Document Type

Conference Paper

Journal/Book Title/Conference

SPIE Optical Engineering + Applications, 2014

Volume

9219: Infrared Remote Sensing and Instrumentation XXII

Publisher

SPIE - International Society for Optical Engineering

Publication Date

9-12-2014

First Page

1

Last Page

15

Abstract

Hypertemporal imaging enables the long-range characterization of vibration modes and amplitudes of a passively illuminated structure. The vibration signature arises from modulation of the bidirectional reflection distribution function (BRDF) as the surface normal oscillates with respect to a fixed, directional source. This paper considers the instrument design characteristics and environmental factors that limit passive vibrometer performance including BRDF angle sensitivity, receiver spatial resolution, interference from atmospheric scintillation, and intrinsic detector performance. It also identifies a sensor architecture that is capable of characterizing surface vibration at amplitudes below 1 mrad rms and discuss detector technology that can further improve long-range vibrometer sensitivity.

Download

Share

COinS