Design considerations for an infrared flying-spot telescope

Area of Science:

• Remote Sensing
• Optical Engineering

Background:

• Passive infrared (IR) line-scanning radiometers provide image data.
• Image interpretability can be limited by a lack of motion context.

Purpose of the Study:

• To enhance image interpretability by integrating motion sensing with passive IR line-scanning radiometry.
• To evaluate the optimal wavelength and system features for this combined device.

Main Methods:

• Development of a device combining passive IR line-scanning radiometry and motion sensing.
• Analysis of wavelength selection criteria, including laser availability, receiver techniques, and atmospheric penetration.
• Simplified estimation of laser power based on area scan rate.

Main Results:

• The 10.6-micrometer wavelength is identified as the preferred choice.
• Advantages of the 10.6-micrometer wavelength include the availability of high-power, high-efficiency continuous-wave (cw) lasers, coherent receiver techniques, and effective haze/fog penetration.
• A method for estimating laser power was developed, with area scan rate as a key factor.

Conclusions:

• The integration of motion sensing significantly enhances the interpretability of images generated by passive IR line-scanning radiometers.
• The 10.6-micrometer wavelength offers distinct advantages for this application, facilitating robust system design and performance.
• The proposed laser power estimation method provides a simplified approach for system design.