Hello,

I wish to establish a manufacturing RMS irregularity for a set of mirrors that compose a three mirror telescope. The goal is to achieve the allowable MTF budget reserved for fabrication. In order to do this, I have tolerated the system using the TEZI operand for each mirror surface and balanced the tolerances such that it fulfill the requirement. Although, there are some doubt remaining, and I would be glad if someone could assist me with the answers:



1-Is this approach adequate for my purpose?

2-Does the RMS values set on TEZI operand the 'real' values to be achieved? I wonder if is there any multiplication factor related with the interferometic test?

3-The frequency range of the irregularity depends on the interval of the Zernike coefficients set. What would be the appropriated value for that interval? Does it depend on the manufacturing processes of the mirrors?

I thank any assistance in advance.