IN such elementary text-books on geometrical optics as I have consulted it has always seemed to me that the writers have found a difficulty in presenting a precise direct proof of the theorem that ...

The Wordle word of the day on December 25 was prism, a word that feels almost unfairly elegant for something so relentlessly honest. A prism exists to intervene between appearance and understanding, ...

Products from the PrismMaster® series are used for high-precision angle measurement of prisms, polygons and many other optical components. The automation of the measurement process ensures fast and ...

Yutai's Dispersive Equilateral Prisms, which are fabricated from H-ZF13, F4,H-K9L or infrared material.These prisms create less stray light than diffraction gratings, thereby eliminating the higher ...