Annular quadrant silicon photodiodes operate between 350 and 1100 nm, and are used for backscatter reflectivity measurements. The active area on each element is 1.6 and 19.6 mm2, respectively, with a spectral range from 190 to 1100 nm and a typical peak wavelength of 980 nm.
OSI Optoelectronics
Hawthorne, CA
www.osioptoelectronics.com