Product Details

The ZYGO ZMI-2001, part number 8020-0210-01, is a discontinued revision variant of 6U VMEbus single-axis heterodyne laser interferometer measurement board, belonging to ZYGO ZMI 2000 metrology series, matched with ZMI-2002 dual-channel board. It adopts 633nm frequency-stabilized He-Ne laser heterodyne signal processing architecture, dedicated to ultra-precise single-axis displacement measurement for legacy semiconductor lithography equipment, wafer positioning stages and optical precision motion control systems. This -01 suffix represents the specific hardware revision version, with fixed component layout and firmware version, which needs to be strictly distinguished from other revisions of 8020-0210 to guarantee system compatibility.

This board supports one independent measurement channel, with typical resolution of 0.15nm under 4-pass optical setup and 0.31nm under 2-pass mode. It features 25ns time resolution and up to 7.7MHz P2 bus data throughput, outputting real-time position data for closed-loop servo control. It supports daisy-chain cascading via P2 backplane connector, multiple ZMI-2001 and ZMI-2002 boards can be combined to expand multi-axis measurement in one VME chassis. It is equipped with fiber optical signal input and BNC reference signal port, and reserves analog input interface for environmental compensation including air temperature, pressure and humidity, to correct air refractive index error and ensure long-term measurement traceability. It integrates real-time signal quality monitoring function, which can output PLL lock status, optical signal loss and error flag, helping engineers quickly judge optical path deviation and signal attenuation during optical alignment and equipment debugging.

It complies with standard VMEbus specification, supports A16/A24 addressing and D16/D32 data transmission, and can run as bus master or slave to exchange high-speed position data with host VME CPU board. Users need to confirm the revision number 8020-0210-01 before installation, match the corresponding laser head, optical accessories and compatible host firmware, and configure measurement scale factor, digital filter parameters and interrupt mapping through dedicated ZYGO configuration software. The onboard EMC signal conditioning circuit suppresses electromagnetic noise generated by servo drivers and linear motor controllers, maintaining stable measurement output in clean precision workshop environments. The front panel is equipped with status LED indicators for power supply, signal lock and fault alarm, convenient for routine inspection and maintenance. The PCB adopts high-precision analog layout and industrial-grade components, designed for long-term continuous operation in wafer positioning equipment, optical component testing, ultra-precision machine tools and aerospace precision alignment systems. This legacy ZMI-2001 8020-0210-01 board is mainly supplied as spare replacement parts for existing ZYGO laser metrology systems. Users need to verify revision consistency before replacement to avoid communication mismatch. A conformal coated version is optional for high humidity and dusty industrial sites. This module is widely used in single-axis precision stage calibration, nanometer motion feedback and old laser measurement system renovation projects.

This single channel laser interferometer measurement board adopts standard 6U single-height VME rack mount structure. It draws power from the VME backplane. LED indicators display power status, signal lock and measurement fault for convenient on-site inspection. The operating temperature range is 0°C to 40°C, storage temperature ranges from -40°C to +85°C, relative humidity 5% to 95% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports measurement parameter configuration backup for fast recovery after hardware replacement.

This ZYGO ZMI-2001 (8020-0210-01) metrology board is widely applied in high-precision motion control and laser interferometer measurement systems. It provides single-channel sub-nanometer displacement feedback for precision positioning stages. As a reliable spare part for ZYGO legacy metrology systems, the ZYGO ZMI-2001 8020-0210-01 retains original heterodyne signal timing and laser head compatibility, helping customers reduce maintenance cost of legacy ultra-precision measurement equipment.