1. Low-Cost Fundus Camera
Subject Matter Expert Review

2. Project Background
A fundus camera is used to photograph the retina to provide information about a patient's eye.
Diabetic retinopathy is a complication associated with diabetes, eventually leading to blindness.
Most people will only see a specialist after damage to the retina has occurred
Used exclusively in an Opthamologist's office
With proper care, patients with retinopathy can reduce their risk of blindness by 95%.
Typically very expensive and heavy
[Ask audience about having any corrective lenses] We are project 16590, the Low Cost Fundus Camera and I am Casey Petzel, the EDGE lead. A fundus camera is typically a medical imaging device to used diagnose diabetic retinopathy, a disease that can cause blindness if not caught early enough. This poses a problem because symptoms are typically noticed after the retina is damaged then where a patient would see an Ophthalmologist. These devices are normally stationary, heavy and mydriadic, a chemical dilation of the eye; something that many people like to stray away from.
After looking at current commercial products and taking aim at the goals of our customer, we have developed what we would like to correct for our fundus camera.

3. Problem Statement
Due to the need for pupil dilation, specialized camera equipment, staff, and facilities, diabetic patients often do not receive regular screenings.
By creating a low-cost, portable, and easy to use fundus camera, screening for retinopathy in diabetic patients can be performed by a general practitioner.
Our goal is to create a light, portable and affordable Fundus camera to be used by a General Practitioner, or trained individual. It is important that this does not use chemicals to dilate the retina. This camera would screen the patient for retinopathy, and should anything look peculiar, the screener would recommend going to an ophthalmologist for an official diagnosis.

4. Functional Decomposition
Image Eye
Save Picture
Stabilize
Attach Camera
Alignment IR
Set Up Mount
Capture Image
Rest Face

5. Concept Generation - Selection Criteria
Low Cost
Safe
Portable
Easy to Use
Secure
Quality
Achievable within our MSD time frame

6. ODROID-XU4

7. See3cam_CU40 Camera
Takes images and video in both IR and visible light.
Sensor details:
OV4682 RGB IR
4MP
USB 3.0
10 pin GPIO header
Interchangeable/Removal Lens
5V Vin

8. Illumination and Flash
Currently have board containing LED and IRED lighting
Infrared lighting required to align camera with pupil avoiding dilation
Axial lighting

9. Meeting with Ted Kinsman
Find the focus point of our lenses
Most our lenses are condenser lenses
Everything must be aligned & correct lens direction
Consider an Acromat lens (Chromatic aberrations)
Consider using a condenser lens in front of the macro lens
Rolling shutter vs. Global shutter
40 mm. macro lens for increased FOV.

10. Action Items from Ted Get the model eye from Christye
Download optical design software
Take focal length measurements and determine field of views
Machine stands so they all rest at the same height
Ask Christye if there are any cameras we can tear apart

11. Optical Structure - Status
Began searching for different optical design software
Contacted three possible companies
Trace Pro
OSLO (Optics Software for Layout and Optimization) EDU

12. OSLO EDU

13. Optical Prototyping

14. Meeting with Bob Kremens
Discussed sensor selection.
Things to look out for:
Dead pixels
Dark spots (power drop-off)
Effective resolution - circular image on rectangular sensor
Bending
IR Reflectivity
Autofocus?
Suggestions
edmonds.com
Circular illumination - guide with lens

15. Sensor - Status, a first look

16. Sensor - Status right now

17. Housing Design

18. Controls
X and Z axis are controlled using a joystick for fine movements and a loose base for large movements.
Y axis is controlled using a screw and scissor lift system.

19. Further Mechanical Design
Add system to keep camera aligned
Add system to attach lower base to the rest of the device
Add systems to increase portability
Design Outer Casing

20. Risk Management ODROID shipping - want it for winter break
Illumination
Flash

21. 3-Week Schedule Task Assigned To Due Date
Go over design review notes, create new action items if necessary
Team
11/19/2015
Set up flash/illumination system
Matt/Casey
12/1/2015
Begin designing in OSLO software
Kelly
12/3/2015
Determine material cost for mechanical system
Ryan
Create overall budget sheet
12/8/2015
Load OS and boot loader to ODRIOD
Cecelia
TBD
Put out any purchase requests required for MSD 2
12/10/2015
Gate review
12/11/2015
Go over gate review notes