Patent ID: 8456622
Filing Date: 2013-06-04
Classification: G01J

Abstract:
1. A coherence measurement system for receiving input from a coherent light source, said system comprising: a plurality of optical fibers having first ends and second ends, the first ends being arranged in proximate groups having the same number of optical fibers with each of said proximate groups being capable of receiving a portion of the input, and with each optical fiber of said plurality of optical fibers having a gross length that differs from at least one of another said optical fiber within said proximate group, and wherein each proximate group has fibers having the same set of different lengths, with said second ends of said optical fibers being arranged in the same proximate groups as the first ends as an output; a lens having a front side positioned to receive light from said output of said plurality of optical fibers and a back side opposite said front side for providing focused light at a back focal plane; and a detector having an active surface positioned at the back focal plane of said lens and capable of detecting the interference of light from said lens at the back focal plane, said detected interference allowing measurement of coherence.