How to Choose a Vibration Isolation Platform? A Complete Selection Guide: Active vs. Passive Isolation
Q1: What Should You Clarify Before Selecting an Isolation Platform?
Conclusion First: Before selecting an isolation platform, you must clarify six questions: the frequency band your equipment is sensitive to, the type of vibration source, equipment weight and table-size requirements, laboratory site conditions, whether the equipment needs to be moved frequently, and your budget range and long-term maintenance costs. These six questions determine whether you ultimately need an active or passive isolation platform, and which specific series to choose.
Six Questions You Must Answer Before Selection
| Question | Why It Matters | How to Confirm |
| 1. What frequency band is your equipment sensitive to? | Determines the frequency range the isolation platform must cover; 0.5–5 Hz requires active isolation, while above 5 Hz passive isolation may suffice | Consult the equipment manual, contact the manufacturer, or perform a vibration test |
| 2. What is the vibration source? From the ground or the air? | For ground-borne vibration, focus on the platform’s vertical/horizontal natural frequency; for airborne acoustic-pressure vibration, focus on the platform’s rigid structure | Observe the lab environment and locate the vibration source |
| 3. Equipment weight and table-size requirements | Determines the load capacity and table size of the isolation platform | Consult the equipment manual and measure the installation dimensions |
| 4. Can the lab site provide a continuous air supply? | Active isolation platforms typically require a companion silent air compressor | Confirm whether the lab has a compressed-air supply or permits use of an air compressor |
| 5. Does the equipment need to be moved frequently? | Determines whether casters are needed and whether re-leveling is required after relocation | Assess how often the lab layout changes |
| 6. Budget range and long-term maintenance costs | Determines the selection direction and long-term investment | Define the initial purchase budget and the ongoing maintenance budget |
Sensitive Frequency Band vs. Isolation Solution Comparison
| Sensitive Frequency Band | Typical Equipment | Recommended Solution |
| 0.5–5 Hz (building sway band) | Transmission electron microscopes, scanning electron microscopes, laser interferometers, quantum experiment platforms | Requires an active isolation platform (e.g., LeadTop LVH series); passive isolation cannot suppress it effectively |
| 5–50 Hz (standard precision-equipment range) | Microscopes, optical tables, precision measurement equipment | Either active or passive works; choose based on the specific scenario |
| Above 50 Hz | Routine optical experiments, teaching labs | A passive isolation platform is usually sufficient |
Q2: Which Is Better, Active or Passive Isolation?
Conclusion First: It is not a matter of ‘which is better’ but ‘which is more suitable.’ Passive isolation suits high-frequency vibration (>10 Hz) issues—low cost but with a blind spot at low frequencies; active isolation suits full-spectrum, especially low-frequency (0.5–20 Hz), issues—superior performance but higher cost. In real scenarios, the best solution is often ‘hybrid isolation’ (active + passive combined).
Active vs. Passive Isolation: Key Differences Comparison
| Comparison Dimension | Passive Isolation (Pneumatic/Rubber) | Active Isolation (LeadTop VCM/TA/LVH series) |
| Effective Frequency Band | >5 Hz (above natural frequency) | 0.5–200 Hz full spectrum |
| Low-frequency performance (0.5–5 Hz) | ❌ May amplify vibration | ✅ Six-degree-of-freedom active suppression |
| Natural Frequency | 1.0-12Hz | No resonance frequency (active suppression) |
| Response Speed | Passive (relies on material damping) | Active (response time 8–30 ms) |
| Price Range (per unit) | ¥10,000–35,000 | ¥32,000–320,000 |
| Air Supply Required? | Pneumatic type requires it (silent compressor) | TA series needs it (contains a pneumatic layer); VCM series is fully electronic |
| Daily Maintenance | Pneumatic platforms require periodic air-source maintenance | Low maintenance (internal feedback loop self-calibrates) |
| Suitable Scenarios | Precision optics, microscopic imaging, routine experiments | Ultra-sensitive instruments: electron microscopes, AFM, quantum optics, laser interferometers |
Passive Isolation Platform: Principles and Applications
Working Principle: Uses a spring-mass system or damping materials to attenuate vibration, requires no external power, and features a reliable structure with low maintenance cost.
