Spatial Light Modulator

Spatial Light Modulator

Keywords: Spatial Light Modulator, SLM, light modulation, phase modulation,

A Spatial Light Modulator (SLM) is an electrically programmable device that modulates light according to a fixed spatial (pixel) pattern. SLM are typically used to control incident light in amplitude, phase, or the combination of both.

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. SLMs are typically used to control incident light in amplitude, phase, or the combination of both.

SLM Device Construction

Several parameters help define SLM characteristics. Pixel pitch is defined as the center-to-center spacing between adjacent pixels. Interpixel gap describes the edge-to-edge spacing between adjacent pixels.

Polarized light enters the device from the top, passes through the cover glass, transparent electrode and liquid crystal layer, is reflected off the aluminum pixel electrodes, and returns on the same path. Drive signals travel through the pins on the bottom of the pin-grid array package, through the bond wires, and into the silicon die circuitry. The voltage induced on each electrode (pixel) produces an electric field between that electrode and the transparent electrode on the cover glass. This field produces a change in the optical properties of the LC layer. Because each pixel is independently controlled, a phase pattern may be generated by loading different voltages onto each pixel.

Why choose our Reflective SLMs ?

High Voltage Backplanes = Fastest Response Times

Our SLMs use custom backplanes, and proprietary drive schemes to achieve response times down to 1 ms (wavelength dependent). Most other liquid crystal spatial light modulators utilize display backplanes built with standard Nematic liquid crystal, limiting response time to >30 ms.

Highest Phase Stability Commercially Available –Our backplanes are custom designed to allow high refresh rates (up to 6 kHz), and direct analog drive schemes. Refreshing the voltage at the pixel at rates far surpassing the response time of the liquid crystal ensures high temporal phase stability. Further, use of direct analog drive schemes, as opposed to digital dithering, reduces optical flicker as low as 0.1% (0.001 π radians). Low Inter-pixel Cross Talk - Our backplanes are custom designed to offer high voltage at the pixel (5 – 12 V), and a large pixel pitch. Further, our SLMs are built with Meadowlark Optics proprietary liquid crystal which minimizes the required thickness of the LC layer in the SLM. By maximizing the ratio of pixel pitch to LC thickness we are able to offer SLMs with minimal inter-pixel effects.

Broad Wavelength Capabilities - We are the only SLM supplier capable of offering SLMs designed for use from UV (>365 nm) up to the LWIR (8 - 12 µm). Analog is Better - All the SLMs have been designed for phase modulation. Unlike many display LCoS backplanes which require a pulse width modulation (PWM) scheme, our backplanes utilize analog voltages at each pixel. This results in a very stable phase response over time.

High Bit Depth Controllers - we offer 8, 12, and 16-bit controllers to provide the most linear resolvable phase levels commercially available (up to 500). Fast transfer speeds from the computer to the SLM are offered up to 2 kHz.

Overview

Polarized light enters the device from the top, passes through the cover glass, transparent electrode and liquid crystal layer, is reflected off the aluminum pixel electrodes, and returns on the same path. Drive signals travel through. There are 2 types of special light modulators: reflective analog SLMs and transmissive SLMs.

Reflective Analog SLMs: All of our liquid crystal on silicon (LCoS) backplanes incorporate analog data addressing with high refresh rates to provide the lowest phase ripple SLMs available. User’s can select standard or high speed liquid crystal for optimal performance. Liquid cooling systems are available to remove heat via the back of the SLM chip in order to maximize optical power handling capabilities:

Transmissive SLMs: All of our liquid crystal on glass (LCoG) SLMs enable simple optical systems when low pixel counts are sufficient. Users can select single-mask or configurations for phase or amplitude modulation, or a dual-mask configuration for combined phase and amplitude modulation.

1. Reflective Analog Spatial Light Modulators (SLMs)

1.1 Spatial Light Modulator –1024 x 1024

High Speed Analog –up to 1 kHz

Our Liquid Crystal on Silicon (LCoS) Spatial Light Modulators (SLMs) are uniquely designed for pure phase applications and incorporate analog data addressing with high refresh rates. This combination provides users with the fastest response times with high phase stability. The 1024 x 1024 SLM is good for applications requiring high speed, high diffraction efficiency, low phase ripple and high-power lasers. 

