Despite its widespread use, PPG accuracy can vary significantly across individuals, particularly by skin tone. Darker skin contains more melanin, which absorbs and scatters light, often leading to ...

CERAC is a leading manufacturer of evaporation materials, sputtering targets and specialty inorganic chemicals for the global optical coating industry.

Special Optics designs, develops and manufactures precision optical components from one facility located in Wharton, New Jersey. Since our beginning in 1965 we have developed and refined a wide range ...