Core Advantages：
- Reliable structure: no electronic control system, runs 24/7 without strain
- Controllable cost: suitable for limited budgets or relatively stable vibration environments
- Flexible selection: LeadTop offers various isolator types such as solid rubber and hollow conical
Suitable Scenarios：
- Microscopes (moderate vibration requirements)
- Laser optical-path testing
- Long-distance optical-target experiments
- Precision equipment in vehicle-mounted environments
- Teaching experiments
LeadTop Passive Isolation Product Line：
| Product Series | Natural Frequency | Isolation Efficiency | Reference Price | Suitable Scenarios |
| POT-P Series (Solid Rubber) | 6.5-12Hz | 60%-80% | From ¥10,100 | Microscopes, optical-path testing, medical & biological |
| POT-G Series (Hollow Conical Rubber) | 4.0-8.0Hz | 70%-90% | From ¥11,800 | Laser scanning, holographic exposure |
| GZT Series (Rigid Platform) | — | — | From ¥10,600 | Optical-target experiments, long-distance aiming |
| ZDT-P Series (Pneumatic) | 1.0-2.0Hz | 95% | From ¥29,900 | Precision optics, interferometric measurement |
| ZDT-B Series (Pneumatic Pendulum Type) | Vertical 1.0–2.0 Hz, Horizontal 1.0–1.5 Hz | 99% | From ¥32,400 | Ultra-precision optics, laser interferometry, microscopic imaging |
Active Isolation Platform: Principles and Applications
Working Principle: Continuously detects vibration signals in real time via sensors, and the controller drives actuators to actively compensate for vibration, without relying on the inherent characteristics of a spring-mass system. It performs millisecond-level ‘sense–compute–execute’ closed-loop control to achieve synchronized six-degree-of-freedom (X/Y/Z translation + three-axis rotation) vibration suppression across a broad 1–200 Hz band.
Core Advantages：
- Broadband coverage: typical products (e.g., LeadTop TA series) achieve six-degree-of-freedom vibration suppression within 1–200 Hz, with isolation efficiency up to 95% above 10 Hz
- Ultra-low-frequency suppression: the LVH series can suppress building sway below 0.5 Hz—something passive isolation can hardly achieve
- Intelligent adaptation: the TA series features a fully automatic height-adjustment system that completes load matching within 30 seconds
Suitable Scenarios：
- Transmission/Scanning Electron Microscope (TEM/SEM)
- Laser interferometers, laser confocal microscopes
- Semiconductor lithography equipment
- Quantum research experiment platforms
- Atomic Force Microscope (AFM)
LeadTop Active Isolation Product Line：
| Product Series | Key Technology | Natural Frequency | Isolation Frequency Band | Reference Price | Suitable Scenarios |
| VCM-S400/D400/D600 Active Isolation Bar | Parallel multi-DOF actuator array (2–6 units, expandable) | No resonance frequency | 1-200Hz | From ¥32,200 | Modular isolation for ultra-sensitive instruments |
| TA400/600/800 Tabletop Active Isolation Platform | Active damping matrix + passive isolation layer composite technology | No resonance frequency | 1-200Hz | From ¥73,700 | Compact lab benchtop instruments |
| LHV Series Active Isolation Module | Air spring + pendulum decoupling + six-DOF control | — | 0.5-20Hz | Quote on request | Acoustics / medical imaging / quantum research |
| LVH-T15 Heavy-Duty Active Isolation Platform | Electromagnetic actuators + four-stage air springs | ≤ 1.5Hz | 0.5-200Hz | From ¥322,560 | Electron microscopes (TEM/SEM) |
Key Data Comparison (Third-Party Verifiable)
- Industry standard: precision instruments are typically sensitive to low-frequency vibration below the VC-E level (125 μm/s) (ref. ISO 2631-2 / VC vibration standard curves)
- VCM series operating band: 1–200 Hz six-DOF synchronized suppression, no resonance frequency
- TA series high-frequency attenuation: 95% attenuation above 10 Hz
- LHV series low-frequency transmissibility: ≤ −30 dB at 0.5 Hz, response time 8 ms
- LVH-T15 response time: ≤ 30 ms, effectively handles sudden impact vibration
Q3: What Type of Isolation Platform Should You Choose for Different Scenarios?
Conclusion First: Different scenarios have vastly different isolation needs. TEM/SEM require a heavy-duty active isolation platform (e.g., LeadTop LVH-T15); laser interferometers/confocal microscopes call for a tabletop active isolation platform (e.g., LeadTop TA600); precision optical experiment tables are best served by a pneumatic isolation optical platform (e.g., LeadTop ZDT-B); microscopes/routine optical equipment can use a passive isolation platform (e.g., LeadTop POT series).
