Endoscopic inspection using a panoramic annular lens

Donald R. Matthys; John A. Gilbert; Joseph T. Puliparambil

doi:10.1117/12.57466

1 December 1991 Endoscopic inspection using a panoramic annular lens

Donald R. Matthys, John A. Gilbert, Joseph T. Puliparambil

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.57466
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Endoscopy is a technique for imaging the inner part of a volume or cavity. Such techniques have applications in many areas, such as medicine, civil engineering, and aerospace; indeed, anywhere tubes and pipes are involved. The present paper discusses a method of endoscopy which utilizes a unique panoramic annular lens to obtain a flat two-dimensional annular image of the 360 degree surround of the optical system. Although the distortions involved in the optical mapping to produce such an image are not very severe, and the images can be interpreted by inspection, computer algorithms are introduced to linearize the images so as to simplify their interpretation.

Citation Download Citation

Donald R. Matthys, John A. Gilbert, and Joseph T. Puliparambil "Endoscopic inspection using a panoramic annular lens", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57466

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