Articles

Divergent‐ray projection method for measuring the flapping angle, lag angle, and torsional angle of a bumblebee wing

[+] Author Affiliations
Lijiang Zeng

Research Development Corporation of Japan Kawachi Millibioflight Project Exploratory Research for Advanced Technology Pilot Laboratory 5-9-1 Tokodai Tsukuba 300-26, Japan

Hirokazu Matsumoto

National Research Laboratory of Metrology 1-1-4 Umezono Tsukuba 305, Japan

Keiji Kawachi

University of Tokyo Research Center for Advanced Science and Technology 4-6-1 Komaba Meguro, Tokyo 153, Japan

Opt. Eng. 35(11), 3135-3139 (Nov 01, 1996). doi:10.1117/1.601053
History: Received Mar. 21, 1996; Revised June 7, 1996; Accepted June 7, 1996
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Abstract

A divergent‐ray projection (DRP) method was developed for measuring the flapping angle, lag angle, and torsional angle of a bumblebee wing during beating motion. This new method can measure the spatial coordinates of an insect wing by digitizing the images that are projected by two divergent laser rays from different directions. The advantage of the DRP method is its ability to measure those three angles simultaneously using only one high‐speed camera. The resolution of the DRP method can be changed easily by adjusting system parameters to meet the needs of different types of objects. The measurement results for these angles of a bumblebee wing prove the effectiveness of the DRP method in studying the flight performance of insects. © 1996 Society of Photo−Optical Instrumentation Engineers.

Topics

Cameras ; Lasers

Citation

Lijiang Zeng ; Hirokazu Matsumoto and Keiji Kawachi
"Divergent‐ray projection method for measuring the flapping angle, lag angle, and torsional angle of a bumblebee wing", Opt. Eng. 35(11), 3135-3139 (Nov 01, 1996). ; http://dx.doi.org/10.1117/1.601053


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