Product Details

The ZYGO ZMI-510, part number 0870-0902-0X, is a discontinued compact air-cooled two-frequency He-Ne heterodyne laser head, developed to pair with ZMI series measurement electronics for high-precision displacement metrology. It is suitable for space-limited optical inspection equipment, small precision positioning stages and customized metrology systems requiring nanometer-level measurement accuracy. It outputs 632.8nm frequency-stabilized laser with two orthogonal linear polarization frequencies, fixed beat frequency difference of 20MHz ±1600Hz, supplying stable reference beat signal for heterodyne interferometer decoding.

This ZMI-510 laser head adopts compact size design compared with ZMI-7705 series, with carefully tuned optical power and beam quality to fit the optical input threshold of matched ZMI measurement boards. It integrates built-in optical isolator to suppress back-reflection from interferometer optics and retroreflectors, lowering the risk of PLL unlock and sudden measurement jump. The power supply is ±15VDC and +5VDC, it needs sufficient warm-up time to reach stable wavelength state before formal measurement. Multiple ZMI-510 laser heads can be synchronized for multi-axis compact stage systems. Its fiber interface and optical parameters are dedicated to ZMI-510 platform, not interchangeable with ZMI-7705 or 7702 laser heads.

It is equipped with BNC RF beat output port, laser interlock and temperature monitoring interface. The front panel has power and laser lock status LED indicators for routine inspection and fault diagnosis. The compact housing uses vibration damping structure and EMC shielding to resist electromagnetic noise from servo drivers and linear motors in cleanroom environments. Users must confirm full part number 0870-0902-0X and model ZMI-510 before replacement, match supporting measurement electronics, fiber harness and interferometer optics. This legacy ZYGO 0870-0902-0X ZMI-510 laser head is mainly supplied as spare replacement part for existing ZMI metrology systems. Users need to verify optical power, beat frequency and optical path alignment after installation. A conformal coated version is optional for high humidity and dusty industrial sites. This laser head is widely used in compact metrology bench upgrade, small precision stage maintenance and nanometer closed-loop motion feedback projects.

This two-frequency He-Ne laser head adopts compact standalone housing structure. It requires ±15VDC and +5VDC power supply. LED indicators display power and laser lock status for convenient on-site inspection. The optimal operating temperature range is 15°C to 30°C, storage temperature ranges from -40°C to +85°C, relative humidity 5% to 50% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports optical path calibration backup for fast recovery after hardware replacement.

This ZYGO 0870-0902-0X ZMI-510 laser head is widely applied in high-precision laser interferometer measurement systems. It provides stable two-frequency laser source for matched ZMI measurement electronics. As a reliable spare part for ZYGO legacy metrology systems, the ZMI-510 retains original heterodyne frequency characteristics and optical compatibility, helping customers reduce maintenance cost of legacy ultra-precision measurement equipment.