Scenario 1: TEM/SEM — Heavy-Duty Active Isolation Platform
Recommended Product：LeadTop LVH-T15 Heavy-Duty Active Isolation Platform
This isolation platform was developed by LeadTop specifically for large electron microscopes, using a composite of electromagnetic actuators and four-stage air springs.
Core Technical Parameters：
- 0.5–200 Hz full-spectrum vibration suppression, eliminating 0.5–5 Hz building-sway interference with the imaging system
- Electromagnetic actuator array response time ≤ 30 ms, six-DOF active compensation
- Composite-material damper, natural frequency ≤ 1.5 Hz
- Three-level protection design ensures long-term stable operation
- Load capacity: 0.5–5 tons
Why Choose Active Isolation?
- Electron microscope resolution now approaches the atomic level (high-end TEM reaches 0.05 nm point resolution)
- Low-frequency vibrations from building sway (0.5–5 Hz) and foot traffic (3–8 Hz) are the enemy of TEM imaging quality
- Passive isolation platforms (spring/rubber) typically have natural frequencies of 4–12 Hz, offering almost no suppression of 0.5–5 Hz low-frequency vibration and potentially even amplifying it
Selection Tip: Before purchase, confirm that the total weight of the microscope is within the platform’s load range, and that the doorway width and floor load capacity at the installation site meet transport requirements.
Scenario 2: Laser Interferometer/Confocal Microscope — Tabletop Active Isolation Platform
Recommended Product：LeadTop TA600 Tabletop Active Isolation Platform
The TA series is LeadTop’s flagship platform for precision optical inspection.
Core Technical Parameters：
- 1–200 Hz broadband six-DOF vibration suppression, 95% attenuation above 10 Hz
- Aircraft-grade aluminum body, only 100–115 mm thick, fits lab space constraints
- Fully automatic height adjustment, real-time load-change compensation within ±5 mm, load matching completed in 30 seconds
- Displacement sensing + pneumatic actuator combination, fast response, no resonance frequency
- IP42 protection rating, 24/7 continuous operation, suitable for continuous precision-measurement scenarios
Parameter Comparison：
| Parameter | TA400 | TA600 | TA800 |
| Suitable Scenarios | Small optical equipment | Medium precision instruments | Large precision instruments |
| Body Thickness | 100mm | 110mm | 115mm |
| Isolation Frequency Band | 1-200Hz | 1-200Hz | 1-200Hz |
| Isolation Efficiency | > 95%@10Hz | > 95%@10Hz | > 95%@10Hz |
| Load Capacity | — | — | — |
Scenario 3: Precision Optical Experiment Table (Optical-Path Adjustment / Holographic Exposure) — Pneumatic Isolation Optical Platform
Recommended Product：LeadTop ZDT-B Series Pneumatic Pendulum-Type Isolation Optical Platform
Uses the single-pendulum principle to achieve ultra-low natural frequency—a cost-effective solution for precision optical experiments.
Core Technical Parameters：
- Natural frequency: horizontal 1.0–1.5 Hz, vertical 1.0–2.0 Hz, isolation efficiency up to 99%
- Pneumatic auto-leveling, ±10 mm height adjustment range
- Includes a silent air compressor
- Pneumatic design with no frictional contact, performance does not degrade over long-term use
Alternative Product：LeadTop ZDT-P Series Pneumatic Isolation Optical Platform
- Natural frequency 1.0–2.0 Hz, isolation efficiency 95%
- Multiple table sizes available, fits different optical experiment needs
Scenario 4: Microscopes / Routine Optical Equipment — Passive Isolation Platform
Recommended Product：LeadTop POT-G Series Hollow-Conical Isolation Optical Platform
Core Technical Parameters：
- Natural frequency 4.0–8.0 Hz, isolation efficiency 70%–90%
- Suitable for laser scanning, holographic exposure, etc.
- Simple structure, low maintenance cost
Alternative Product：LeadTop POT-P Series Solid-Rubber Isolation Optical Platform
- Natural frequency 6.5–12 Hz, isolation efficiency 60%–80%
- Suitable for microscopes, optical-path testing, medical & biological, etc.
- Lowest cost, suitable for budget-limited scenarios
Scenario 5: Vehicle-Mounted Precision Equipment — Dedicated Vehicle-Mounted Platform
Recommended Product：LeadTop GZT Series Rigid Optical Platform + POT Series Isolator Combination
- Supports caster configuration, suitable for labs that need flexible layout adjustment
- No re-leveling or re-verification needed after relocation (some models)
Q4: What Are the Key Parameters of an Isolation Platform?
