Abstract
Using reflective multiple-fold approach can reduce bulk and weight compared with large high-quality optical systems and improved resolution and light collection compared with miniature conventional systems. Air-spaced concentric multi-reflection (ACMR) systems, where two reflective surfaces surround a hollow cavity, are useful for extended focal distance, achromatic aberration, useful for inexpensive, lightweight IR imagers and may lead to convenient designs for broadband or dual-band imagers. Design a camera, which spectral response 2⿿12μm, with a total thickness of 30mm, 130mm effective focal length, ±4.2° FOV, 0.022mrad resolution and 68mm effective aperture, 96mm outer aperture. Application can fit into the hull or wing of a micro-UAV aircraft, which weight and thickness are tightly constrained, for long range surveillance.
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