General Information

• Part Number: 8070-0902-01X（also 8070-0902-01）

• Model: ZMI-7705（ZMI™ Series Laser Head）

• Manufacturer: ZYGO（AMETEK）

• Product Type: Zeeman-split dual-frequency HeNe laser for interferometry

• Application: High-precision displacement measurement, semiconductor metrology, 2-axis systems

• Compatible Electronics: ZMI-501A（8020-0237-01）measurement enclosure

Optical Specifications

• Laser Type: CW, linearly polarized, two-frequency HeNe

• Vacuum Wavelength: F1=632.991501 nm（vert）；F2=632.991528 nm（horiz）

• Beat Frequency: 3.6 MHz（Zeeman split）

• Output Power: ≥250 µW（Class II）

• Beam Diameter: 4 mm（standard）

• Frequency Stability: 10 ppb（3σ, 1 hr）

• Warm-up Time: <10 min（full stability）

• Coherence Length: >100 m

• Beam Divergence: ≤1.5 mrad

Electrical Specifications

• Power Supply: +15 VDC ±0.5 V

• Operating Current: ~0.6 A（typical）

• Power Consumption: 7 W（operate）；9 W（pre-heat）

• Laser Class: Class II（IEC 60825-1）

• Signal Interface: Fiber-coupled reference/measurement outputs

Mechanical Parameters

• Dimensions（L×W×H）: ~180 mm × 80 mm × 50 mm

• Weight: ~1 kg（2.2 lb）

• Housing: Anodized aluminum, industrial rugged

• Mounting: 4×M3 screw holes

Environmental Specifications

• Operating Temp: 0 °C to +40 °C

• Storage Temp: −40 °C to +70 °C

• Humidity: 0%–85% RH, non-condensing

• Operation: 24/7 continuous, cleanroom-compatible

Key Features

• 3.6 MHz Zeeman split optimized for ZMI-501A 2-axis interferometer systems

• 10 ppb frequency stability ensures nanometer-level accuracy

• Compact & lightweight for easy integration into precision stages

• Class II laser：safe industrial use, minimal eye hazard

• Direct plug-and-play with ZMI-501A electronics