Ferroelectric Liquid Crystal Devices

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Ferroelectric Liquid Crystal Devices

Meadowlark Optics’ Ferroelectric Liquid Crystal (FLC) devices offer a significant performance advantage in optical shutter and rotator applications demanding the fastest optical response times available. FLC devices are designed for applications requiring active timing control of beam transmittance. Key features of our FLC devices include high-speed binary operation, high purity linear polarized output, and maximum extinction ratio performance. Since these devices are solid state – undesirable mechanical motion, associated noise, and vibration problems are eliminated. Our FLC devices require a DC-balanced AC drive signal, typically resulting in a 50% duty cycle operation. Our optional FC 5010 Controller is ideal for driving the devices for optimal performance (sold separately).
 
FLC Controller (FCS010)
The FCS010 is a two-channel liquid crystal controller specifically designed to drive our ferroelectric liquid crystal shutters and rotators.
 
The FCS010 has two short-circuit protected output channels driven 180 degrees out of phase. The pre-configured controller waveforms are optimized for FLC devices. We can tailor the waveform to your specific needs based on application and purchased FLC device. The drive waveform is output through SMA connectors.
 
The controller is 100% RoHS compliant and is powered by a separate 12V international power supply.

 

  • Mounted and unmounted design options
  • Extremely fast switching speeds
  • Silent, vibration-free
  • Low-voltage operation
  • OEM sizes and shapes
  • No mechanical motion
  • Stand alone controller available
  • Optimized waveforms for driving FLC devices

Specifications - FLC Rotator
Retarder Material Ferroelectric liquid crystal
Substrate Material Fused silica
Wavelength Range 405-850 nm
custom ranges up to 2 microns
Transmitted Wavelength Distortion
λ/4 (P-V @ 633)
[λ/10 (RMS @ 633)]
[< λ/5 (RMS @ 633 nm)]
Surface Quality 60-40 scratch dig
Beam Deviation ≤ 5 arc min
Outside Diameter (mounted) 1.00 / 2.00 ± 0.005 in.
please inquire about custom sizes
Clear Aperture 0.37 / .70 in.
Response Time (10-90% & 90-10%) ≤ 100 micro-sec at room temp
wavelength dependent
Operating Temperature 20°C to 30°C
Storage Temperature 0°C to 60°C
Driver Requirements ± 5 to 30 Volts, 50% duty cycle
Capacitance Less than 20 nF at 1 kHz, typical
(Depending on center wavelength)
 

Specifications - FLC Shutter
(rotator with polarizers – includes specifications from above table)
Polarizer Material Dichroic Polymer
Transmission ≥ 30% (typical - unpolarized light)
≥ 65% (typical - polarized light)
Wavelength Range 450-720 nm
custom ranges up to 2 microns
Transmitted Wavefront Distortion λ/2 (P-V @ 633)
[λ/8 (RMS @ 633)]
Contrast Ratio ≥ 200:1
 

Specifications - FLC Controller
Dimensions 5.3 in. W x 5.3 in. L x 2.0 in. H
(13.5 cm W x 13.5 cm L x 5.1 cm H)
Number of LC Channels Two, running identical programs 180
degrees out of phase
Output Waveform Bipolar ± 15V peak voltage,
± 10V holding voltage
Amplitude Resolution 16-bit; 1 mV voltage resolution
Internal Drive 1 to 10,000 Hz, 50% duty cycle, frequency
controlled by front-panel
10-turn knob
 

 

Ordering Information - FLC Devices
Product Description Diameter (in.) Clear Aperture (in.) Thickness (in.) Part Number
Rotator 1.00 [25.4 mm]
2.00 [50.8 mm]
0.37 [9.4 mm]
0.70 [17.78 mm]
1.23 [31.24 mm]
0.75 [19.05 mm]
FPR – 100 – λ
FPR – 200 – λ
Shutter 1.00 [25.4 mm]
2.00 [50.8 mm]
0.37 [9.4 mm]
0.70 [17.78 mm]
1.42 [36.07 mm]
1.13 [28.7 mm]
FCS – 100 – λ
FCS – 200 – λ
Controller N/A N/A N/A FCS010
Please specify a wavelength when placing your order