High Speed with High Phase Stability -Great care was taken in the design of the 1024 x 1024 silicon backplane to enable high speed operation while simultaneously maximizing phase stability. Engineers successfully achieved high speed without compromising phase stability. 

The 1024 x 1024 SLM is incredibly fast with liquid crystal response times ranging from 0.9 to 8 ms (wavelength dependent) for a full wave of modulation when running in typical room temperature environments. 

SLM Features:

  • High resolution

  • High speed

  • High Phase Stability

  • Pure analog phase control

  • High first order efficiency

  • High reflectivity

  • High power handling

  • On-board Memory

  • Wavelengths from 488-1650 nm

 Software Features:

  • Input and Output Triggers

  • Image Generation

  • Automated Sequencing

  • Wavefront Calibration

  • Global and Regional Look Up Tables

  • Temperature Monitoring

 Diffraction Efficiency (0th-order)

This is the amount of light measured in the 0th-order (dc) when the SLM is written with various solid gray levels as a percentage of the amount of light measured when the SLM is replaced with a reference mirror. Therefore, it takes into account losses in transmission through the coatings on the SLM cover window, as well as diffraction losses due to the pixel pads being less than 100% fill-factor. In addition to these losses, this measurement also accounts for losses due to imperfect reflectivity of the aluminum pixel mirrors, or in the case of a dielectric mirror coated model the measurement accounts for losses due to imperfect reflectivity of this dielectric mirror coating. The 0th-order diffraction efficiency will vary as a function of wavelength due to differences in coating materials and designs. It will also vary with pixel value due to the inherent change in the index of refraction of the liquid crystal that results in a change in the Fresnel reflections inside the liquid crystal cell. Most standard SLMs will range from 70 –90%, while the dielectric mirror coated models will range from 92 –98%. 

High Efficiency Dielectric Mirror Coating

All the light reflecting off the SLM is modulated –including the light between the aluminum pixel electrodes. The reflective pixel structure associated with a LCoS SLM backplane acts as an amplitude grating diffracts some light into higher orders. Optically, the active area of the backplane is converted into a flat dielectric mirror by depositing dielectric layers to eliminate the amplitude and optical path variations associated with the underlying aluminum pixel structure. The dielectric stack is kept thin to minimize any drop in electric field across the LC layer as shown in the figure below. In other words, there are no abrupt changes in phase modulation (such as dead zones) between pixels due to the smoothing which results from separating the LC modulator from the driving electrodes. 

Diffraction Efficiency (1st-order)

This is the percentage of light measured in the 1st-order when writing a linear repeating phase ramp to the SLM as compared to the light in the 0thorder when no pattern is written to the SLM. 1st-order diffraction efficiency varies as a function of the number of phase levels, or pixels, in the phase ramp. Example measurement data taken at various wavelengths is shown below for phase ramps with 2 to 8 phase levels between 0 and 2π.

High Phase Stability –Making an LCOS SLM faster usually means the phase stability becomes worse. However, we’ve combined our traditional analog drive scheme with some new proprietary technologies to suppress phase instabilities to an unprecedented 0.05 –1.0% without compromising the speed. If your application requires extremely low phase ripple, please contact our engineer for more information on the 19x12 SLM. Phase ripple is quantified by measuring the variation in intensity of the 1storder diffracted spot as compared to the mean intensity while writing a blazed phase grating to the SLM. Since phase stability varies as a function of pixel voltage, this measurement approach is an average and does not represent all scenarios. 

Software -Our SLMs are supplied with a graphical user interface and software development kits that support LabVIEW, Matlab, Python, and C++. The software allows the user to generate images, to correct aberrations, to calibrate the global and/or regional optical response over ‘n’ waves of modulation, to sequence at a user defined frame rate, and to monitor the SLM temperature.

Global or Regional Calibrations -Regional calibrations provide the highest spatial phase fidelity commercially available by regionally characterizing the phase response to voltage and calibrating on a pixel-by-pixel basis.

