LETO Phase Only Spatial Light Modulator (Reflective)




LETO Spatial Light Modulator – Microdisplay Features
Display Type: Reflective LCOS (Phase Only)
Resolution: 1920 x 1080
Pixel Pitch: 6.4 µm
Fill Factor: 93 %
Active Area / Diagonal 12.5 x 7.1 mm (0.55″ Diagonal)
Addressing 8 Bit (256 Grey Levels)
Signal Formats HDMI – HDTV Resolution
Input Frame Rate 60 Hz / 180 Hz

The LETO phase modulator is based on a reflective LCOS microdisplay with full HD (1920 x 1080 pixel ) resolution. With a pixel pitch of only 6.4 µm and a small interpixel gap of 0.2 µm the LETO SLM provides a high fill factor of 93% and thereby a high light efficiency.

The LETO Spatial Light Modulator is usable for the 400-1100 nm range and the modulator provides a phase shift of 2 π up to 850 nm. The device is delivered with a linear 256-level phase response for the specified user wavelength. The adaptation of the device settings for different operating wavelengths to a linear 2 π phase response can be done by straight forward gamma correction using the supplied calibration software.

The device can work at 180 Hz in color-field-sequential (CFS) mode e.g. for operation with color-switchable RGB Laser (different pulse-code programming / calibration is necessary).

The LETO Spatial Light Modulator offers a reflectivity of ~ 75%. Due to the optimized design of the LCOS microdisplay the LETO SLM shows low cross talk between the pixels resulting in high effective spatial resolution. The device offers diffraction efficiencies of more than 80% (16 level blazed grating) which leads to a total light efficiency of ~ 60%.

Special Features:
- Reflective LCOS Microdisplay - Phase Only Modulation
- Small Interpixel Gaps - 6.4 µm Small Pixel Pitch

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

LETO Spatial Light Modulator Kit – Contents:

leto_slm_deliverables

LETO Spatial Light Modulator – Scope of Supply
LETO SLM Driver Box
Phase Only Display incl. Flex Cable (1920 x 1080 Pixel)
HDMI-cable & DVI/HDMI-cable
USB Cable
Power Supply
Operating Instruction / Manual
Data Medium (CD or USB Flash Drive) with Manual, Calibration Software and Application Software

LETO Phase Modulator – Software Features:

LETO Configuration ManagerThe LETO phase only modulator devices can simply be addressed like an external monitor using the standard HDMI interface of the graphics card. No additional software or dedicated hardware is needed to operate the SLM.

For advanced callibration the LETO device uses a convenient standard USB interface and a SLM Configuration Manager software. The software can be used to change the electrooptical response by applying a new gamma curve (to configure the device for use at a specific wavelength).

Besides that, a HOLOEYE SLM Pattern Generator software is provided with the device. Key features of which are:

  • Computation of computer generated holograms (CGH) from user defined images
  • generation of SLM signals representing basic optical functions such as lenses, gratings, axicon and vortex functions
  • superposition of CGH’s with basic optical functions to combine functionalities
LETO Software Features
SLM Configuration Manager Icon SLM Configuration Manager Brightness / Contrast / Geometry / Gamma Control
SLM Pattern Generator Icon SLM Pattern Generator Basic DOE computations; Generation of optical functions (Circular Aperture, Fresnel Zone Lens, Axicon, Single and Double Slit …); Gratings (incl. Blazed and Sinusoidal), superposition of functions (e.g. prisms, Zernike polynomials…)
SLM Slideshow Player Icon SLM Slideshow Player Plays slideshow of user defined precalculated functions or images

Driver Dimensions (Unit: mm):

LETO Spatial Light Modulator Driver Poportions

Display Dimensions (Unit: mm):

LETO Spatial Light Modulator Microdisplay Dimensions

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