New UV-A laser-induced fluorescence imaging system for near-field remote sensing of vegetation: characteristics and performance

Malgorzata Sowinska; Bernard Cunin; Francine Heisel; Joseph-Albert Miehe

doi:10.1117/12.351333

28 May 1999 New UV-A laser-induced fluorescence imaging system for near-field remote sensing of vegetation: characteristics and performance

Malgorzata Sowinska, Bernard Cunin, Francine Heisel, Joseph-Albert Miehe

Author Affiliations +

Proceedings Volume 3707, Laser Radar Technology and Applications IV; (1999) https://doi.org/10.1117/12.351333
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

In this paper, a compact, new UV-A laser induced fluorescence imaging system implemented in an all-road car for near-field remote sensing of vegetation will be described. It has been developed as a part of a European Community Program INTERREG II* and is consisting of three main parts: excitation, detection and control units. The excitation light pulses (10 ns) are produced by a frequency tripled Nd:YAG laser emitting at 355 nm with a variable repetition rate up to approximately equals 22 kHz and a pulse energy typically of 40 (mu) J. The laser spot size is adjusted by means of a variable beam expander. Fluorescence images are recorded via entrance lenses and 10 nm bandpass filters with a gated intensified digital CCD camera operating at 50 frames per second. The 'head of the system' (laser and camera) can be directed in site and azimuth, and can be high until a 6 meters height. All the functions like the system positioning, localization and distance detection, spot size adjustment, focus, sharpness, selection of the filter, laser and camera synchronization, gain of the intensifier, real time visualization of images, acquisition time are controlled by a newly developed software which also allows image storage, analysis and treatment. Examples of remote sensing fluorescence images recorded at a distance between 10 and 30 m are presented.

Citation Download Citation

Malgorzata Sowinska, Bernard Cunin, Francine Heisel, and Joseph-Albert Miehe "New UV-A laser-induced fluorescence imaging system for near-field remote sensing of vegetation: characteristics and performance", Proc. SPIE 3707, Laser Radar Technology and Applications IV, (28 May 1999); https://doi.org/10.1117/12.351333

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available