OverDrive Plus (ODP)

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OverDrive Plus (ODP)

OverDrive Plus (ODP) is a new technology transferred from Boulder Nonlinear Systems (BNS) to Meadowlark Optics exclusively for our reflective Spatial Light Modulators (SLMs). When enabling ODP on our SLMs, the phase transition time between consecutive holograms is greatly reduced. The use of ODP has shown reductions of 2 – 8x from the standard optical response times. This response time reduction comes from the combination of three separate technology developments integrated together into a single product: Transient Nematic Effects, Phase Wrapping and Regional Look‐up‐tables.

 
Transient Nematic Effects
The base technology is the transient nematic effect, utilizing intermediate transition voltages beyond the target voltage needed to achieve the desired phase value. This “OverDrive” bypasses the traditional
exponential rates of nematic liquid crystals.
 

  • Significantly faster response times via transient nematic effect, phase wrapping, and regional calibrations.
  • Ability to enable/disable ODP via software.
  • Utilizes GPU via OpenCL to reduce the time to calculate intermediate holograms.
  • Ability to pre‐calculate intermediate holograms for faster frame rates.
  • Regional calibration routines for 256 x 256 and 512 x 512 pixel SLMs enabling pixel‐level LUTS and calibration data.

Pixel Pitch

Specifications - OverDrive Plus Spatial Light Modulator
Design Wavelength λ = 1064 nm
Array Size 7.68 x 7.68 mm
Zero-Order Diffraction Efficiency (Standard) 61.5% (maximum)
External Window BBAR coated for Ravg < 1.25%
Fill Factor 0.834
Format 512 x 512 (262,144 active pixels)
Phase Stroke (Double Pass)
Pixel Pitch 15 x 15 μm
Phase Ripple
As low as 0.1%, based on SLM
configuration
Reflected Wavefront Distortion (Calibrated) λ/10 @ 1064 nm
Liquid Crystal Response Time, 10‐90% (Standard) ≤ 66.7 ms 
Liquid Crystal Response Time, 10‐90% (High-Speed) ≤ 10 ms 
Liquid Crystal Response Time, 10‐90% (OverDrive Plus) ≤ 1 ‐ 4 ms 
 

 

 

For ordering information, please contact  Sales at 303.833.4333 or sales@meadowlark.com