Image Generation Capabilities

  • Bessel Beams: Spiral Phase, Fork, Concentric Rings, Axicons

  • Lens Functions: Cylindrical, Spherical

  • Gratings: Blazed, Sinusoid

  • Diffraction Patterns: Stripes, Checkerboard, Solid, Random Phase

  • Holograms, Zernike Polynomials, Superimpose Images

1024 x 1024 Analog Spatial Light Modulator Specifications

  • Resolution: 1024 x 1024

  • Array Size: 17.40 x 17.40 mm

  • Zero-Order Diffraction Efficiency: 75 -87%

  • Fill Factor: 97.2%

  • Pixel Pitch: 17 x 17 μm

  • With Dielectric Mirror Coating: 92 –98% 

Standard calibration   wavelength

Liquid crystal response   time/system frame rate

Calibrated wavefront   distortion

AR coating range   400-800nm

AR coating range   500-1200nm

AR coating range   850-1650nm

532   nm

≤   1.0 ms / ≥ 1000.0 Hz

≤   1.4 ms / ≥ 714.3 Hz

λ/5

635   nm

≤   1.3 ms / ≥ 769.2 Hz

≤   1.8 ms / ≥ 555.6 Hz

λ/6

785   nm

≤   1.8 ms / ≥ 555.6 Hz

≤   2.4 ms / ≥ 416.7 Hz

λ/7

1064   nm

≤   3.4 ms / ≥ 294.1 Hz

≤   5.5 ms / ≥ 181.8 Hz

λ/10

1550   nm

≤   8.0 ms / ≥ 125.0

λ/12

Part number

STM-HSP1K-488-800-PC8

STM-HSP1K-500-1200-PC8

STM-HSP1K-850-2650-PC8


Hardware Interface -The 1024 x 1024 SLM system includes a Gen3 x8 PCIe controller with input and output triggers and low latency image transfers. Triggering can be performed on SLM chip refresh period boundaries of 696 μs, or even in the middle of refresh periods for applications requiring the SLM be tightly synchronized to external hardware. The controller also includes 752 frames of internal memory that can be loaded in advance, then sequenced at full speed in order to minimize traffic on the PCIe bus during operation.

1.2 Spatial Light Modulator  – 1920 x 1200

E - Series:   Educational, Economical & Entry - level

We are pleased to introduce our latest E - Series Spatial Light Modulator (SLM) . Don’t let the name fool you ; with improved specifications over our previous model, it is anything but entry - level . It is, however, economical and ideally suited for educational labs with a limited budget . Liquid Crystal on Silicon ( LCoS ) Spatial Light Modulators (SLMs) are uniquely designed for pure phase applications and incorporate analog data addressing with high refresh rates . This combination provides users with the fastest response times and highest phase stabilities commercially available . We offer both transmissive and reflective SLMs in either one - or two - dimensions . Phase - only SLMs can also be used for amplitude - only or a combination of both.

SLM spatial light modulator

SLM Features:

  • High resolution

  • High phase stability

  • Pure analog phase control

  • High first order efficiency

  • High reflectivity

  • High power handling

  • Compact design

  • Wavelengths from 400–1650 nm

Software Features

  • Output triggers

  • Image generation

  • Automated sequencing

  • Wavefront calibration

  • Global  and regional look up tables

High Phase Stability – We are known for having the fastest SLMs with the least amount of phase ripple on the market . Our backplanes are custom designed with high refresh rates and direct analog drive schemes, resulting in phase ripple for standard products ranging between 0.10 - 0.30% . For customers who require even better performance, customization is possible with phase ripple as low as 0.025% ( 0.0008 π radians) . Phase ripple is quantified by measuring the variation in intensity of the 1 st order diffracted spot as compared to the mean intensity while writing a blazed phase grating to the SLM.

SLM spatial light modulator

Hardware Interface Options - The 1920 x 1200 SLM is offered with a 60 Hz HDMI Controller enabling customers to take advantage of our fast liquid crystal response times.  Standard hardware includes output trigger for synchronization.

Diffraction Efficiency (1st - order) - This is the percentage of light measured in the 1st - order when writing a linear repeating phase ramp to the SLM as compared to the light in the 0th order when no pattern is written to the SLM. Diffraction efficiency varies as a function of the number of phase levels in the phase ramp. The plot to the right shows sample 1 st order diffraction efficiency measurements, as a function of the phase ramp period, taken at various wavelengths.

