Plano-Concave lenses are usually made of glass (such as BK7, fused quartz) or crystal materials (such as CaF₂). The advantages of using an optical ultrasonic cleaner to clean plano-concave lenses are as follows.

First, let's understand the advantages of the VGT-1509FH optical ultrasonic cleaner model from Vegute:

High-efficiency cleaning: The ultrasonic cavitation effect can reach the concave surfaces, edges and other hard-to-reach areas of the lens, removing fingerprints, grease, dust and other contaminants, and avoiding scratches caused by manual wiping.

Compatible with multiple solvents: Supports neutral cleaning agents, alcohol, deionized water, etc. Appropriate solvents can be selected based on the lens material (such as glass, resin) to avoid corrosion or swelling.

Temperature control: The heating function can enhance the activity of the cleaning agent, but it should be noted that the temperature does not exceed the tolerance range of the lens or coating (usually < 50℃).

Uniformity: The cleaning effect on concave parts is better than that of manual wiping.

Batch processing: Clean multiple lenses at once to enhance efficiency and ensure consistency.

Secondly, understand the structure of the VGT-1509FH optical ultrasonic cleaning machine of Vigot model:

one Ultrasonic generator and transducer system

1. Ultrasonic generator

Frequency range: 40KHZ-120KHZ (adjustable), high frequency (80KHZ-120KHZ) is suitable for precision optical components (such as plano-concave lenses), and low frequency (40KHZ-60KHZ) is suitable for heavy contamination cleaning.

Power adjustment: 50W-300W (adjustable), suitable for different cleaning requirements and avoiding damage to the coating due to excessive power.

Multi-band switching: Some high-end models support dual-band or sweep mode to reduce the standing wave effect and improve the uniformity of cleaning.

2. Ultrasonic transducer

Type: Piezoelectric ceramic transducer (PZT), featuring high energy conversion efficiency (≥95%).

Layout method

Uniform distribution at the bottom: Ensure uniform energy at the bottom of the cleaning tank, suitable for planar side cleaning of plano-concave lenses.

Lateral auxiliary transducer (optional) : Enhances the cavitation effect in concave areas and avoids cleaning dead corners.

Sealing process: Epoxy resin potting is adopted, which is waterproof and anti-corrosive, and is not prone to aging even after long-term use.

two Cleaning tank and cavity structure:

1. Tank material:

Main material: 304/316 stainless steel (resistant to acids, alkalis and organic solvents).

Optional coatings

Teflon (PTFE) coating: Prevents metal ion contamination and is suitable for high-purity optical cleaning.

Quartz glass inner liner: Completely free of metal contact, suitable for ultra-precision optical components.

2. Tank structure

Sunken design: The transducer is directly welded to the bottom of the tank, resulting in higher energy transmission efficiency.

Anti-overflow design: The slot opening is raised to prevent the cleaning solution from splashing.

Drainage system: Bottom quick drain valve, facilitating the rapid replacement of cleaning agents.

3. Heating system

Heating method: Stainless steel heating tube (power 500W-1000W).

Temperature control range: Room temperature -80℃ (accuracy ±1℃), constant temperature cleaning can be set.

Overheat protection: Dual-channel temperature sensors, automatic power-off in case of over-temperature.

4. Lens fixation and bearing system:

Special fixture design

Material: Nylon (PA), polypropylene (PP) or Teflon. Avoid scratching the lens.

Structure

V-shaped groove bracket: Suitable for fixing the curved surface of plano-concave lenses to prevent sliding.

Hollowed-out basket frame: Ensures ultrasonic penetration and unobstructed cleaning.

Customizable: Supports non-standard fixtures and is compatible with lenses of different sizes.

Rotating mechanism (optional) :

Rotational speed: 5-20 RPM (adjustable), ensuring uniform contact between the concave surface and the cleaning solution.

Drive mode: Stepper motor + reducer, smooth operation without vibration.

5. Filtration and Circulation System:

Solvent filtration

Filtration accuracy: 5μm-10μm stainless steel filter screen, intercepting particulate contaminants.

Circulating pump: Magnetic drive pump (no metal contact), flow rate 5-10L/min.

Rinsing system

Deionized water (DI water) rinsing tank: Resistivity ≥15MΩ·cm, reducing water stain residue.

Spray rinsing (optional) : A high-pressure nozzle is used to rinse off the residual cleaning agent on the surface of the lens.

6. Drying System:

Hot air drying

Temperature: 40℃-60℃ (adjustable), to prevent high temperature from damaging the resin lens.

Wind speed: Low turbulence design to prevent lens displacement.

Vacuum drying

Vacuum degree: -0.08 to -0.1MPa, rapidly evaporating residual solvents.

Anti-fogging design: Prevents condensation of water vapor on the lens surface.

7. Control System:

Human-computer interaction interface

Touch screen: 7-inch color screen, capable of storing multiple sets of cleaning programs.

Preset mode: For plano-concave lenses, dedicated parameters can be set (such as 80kHz, 3 minutes, 40℃).

Safety protection

Liquid level detection: Automatic shutdown to prevent dry burning.

Leakage protection: grounding + leakage circuit breaker (30mA).

Door lock interlock: The ultrasonic wave is automatically paused when the cover is opened to ensure operational safety.

8. Auxiliary structure

Casing and bracket

Shell material: ABS engineering plastic/stainless steel, anti-corrosion.

Shock-absorbing foot pads: Reduce the vibration of ultrasonic waves transmitted to the countertop.

Pipelines and interfaces

Inlet/Outlet: Quick-connect interface for easy connection to the DI water system.

Exhaust hole: To prevent excessive air pressure inside the tank.

9. Special optimization for plano-concave lenses:

Concave surface cleaning enhancement: Lateral transducer + rotating mechanism to ensure the cleanliness of the concave surface.

Anti-shock design: Flexible fixture + shock-absorbing bracket to prevent lens collision.

Low-residue rinsing: DI water + spray to reduce residual water stains after drying.