title: Improved wedge-plate shearing interferometric technique for a collimation test.
abstract: An improved wedge-plate shearing interferometric technique for collimation testing is presented. With two mirrors, the technique provides a twofold increase in sensitivity and has its own reference.
authors: L
authors: L
authors: Gouhua
authors: Z
authors: Z
authors: Mingshan
authors: Z
authors: Z
authors: Jingbin