- Control software / LabView drivers
- User defined delay patterns
- Scan rate phase-locked to external source
- Linear and calibrated scaling due to position measurement
The scanDelay USB is a device for introducing a well-defined linear translation and positioning of an optical element, e.g. in interferometers, pump-probe configurations, correlators, or fast scan modules.
The heart of the A·P·E optical delay line series scanDelay USB is a special linear translation stage that is supplied together with appropriate control and drive electronics. The linear drive has been designed especially for optical applications. It combines low moving mass with compactness, reaching a high speed, as well as high precision and resolution. Because of spring bearings the movement is frictionless.
Thus scanDelay USB is capable of generating fast wide scans as well as smallest delays without any stick-slip effects. The actual position is measured in real time by an analog photo-electric system with high resolution and wide dynamic range.
The linear drive allows precise predictions of the scanner movement and leads to an excellent scan-to-scan reproducibility.
The control electronics contain the motor driver and a quartz stabilized signal synthesizer. It can be synchronized with an external clock for a precise, phase-locked scanner movement. A software user interface allows easy control and setup of the scanner. A set of LabView drivers allows an easy integration into existing measurement software. The scanDelay USB can be operated over a wide range of scanning frequencies with various scan modi, the motor driving force can be sinusoidal, triangular, sawtooth-like, or even of a user defined shape. The scanner movement will respond to this within the physical limitations imposed by a harmonic system.
|Scan range||15 ps
(± 1.125 mm)
(± 3.75 mm)
(± 11.25 mm)
|Internal generator1)||0.1 … 20 Hz||0.1 … 20 Hz||0.1 … 10 Hz|
|Externally triggered1)||0.01 … 20 Hz||0.01 … 20 Hz||0.01 … 10 Hz|
|External trigger input||TTL, 20 Hz … < 50 kHz2)|
|Position output signal||± 10 V / 15 ps3)||± 10 V / 50 ps3)||± 10 V / 150 ps3)|
|Trigger output (programmable position)||TTL|
|Linearity of position signal||< 0.5 %|
|Coating of the retroreflector||protected Ag|
|Optics (high precision retro reflector)|
1) Internal position sampling and indication of amplitude (maximum delay) in Control Software from 0.4 … 20 Hz only.
Below 0.4 Hz scan frequency, only partial (smaller than maximum delay) scan position is displayed.
Full position information is available via analog position output signal.
2) fast frequency divider for approx. 80 MHz input optional
3) x10, x100 switchable