Tower Optical Corp. (Boynton Beach, FL) has announced the availability of a new series of Zero Order and Multiple Order, Crystal Quartz, waveplates based upon a waveplate diameter of 10mm. The waveplates are offered unmounted with a diameter of 10mm or mounted in a 12.7mm or 25.4mm anodized aluminum mounting ring, both with a clear aperture of 8mm. Tower’s 10mm Zero Order waveplates provide users with crystal quartz waveplates that have a clear aperture of 8mm. These waveplates have an air space between two crystal quartz plates that form the zero order capability. These 10mm waveplates are made from laser quality crystal quartz and each plate is anti-reflection, AR, coated on both sides. Standard retardations are 1⁄2 and 1⁄4 wave. There are 49 standard wavelengths, ranging from 248nm to 2020nm.
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This week's Question: Amazon recently filed a patent for parachute-aided delivery of packages. The proposed idea imagines drones releasing parcels from the sky, deploying parachutes to slow their descent and ensure the valuables inside remain...
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