Photography without lenses |
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| Authors: | A J Durelli V J Parks L Ferrer |
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| Institution: | 1. Mechanics Department, Catholic University, Washington, D. C.
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| Abstract: | Good photographic records fo brittle coating, photoelasticity and moiré patterns can be obtained in certain cases by direct contact of the specimen and the photographic film. No lenses are required. Several examples of application of the technique are given. The method is particularly useful when brittle coating or moiré are applied to transparent curved developable surfaces. |
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