A Fresnel Lens Without The Pain
$ 18.99 · 4.9 (365) · In stock
PMMA fresnel lens diameter 110mm focal length 120mm 100mm 70mm 60mm 1000mm for sale - AliExpress
Sub-wavelength lateral detection of tissue-approximating masses using an ultrasonic metamaterial lens
These credit card sized Fresnel lens are easy and convenient to use. They fit in a wallet and are flexible and durable so you can always have it with
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110x80mm Focal Length 130mm PMMA Rectangle Concentric Threaded Fresnel Lens Projector Solar Energy Condenser Focus Lenses - AliExpress