[Clas12_rich] Linear distances of top row of RICH mirrors

[Patrizia Rossi]

Thank you Tyler and Mary Ann, this was, indeed, a useful check!
It seems that overall we are fine with the dimensions

patrizia


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# Patrizia Rossi
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> On 24/ago/2016, at 15:32, Tyler Lemon <tlemon at jlab.org> wrote:
> 
> Hello,
> 
> Since we have RICH mirrors 3, 3C, 4C, and 4 that make up the top row of the mirror assembly, Mary Ann used AutoCAD to measure linear distance from corner-to-corner of the mirror assembly. Attached is an Excel sheet compiled containing the measurements and a diagram with the dimensions we measured highlighted in red.
> 
> Mary Ann measured the the entire length of the assembly along the top edge and along the bottom of the first row of mirrors. The measurements were taken using the corner points for the ideal model and then repeated using the corner points as measured by CMM.
> 
> The measurement from the CMM data of the top edge was 2686.62 mm with a difference of -0.44 mm with respect to the ideal model.
> The measurement from the CMM data of the bottom of the first row was 2396.48 mm with a difference of 0.30 mm with respect to the ideal model.
> 
> In addition to the linear measurement, we are also able to see that the corners of the first row (shown in blue on the diagram within the Excel sheet) within ~0.25 mm from being co-planar. 
> 
> Best regards,
> Tyler
> <3D autocad dimensions.xlsx>

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