Delta 7 | Deformable Phase Plate
Clear aperture diameter
10 mm
Number of actuators
63
Wavefront RMS error of best flat
< 15 nm (orientation independent)
Maximum peak-to-valley of the generated wavefronts
> 8 µm
Maximum spatial frequency of the correction
7th radial order of Zernike modes
Optical transmission (VIS-NIR version)
400 nm - 2200 nm 80% at λ=800 nm (no AR coatings applied)
Laser Induced Damage Threshold (LIDT)
10 W/cm² for 10s @ 1070nm CW
Nominal operation laser power
Factory calibrated for < 100 mW CW (over full optical aperture)
Delta 7 – Deformable Phase Plate for easy adaptive optics
The Delta 7 is the latest breakthrough in adaptive optics technology. Manufactured by Phaseform, the Deformable Phase Plate (DPP) is a new kind of fully transmissive, miniaturized wavefront modulator. It delivers dynamic, real-time aberration correction and can be placed directly into an optical beam path, much like a regular lens. The DPP consists of a fluid-filled chamber enclosed by a flexible membrane that is shaped by electrostatic forces. These forces are produced by a two-dimensional array of transparent electrodes integrated within the optical aperture of the DPP. The advanced optofluidic design of the DPP ensures gravity-independent operation, enabling high-quality wavefront modulation regardless of orientation.

Setting up an adaptive optics set-up using delta 7 has never been simpler. Contrary to conventional deformable mirrors, no relay lenses are needed and Delta 7 can be placed exactly where the aberrations need to be corrected ! For example , as we show below, in microscopy applications, Delta 7 can be directly inserted at the back pupil of the microscope objective !

Key Features of Delta 7
Complex Wavefront Modulation: Features 63 electrodes, capable of replicating up to the 7th radial order of Zernike polynomials (>35 modes) with exceptional accuracy.
Seamless System Integration: Compact design compatible with microscope objectives, standard 30 mm cage systems, including rods, lens tubes, and post assemblies.
Precise & Hysteresis-Free Operation: Electrostatic actuation ensures a linear response, enabling open-loop wavefront control with reliability.
Exceptional Optical Performance: Active best flat with induced RMS wavefront error below λ/40 for outstanding precision.
Polarization Agnostic: Wavefront modulation remains unaffected by light polarization, ensuring optimal efficiency

| GENERAL SPECIFICATIONS | |
|---|---|
| Modulator type | Optofluidic DPP (Deformable Phase Plate), electrostatically actuated |
| Clear aperture diameter | 10 mm |
| Number of actuators | 63 |
| Number of actuators across aperture diameter | 7 |
| Connectivity | USB 2.0 |
| Operating system | Windows, Linux, and macOS |
| Driving software | SDK and GUI available in Python. Wrapper to execute Python functions in Matlab. |
| OPTICAL SPECIFICATIONS | |
|---|---|
| Wavefront RMS error of best flat | < 15 nm (orientation independent) |
| Maximum peak-to-valley of the generated wavefronts | > 8 µm |
| Maximum spatial frequency of the correction | 7th radial order of Zernike modes |
| Optical transmission (VIS-NIR version) | 400 nm - 2200 nm 80% at λ=800 nm (no AR coatings applied) |
| Laser Induced Damage Threshold (LIDT) | 10 W/cm² for 10s @ 1070nm CW |
| Nominal operation laser power | Factory calibrated for < 100 mW CW (over full optical aperture) |
| Included in the Delta 7 package | Driving electronics, control software, cables, manual |
| MECHANICAL SPECIFICATIONS | |
|---|---|
| Thickness (within clear aperture) | 0.87 mm |
| Response time (best flat to maximum deformation) | < 55 ms |
| Hysteresis | < 1 % |
| Linearity | > 92 % |
| Mounting compatibility | 30 mm cage system rods, SM1 tubing, and ⌀=1/2” post |
| Connector cable length | 1.5 m |
| ELECTRICAL SPECIFICATIONS | |
|---|---|
| Actuator voltage | up to 295 V DC |
| Maximum power consumption | < 9 W |
| Power supply | 120/230 VAC, 2.5 phono plug (included) |
| THERMAL SPECIFICATIONS | |
|---|---|
| Storage temperature | 10 °C to 35 °C |
| Operating temperature | 20 °C to 25 °C |






