PLUTO-2.1 LCOS Spatial Light Modulator

PLUTO-2.1 LCOS Spatial Light Modulator

The PLUTO-2.1 LCOS Spatial Light Modulator is the all-rounder within our product range. It is the best qualified and diversified SLM platform with many versions optimized for specific requirements, including high reflectivity versions featuring a dielectric mirror for high power applications. The PLUTO hardware is already implemented in different industrial applications.

PLUTO-2.1 Spatial Light Modulator – Microdisplay Features

Display Type

Reflective LCOS (Phase Only)

Resolution

1920 x 1080

Pixel Pitch

8.0 µm

Fill Factor

93 %

Active Area

15.36 x 8.64 mm (0.7″ Diagonal)

Addressing

8 Bit (256 Grey Levels)

Signal Formats

HDMI – HDTV Resolution

Input Frame Rate

60 Hz

The PLUTO-2.1 phase only Spatial Light Modulator (SLM) consists of a driver unit with standard digital video interface (HDMI) and a phase only LCOS (Liquid Crystal on Silicon) microdisplay with full HD resolution (1920 x 1080 pixel) and 8 µm pixel pitch leading to an active area diagonal of 0.7” with aspect ratio of 16:9.

The PLUTO-2.1 SLM is a plug & play phase modulator device and can be addressed with phase functions via standard graphics cards as an extended monitor device. The green color channel of the video signal is used for addressing 8 bit gray level patterns. Addressing can be done using the supplied Pattern Generator software or the SLM Slideshow Player software or standard image viewer software. HOLOEYE also provides an SLM Display Software Development Kit (SDK) which provides APIs (Application Programming Interface) for different programming languages.

HOLOEYE offers different display versions that can be driven with the PLUTO-2.1 driver unit. The different panel versions are optimized for the use at different wavelength ranges and different applications. All versions use fast full digital addressing which assures high reliability and a compact driver unit as basically only two voltages need to be generated.

The PLUTO-2.1 driver uses an HDMI interface for addressing phase functions and an USB connection to communicate with the driver (to changing the voltage vs. gray level distribution (gamma control) and dynamic range (voltage across the LC cell) in order to calibrate the SLM for different wavelengths). Besides this the driver features a trigger sync output to synchronize the device with external devices.

The PLUTO-2.1 driver also features a dual-core ARM® Cortex™-A9 processor which also includes on-chip memory. This enables the user to program additional functionality which is directly processed on the SLM device (e.g. a slideshow from images which are loaded from USB flash or from internal memory). The dual-core system runs an embedded Linux™ SMP operating system and includes a library which provides full control and supervision of the display and driver board. The PLUTO-2.1 provides access through Serial and Ethernet-over- USB2 (RNDIS) interfaces and can be programmed using standard Ubuntu™ cross compile GCC toolchain.

The standard PLUTO displays show a reflectivity of approx. 65%-95% (dependent on version) and diffraction efficiencies of more than 80%.

Versions

Besides the standard PLUTO-VIS and PLUTO-NIR versions there are special high retardation versions available (-HR versions) which show a considerably higher phase retardation compared to the standard panels, which enables more stable addressing or mod 4π respectively mod 6π phase functions to be addressed. This can be beneficial for wave front functions as this enables higher slopes and can reduce transition points in the addressed function compared to mod 2π encoding.

The pulse code modulation for digitally addressed devices leads to a slight superimposed phase flicker. For some applications a stable phase response is required. This can be accomplished driving the high retardation panels with low voltage settings for 2π phase retardation, however compromising the response time.

Some PLUTO SLM display versions are equipped with a dielectric mirror coating to increase the reflectivity to >90%. Due to the increased reflectivity less absorption occurs and these display versions can be used with higher incident laser power compared to the standard versions.

PLUTO-2.1 Spatial Light Modulator Wavelength Ranges

PLUTO-2.1 Spatial Light Modulator Kit – Contents:

PLUTO-2.1 SLM – Scope of Supply

Software Features

The PLUTO-2.1 phase only modulator devices can simply be addressed like an external monitor using the standard DVI / HDMI interface of the graphics card. No additional software or dedicated hardware is needed to operate the SLM.

The device is delivered with a Configuration Manager Software. The Configuration Manager can be used to change geometrical settings, brightness, contrast and the electrooptical response by applying a new gamma curve or another digital drive scheme. For these advanced calibrations the device uses an USB connection to a virtual COM port of the computer.

In addition a HOLOEYE SLM Pattern Generator software is provided with the SLM:

Besides that a special SLM Slideshow Player software comes with the device. Also an SLM Display SDK is available for download which provides APIs (Application Programming Interface) for different programming languages to show images and data/ phase arrays directly on a HOLOEYE Spatial Light Modulator:

CAD Files & Drawings

PLUTO-2.1 CAD File

CAD drawing of PLUTO-2.1 SLM

PLUTO-2.1 CAD File (curved flex cable)

CAD drawing of PLUTO-2.1 SLM with curved flex cable

PLUTO-2.1 Display

CAD file of PLUTO-2.1 display part

PLUTO-2.1 Device Drawing

Drawing of PLUTO-2.1 Spatial Light Modulator (PDF)

PLUTO-2.1 Display Drawing

Drawing of PLUTO-2.1 SLM display (PDF)

Papers & References

HOLOEYE’s Spatial Light Modulators are used in research in various fields of applications. In our publication library you find an extensive selection of links to publications and research papers.

PLUTO / PLUTO-2 Spatial Light Modulators
Authors:Fucheng Zou, Dechun Liu, Le Wang, Shengmei Zhao, and Jialong Zhu

Dynamic Micro-Vibration Monitoring Based on Fractional Optical Vortex

Applications: Higher Order Modes / Optical Vortex / OAM
PLUTO / PLUTO-2 Spatial Light Modulators
Authors:Nima Asoudegi and Mo Mojahedi

Orbital Angular Momentum Holography Using Neural Network and Camera in the Loop

Applications: Deep Learning / Neuronal Network,Higher Order Modes / Optical Vortex / OAM,Optical Communication
PLUTO / PLUTO-2 Spatial Light Modulators
Authors:Youngrok Kim, Dong-Woo Seo, Chihyun In and Sung-Wook Min

Phase-assisted camera-in-the-loop hologram optimization with Fourier aperture function constraint

Applications: Digital-/ Computer Holography/ CGH
PLUTO / PLUTO-2 Spatial Light Modulators
Authors:Farhana Firdous and Ravi Kadlimatti

Generation Techniques of Orbital Angular Momentum Beams for Wireless Communication Applications

Applications: Higher Order Modes / Optical Vortex / OAM
PLUTO / PLUTO-2 Spatial Light Modulators
Authors:Joseph Meyer, Yuval Reches, Georgi Gary Rozenman, Yaron Oz, Haim Suchowski and Ady Arie

Analogy of free-space quantum key distribution using spatial modes of light: scaling up the distance and the dimensionality

Applications: Optical Communication,Optical Computing / Quantum Optics
PLUTO / PLUTO-2 Spatial Light Modulators
Authors:Carlos Vargas-Castrillón, Alejandro Velez-Zea, and John Fredy Barrera-Ramírez

Intensity equivalence between free-space propagation and a single-lens processor: application to adjustable magnification in hologram reconstruction

Applications: Adaptive Optics / Wavefront Control,Digital-/ Computer Holography/ CGH,Imaging/ Image Processing

Downloads

Brochure Spatial Light Modulators

Overview about HOLOEYE SLM Products and accessories.

Application Note SLM

Extensive Spatial Light Modulators Application Note