Hex and Linear Spatial Light Modulators

Meadowlark offers 2 transmissive SLM options, a hexagonal array SLM and a linear array SLM. Both variations come with a controller.

Hex Spatial Light Modulator – These transmissive hexagonal array SLMs are designed for adaptive optics (AO) applications. The two-dimensional array of Liquid Crystal Variable Retarders acts as a real-time programmable phase mask for wavefront correction of a linearly polarized source.
Unwanted aberration effects are removed by introducing the opposite phase shift through the Hex SLM. The most common applications involve high-resolution imaging where viewing through an aberrant medium is unavoidable. Examples include astronomical imaging with ground-based telescopes and medical imaging through body fluids. High-energy laser users also benefit from active phase compensation for beam profile correction.

Linear Array Spatial Light Modulator – The transmissive linear array can be used to alter the temporal profile of femtosecond light pulses via computer control. These SLMs find use in other applications including Hadamard spectroscopy, optical data storage and wavefront compensation.

Spatial Light Modulator Controller
Meadowlark Optics Spatial Light Modulator Controller allows for independent voltage control of up to 128 liquid crystal cells or pixels.

The SLM Controller connects via USB cable to a Windows™-based computer. Supplied software allows for convenient setting of individual pixel retardance and for the programming of retardance profiles across a pixelated device. Custom software can be written using the included LabVIEW™ Virtual Instrument Library to allow for integration into custom applications. The D3128 controller is included with the purchase of the SLM system.

  • High transmission
  • Compact optical housing design
  • Computer-controlled
  • Phase or amplitude modulation

Optional Polarizers are available.

Visible, from 450 – 700 nm (part number SDP – VIS)
Near Infrared, from 775 – 890 nm (part number SDP – IR1)

Transmissive Spatial Light Modulator
Retarder materialNematic liquid crystal
Substrate materialOptical quality synthetic fused silica
Center wavelength450 - 1800 nm (specify)
Phase amplitude (min.)1λ optical path difference
0-100%
Retardance uniformity≤ 2% rms variation over clear aperture
Transmitted wavefront distortion≤ λ/4 (P-V @ 633)
[≤ λ /10 (RMS @ 633)]
Surface quality40 - 20 scratch-dig
Beam deviation≤ 2 arc-min
Transmittance> 90% (without polarizers)
Reflectance (per surface)≤ 0.5% at normal incidence
Dimensions (LxWxH)7.00 x 2.96 x 0.74 in.
Recommended safe operating time500 W/cm2, CW
300 mJ/cm2, 10 ns, 532 nm
Temperature Range10˚C to 45˚C
Controller
Output voltage2 kHz ac square wave digitally adjustable 0-10 V rms
Voltage resolution2.44 mV (12 bit)
Computer interfaceUSB
Power requirements100 - 240 V ac
47 - 63 Hz
1A
Dimensions (LxWxH)9.50 x 6.25 x 1.50 in.
Weight2 lbs
Ordering Information - Transmissive SLM
Name
Pixel width (µm)
Pixel geometryVersionPart number
Linear 1 x 12898 µm x 4mmPhase
Amplitude
SSP-128P-λ
SSP-128A-λ
Hexagonal 1271 mm across flatsPhase
Amplitude
Hex-127P-λ
Hex-127A-λ
Please specify your operating wavelength in nanometers. Custom SLM sizes and formats are available.
Rotary Mount Dimensions
Spatial Light Modulator Interface PixelDrive 3000