Development of a segmented grating mount system for FIREX-1

A mount system for segmented meter-sized gratingshas been developed, which has a high precision gratingsupport mechanism and drive mechanism to minimize both deformation of the optical surfaces and misalignments in setting a segmented gratingfor obtaining sufficient performance of the pulse compressor. From analytical calculations, deformation of the gratingsurface is less than 1/20 lambda RMS and the estimated drive resolution for piston and tilt drive of the segmented gratingis 1/20 lambda, which are both compliant with the requirements for the rear-end subsystem of FIREX-1.