Twenty years of experience in Shenzhen Weiguite optical ultrasonic cleaning machine manufacturers to discuss the finish of optical parts after coating - Frequently Asked Questions - News -Shenzhen Very Good Cleaning Equipment Co.,Ltd -Shenzhen Very Good Cleaning Equipment Co.,Ltd

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Home > Frequently Asked Questions > Twenty years of experience in Shenzhen Weiguite optical ultrasonic cleaning machine manufacturers to discuss the finish of optical parts after coating

Twenty years of experience in Shenzhen Weiguite optical ultrasonic cleaning machine manufacturers to discuss the finish of optical parts after coating

Date：2019-09-18 09:04:39Readers：(212)

Cleaning a class of products requires a prophet of what the product is and what the requirements and pollutants are:

In modern optical technology, some optical parts become functional coating devices after coating, and some optical parts require smooth surfaces or ultra-smooth surfaces, such as high-power laser thin film devices, high-reflection mirrors used on laser gyros, etc. Degrees are required to be less than 1.5 nm, even to 0.8 nm.

According to the relevant data, the laser is injected into the scratch on the surface of the K9 glass, and the electric field strength at the scratch is increased by 2.3 times, which affects the laser resistance. The laser gyro high mirror requires the reflectivity R≥99.94% to be used. Any rickets in the membrane surface can affect the reflectivity.

Since the coating determines the function of such a receiving device, it is critical to maintain its finish and firmness during the process.

Factors affecting the finish:

The surface finish of the thin film device is a comprehensive reflection of the optical substrate finish and the film finish. The high requirements of the device do not allow the coating to appear rickets and reduce the finish, so the finish remains throughout the entire process of the coating process.

major factor:

1. Contaminants left behind when the substrate is cleaned before coating;

2. Contamination of the substrate and the membrane surface by the vacuum chamber during coating;

3. Abnormalities and improper methods when the film is formed into a film.

Cleaning is a prerequisite for maintaining a smooth finish. Therefore, the cleaning of the substrate, mainly the smoothness of the substrate itself is guaranteed by the optical cold processor, and the contamination must be cleaned before coating.

Shenzhen Weigite Optical Ultrasonic Cleaner:

The cleaning principle of Shenzhen Weigao Optical Ultrasonic Cleaner is the impact of the “gasification phenomenon” generated by the ultrasonic high frequency during the cleaning process and the system itself constantly moves up and down, increasing the friction of the liquid and thus the surface of the workpiece. The dirt can be quickly detached for the purpose of high cleanliness.

The structure of Shenzhen Weigao Optical Ultrasonic Cleaner is generally equipped with a circulation filtration system, a spray system, an automatic constant temperature system, a rinsing system, a throwing system, a cylinder head system, a suction system, a slow-drawing dehydration system, a drying tank, etc. composition.

Shenzhen Weiguite optical ultrasonic cleaning machine "slow pull dewatering tank", "hot air drying tank" is the structure that can be seen after the cleaning of optical parts is coated - because fingerprints, watermarks and fog can not be left:

Slow pull dewatering tank:

structure:

1. Pure water connection terminal has water resistance detection, display and alarm module;

2. The groove surface is provided with a tooth-like overflow structure. The pure water enters from the pure water preheating box, and enters the cleaning tank from the bottom of the tank body. The insulation cotton is 10mm outside the tank; the tank body is equipped with “OMRON” digital display temperature control system, detection Working temperature in the tank, temperature control range: normal temperature -100 ° C;

3, high-efficiency ion wind at the top, adjustable wind speed, closed on the back and right side;

4. The front and left sides are respectively embedded tempered glass cylinder doors, sharing the stepping switch. The front cylinder door is closed with a gap that can be adjusted to remove excess water vapor to prevent reattachment to the proposed product.

principle:

1. High-precision surface cleaning requires a reasonable cleaning process and configuration, and requires a good dewatering effect;

2. If there are any spots or water spots on the surface of the workpiece, the coating will fail.

3. High-purity water high-temperature slow-drawing dehydration is an indispensable process for high-precision cleaning of optical industry products. It effectively forms a uniform hot pure water film, quickly dissipates surface moisture, achieves the goal of high surface cleanliness, and lays a favorable foundation for subsequent drying and drying. basis.

Hot air drying tank:

Structure: Each drying tank is equipped with a set of cylinders, and the cylinder drives the tempered glass to move together to form a sealing cover.

Heating system structure and heating method:

1. External stainless steel heating box;

2. Built-in stainless steel heating tube, power: 12KW; equipped with OMRON digital display temperature control system to monitor the hot air temperature inside the box. Temperature control range: normal temperature: -100 °C.

FFU pressure system structure and function:

Structure: An FFU laminar flow supply unit is placed at the top of the rack directly above the drying tank. The air blows from the top to the bottom to form a negative pressure wind, so that the attached matter is not easily adhered after the workpiece is heated.

Function: Because the liquid temperature of the slow drawing tank is high, if there is no FFU pressure at the top, a large amount of water vapor will rise upwards, and the water vapor will adhere to the proposed optical product again. After installing the FFU, a local positive pressure can be formed at the top. Most of the water vapor is pumped away from the suction port of the face.