SLM spatial light modulator SLM spatial light modulator

Global or Regional Calibrations - Regional calibrations provide the highest spatial phase fidelity commercially available by regionally characterizing the phase response to voltage and calibrating on a pixel-by-pixel basis.

Image Generation Capabilities

  • Bessel Beams: Spiral Phase, Fork, Concentric Rings, Axicons

  • Lens Functions : Cylindrical, Spherical

  • Gratings : Blazed, Sinusoid

  • Diffraction Patterns : Stripes, Checkerboard, Solid, Random Phase, Holograms, Zernike Polynomials, Superimpose Images

SLM spatial light modulator

Standard Speed System -Standard Liquid Crystal with HDMI Controller

SLM spatial light modulator

2. Transmissive Spatial Light Modulators 

All of our liquid crystal on glass (LCoG) SLMs enable simple optical systems when low pixel counts are sufficient. Users can select single-mask or configurations for phase or amplitude modulation, or a dual-mask configuration for combined phase and amplitude modulation.

2.1 1x128 Linear Array Spatial Light Modulator

The linear SLM has a linear pixel array geometry. This system can be used to alter the temporal profile of femtosecond light pulses via computer control. Applications requiring these short pulses include analysis and quantum control of chemical events, optical communication and biomedical imaging. This linear SLM offers high fill factor, good transmitted wavefront distortion, and options for single or dual-plane for modulating phase, amplitude, or both simultaneously. These SLMs find use in other applications including Hadamard spectroscopy, optical data storage and wavefront compensation.

Pixel formatResponse timePixel pitchEfficiencyFill factorActive area (mm)
1x12835 – 70 ms100 um85 – 92%98.0%12.80 x 5.00
Hex1  mm》90%
93.112.00Ø

2.2 Spatial Light Modulator Controller

Our 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 inpidual 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.

Key Features

  • High transmission

  • Compact optical housing design

  • Computer controlled

  • Phase or amplitude modulation

Optical head specifications
Retarder materialNematic liquid crystal
Substrate materialOptically quality synthetic fused silica
Center wavelength450-1800nm (specify)
Modulation range
Phase (min) amplitude1λ 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 nominal incidence
Dimension7.00 x 2.96 x 0.74 in
Recommended safe operating limit500W/cm², CW

300mJ/cm², 10ns, 532nm

Temperature range10 - 45 °C
Controller specifications
Output voltage2kHz ac square wave digitally adjustable
0-10 Vrms
Voltage resolution2.44mV (12 bit)
Computer interfaceUSB
Power requirements100 – 240VAC @ 47-63Hz, 1A
Dimensions9.50 x 6.25 x 1.50 in
Weight2 lbs.
Note that the D31258 in included with the purchase of the SLM system
Ordering information
NamePixel geometryVersionPart number
1 x 12898 μm x 4 mm linearPhaseSSP – 128P - λ
AmplitudeSSP – 128A - λ
Hexagonal 1271 mm across flatPhaseHex – 127P - λ
AmplitudeHex – 127A - λ
Please specify your operating wavelength λ in nm when ordering. Custom SLM sizes and formats are available
Optional polarizers
TypeWavelength range (nm)Part number
Visible450 - 700SDP – VIS
Near infrared 1775 – 890SDP – IR1

3. Optics Kit

Includes optics & mounts for simple phase or amplitude experiments. Available pre-aligned and ready to use over 405 - 1550 nm. Available with optional camera and laser.

Spend your time on important research rather than designing an optical system for your SLM.  The SLM Optics Kit provides you with a set of optics and cage-mount components enabling the user to start research with the SLM system immediately.  The kit includes a Half-Wave Retarder, a pair of Linear Polarizers, lenses, and all necessary mount hardware, including a custom adapter plate to quickly align the SLM system to the optics in an off-axis configuration.  Optional items are also available including a laser, beam expander optics, and a camera.  This approach provides optimum efficiency with minimal design effort.

Optics Kit includes:

  • Polarizers and waveplates

  • Beam expander

  • Lenses

  • Tip/tilt stage

  • Base plate and posts

  • Laser and camera (optional)

4. 1-Photon SLM Microscopy Kit

The 1-Photon SLM Microscopy Kit is a scan-less SLM-based epi-fluorescence upright microscope that enables three dimensional calcium imaging and/or photoactivation of neurons in brain slices. The microscope can be used to excite and monitor activity of neuronal ensembles, enabling studies of neuronal circuit activity both in vitro and in vivo. Add-on to existing microscope or use as stand-alone microscope.

