IT IS DIVIDED IN TWO PARTS: 

I) MECHANICAL
A) BED: IT IS OPTICALLY GROUND AND STABLE.
B) LEAD SCREW: IT IS ALSO OPTICALLY GROUND WITH 200MM LENGTH AND IMM PITCH.
C) OPTICAL MIRROR MOUNT: KINEMATIC MIRROR MOUNTS ARE PROVIDED TO HOLD THE MIRROR.
II) OPTICAL PART:
A) BEAM SPLITTER : IT IS OPTICALLY WORK WITH /10SURFACE FLATNESS.
B) COMPENSATING PLATES: TWO PLATES ARE PROVIDED.
C) MIRROR : 2NOS MIRROR OF FOCAL LENGTH 20MM ARE PROVIDED.