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A new ultrasonic lens |
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| Authors: | J Szilard M Kidger |
| Institution: | Loughborough University of Technology, Loughborough, Leicestershire, UK Optical Design Group, Physics Department, Imperial College, London, UK |
| Abstract: | There is an increasing need for good ultrasonic lenses in nondestructive testing, medical diagnostics and short range underwater applications. The difficulties encountered are material problems in nature; optical design techniques are well developed. A symmetrical doublet has been designed with an aperture of F 1 and with aberrations much less than λ/4 at 2 MHz. The calculated resolution is 4λ per line pair. Details of the construction and the first test results, which agree well with predictions, are reported. |
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