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Entry  Tue Jun 9 15:02:56 2020, eHang, Update, BHD, Astigmatism and scattering plots LO_MM_t_scat_stock.pdfLO_MM_s_scat_stock.pdfLO_MM_adj_stock.pdf
Message ID: 15387     Entry time: Tue Jun 9 15:02:56 2020     In reply to: 0
Author: eHang 
Type: Update 
Category: BHD 
Subject: Astigmatism and scattering plots 

Using the updated AOI's for the LO path: (4.8, 47.9, 2.9, 4.5) deg for (LO1, LO2, LO3, LO4), we obtain the following results. 

First two plots are scattering plots for the t and s planes, respectively. Note that here we have changed to 0.5% fractional RoC error and 3 mm positional error. We have also changed the meaning of the colors: pink:MM>0.98; olive 0.95<MM<=0.98, and grey MM<=0.95. It seems that both planes would benefit statistically if we make the LO3-LO4 distance longer by a few mm. 

We also consider how much we could compensate for the MM error in the last plot. We have a few mm window to make both planes better than 0.95. 

Attachment 1: LO_MM_t_scat_stock.pdf  722 kB  Uploaded Tue Jun 9 16:05:32 2020  | Hide | Hide all
LO_MM_t_scat_stock.pdf
Attachment 2: LO_MM_s_scat_stock.pdf  721 kB  Uploaded Tue Jun 9 16:06:55 2020  | Hide | Hide all
LO_MM_s_scat_stock.pdf
Attachment 3: LO_MM_adj_stock.pdf  99 kB  Uploaded Tue Jun 9 16:13:08 2020  | Hide | Hide all
LO_MM_adj_stock.pdf
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