping system. The existing clamping technology mostly adopts a rigid positioning structure, and micro deformation caused by temperature change, colloid flow or solidification shrinkage cannot be compensated in the colloid solidification process, so that the thickness distribution of the adhesive layer is uneven. Meanwhile, the traditional device lacks real-time sensing capability on the state of the adhesive layer, is difficult to dynamically adjust the applied pressure in the clamping process, and is easy to cause bubble residues, lens deflection or local stress concentration. In addition, the problem that the stress of the upper lens and the lower lens is asymmetric is common, and the thickness deviation of the adhesive layer and the optical surface shape error are further aggravated. Therefore, a clamping method of the double-sided mirror with the adhesive layer capable of realizing accurate regulation and control of the thickness of the adhesive layer, dynamic feedback of clamping pressure and symmetric stress guarantee is needed. Disclosure of Invention The invention aims to provide a controllable clamping method for a double-sided mirror adhesive layer with adhesive therebetween, so as to solve the problems in the background art. In order to achieve the purpose, the invention provides the following technical scheme that the controllable clamping method for the adhesive layer of the adhesive-coated double-sided mirror comprises the following steps: S1, constructing a symmetrical adjustable press-fitting clamping mechanism, wherein clamping assemblies consisting of a flexible pressure head, a pressure servo unit and a displacement feedback module are respectively arranged at the clamping ends of an upper lens and a lower lens, the contact surface of the flexible pressure head and the lens adopts a polytetrafluoroethylene coating structure, the pressure servo unit is used for adjusting the pressure applied to the surface of the lens in real time through closed-loop control, and the displacement feedback module is used for monitoring the micro-displacement change of the lens in the clamping process; s2, presetting and initial positioning of the thickness of the adhesive layer are implemented, after the upper surface of the lower lens is uniformly coated with optical colloid, the upper lens is preliminarily covered above the adhesive layer in a parallel gesture, non-contact measurement is carried out on the distance between the upper lens and the lower lens by using a laser interference ranging device, an actual measurement value is compared with a preset target value of the thickness of the adhesive layer, and if the deviation is larger than a preset threshold value, a fine adjustment mechanism is started to correct the gesture; s3, executing dynamic pressure regulation and glue layer leveling, synchronously starting a pressure servo unit of the upper clamping assembly and the lower clamping assembly at the initial stage of colloid solidification, applying symmetrical load with initial pressure being a preset value, dynamically adjusting an upper pressure difference value and a lower pressure difference value in a specific period based on real-time data output by a displacement feedback module, ensuring that the pressure difference is always smaller than a preset pressure difference threshold value, simultaneously maintaining the total pressure within a preset pressure range, and promoting the colloid to be uniformly leveled under a controlled state; S4, introducing online monitoring and feedback correction of the thickness of the adhesive layer, collecting multi-point thickness data in the adhesive lay