Design, simulation, and construction of an illumination unit for non-contact dermatoscopy

Inhaltsverzeichnis (Table of Contents)

• Abstract
• 1 Introduction
• 2 State of the Art
• 3 Design and Construction of the Illumination Unit
• 3.1 Introduction
• 3.2 Reflector Design
• 3.2.1 Reflector Measurement with Goniophotometer
• 3.2.2 Simulation of the Reflector in Zemax
• 3.3 Lens System Design
• 3.3.1 Lens System Design and Optimization in Zemax
• 3.3.2 Homogeneity of the Illumination
• 3.4 Automatic Focus and Analyzer Adjustment
• 3.4.1 Automatic Focus
• 3.4.2 Automatic Analyzer Adjustment
• 3.5 Camera System Characterization
• 3.5.1 Modulation Transfer Function (MTF) Measurement
• 3.5.2 Resolution Test with USAF-1951 Test Chart
• 3.6 Integration of the System
• 3.6.1 Swivel Arm
• 3.6.2 Software Development in LabVIEW
• 4 Discussion
• 5 Conclusion
• 6 References

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This Master's thesis focuses on the development and construction of a new prototype for non-contact dermatoscopy, building upon an existing device. The main objective is to improve the performance, usability, and automation of the system for improved skin cancer detection and analysis.

• Development of a new illumination unit with enhanced brightness and homogeneity
• Optimization of the lens system and reflector design using simulation software
• Implementation of automatic focus and analyzer adjustment for ease of use
• Characterization of the camera system for resolution and performance evaluation
• Integration of the components into a compact and user-friendly system

Zusammenfassung der Kapitel (Chapter Summaries)

• Chapter 1: Introduction This chapter provides an overview of the background and motivation for the project, highlighting the importance of non-contact dermatoscopy for early skin cancer detection. It introduces the existing system and its limitations, setting the stage for the development of a new prototype.
• Chapter 2: State of the Art This chapter explores the current technologies and research related to non-contact dermatoscopy, providing a comprehensive review of existing techniques and their advantages and disadvantages. It sets the context for the proposed design and construction of the new illumination unit.
• Chapter 3: Design and Construction of the Illumination Unit This chapter delves into the detailed design and construction process of the new illumination unit. It describes the development of the reflector, lens system, and automatic focus and analyzer adjustment mechanisms. It also discusses the characterization of the camera system and the integration of all components into a functional system.

Schlüsselwörter (Keywords)

Non-contact dermatoscopy, illumination unit, reflector design, lens system optimization, automatic focus, analyzer adjustment, camera system characterization, image processing, skin cancer detection, early diagnosis, medical technology.