• Part Number: 8070-0902-03X（also 8070-0902-03）

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

• Manufacturer: ZYGO（AMETEK）

• Product Type: Dual-frequency HeNe laser source for interferometry

• Application: High-precision displacement measurement, semiconductor lithography, ZMI-501A system 2-axis metrology

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

Optical Specifications

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

• Wavelength: 632.8 nm（vacuum：F1=632.991501 nm，F2=632.991528 nm）

• Split Frequency: 3.6 MHz（Zeeman split）

• Output Power: ≥250 µW（Class II laser）

• Beam Diameter: 4 mm（standard）

• Beam Divergence: ≤1.5 mrad

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

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

• Coherence Length: >100 m

Electrical Specifications

• Power Supply: +15 VDC ±0.5 V

• Operating Current: ~0.6 A（typical）

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

• Laser Classification: 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: Aluminum/ABS, rugged industrial design

• Cable Clearance: 102 mm（4 in）minimum

• Mounting: M3 screw holes（4 locations）

Environmental Specifications

• Operating Temperature: 0 °C to +40 °C

• Storage Temperature: −40 °C to +70 °C

• Relative Humidity: 0%–85% RH, non-condensing

• Environment: Cleanroom-compatible, 24/7 continuous operation

Key Features

• Dual-frequency 3.6 MHz output optimized for ZMI-501A 2-axis interferometer systems

• Ultra-stable frequency（10 ppb）ensures nanometer-level measurement accuracy

• Compact, lightweight design for easy integration into precision stages and OEM equipment

• Class II laser：safe for industrial use with minimal eye hazard

• Plug-and-play compatibility with ZMI-501A electronics（8020-0237-01）