Assistant Service Manual
OPTIKON 2000
Code 121008S 6-1 2009-07-24 Rev. C
6. PRINCIPLES OF OPERATION
6.1 INTRODUCTION
The OPTIKON ASSISTANT is a state of the art system designed for both
cataract extraction and retinal surgery. The use of a multiple microprocessor
architecture combined with some Large Scale Integration circuits (LSI), allows
concentrating high technology and top performances in a small and compact
unit.
The ASSISTANT integrates the following functions:
• Gravity fed irrigation
• Aspiration through peristaltic and Venturi pumps, with a safe
ACS
3
closed system vacuum reading and anterior chamber stabilizer
• Electronic programmable I.V. pole
• Bipolar diathermy coagulator
• Phacoemulsifier
• Anterior and posterior pneumatic vitrectomy section
• Fiber optic endo-illumination
•
Silicone oil and air tamponade
(Refer to the ASSISTANT Block Diagram) The heart of the ASSISTANT is
the Control Board 393200: it receives input from the user through the GUI
(Graphic User Interface) and footswitch, which is directly wired to the
microprocessor. The same processor then controls all the output peripherals,
such as pinch valves, aspiration pumps, electronic I.V. pole, etc. The U/S Driver
is one of the peripherals of the Control board: it is the one that interfaces the
phaco and diathermy handpieces.
This kind of design minimizes physical wiring and connections replacing
them with the more reliable and flexible logical connections (i.e. the first switch
in the footswitch opens the irrigation valve, but there is no physical link between
the switch and the valve, they are both wired to the microprocessor. There is a
logical link established by the software). In simple words, all digital and
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