Multipass V-shaped system with a large relative aperture: stages of development

Area of Science:

• Optics
• Spectroscopy
• Analytical Chemistry

Background:

• Optical multipass systems are crucial for enhancing light-matter interactions in analytical instrumentation.
• Traditional designs, like the White system, have limitations in aperture and specific applications.
• A 20-year research effort focused on optimizing fixed path length multipass systems.

Purpose of the Study:

• To describe the development and updates of a novel optical multipass system.
• To present an unconventional design achieving a large relative aperture.
• To highlight applications in gas analysis and high-resolution spectroscopy.

Main Methods:

• Step-by-step development and iterative updates of the optical multipass system.
• Design of systems utilizing a base length to focal length ratio of 1.5 (compared to the classical White system's 2).
• Implementation of a six-pass, single-objective configuration.

Main Results:

• Successful development of an optical multipass system with a fixed path length and large relative aperture.
• Demonstration of an unconventional design ratio (1.5f) enabling enhanced performance.
• Adaptation of the system for various gas analytical equipment, including a specific scheme for high-resolution spectroscopy (f-number 3.7).

Conclusions:

• The developed optical multipass system offers a viable alternative to classical designs, providing a large relative aperture.
• The unconventional design parameters are effective for enhancing system performance.
• The system shows significant potential for advanced gas analysis and high-resolution spectroscopic applications.