Tweez 200si System
Aresis
Advanced Research Instrumentation Solutions
1. Technical leadership
Key technical parameters
 Resolution and accuracy
 Uniformity (of intensity / trap stiffness)
 Linearity (of AOD response)
 System stability
 Speed (ghost trap elimination)
Resolution and accuracy - definition
Resolution:
Accuracy:
how precisely we can regulate relative
distance between two traps (1 and 2)
1
2
Δ
how precisely we can hold the trap in
one position
1
1
δ = δ(t)
Resolution – Tweez 200si performance
Trap positioning resolution in Tweez 200si is < 0.001 nm - well below the
detection limit of particle’s position resolution.
Relative distance between two
traps of which one is sine
modulated with amplitude 100 nm
and frequency 1Hz.
Power spectrum of mean square
displacement between the two
traps.
Accuracy – managing thermal drift
Positions of trap 1 (at X1) and
trap 2 (at X2) are slowly drifting
(~4 nm/min).
Relative distance of trap 1 (at X1)
and trap 2 (at X2) remains stable
with time (~0.05 nm/min).
Uniformity (of intensity / trap stiffness)
How uniform is the trap stiffness over the working field?
Deviation of the AOD response reduced from ~30% to below 1%.
Linearity (of AOD response)
How linear is the trap stiffness with respect to AOD RF driving power?
Deviation from linearity of the AOD response is reduced to below 1%.
Stability and speed
1. Managing positional noise
Tweez 200si technological solution
High stability RF generator
High-stability time base (10-6 ppm)
Mechanical stability
-Thermal drift
Optical design (short optical path and
geometry of the set-up)
-Acoustic noise
Mechanical design (compact, single
block machined aluminum construction)
Pointing stability of laser
Fiber laser
2. Managing intensity noise
Tweez 200si technological solution
Amplitude stability of laser
Active laser power stabilization
(<0,1%)
3. Managing speed
Tweez 200si technological solution
High trap-to-trap switching
frequency
Up to 100 kHz via digital signal
processing (DSP) and field
programmable gate array (FPGA)
hardware + prevention of ghosting
Ghost-trap elimination
How effectively are the ghost traps eliminated at high trap-to-trap switching rates?
Tweez 200si system
Ghost traps are reduced from relative intensity of 25% to below 0.1%.
2. Integrated design
Integrated design of Tweez 200si system
Tweez 200si Optical Unit (TOU)
Tweez 200si Control Unit (TCU)
Tweez 200si IR Laser Unit (TILU)
Tweez 200si mounted on Nikon Eclipse TE 2000 with TIRF module installed.
Tweez 200si TCU and TILU
TCU
TILU
Size of both units mounted on each other: 430 mm x 300 mm
TCU connected to PC via USB
TCU connected to TOU via RF and control cables
TILU connected to TOU via optical fiber
Tweez 200si TOU
Features of TOU
Tweez 200si Benefits
Optical module made from a solid block of
a high quality machined aluminium
Stability and low mechanical noise
Completely closed system
No cleaning of optics required
No (re)alignment of optics required
Compatibility with other microscope addons
Enhancing versatility of applications
Tweez 200si mounts directly on a microscope body
Slika Stran 2 v prospektu levo spoda,
Lahko še slika, ki pokaže, kako je TWEEZ
povezan z Nikonom
Key benefits:

Complete turn-key system

Compatible with Nikon microscope add-ons (TIRF, confocal, etc.)

Ports to other Nikon modules remain open
Intuitive and powerful Tweez 200si software
Features of Tweez 200si software
Tweez 200si benefits
Easy-to-use interface
Effective control over trapping patterns
- easy manual manipulation of optical traps
- easy automatization
Open architecture
Full control by a third party
Tweez 200si can be controlled via TCP by userwritten control software => tailoring to demands of
a particular experiment
Tweez 200si advanced manipulation features


extended trapping patterns in the form of:

point traps – single diffraction limited laser spot,

complex traps – user defined pattern of laser spots.
trap automation in the form of:

manual traps – moved and adjusted manually (mouse control),

automated traps – trap is moved (rotated/scaled if it is a complex trap)
automatically on a user defined path.
Tweez 200si control window example
4 Examples of software use (movie)
Screen shot shows three traps. Trap 1 is a complex trap (green square pattern) periodically moved,
scaled and rotated on a circular path. Traps 2 and 3 are manual traps moved with mouse cursor.
3. Customer support
Customer support
- Technical consulting (choice of microscope components, e.g. objective etc.)
- Training
- E-mail hotline (info@aresis.com)
- Remote software and firmware upgrades
- 1 year limited warranty on materials and craftsmanship
- Fast service times