Product Core Brief
- Model: ZMI-4104
- Brand: ZYGO
- Series: ZMI Displacement Measurement
- Core Function: Processes interferometer light signals to calculate ultra-precise displacement and position.
- Product Type: Displacement Measurement Board
- Key Specs: 0.15 nm Resolution | 4 Axes | 6U VME64x
- Condition: New Surplus / Original
Product Introduction
ZYGO ZMI-4104 is a high-precision displacement measurement board designed for the most demanding metrology applications. This ZYGO module utilizes advanced signal processing to achieve sub-nanometer resolution, making it the core engine for ultra-precision positioning.
Engineered for extreme accuracy, the ZYGO features built-in cyclic error compensation to eliminate inherent nonlinearities. It supports modular expansion, allowing system integrators to scale up to 64 measurement axes within a single VME chassis.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | Displacement Measurement Board |
| Position Resolution | 0.15 nm |
| Axes Per Board | 4 Channels |
| Max Speed | ±2.55 m/s |
| Accuracy (at max speed) | 0.2 nm (σ) |
| Minimum Optical Power | 0.07 µW |
| Board Format | 6U VME64x |
| Cyclic Error Compensation | Yes |
| Compatible Lasers | ZMI 7702, 7714, 7724 |
| Application | Semiconductor / Optics / Aerospace |
Quality Control Process
Metrology boards require absolute precision, so our testing is rigorous. Every ZYGO is mounted in a test chassis and subjected to a simulated interferometer signal injection. We verify the analog-to-digital conversion and phase demodulation are tracking correctly across all four channels. Minimum optical power thresholds are validated to ensure the receiver isn’t degraded. Cyclic error compensation algorithms are verified against known baseline metrics. Finally, we perform a thermal burn-in to ensure the sub-nanometer resolution doesn’t drift as the board reaches operating temperature.
Replacement Pitfall Guide
❗ Laser Compatibility Check: The ZYGO is designed for specific ZMI laser sources (7702, 7714, 7724). Do not attempt to interface it with incompatible laser heads or older non-ZMI systems. Mismatched optical frequencies will result in zero position data.
❗ Optical Power Budget: The minimum optical power requirement is incredibly low (0.07 µW), but fiber degradation happens. If you are replacing a board because of intermittent errors, check the optical fiber attenuation first. A dirty connector can mimic a failed receiver.
❗ VME Backplane Seating: This is a 6U VME64x card. Ensure the backplane supports the 64x standard if you require the full data throughput. Seating a 6U card requires even pressure on both the top and bottom ejectors to avoid bending P1/P2 connector pins.
❗ Cyclic Error Compensation Settings: This module features proprietary cyclic error reduction. If migrating from an older board without this feature, verify your system software is configured to expect the compensated data stream. Uncompensated legacy software will misinterpret the corrected position values.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| (C) | Direct | “C” variant includes cyclic error compensation; direct upgrade | |
| ZMI-4004 | Needs Adaptation | 4004 has 0.15nm res but lower max speed; verify motion profile | |
| ZMI-2400 | Needs Adaptation | 2400 is single-axis; requires 4x cards for same channel count | |
| ZMI-501A | Not Compatible | 501A is standalone enclosure, not a VME module |
- Position Resolution: 0.15 nm (at max speed)
- Max Measurement Speed: ±2.55 m/s
Need help verifying your optical fiber run length or checking VME backplane compatibility for this module? I can walk you through the integration checklist.