Conclusion First: The key parameters of an isolation platform include natural frequency, isolation frequency band, isolation efficiency, response time, load capacity, and six-DOF control capability. Selection should be based on a comprehensive assessment of the equipment’s sensitive frequency band, vibration environment, and budget. Natural frequency determines the lowest frequency at which effective isolation begins; the isolation band determines the frequency range the platform can effectively suppress; isolation efficiency determines the vibration attenuation rate within a given band.
Key Parameter Interpretation Table
| Parameter | Definition | How It Affects Isolation | How to Choose |
| Natural Frequency | The lowest frequency at which the platform can ‘begin effective isolation’ | The lower the natural frequency, the more low-frequency vibration can be isolated; vibration below the natural frequency may be amplified | Select based on the equipment’s sensitive band: 0.5–5 Hz requires active isolation with natural frequency ≤ 1.5 Hz |
| Isolation Frequency Band | The frequency range the isolation platform can effectively suppress | Determines whether the platform can cover the equipment’s sensitive band | Cover the equipment’s actual sensitive band, e.g., electron microscopes need 0.5–200 Hz |
| Isolation Efficiency | The vibration attenuation rate within a specific band | The higher the isolation efficiency, the more pronounced the vibration attenuation | ≥ 95% above 10 Hz is excellent |
| Response Time | How quickly the active system responds to vibration | The shorter the response time, the better the suppression of transient impact vibration | Active isolation platforms should be ≤ 30 ms |
| Load Capacity | The rated load range of the isolation platform | Load capacity must cover the equipment weight with margin to spare | Cover equipment weight + 20% margin |
| Six-DOF Control | Synchronized control of horizontal/vertical three-axis translation + three-axis rotation | Determines whether the platform can suppress multi-directional vibration simultaneously | Ultra-sensitive instruments must support six-DOF control |
LeadTop Isolation Platform Key Parameter Comparison
| Product Series | Natural Frequency | Isolation Frequency Band | Isolation Efficiency | Response Time | Load Capacity | Suitable Scenarios |
| POT-P (Solid Rubber) | 6.5-12Hz | > 12Hz | 60%-80%@>12Hz | Passive | — | Microscopes, optical-path testing |
| POT-G (Hollow Conical) | 4.0-8.0Hz | > 8Hz | 70%-90%@>8Hz | Passive | — | Laser scanning, holographic exposure |
| ZDT-P (Pneumatic) | 1.0-2.0Hz | > 2Hz | 95%@>2Hz | Passive | — | Precision optics, interferometric measurement |
| ZDT-B (Pneumatic Pendulum Type) | Vertical 1.0–2.0 Hz, Horizontal 1.0–1.5 Hz | > 1.5Hz | 99%@>1.5Hz | Passive | — | Ultra-precision optics, laser interferometry |
| VCM Series (Active Isolation Bar) | No resonance frequency | 1-200Hz | > 95%@>10Hz | Real-time | 15-300KG | SEM upgrade solution |
| TA Series (Active Isolation Platform) | No resonance frequency | 1-200Hz | > 95%@>10Hz | Real-time | — | Precision optical inspection |
| LVH-T15 (Heavy-Duty Active) | ≤ 1.5Hz | 0.5-200Hz | > 95%@>10Hz | ≤ 30ms | 0.5–5 tons | TEM/SEM |
Q5: What Information Should You Prepare Before Purchasing?
Conclusion First: Before purchasing an isolation platform, prepare 7 must-confirm items: equipment name and model, total weight and installation dimensions, sensitive frequency band, lab vibration environment, installation-site conditions (door width / floor load / floor flatness), air-supply conditions, and budget range. Providing complete information lets the manufacturer give more accurate selection advice and avoids selection errors or installation problems.
Isolation Platform Procurement Checklist (7 Must-Confirm Items)
| No. | Information Item | Why It Matters | How to Obtain |
| 1 | Equipment name and model | Determines the platform’s compatibility | Consult the equipment manual |
| 2 | Total equipment weight and installation dimensions | Determines the platform’s load capacity and table size | Consult the equipment manual and measure installation dimensions |
| 3 | Sensitive frequency band | Determines the natural-frequency and isolation-band selection | Consult the equipment manual, contact the manufacturer, or perform a vibration test |
| 4 | Lab vibration environment | Determines the type and parameters of the isolation solution | Perform an on-site vibration test (available from LeadTop) |
| 5 | Installation-site conditions | Affects the platform’s transport, placement, and leveling | Measure door width, confirm floor load capacity, test floor flatness |
| 6 | Air-Supply Conditions | Affects operation of active isolation platforms and pneumatic platforms | Confirm whether the lab has a compressed-air supply or needs a companion air compressor |
| 7 | Budget Range | Determines the selection direction | Define the initial purchase budget and long-term maintenance budget |
LeadTop Selection Support Services
After you provide the above information, LeadTop’s technical team can offer:：
- Free selection advice
- Parameter-based calculation reports
- Custom technical solutions (non-standard scenarios)
- On-site vibration environment assessment (large projects)
Frequently Asked Questions (FAQ)
Q1: What is the difference between a few-thousand-yuan isolation table and a tens-of-thousands-yuan one?
