In the fields of optical instruments, photographic equipment, aerospace, etc., large-size optical glass is increasingly used.
However, how to polish this kind of high-precision and high-demand glass has always been a technical problem that has plagued the industry. Today, we will unveil the mystery of polishing large-size optical glass!
Characteristics of large-size optical glass.
This kind of glass is not only large in size, but also has extremely high surface quality requirements. Any tiny flaws may affect the propagation of light and imaging effects.
Therefore, the polishing process needs to be very delicate and rigorous to ensure that the flatness, finish and optical performance of the glass surface are in the best state.
The polishing process of large-size optical glass can be divided into three stages.
1. Rough grinding: In the rough grinding stage, we use abrasives with larger particle sizes to perform preliminary grinding on the glass surface to remove the rough parts and irregular protrusions on the surface.
The main purpose of this stage is to lay a good foundation for subsequent fine grinding and polishing.
2. Fine grinding: In this stage, we use abrasives with finer grains to further polish and trim the glass surface.
By constantly adjusting the grain size and grinding force of the abrasive, we can gradually make the glass surface smooth and flat, and fully prepare for polishing.
3. Polishing: In the product polishing stage, we no longer use abrasives, but special polishing tools and polishing fluids. The chemical components in the polishing fluid can react chemically with the glass surface to make the surface smoother and more delicate.
At the same time, the fine operation of the polishing tools can further eliminate minor surface flaws and improve the optical properties of the glass.
Polishing of large-size optical glass requires special attention:
1. Temperature control
During the polishing process, the surface of the glass will generate heat due to continuous friction. If the temperature is too high, it may cause deformation or stress of the glass.
We need to ensure the stability of the glass during the polishing process by controlling the temperature of the polishing area (cooling down).
2. Environmental control
During the polishing operation, the operating area needs to be kept clean and dust-free to avoid dust and other impurities from contaminating the glass surface.
At the same time, the temperature and humidity in the workshop also need to be controlled within a certain range to ensure the stability and consistency of the polishing effect.
3. Equipment selection
The polishing of large-size optical glass requires more professional polishing equipment and tools. These equipment must have the characteristics of high precision, high stability and high reliability to smoothly achieve the required polishing effect.
4. Technical training
Polishing is a very technical job. Ordinary people often cannot meet the delivery standards and require experienced technicians to operate. Therefore, companies need to continuously conduct systematic training and skill improvement for polishing personnel to improve polishing quality and efficiency.
Polishing is a key link in the glass manufacturing process. It not only affects the quality and performance of the product, but also the quality of the output product will directly affect the competitiveness and market position of the sales unit.
Through scientific polishing technology and superb technical means, we can make large-size optical glass glow with clearer and brighter brilliance, bringing a better visual experience to our life and work.