HEIDELBERG HRA 2, Operation Manual

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3 Installation and Safety Information
3.1 Components of the Instrument
The HRA2 system applies to the applicable standards of IEC 60601-1, IEC 60601-1-2, UL2601,
and IEC 60825.
The basic components of the Heidelberg Retina Angiograph 2 are the:
•
Laser scanning camera
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Camera mount with headrest
•
Touch panel
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Power supply with Laser module
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Computer
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Isolation Transformer
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Operation software.
The laser scanning camera is the core of the Heidelberg Retina Angiograph 2. It contains the
three-dimensional scanning system, the detector and the main part of the electronics. The solid
state 488nm laser source is located in the laser module and is coupled to the camera via an optical
fiber. The diode lasers for infrared and indocyanine green angiography are located in the laser
scanning camera. The scanning laser beam emerges from the objective on the front of the camera.
The intensity of the emitted fluorescent light is also measured through this objective.
The laser scanning camera is mounted on a special camera mount which also contains the head-
rest for the patient. The camera mount is designed so that the measuring position on the ocular
fundus can be selected by rotating the camera around two orthogonal axes.
The control panel is used to control image acquisition. Here, the basic image acquisition parame-
ters such as angiography type, laser intensity, detector sensitivity, size of the scanning field and
position of the focal plane are specified. The image acquisition itself is initiated from the control
panel.
The laser module contains one solid state laser. The laser light is transmitted into the laser scan-
ning camera via one fiber optic. The laser scanning camera contains two diode lasers.
The power supply supplies voltage to the laser scanning camera. The on/off switch is located on
the front panel. With the switch in position O, the power supply is turned off.
The Heidelberg Retina Angiograph 2 is operated by a PC-compatible personal computer in com-
bibnation with a IEC 60601-1 proven isolation transformer. The computer receives the image data
generated by the laser scanning camera and performs the entire image analysis. For this purpose,
special hardware is installed in the computer in addition to the Heidelberg Retina Angiograph 2
operation software.
The operation software includes functions to communicate with the user, to control image acqui-
sition, to store images and data, to process and analyze the acquired images, and to document the
examination results.