KEY FEATURES

  • Scan-less SLM-based

  • Fully functional programmable excitation system

  • Brightfield and/or Epifluorescence microscope

  • 3D calcium imaging capability

  • Point and click software to define excitation patterns

5. Optical Tweezers Cube

Our cube provides researchers with a portable, stand-alone, optical tweezers system just one cubic foot in size. This compact instrument allows a user to optically trap and thus physically manipulate hundreds of microscopic objects in three dimensions (3D) using computer control to set and move each optical trap independently.

Optical trapping can be used to manipulate objects ranging in size from 10’s of nanometers to 10’s of microns and objects with a variety of material characteristics. Trapping examples include cellular organisms, dielectric spheres, metallic spheres, metallic nanoshells, carbon nanotubes, air bubbles, and even water droplets in air.

One application of the CUBE includes biological research. This tool enables measurements of cell properties and controlled studies of how cells interact with foreign objects. Another application example is trapping metallic objects and carbon nanotubes for engineering materials with unique thermal and electrical properties.

KEY FEATURES

  • Complete optical trapping system

  • 3D particle manipulation using holographic beam control

  • 100’s of traps (demonstrated 400)

  • High temporal trap stability

  • Spatially uniform trapping across 200x200 micron field of view

Application Notes: 3D Mapping of Neural Circuits In Vivo Opens the Window on Neurological Disease

SBN Series Liquid Crystal Spatial Light Modulators

Our spatial light modulator (SLM) is based on reflective liquid crystal on silicon (LCOS) micro-display technology. The SLMs enable optical phase modulation freely and generate arbitrary 2D phase patterns on a LCOS pixel-by-pixel basis. SBN-RD series are our latest Full-HD LCOS model. The SLMs are suitable for various scientific and industrial applications, including beam shaping, wavefront correction and optical manipulations.

Applications:

  • HUD

  • Micro-projection

  • Holographic imaging

  • Optical communication

  • Optical forceps

  • Light field regulation

  • Adaptive optics

  • Beam shaping

  • Laser processing 

Product model naming rules:

Serial Number - Modulation Type - modulation Mode - Resolution - Pixel Size - Window - Optional wavelength - Others

For example: SBNA-PP2K-6355-NIR-H, SBNA series, Phase modulation, analog control, resolution 1920*1080, pixel 6.3m, window 0.55, wavelength NIR-H 1064nm (high power version) 

Serial number

Modulation type

Modulation mode

Resolution

Pixel size

Window size

Optional wavelength

SBNA

SBNB

SBNC

SBNE

A=Amplitude

P=Phase

P=Analog

D=Digital

4K=4090*2160

4K2=3840*2160

2K=1920*1080

1K=1280*720

36=3.6mm

38=3.8mm

45=4.5mm

60=6.0mm

63=6.3mm

80=8,0mm

26=0.26”

39=0.39”

52=0.52”

55=0.55”

62=0.62”

69=0.69”

70=0.70”

72=0.72”

78=0.78”

VIS=430nm-750nm

NIR=1000nm-1100nm

TEC=1530nm-1565nm

Specific wavelength, such as 1064nm

1. SBN series digital silicon - based liquid crystal (LCoS) high - resolution spatial light modulator

This series of spatial light modulators (SLMS) are a high-resolution version of digital silicon based liquid crystals (LCoS). It provides up to 4160×2460 resolution and allows dynamic adjustment of modulation region, so it is suitable for multi - mode or single - mode high - resolution optical system applications. 

