PLUTO - 2.1 Phase Only LCOS SLM
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- Model: HOLOEYE PLUTO - 2.1
PLUTO-2.1 Phase Only LCOS SLM
Microdisplay Features 
- Display Type: Reflective LCOS (Phase Only)
- Dielectric mirror coated versions available
- Resolution: 1920 x 1080
- Pixel Pitch: 8 µm
- Input Frame rate: 60 Hz
- 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
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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. 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). 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%. |
Applications
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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.
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.
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