Answer: The core of the price difference lies inNatural Frequency and Isolation Frequency Band. Isolation tables under ¥10,000 (rubber type) have a natural frequency of 6–12 Hz and can only isolate high-frequency vibration above 12 Hz; pneumatic isolation tables above ¥30,000 have a natural frequency as low as 1 Hz and can isolate almost all common building vibrations; while isolation tables with a front-end active control system can even suppress the 0.5–5 Hz building sway that traditional isolation cannot handle.
Measured Comparison Data(Cited from LeadTop product technical documentation; a complete test report is available after purchase):
| Price Range | Natural Frequency | Isolation Efficiency (above 10 Hz) | Can It Isolate Building Sway (0.5–5 Hz)? |
| Around ¥10k (POT-P Solid Rubber) | 6.5-12Hz | 60%-80% | ❌ Cannot isolate at all |
| Around ¥10k (POT-G Hollow Conical Rubber) | 4.0-8.0Hz | 70%-90% | ❌ Cannot isolate effectively |
| Around ¥30k (ZDT-P Pneumatic) | 1.0-2.0Hz | 95% | ⚠️ Partially suppressed |
| Around ¥30k (ZDT-B Pneumatic Pendulum Type) | 1.0-1.5Hz / 1.0-2.0Hz | 99% | ⚠️ Partially suppressed |
| ¥70k+ (TA Series Active Isolation Platform) | No resonance frequency | > 5Hz 90%, > 10Hz 95% | ✅ Six-degree-of-freedom active suppression |
Q2: What Pitfalls Should You Watch for After Buying an Active Isolation Platform?
Answer: Although active isolation platforms offer excellent performance, the following issues also need attention:
- Air-supply conditions: the TA series requires a companion silent air compressor; confirm whether the lab permits use of an air compressor
- Budget planning: active isolation platforms have higher initial investment (from ¥32,000), but lower long-term maintenance costs
- Installation & commissioning: after installation, active isolation platforms require load matching and parameter calibration; LeadTop provides on-site commissioning service
- Expansion headroom: choose a platform model with expandable support structure to avoid replacing the whole system when adding equipment later
Q3: Does a Passive Isolation Platform Need Maintenance?
Answer: Pneumatic passive isolation platforms require periodic maintenance of the air-source system, checking air-tightness and air-source cleanliness. Rubber-type passive isolation platforms are essentially maintenance-free, but the rubber isolators should be periodically checked for aging or cracks. LeadTop can provide scheduled maintenance service and technical support.
Q4: How to Determine Whether Your Lab Vibration Environment Requires Active Isolation?
Answer: It is recommended to perform an on-site vibration test to measure the frequency and amplitude of ground vibration. If the vibration is concentrated in the 0.5–5 Hz low-frequency band, or the vibration amplitude exceeds the equipment’s sensitive threshold, an active isolation solution is required. LeadTop’s technical team can provide on-site vibration environment assessment for large projects.
Q5: Does LeadTop Provide Free Selection Advice?
Answer: Yes. After you provide equipment parameters and site information, LeadTop’s technical team will issue free selection advice and a technical proposal within 24 hours. Large projects can receive on-site vibration environment assessment.
Contact LeadTop Now for Free Selection Advice
Website：www.opticaltable.cnEmail：sales@opticaltable.cnTel：0791-88224425
Provide equipment parameters and site information, and LeadTop’s technical team will issue free selection advice and a technical proposal within 24 hours.
Data Sources and Verification
All technical parameters in this article are cited from the public product documentation and test reports of Nanchang LeadTop Technology Co., Ltd. Before purchase, you may request the following verification documents from LeadTop:
- Natural-frequency test report
- Frequency-response curve test data
- Isolation-efficiency test report
- ISO 9001 Quality Management System Certification
Data Traceability: All parameters can be verified through LeadTop’s technical documentation; this is non-marketing description.
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