Features/Advantages:

  • Easily calibrated

  • Digital drive, flexible modulation

  • Easy to use, plug and play

  • Good linearity of amplitude/phase gray curve

  • High resolution, high phase accuracy and good phase stability 

Serial number

Modulation type

Modulation mode

Resolution

Pixel size

Window size

Operating   wavelength

SBNA

A=Amplitude

P=Phase

D=Digital

4K=4096*2160

38=3.8mm

70=0.7”

VIS=430nm-750nm

NIR=1000nm-1100nm

TEC=1530nm-1565nm

SBNB

A=Amplitude

P=Phase

D=Digital

4K2=3840*2160

36=3.6mm

62=0.62”

VIS=430nm-750nm

NIR=1000nm-1100nm

TEC=1530nm-1565nm

SBNC

A=Amplitude

P=Phase

D=Digital

4K=3840*2160

45=4.5mm

78=0.78”

VIS=430nm-750nm

NIR=1000nm-1100nm

TEC=1530nm-1565nm

2. SBN series analog silicon - based liquid crystal LCoS spatial light modulator

This series of spatial light modulators (SLMS) are a high refresh rate version of analog silicon based liquid crystals (LCoS). It allows dynamic adjustment of the modulation region and is suitable for multimode or single-mode high resolution optical system applications. Its ability to accurately control wavefront phase is applicable to various applications of optical field modulation. 

Features/Advantages:

  • Analog drive

  • Low power consumption

  • High contrast

  • High refresh rate 

Serial number

Modulation type

Modulation mode

Resolution

Pixel size

Window size

Operating   wavelength

SBNB

SBNC

A=Amplitude

P=Analog

2K=1920*1080

45=4.5mm

39=0.39”

VIS=430nm-750nm

NIR=1000nm-1100nm

SBNC

A=Amplitude

P=Analog

1K=1280*720

45=4.5mm

26=0.26”

VIS=430nm-750nm

NIR=1000nm-1100nm

SBNC

A=Amplitude P=Phase

P=Analog

2K=1920*1080

60=6mm

52=0.52”

VIS=430nm-750nm

NIR=1000nm-1100nm

TEC=1530nm-1565nm

3. SBN series analog silicon - based liquid crystal LCoS spatial light modulator

This series of spatial light modulators (SLMS) simulate regular versions of silicon-based liquid crystals (LCoS). It has the advantages of high phase stability, good phase gray linearity and high reliability, so it is suitable for various application fields of optical field modulation. 

Features/Advantages:

  • Analog drive

  • Phase stability

  • Good phase linearity

  • Low power consumption 

Serial number

Modulation type

Modulation mode

Resolution

Pixel size

Window size

Optional wavelength

SBNB

A=Amplitude

P=Phase

P=Analog

2K=1920*1080

63=6.3mm

55=0.55”

VIS=430nm-750nm

TEC=1525nm-1572nm

SBNA

A=Amplitude

P=Phase

P=Analog

2K=1920*1080

80=8mm

72=0.72”

VIS=430nm-750nm

NIR=450nm-10640nm

NIR-H=1064nm(High power version)

TEC=1525nm-1572nm

SBNC

A=Amplitude

P=Phase

P=Analog

2K=1920*1080

80=8mm

69=0.69”

VIS=420nm-760nm

TEC=1530nm-1570nm

4.  SBNE series digital silicon - based liquid crystal LCoS spatial light modulator

SBNE series spatial light modulator (SLM) is a product mainly developed for teaching and research in universities. It is the regular version of digital silicon based liquid crystal (LCoS). The control signal from processor to each pixel is in digital form, without digital to analog conversion. Its driving system is simple and compact, and the anti-noise performance is outstanding. 

Features/Advantages:

  • Easily calibrated

  • Digital drive, flexible modulation

  • Easy to use, plug and play

  • Good linearity of amplitude/phase gray curve

  • High resolution, high phase accuracy and good phase stability 

Serial number

Modulation type

Modulation mode

Resolution

Pixel size

Window size

Optional wavelength

SBNE

A=Amplitude

P=Phase

D=Digital

2K=1920*1080

63=6.3mm

55=0.55”

VIS=430nm-750nm

NIR=450nm-10640nm

TEC=1525nm-1572nm

5. SBN-RD3 Series Spatial Light Modulators

 

Features:

  • WUXGA (1920 x 1200) and Full-HD (1920 x 1080) available

  • Frame rate (60Hz or 120Hz)

  • Memory function

  • Triggers-input & output

Applications:

  • Beam steering

  • Wavefront correction

  • Pulse/Beam shaping

  • Diffractive optics

  • Optical manipulation

  • Programmable phase pattern

Technical Specifications:

Item

min

max

Units

Notes

Operating wavelength range

450

1064

nm

(Refer to AR coating option)

Panel size

(H)15.36 x (V)9.60

mm

Active area

Pixel resolution

(H)1920    x (V)1200

pixel


Pixel size/pitch

8.0

µm


Panel reflectivity

Typ.>80

%

Depending on specified wavelength range

Aperture ratio

95

%


Gray level

10(1024)

bit


Frame rate

60 or 120

Hz

Factory default setting

Phase depth

rad.


