Description
⚙️ Product Overview
The ZYGO Model 7702, P/N 8070-0102-01, is a 6 mm laser head designed for ZYGO laser interferometry systems. The exact part number is identified in current and historical equipment listings as a ZYGO 7702 6 mm Laser Head.
This type of laser head serves as the optical reference source for precision interferometric measurement. It is intended to work with compatible ZYGO measurement electronics and optical components rather than as a general-purpose industrial laser.
The referenced eBay item is listed as Used, with Model 7702 and part number 8070-0102-01.
🔹 Brand: ZYGO
🔹 Model: 7702
🔹 Part Number: 8070-0102-01
🔹 Product Type: Laser Head
🔹 Beam Configuration: 6 mm
🔹 Application: Laser Interferometry / Precision Measurement
🔹 Condition: Used
🔧 Key Features
🔹 ZYGO Model 7702 laser head
🔹 6 mm beam configuration
🔹 Part number 8070-0102-01
🔹 Designed for precision interferometric measurement systems
🔹 Used as an optical reference source for displacement measurement
🔹 Suitable for metrology and semiconductor equipment applications
🔹 Equipment-specific optical and electrical interfaces
🔹 Exact system compatibility should be verified before installation
Public listings for the same P/N also identify 8070-0102-01 as a 6 mm ZMI Series laser head. One listing further identifies the configuration as a 400 mW-class unit, but this should be verified against the actual nameplate or manufacturer documentation before using it as a guaranteed specification.
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | ZYGO |
| Model | 7702 |
| Part Number | 8070-0102-01 |
| Product Name | 6 mm Laser Head |
| Product Type | Laser Head / Interferometry Light Source |
| Series | ZMI Series Reference |
| Beam Size | 6 mm |
| Optical Function | Interferometric Measurement Reference |
| Laser Type | Verify Actual Unit / Documentation |
| Output Power | Verify Actual Unit |
| Wavelength | Verify Actual Unit |
| Frequency Configuration | Verify Actual Unit |
| Optical Connector | Verify Actual Unit |
| Electrical Connector | Verify Actual Unit |
| Operating Voltage | Verify Actual Unit |
| Cooling | Verify Actual Unit |
| Application | Precision Displacement / Metrology |
| Compatible System | ZYGO Interferometry Equipment |
| Condition | Used |
The available public records consistently identify the unit as Model 7702, 6 mm, P/N 8070-0102-01. Detailed electrical and optical specifications should be matched to the actual unit because different 7702 configurations exist.
⚡ Operating Function
A ZYGO laser head provides the stable optical reference required by a laser interferometer.
A simplified measurement arrangement is:
ZYGO Laser Head → Interferometer Optics → Measurement Axis → Detector / Measurement Electronics
The laser beam is directed through the interferometer optical path. Changes in the optical path length produce interference information that can be processed by the measurement electronics to determine extremely small changes in position or displacement.
For equipment used in semiconductor manufacturing and precision manufacturing, this type of measurement can be applied to:
- Stage positioning
- Linear displacement
- Precision motion systems
- Machine calibration
- Wafer-stage metrology
- Optical alignment
- Dimensional measurement
The laser head itself should therefore be considered one part of a complete interferometric measurement system. It is not normally operated as a standalone laser measurement instrument.
🧰 Installation & Configuration
🔹 Verify the Laser Head
Before installation, confirm:
- Model 7702
- P/N 8070-0102-01
- 6 mm configuration
- Serial number
- Revision or date code
- Connector arrangement
- Optical interface
- Physical mounting configuration
🔹 Optical Inspection
Inspect the optical output area carefully for:
- Dust
- Contamination
- Scratches
- Damaged optical surfaces
- Foreign particles
- Signs of impact
Do not touch optical surfaces directly.
🔹 Electrical Connection
Before powering the laser head, confirm the correct cable and compatible ZYGO measurement electronics.
Check:
- Connector type
- Pin configuration
- Supply requirements
- Signal interface
- Equipment interlocks
Do not assume that another ZYGO laser head with a similar housing uses the same electrical configuration.
