Quartz glass, as a high-quality optical material, has excellent optical properties and chemical stability, and is widely used in optical systems, lasers, communication equipment, and other fields. Manufacturing high-precision optical components, such as quartz glass lenses, requires precise processing, especially the polishing process.

1、 Preparation before polishing

clean:

Before polishing, it is necessary to thoroughly clean the quartz glass lens to remove oil stains, impurities, and dust. You can use detergent and water for cleaning, and then rinse with clean water.

dry:

After cleaning, dry the quartz glass lens dry for the next polishing operation.

Sandblasting:

Sandblasting the surface of quartz glass lenses using materials such as diamond sand or glass sand to remove scratches and burrs, while making the surface rougher, is beneficial for the next step of polishing. During sandblasting treatment, it is necessary to control the selection and dosage of sandblasting materials to avoid damage to the surface of the lens.

Degreasing:

Before polishing, clean the surface of quartz glass lenses with organic solvents to remove stains and residues left by sandblasting.

2、 Polishing process

Rough polishing:

Abrasive selection: Rough polishing usually uses diamond grinding wheels or fused alumina sand, with a particle size between 60 and 120 mesh.

Polishing method: A surface grinder or milling machine can be used for rough grinding to improve production efficiency. The linear speed of the grinding disc is generally controlled at 12-20 meters per second.

Attention: When rough polishing, control the grinding pressure, abrasive concentration, and feed speed to avoid causing excessive damage to the surface of the lens.

Fine grinding:

Abrasive selection: During the fine grinding stage, finer abrasives such as diamond powder or alumina particles are used, typically in the micrometer range.

Polishing method: carried out on a smaller diameter flat disc grinder or multi axis lens grinder, with a grinding disc speed of 12 meters per second or above. The lens should move in an elliptical shape on the grinding disc and be rotated 180 ° frequently to ensure uniform grinding.

Attention: During fine grinding, it is necessary to control the relative speed of the grinding disc, grinding pressure, and abrasive suspension concentration to obtain good surface quality.

Fine polishing:

Abrasive selection: Fine polishing uses finer abrasive particles, such as colloidal silica, to achieve higher surface smoothness.

Polishing method: carried out on a flat swinging fine grinder, or using a single-layer woolen polishing disc. When polishing, apply polishing glue (such as asphalt, rosin mixture) onto the polishing disc, and then place the lens on it for grinding and polishing.

Attention: During precision polishing, it is necessary to strictly control the polishing time, polishing pressure, and concentration of polishing solution to avoid scratches and pitting. At the same time, it is necessary to maintain a clean working environment to prevent impurities and dust from damaging the surface of the lens.

Polishing mold production and aperture modification:

For quartz glass lenses with complex shapes, it is necessary to make polishing molds and modify the aperture as needed. The production of polishing molds should be precise to ensure the geometric shape and surface quality of the lenses.

3、 Polishing treatment

clean:

After polishing, it is necessary to clean the surface of the quartz glass lens again to remove residual abrasives and stains. Deionized water or alcohol can be used for cleaning.

Check:

After cleaning, inspect the quartz glass lens to ensure that the surface is flawless, smooth, and meets the required smoothness and geometric dimensions.

Quality acceptance:

Conduct quality inspection and acceptance to ensure that quartz glass lenses meet the usage standards and requirements.

4、 Polishing techniques and precautions

Abrasive particle size selection:

Choose the appropriate abrasive particle size according to the different polishing stages. Coarse polishing uses coarser abrasives, while fine grinding and precision polishing use finer abrasives.

Polishing solution concentration:

The concentration of polishing solution has a significant impact on the quality of polishing. Adjust the concentration of polishing solution according to the polishing stage and abrasive type.

Polishing time control:

The polishing time should be moderate, as being too long or too short can affect the polishing quality. According to the material and polishing requirements of the lens, the polishing time should be reasonably controlled.

Keep the environment clean:

During the polishing process, it is necessary to maintain a clean working environment to prevent impurities and dust from damaging the surface of the lens.

Polishing pressure control:

When polishing, the polishing pressure should be controlled to avoid being too high or too low, in order to ensure the quality and efficiency of polishing.

Polishing equipment selection:

Choose advanced polishing equipment and tools, such as surface grinders, milling machines, grinders, etc., to improve polishing quality and efficiency.

Technical proficiency:

Polishing technology requires proficient operational skills and accumulated experience. Operators need to continuously learn and practice to improve their polishing technology level.

The polishing techniques for quartz glass lenses involve multiple aspects, including preparation before polishing, polishing process, post-treatment after polishing, as well as polishing techniques and precautions. By mastering these techniques and methods, high-quality quartz glass lenses can be produced to meet the needs of various optical systems.

Luverre Quartz is a manufacturer focusing on producing various quartz lenses, we can produce customized quartz lenses in different sizes and shapes, such as square, round, oval and other special shaped designs according to customer's requirements. The processing includes cutting, bending, welding, etc., and there are different colors available, such as transparent quartz lenses, opaque quartz lenses, milky quartz lenses and so on.