12" PMR Kit Installation for Large Aperture Systems

By Zygo | Published: 2026-10-26

Category: How-to Guides

Learn how to install the Zygo 12" Phase Modulating Receptacle (PMR) Kit with power supply for large aperture systems, including key steps and common pitfalls.

Quick Answer

Install the Zygo 12" PMR Kit by first verifying system compatibility, then mounting the receptacle, connecting the power supply, and performing a phase calibration check.

Why a dedicated 12" PMR kit matters

A phase modulating receptacle (PMR) is the interface between your large aperture interferometer and the optic under test. The 12" size is designed for systems with a 12-inch clear aperture, ensuring the modulated beam covers the full test area without clipping.

Using a mismatched or generic receptacle can introduce wavefront errors, reduce measurement repeatability, and even damage the mounting surfaces. The dedicated kit includes the receptacle and a power supply matched to the modulation electronics.

Before you start: what to check

Confirm that your interferometer's mounting flange matches the 12" PMR kit's bolt pattern. The kit is sold under the Large Aperture Systems category, so it's intended for systems with a 12-inch aperture, but always verify the exact interface dimensions with your system's manual.

Ensure the power supply voltage and connector type match your lab's electrical outlets and the receptacle's input. The kit includes a power supply, but you may need a local plug adapter if you're outside the region where the system was originally configured.

Installation steps

Verify compatibility: Check that your interferometer's mounting flange matches the 12" PMR kit's bolt pattern and that the system aperture is 12 inches. Also confirm the power supply voltage matches your lab's supply. If the bolt pattern doesn't match, do not force the mount; contact the manufacturer for an adapter plate.
Power down and lock out: Turn off the interferometer and any connected lasers. Follow your facility's lockout/tagout procedure to prevent accidental startup during installation. Never work on the optical mount while the system is powered or the laser is active.
Mount the receptacle: Align the 12" PMR receptacle to the mounting flange and hand-tighten the bolts in a star pattern. Then torque to the manufacturer's specification (if provided). Avoid over-tightening, which can distort the receptacle. Use a torque wrench if a spec is given; otherwise, tighten evenly and moderately.
Connect the power supply: Connect the power supply cable to the receptacle's input, then plug the supply into a grounded outlet. Do not connect power until the receptacle is fully mounted. Double-check that the connector is fully seated to avoid intermittent contact.
Power on and verify: Power on the system and run a built-in self-test or a simple phase measurement with a reference flat. Confirm that the modulation is stable and the wavefront is within expected limits. If the phase signal is noisy, re-check the power connection and ensure the receptacle is clean.
Document and calibrate: Record the installation date, torque values, and any test results in your maintenance log. Perform a full system calibration if your interferometer requires it after installing new hardware. Keep the log accessible for future troubleshooting and preventive maintenance.

Product facts

12" PMR Kit (Phase Modulating Recepticle) with power supply: The ZYGO 12" PMR Kit (Phase Modulating Recepticle) with power supply is offered under the Large Aperture Systems category and is identified by SKU 6500-0191-11 in the Standard configuration. This kit is purpose-built for 12-inch aperture systems, so you get a matched receptacle and power supply that work together for reliable phase modulation.
12" PMR Kit (Phase Modulating Recepticle) with power supply