Film coating method of optical filter
CN119615074APending Publication Date: 2025-03-14TRULY OPTO ELECTRONICS
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Patent Information
- Application Number
- CN202411646945.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-03-14
AI Technical Summary
Technical Problem
During the coating process of existing infrared cut-off filters, high temperatures lead to an increase in product discharge time, reducing production efficiency.
Method used
The three-plated coating process is adopted to gradually improve the crystallinity and reflective haze of the film by adjusting the temperature and vacuum, thereby achieving a slow temperature drop and improving production efficiency.
Benefits of technology
By increasing the crystallinity and reflective haze of the film, the visibility of microscopic dust points can be masked, the temperature drop is achieved, the product is discharged for a shorter time and the production efficiency is improved.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a coating method of an optical filter, which mainly comprises the following steps: (1) selecting a glass substrate as a base material, then placing the base material in a vacuum cavity, carrying out plasma cleaning on the surface of the base material, and then coating a first layer of IR (Infrared Radiation) film on the surface of the base material by adopting a vacuum coating machine; (2) in a vacuum cavity, plating a second IR film on the surface of the base material plated with the first IR film by adopting a vacuum coating machine; and (3) in the vacuum cavity, plating a third layer of IR film on the surface of the base material plated with the second layer of IR film by adopting the vacuum coating machine. According to the method, the conception is reasonable, the operation process is simple, the crystallinity of the microstructure of the film can be increased through the three coating processes in sequence, so that the reflection haze is improved, the visibility of some microscopic dust spots is further covered, the temperature is slowly reduced finally, the expected operable problem is solved, and the actual production efficiency is improved.
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