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ATLAS Model 9000
General Information
Confidential and Proprietary
63041A0208
1-11
Service Manual
1.7.2 Tower
Module
The tower module contains the Optics Head Assembly, TFT display/backlight inverter, and
joystick. Please note that the Optics Head Assembly Components are detailed for functional
description only.
1.7.2.1
Optics Head Assembly
None of the internal components of this assembly are Field replaceable. If any are found to
be defective, replace the entire Optics assembly as detailed in Section 3.
The optics head assembly consists of 4 major subsystems:
•
Camera
The camera is a monochrome 1280x1024 CMOS camera with USB 2.0 interface. Frame rate is
15 FPS at 1280x1024 and 30 FPS at 640x480. Since the camera uses a USB interface, a frame
grabber is not needed. The camera gets its power directly from the USB bus (500mA max).
The CMOS sensor is a ½” format, 6.6mm x 5.3mm array, with 5.2um square pixels.
•
Placido Ring Illumination PCBA
Placido Illumination is the source. The Placido ring illumination uses 950nm high power IR
LEDs. The drive circuit controls 256 LEDs at 50mA max current. The LEDs are spaced for
illumination uniformity. The LEDs are controlled by the Computer board through the Logic
PCBA connection. The LEDs can be turned on and off by the Computer.
The Placido illumination PCBA also provides circuits to drive the iris illumination LED and the
fixation LED.
•
Iris Illumination
The iris (live eye) illumination uses one high power IR LED. The assembly is physically
connected to the Placido illumination PCBA and controlled with the Logic PCBA. The Logic
board can turn the LEDs on and off.
•
Fixation Illumination
The patient fixates on the fixation illumination target during the examination. The system
uses a 583nm (peak wavelength) LED with a 60 degree viewing angle. The assembly is
physically connected to the Placido illumination PCBA. It is always on when the system is
powered up.
Summary of Contents for ATLAS 9000
Page 4: ......
Page 49: ...Diagrams ATLAS Model 9000 Confidential and Proprietary Service Manual 6 2 63041A0208 Notes...
Page 51: ...FIGURE 6 2 ATLAS Model 9000 System Wiring Diagram...
Page 53: ...Parts ATLAS Model 9000 Confidential and Proprietary Service Manual 7 2 63041A0208 Notes...
Page 76: ...Appendix A ATLAS Model 9000 Confidential and Proprietary Service Manual A 4 63041A0208...
Page 112: ...Appendix D ATLAS Model 9000 Confidential and Proprietary Service Manual D 2 63041A0208...
Page 114: ...Appendix E ATLAS Model 9000 Confidential and Proprietary Service Manual E 2 63041A0208...
Page 116: ...Appendix F ATLAS Model 9000 Confidential and Proprietary Service Manual F 2 63041A0208...