Phase stability

Typ. <0.001π

rad.


Response time

Typ. 300

ms


Interface

HDMI

-

10-bit using RGB 8-bit, 3 colors

Operating temperature range

15

35

degC

No condensation

Storage temperature

0

40

degC

No condensation

Optical power handling

Typ.10

W/cm2

@1064nm, CW, 2.0mm beam diameter

Dimensions

122.6x92.4x25.6

mm


Control software

GUI software and SDK for Windows

-


  • The value is not guaranteed. Please contact us for technical support.

AR-coating Options:

Item

Parameter

Units

Ordering   code number

-01

-02

-03

-12

-14

-

AR   coating range

450-550

750-850

1000-1100

400-700

450-550/1500-1600

nm

AR   coating reflectance

<0.5

<1.5

<0.6

%

  • Angle of incidence = 0 degree

  • Typical laser wavelength 532nm, 630nm, 850nm, 1064nm and wide spectrum 405-1100nm available.

SFG Series Digital Micromirror Spatial Light Modulators

We are mainly engaged in the application technology research and development of digital micromirror spatial light modulator (Digital Micromirror Device-DMD). It is a high-tech enterprise specializing in the research and development, production and sales of hardware and software in digital light process (DLP) related fields such as semiconductor maskless lithography, computational imaging, compressed sensing and 3D detection. Our products include SFG-F3010, SFG-F4100, SFG-F4200, SFG-F4500, SFG-F4710, SFG-F4320, SFG-F6500, F SFG-9000, etc., widely used in scientific research, 3D scanning and LDI industries.

The company has been composed of young and middle-aged technical backbone R & D team, can be said to provide customers with DLP scheme design, DMD drive control system design and other services. At the heart of the digital micromirror spatial light modulator is the digital Micromirror device (DMD), an optical semiconductor module and a MEMS chip in which each lens can be deflected ±10deg, ±12deg or ±17deg respectively, around the hinged shaft. The DMD chip mainly regulates the rotation Angle of each micromirror on the chip according to different digital signals transmitted by the front-end circuit to the CMOS chip, so that the light irradiated on the micromirror can be selectively reflected to the imaging surface for imaging. Since the deflection of the lens is controlled separately by the underlying CMOS control circuit and the binary information of the reset signal of the lens, the optical field digital flower modulation can be realized. Because DMD is reflected by aluminized micromirror, almost no energy absorption, and controlled by CMOS technology, the speed, accuracy, energy and efficiency of light modulation are far more than other spatial light modulators. DMD technology is widely used, including spectral analysis, maskless lithography, 3D measurement, naked eye 3D display, holographic imaging, compressed sensing, biological microscopy, SLA 3D printing, machine vision, etc.

Operation Principle of Digital Micromirror Devices:

At heart of the Digital Micromirror spatial light modulator is the Digital Micromirror device (DMD), an optical semiconductor module and a MEMS chip in which each lens can be deflected ±10°, ±12°, or ±17.5°, respectively, around the articulated shaft. The DMD chip mainly regulates the rotation Angle of each micro mirror on the chip according to different digital signals transmitted by the front-end circuit of the CMOS chip, so that the light shin on the micro mirror can be selectively reflected on the imaging surface for imaging. Since the deflection of the lens is controlled solely by the underlying CMOS control circuit and the binary information of the lens reset signal, the digital modulation of the optical field can be realized. Because DMD is reflected by aluminized micro mirror, almost no energy absorption , and controlled by CMOS technology, the speed, accuracy, energy and efficiency of light modulation is far higher than other space light modulators. DMD technology is widely used, including spectral analysis, maskless lithography, 3D measurement, naked eye 3D display, holographic imaging, compressed sensing, biological microscopy, SLA 3D printing, machine vision, etc.

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