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Instec's Automatic Liquid Crystal Testing System (ALCT-EO1) provides a full range of liquid crystal electro-optic property measurements including transmittance-voltage, curve and optical switching time for both positive and negative anisotropic nematic liquid crystal materials.
The ALCT-EO1 is compatible with all Instec LC cells, holders, optical accessories, and temperature control sample stages.
ALCT-EO1
PRODUCT INQUIRY -
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MEASUREMENTS
VT Curve
Measure light transmission at different voltage amplitudes, V10-V90
Switching Time
Measure response time of sample following voltage modulation
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SYSTEM COMPONENTS
ALCT-EO1 controller
Digital-to-analog converter: 16 bit DA converter, 500KHz sample rate, supports both standard and user defined signal waveforms
Analog-to-digital converter: 16 bit AD converter, 2MHz sample rate
Light measuring devices
PD04: fast photo detector with large dynamic measurment range
Light sources
H-150: light source with halogen lamp
S-3000 (optional): LED light source
S-5000 (optional): High power LED light source
Software
WinLC2: Configuration and control of the ALCT-EO1 controller, including definition and management of measurement sequences, evaluation and representation of measurement results
InstecApp (optional): temperature control with programmable command sequences
Temperature control (optional)
TS102LC1: Thermoelectric Cooler based temperature control device, temperature range -30 °C to +120 °C
MK2000: 0.01°C precision temperature controller
Porlarizer (optional)
Option A: contrast ratio > 2000:1 at 540 - 630 nm
Option B: contrast ratio > 300:1 at 540 - 630 nm
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DESCRIPTION
The basic system consists of the following:
ALCT-EO1 mechanism
Photo detector PD04
ALCT-EO1 Controller
Adjustable Light source H-150
Light shielding cover (Optional upgrade to rigid darkbox)
LCH Liquid crystal holder with electrical contacts
Light polarizer/ analyzer (Optional)
Software: WinLC2, InstecApp(optional)
Temperature control system (optional)
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TECHNICAL DATA
Output&Input
Output Wave
DC to 2KHz, Voltage 0 to ±10V (optional ±95V)
Output Update Rate
500KHz
Output Resolution
16bit
Input Resolution
16bit
Input Sample Rate
2MHz
Output Wave
DC to 2KHz, Voltage 0 to ±10V (optional ±95V)
Output Update Rate
500KHz
Output Resolution
16bit
Photo Detector
Photo Gain
x1, x10, x100, x1K, x10K, x100K, x1M, x10M
Dark Voltage
< 5mV (x1 - x100K)
Dark Noise
< 5mV
Response Time
20us (x1)
Contrast Ratio Without Polarizer
1.6x106
Contrast Ratio With Polarizer (option A)
2000:1 (540 - 630nm)
Contrast Ratio With Polarizer (option B)
300:1 (540 - 630nm)
Measurement Range
V10
0.5 -8V, ±10mV
V50
0.5 -8V, ±10mV
V90
0.5 -10V, ±10mV
Switching Time
0.1ms -10s