Description

The Zygo 8070-0258-02 (Model t-x6-4401) is a precision Helium-Neon (HeNe) laser head engineered for high-accuracy displacement interferometry, optical metrology, and semiconductor wafer positioning systems. Operating on a primary wavelength of 632.8 nm, this sub-component delivers the frequency-stabilized optical reference required by precision multi-axis measurement systems. The assembly is housed in a robust, industrially sealed enclosure to isolate the optical cavity from thermal expansion and ambient acoustic vibrations, ensuring sub-nanometer measurement repeatability in sub-micron manufacturing environments.

Commercial Availability & Procurement

• Condition: Factory Sealed / New Surplus (or Refurbished/Tested depending on current batch allocation)
• Warranty: 12-Month Comprehensive Warranty covering optical output stability and tube life
• Availability: In Stock
• Estimated Lead Time: 3–7 business days worldwide via trackable express couriers (DHL Express / FedEx Priority)
• Pricing Policy: Price is subject to market demand, laser tube shelf-life verification, and current inventory levels. Contact our industrial metrology desk for a firm, itemized quotation.

Technical Specifications

System Integration & Real-World Field Constraints

Frequency Stabilization and Environmental Control

The 8070-0258-02 relies on precise thermal and electronic balancing to lock its longitudinal cavity modes. It must be paired with an approved Zygo laser power supply and controller axis card to achieve sub-nanometer resolution.

Field Engineering Note: During commissioning at the 2 AM shift, ambient temperature drift is the primary cause of alignment faults. The laser head should be mounted away from local heat sources, such as servo motor drives or power switchgear. Ensure the tool’s enclosure maintains an ambient air temperature stability of ±0.1 °C to prevent refractive index drift along the open measurement path.

Fiber Interfacing and Alignment

Metrology configurations utilizing this laser head typically transport the 632.8 nm beam through single-mode polarization-maintaining (PM) fiber optic patch cords to remote interferometer splitters.

• Bend Radius: Maintain a minimum 75 mm bend radius on all PM fiber cables to avoid polarization cross-coupling and signal attenuation.
• Beam Launching: When manually tuning the beam launch mechanics into the fiber coupler, use a dedicated optical power meter. Tighten the kinematic adjustment screws progressively in a star pattern to prevent mechanical relaxation over extended duty cycles.

Safety and Compliance

This unit contains high-voltage excitation electronics inside the sealed tube chassis. The laser head emits visible laser radiation.

• Always position optical interrupters or beam dumps to block stray reflections during path alignment.
• Do not attempt to open the sealed housing or modify internal ballast resistors, as doing so voids the warranty and exposes the technician to risk of high-voltage electrical shock.

Frequently Asked Questions

Can the 8070-0258-02 replace an older 8070-0102-01 or 7702 model laser head?

The 8070-0258-02 functions within the same 8070 family architecture, but sub-assembly suffix changes (-02 vs -01) usually indicate variations in beam diameter, localized mounting brackets, or pinning layouts on the electrical interface connector. Before physical swap-out, map the pin configurations of your existing wiring harness and confirm that the receiver optics can accept the beam spot diameter without clipping.

What are the indicators of a failing or depleted HeNe laser tube?

The most reliable sign of laser tube aging is an extended stabilization period during power-up, where the controller fails to establish a “Ready” status within the standard 10-minute window. Physically, a depleted tube will exhibit a drop in raw optical output power (measured in microwatts before the splitter) or display erratic intensity fluctuations. If the beam begins to blink or completely drops during long scanning cycles, the internal gas mixture is likely depleted or contaminated, requiring factory refurbishment.

Does this product include the laser power supply unit and alignment baseplate?

No. The 8070-0258-02 designation applies strictly to the bare laser head assembly. Power units, custom kinematic alignment plates, receiver boards, and fiber optic cabling must be sourced independently or carried over from your machine’s original configuration. Verify all accessory part numbers with the OEM system manual before final assembly.