Advanced Performance Fizeau and LUPI Interferometers

Fast, Accurate Surface and Wavefront Measurements

Optical Metrology Instruments That Boost ROI

There’s no room for downtime or inaccuracies when it comes to optical manufacturing. Interferometers with low imaging resolution and obsolete software cut into profits and damage your reputation by sacrificing time and quality. 

Äpre interferometers – both standard and custom – improve your metrology capabilities so you can meet your customer’s demands. Choose from our high-performance interferometers or build the system that works for you.

High Performance Fizeau Interferometers

S50, S100, S150 1MP

S-Series Fizeau Interferometers


  • 1 megapixel @160 Hz diffraction-limited imaging
  • 10X virtual zoom
  • 2X greater slope acceptance


S50, S100, S150 4MP

S-Series Fizeau Interferometers


  • 4 megapixel @180 Hz diffraction-limited imaging
  • 20X virtual zoom
  • 4X greater slope acceptance


Ä100, Ä150 4MP & 9MP

Ä-Series Fizeau Interferometers

Coherence Controlled FIZEAU

  • 4 megapixel imaging for high resolution
  • 9 megapixel imaging for the ultimate slope acceptance and resolution
  • Spatial Coherence Busting reducing coherent artifacts



S300 | 4MP

S-Series Fizeau Interferometers

300 mm FIZEAU

  • 4 megapixel @180 Hz diffraction-limited imaging
  • 20X virtual zoom beats a 1-Megapixel 4″ Zoom Fizeau resolution!


INTRODUCING the Ä9|9MP Fizeau for Mid-Spatial Frequency Surface Metrology

Ä9|9MP Fizeau interferometer enables practical Mid-Spatial Frequency measurement: Advanced camera limited optical design, controlled spatial and temporal coherence, and rapid data acquisition.

Available in bench-top or fully automated systems.

Contact ÄPRE today to learn more

Custom Interferometry

Don’t see what you need? Talk to our engineers about designing your system.

Custom Systems Built to Your Specifications

LUPI Interferometers for Wavefront Testing


Apre’s Twyman-Green LUPI Interferometer conducts system wavefront testing with the flexibility you need:

Your LUPI Interferometer Choices

S9 | SR

Compact, flexible design with
1 Megapixel Imaging

Data Acquisition Choices

Visual, Vibration Tolerant PSI or Vibration Insensitive Phase

Standard & Custom Wavelengths

633 nm, 1550 nm or send us your requirement

Sources: Choose One or More, Now... or Later


SpectrÄ: SCI

Spectrally Controlled Interferometry for Prisms, Flats, and Substrates

  • Radius of Curvature
  • Front and Back Surfaces
  • Domes
  • Material Homogeneity
  • Stacked Substrates
  • More

ÄTLas 633

Fiber-Coupled Tunable Laser Interferometry

  • Large Optics
  • Cavities from 5 mm-2500 mm
  • Wavelength Shifting Upgrades



ÄTLas 633 Precision Turnable Laser

Download Monitor Form
ÄTLas 633 Precision Turnable Laser

HeNe Laser

HeNe right Mode for Easy Cavity Alignment

  • The standard: Required for CGH applications

Diode Laser

Diode Laser with Bright Mode for Easy Cavity Alignment

  • Bright mode for easy cavity alignment

Custom Interferometry

Don’t see what you need? Talk to our engineers about designing your system.

Optical Accessories for Surface Measurement and Testing

Made in the USA, Äpre’s optical, mechanical, and radius accessories help you build a complete system or upgrade your existing metrology setup. Our high-quality laser Fizeau reference optics measure polished surfaces (transmission spheres and flats) and system-testing wavefronts and are suitable for CNC spot polishing processes that demand smooth reference surfaces.



Transmission Flats
Transmission Spheres
Reference Flats
Beam Expanders


Mount Accessories
Vertical Workstations


Guide Rail (manual)
SCI – call for information

Äpre Interferometers Give You More

<5s Measure to Report
No Surface Prep
Four Sources, One Interferometer
Free Software Upgrades for LIFE

Yesterday's Interferometers are Costing You Today

Low Imaging Resolution
Obsolete Software
Expensive Options

Refurbished Interferometers

Do you need to add capacity with a limited budget?

These fully upgraded/refurbished interferometers might be what you are looking for.

"I have been extremely impressed by Äpre... and look forward to continuing to work with Äpre in the future."
Ted K.Blue Ridge Optics
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