1. Low-Cost Fundus Camera
Status Update

2. Software - Status/Plan
Beginning development on external system, will port to ODROID once it is ready.
Architecture designed by Tuesday 2/9 Done.
Cecilia & Casey working on this.
Complete software by 3/11.
Test connection of software with other system components by 3/18.
Port software to ODROID by 4/1.
Bug fix as needed while testing entire system.

3. Hardware - Status/Plan
All ordered hardware is on hand.
ODROID XU-4 not sending HDMI signal to display.
Casey has tested, unsure where the problem originating
Technical Support in Korean
ed Korean speaking students at RIT for translation help, large response
Meeting evening of 2/3 to call technical support and have translation done
Decision on how to proceed by 2/12 at the latest
May have to repurchase from a local distributor as it is out of return period
Plan: Ordering replacement ODROID from american distributor, should have by end of next week 2/19

4. Illumination and Flash
Infrared lighting required to align camera with pupil while avoiding constriction
Beam Splitter to give coaxial light instead of liquid light guide.
Have beam splitters to test with.
Initial tests say it should work, getting data to support.
Shutter w/ LED vs. just LED flash
Chose to use LED flash
See next slide

5. Flash - Shutter Concerns
Shutter speed would need to be variable to control exposure length.
Would be a mechanical system powered by a spring
Many moving parts.
Concern over vibrations impacting focus
Difficult to get consistency in movement of many parts with the software.
Many things need to occur in a specific order over very short time frame
Requires a current draw at least as large as the LED flash would.
Shutter will increase the overall size of the system
Shutter could block fixation points depending where placed.
Shutter requires the IR and LED lights to be positioned in different locations instead of together.

6. Flash - Design Decision
Using an LED for a flash instead of a shutter creates less system complexity/moving parts to coordinate at once if a
Standard LED can not flash fast enough.
Cost difference between different LED’s is relatively more, but compared to system and budget a small cost ($10 vs. 5 cents)

7. Illumination and Flash - Brightness
Use luxmeter to attenuate light intensity to around 1,000 lux (1,000 lumen/m2)
Determined by comparing other FDA-approved fundus cameras
LED output can easily be modulated to keep within specifications.

8. Illumination Pathway
Exact positioning of these items can be determined once the lens are setup.
Goal by 2/26

9. Optics Status/Plan Possess a 20D lens currently
Team feels this is a large part that we all need to work on
Now know illumination pathway. Can work on optics.
Design lens array/verify with Ted Kinsman by 2/26
Build lens setup and verify proper magnification/field of view being obtained by 3/4
Combine system with light/camera by 3/11

10. Mechanical Base Preconstructed Base FDA - approved
provided by Prof. Sisson
FDA - approved
Allows for large and fine movements
Commercially available

11. Mechanical Base Ctd.
Removable base allows the system housing & camera to be mounted and moved closer/further from the eye to ensure proper focus.

12. Mechanical Design - Status/Plan
Design for the removable mount to attach camera to moveable base made.
Needs to be 3D printed.
Industrial Design Student designing external casing to house all components - completed by 3/21

13. Overall Schedule