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

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.

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.

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

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

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

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

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

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.)

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

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