A spatial light modulator (SLM) is an electrically programmable device that modulates light according to a fixed spatial (pixel) pattern. SLMs have an expanding role in several optical areas where light control on a pixel-by-pixel basis is critical for optimum system performance.

All of our 512×512 format SLMs operate with a unique high speed backplane which refreshes each pixel at a rate of 6kHz. This is critical in maintaining high temporal stability, represented as phase ripple across the SLM and stability in the reflected image.

The high speed, high efficiency “small” format 512×512 is a device that draws a balance of resolution, great optical switching speed and high efficiency. The dielectric mirror coating and high speed liquid crystal make the most of the incident light and allow users to drive their applications with efficiency and precision.

 

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Unique Features:

  • High speed liquid crystal for higher optical switching speeds
  • High efficiency dielectric coating for higher optical efficiency
  • Small pixel pitch for excellent optical steering
  • High backplane refresh rate for exceptionally low ripple
  • Broad operating wavelength with user applicable calibration
  • Available with 16-bit DVI or 8-bit PCIe controller
Array size7.68 x 7.68 mm
Zero-order diffraction efficiency61.5% (maximum)
(Models P512 & HSP512)
90 - 95% (maximum)
(Models PDM512 & HSPDM512)
Duty cycleUp to 100%
External windowBroadband antireflection coated for Ravg <1% over operating wavelengthrange, standard range includes 450-865, 600-1300, 865-1650 nm
Fill factor83.4%
(Model P512)
100%
(Model PDM512)
Format512 x 512 (262,144 active pixels)
ModeReflective
ModulationControllable index of refraction
Phase stroke (double pass)Typically 2π at user-specified laser line (π to 6π upon request)
Contrast ratio (if used in Amplitude Mode)200:1
Pixel pitch15 x 15 μm
Spatial resolution (maximum)33 lp/mm
Reflected wavefront distortion - RMS (P512)λ/3 @ 532 nmλ/4 @ 635 nmλ/5 @ 785 nmλ/6 @ 1064 nmλ/8 @ 1550 nm
Reflected wavefront distortion - RMS (typical) with software compensation over the circular areaλ/7 @ 532 nmλ/8 @ 635 nmλ/10 @ 785 nmλ/10 @ 1064 nmλ/12 @ 1550 nm
Liquid crystal response time / Switching frequency (P512)≤ 33.3 ms / ≥ 30 Hz≤ 33.3 ms / ≥ 30 Hz≤ 55.5 ms / ≥ 18 Hz≤ 66.7 ms / ≥ 15 Hz≤ 100 ms / ≥ 10 Hz
Liquid crystal response time / Switching frequency (Model HSP512)≤ 7 ms / ≥ 142 Hz≤ 12 ms / ≥ 83 Hz≤ 17.2 ms / ≥ 58 Hz≤ 10 ms / ≥ 100 Hz≤ 20 ms / ≥ 50 Hz
Liquid crystal response time / Switching frequency (Model HSPDM512)≤ 10 ms / ≥ 100 Hz≤ 16.7 ms / ≥ 60 Hz≤ 22.2 ms / ≥ 45 Hz≤ 16.7 ms / ≥ 60 Hz≤ 28.5 ms / ≥ 35 Hz
Wavelength range515 - 585 nm615 - 700 nm760 - 865 nm1030 - 1170 nm1505 - 1650 nm