🔹 Optical Alignment
After installation, the laser path should be aligned according to the target interferometer configuration.
Typical checks include:
- Mechanical mounting.
- Laser beam path.
- Optical axis alignment.
- Interferometer alignment.
- Detector signal.
- Measurement stability.
- Position feedback accuracy.
Final alignment should be performed with the appropriate ZYGO measurement equipment and procedures.
🔩 Maintenance Recommendations
🔧 Keep the Optical Path Clean
Dust and contamination can reduce optical performance or interfere with measurement stability.
Store the laser head with suitable protective covers when it is not installed.
🔧 Avoid Mechanical Shock
Precision laser heads contain optical and electronic components that can be affected by impact or vibration.
Use appropriate protective packaging during transportation.
🔧 Monitor Measurement Stability
If the interferometer develops abnormal readings, check the complete optical chain rather than immediately assuming the laser head has failed.
Possible areas to inspect include:
- Laser output
- Optical alignment
- Beam path
- Reflector position
- Detector
- Measurement electronics
- Cable connections
- Environmental vibration
🧾 Record Calibration Information
For maintenance inventory, record:
- Model
- Part number
- Serial number
- Manufacturing/date code
- Installation equipment
- Operating hours where available
- Calibration status
- Test results
This is especially useful for precision metrology equipment.
❓ Frequently Asked Questions
Q: What is the ZYGO 7702 8070-0102-01?
A: It is a ZYGO Model 7702 6 mm laser head, P/N 8070-0102-01, used as an optical source in laser interferometric measurement systems.
Q: What does “6 mm” refer to?
A: It identifies the 6 mm beam configuration associated with this particular 7702 laser-head part number.
Q: Is 8070-0102-01 compatible with every ZYGO interferometer?
A: No. Compatibility depends on the specific interferometer, measurement electronics, optical configuration, connectors, and system revision.
Q: Is this a complete interferometer?
A: No. The 7702 laser head is a component of a larger interferometric measurement system. Additional optical and electronic components are required for complete displacement measurement.
Q: Is the referenced unit new?
A: No. The referenced eBay listing identifies the item as Used.
Q: What should be checked before purchasing?
A: Confirm Model 7702, P/N 8070-0102-01, 6 mm configuration, serial/date code, physical condition, connectors, and compatibility with the target ZYGO system.
Q: Can a different 7702 part number replace 8070-0102-01?
A: Not automatically. Other 7702 laser-head configurations exist, and beam configuration and other optical characteristics may differ. The exact P/N should be matched before replacement.
🔄 Related ZYGO Components
- ZYGO 7702 — Laser Head
- ZYGO 8070-0102-01 — 6 mm Laser Head
- ZYGO 8070-0102-02 — Related 7702 Laser Head Configuration
- ZYGO 8070-0102-03 — Related 7702 Laser Head Configuration
- ZYGO 8070-0102-04 — Related 7702 Laser Head Configuration
- ZYGO 8070-0102-05 — 7702 Laser Head Variant
- ZYGO 8070-0102-06 — 7702 Laser Head Variant
- ZYGO ZMI Measurement Electronics
- ZYGO Laser Interferometer Optics
- ZYGO Interferometer Measurement System
The related 8070-0102 variants should be treated as configuration references rather than direct substitutes. Public listings show multiple 7702 laser-head part numbers with different configurations.
🏭 Application Summary
The ZYGO 7702 P/N 8070-0102-01 is a specialized 6 mm laser head for precision interferometric measurement. It provides the optical reference required by compatible ZYGO interferometry systems and can be used in precision positioning, metrology, semiconductor equipment, and other high-accuracy measurement applications.
For replacement purposes, the complete part number is important. The 7702 model, 8070-0102-01 P/N, 6 mm configuration, optical interface, electrical interface, and system compatibility should all be confirmed before installation.
Product Identification: ZYGO 7702
Part Number: 8070-0102-01
Product Type: 6 mm Laser Head
Application: Laser Interferometry / Precision Metrology
Condition: Used
