1. Robotics Controlled 3D Photography
Group 32
Alexander Choe
Rohit Mittal
Advisor: Dr. Marc Lin

2. Why 3D photography?
Currently Dr. Marc Lin is working on a research involving thin film of cardiac tissue. In order to study the surface structure of these tissue in details he wants to produce a 3D digital image.

3. Proposal
The goal of this project is to design and build a robotic controlled device that can automatically scan a film of cardiac tissue multiple times at different angles with a conventional bar infrared laser and get a 3D image using the shadow scan technique.

4. What is a Shadow Scan Method?
Scan the surface of an object of interest (ex. With Shadow of a pencil)
Camera captures the refraction and produce a 3D image

5. Problems with Shadow Scan
A typical 3D image captured by shadow scan technique has ‘shadows’
An object must be scanned at different angles to erase these ‘shadows’
Manually performed

6. Objectives Device must be robotically controlled
User must have some control over the device
The device must be able to scan the object at different angles to erase ‘shadows’
The device must be able to scan a cardiac tissue (20 X 20 X 2 mm) with high precision.
Use Conventional infrared Laser

7. Preliminary Design
Involves two motors (in red): rotating table and controlling laser

8. 2-Axis Stepping Motor System
2 Bipolar Chopper Drivers
Power Supply
Terminal Block
2-Axis Stepping Motor Controller Board

9. Past Work
Contacted professionals at other institutes who are familiar with shadow scanning
Obtained few hardware necessary for 3D photography (video card, camera, and etc.)

10. Current Work Developing the design for device
Understanding the circuitry for stepping motor system
Installing hardware (ex. Stepping motor control board)

11. Obstacles to Overcome Budget: approximately $2500 Computer
Software / Program