I. Common Components of fixed-focus Filter Assemblies:

Filter body：

Narrowband filters, broadband filters, infrared cut-off filters, etc., are usually coated with precision optical films.

Optical substrate：

Glass (such as BK7, fused quartz) or crystal materials (such as calcium fluoride) may have their surfaces polished or coated.

Fixed structure：

Metal or plastic frames, adhesives (such as UV-cured adhesives), sealing rings, etc.

Auxiliary components:

Anti-reflection film, reflector, polarizer (some components will be integrated).

Second, the cleaning solution of the Weigot VGT-1409FH optical ultrasonic cleaning machine has reasonable advantages:

Applicable scenarios: It can be used for the non-coated parts of filter assemblies and impact-resistant materials. It can efficiently remove stubborn contaminants such as particles and oils.

Coating and precision surface cleaning solution: Use low-pressure spray + neutral solvent (such as ethanol, acetone) or ultrapure water + surfactant manual cleaning.

Precautions for coating and precision surface cleaning:

1.Confirm the material of the filter and the characteristics of the coating (Weigot Ultrasonic Company can provide ultrasonic resistance parameters).

2. Avoid using strong acid/strong alkali cleaning agents to prevent corrosion of the coating or equipment.

Cleaning process:

1. Pre-cleaning:

Use dust-free cotton swabs and compressed air to remove large particles.

2. Main cleaning:

Non-coated components: Ultrasonic cleaning (40kHz, neutral solution, 2 minutes).

Coated components: Static immersion or low-pressure spray.

3. Rinsing and drying

After rinsing with ultrapure water, dry with nitrogen or dry at a constant temperature (<60℃).

Multi-tank segmented cleaning design：

1.Advantages: It is usually equipped with 3 to 5 tanks (pre-wash, main ultrasonic, rinse, slow pull drying, etc.) to achieve physical isolation of the cleaning process and avoid cross-contamination.

2. Effect: Ensure the independence of different cleaning stages (decontamination, rinsing, and drying), enhance cleaning efficiency, and is particularly suitable for high-precision optical components.

High-precision ultrasonic system：

1.High-frequency ultrasonic waves (40KHZ-120KHZ) : Suitable for optical components of different sizes, high frequency can reduce the risk of cavitation corrosion and protect precise surfaces.

2. Adjustable power: It can be flexibly adjusted according to the type of dirt (such as grease, polishing powder) to avoid damaging the coating or fragile materials.

Special fixtures and carriers:

1. Non-contact fixed frame: It avoids mechanical friction during the cleaning process and ensures that the components are in full contact with the cleaning solution.

2. Material compatibility: Teflon or PP material fixtures are adopted, which are corrosion-resistant and do not cause secondary pollution.

Temperature control and filtration system:

1. Heating and constant temperature (30℃-60℃) : Enhance the activity of the cleaning agent and accelerate the dissolution of stubborn stains.

2. Circulating filtration: Equipped with multi-stage precision filters (such as 0.1μm filter elements), it removes impurities in real time to keep the cleaning solution pure.

Slow pull drying technology:

1. Low surface tension rinse: Use deionized water or alcohol to reduce water marks.

2. Vertical slow pulling (adjustable speed) : By slowly lifting the workpiece, the liquid flows off evenly to prevent dry residue.

The core advantages of the Weigute VGT-1409FH optical ultrasonic cleaning machine lie in its specialized division of labor design (multi-tank coordination), precise process control (ultrasonic parameters, drying technology), and high compatibility (material/cleaning agent compatibility), which can meet the strict requirements of the optical industry for cleanliness, safety and efficiency. This type of cleaning equipment is particularly suitable for scenarios where nano-scale particles need to be removed or coatings need to be protected.