A U.S. patent has been granted to Advanced PrecisionTechnologies for a miniature fingerprint sensor using atrapezoidal prism and a holographic optical element. "Basically what we've come up with is a ...
A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...
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