Patent ID: 8260099

Claim:
An optical device comprising a reconfigurable optical add/drop multiplexer, including: a digital mirror device having an array of selectively positonable micromirrors; first and second lens; the first lens being configured for directing optical signals between input, express, add, and drop ports, and a front of the second lens; and the second lens being configured for passing optical signals from the input and add ports through the first lens at reduced angles of incidence onto respective corresponding input and add areas of the micromirror array, and for passing optical signals from express and drop areas of the micromirror array at reduced angles of reflection through the first lens toward the express and drop ports; and reflective elements configured for selectively directing optical signal from an input area to one of the express or drop areas depending upon selective positioning of a first set of the micromirrors, and for selectively directing optical signals from the add area to the express area depending upon selective positioning of a second set of micromirrors, wherein the second lens is a negative cylindrical lens.