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 “small” format 512×512 SLM is an excellent entry-level device that offers a good efficiency and speed with full phase modulation (0-2π). This SLM is ideal for applications where stability is important but high efficiency and high optical switching speeds aren’t required.

 

Download the datasheet

 

Unique Features:

  • 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