Plane Mirror Target for Interferometer Alignment
By Zygo | Published: 2026-10-25
Category: Buying Guides
Learn how the Zygo Plane Mirror Target simplifies interferometer alignment for HPSMI, TACI, and DPMI systems, and get practical decision rules for choosing between Standard and Reversed styles.
Quick answer
For aligning interferometers in HPSMI, TACI, or DPMI systems, the Zygo Plane Mirror Target provides a reliable reference surface. Choose the Standard style for typical setups and the Reversed style when your mounting constraints require a flipped orientation.
Why Style Choice Matters for Alignment
The Plane Mirror Target is not a one-size-fits-all accessory. Its two style options—Standard and Reversed—address different physical mounting and beam-path requirements. Selecting the wrong style can force you to rework your setup or add unnecessary adapters.
The Standard style (SKU 6191-0437-03) is the default choice for most benchtop configurations. The Reversed style (SKU 6191-0437-05) mirrors the mounting flange orientation, which helps when your interferometer head or fixture restricts access to one side.
Compatibility Considerations
This target is explicitly compatible with HPSMI, TACI, and DPMI systems. If you use a different interferometer platform, you will need to verify mechanical and optical compatibility separately. The catalog does not list adapters or cross-brand support.
The target is an optical accessory, not a standalone alignment tool. You still need a properly collimated source and a stable mount to achieve repeatable alignment.
Decision rules for choosing your Plane Mirror Target
- If your interferometer is mounted on a standard optical breadboard: Choose the Standard style (SKU 6191-0437-03). It is the default orientation and fits most benchtop configurations without extra adapters.
- If your mounting flange faces away from the accessible side: Choose the Reversed style (SKU 6191-0437-05). It flips the mirror orientation to match setups where the target must be placed on the opposite side of the fixture. Verify your fixture's flange orientation before ordering to avoid returns.
- If you are unsure about your setup geometry: Start with the Standard style. It is the more common choice and can be adapted with simple shims or spacers in most cases. The Reversed style is a deliberate option for constrained spaces. Measure the available clearance on both sides of your interferometer head before finalizing.
Product facts
- Plane Mirror Target: Available in Standard and Reversed style options, each with a distinct SKU. Choosing the correct style avoids physical interference in your setup and saves time during initial alignment.
Plane Mirror Target
Who should buy this?
Best for
- Technicians aligning HPSMI, TACI, or DPMI interferometers who need a dedicated reference mirror
- Users who already have a compatible interferometer and want a purpose-built alignment aid instead of a generic mirror
Not for
- Users of interferometer platforms other than HPSMI, TACI, or DPMI (compatibility is unverified)
- Applications requiring a flatness specification better than the unstated catalog tolerance (check your system requirements separately)
