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Entry  Mon Apr 16 16:21:01 2012, tara, Notes, optic, windows for vacuum chamber 
    Reply  Tue Apr 17 19:51:54 2012, tara, Notes, optic, windows for vacuum chamber IMG_0757.jpg
       Reply  Thu Apr 19 03:12:23 2012, tara, Notes, optic, windows for vacuum chamber 
          Reply  Sun Apr 22 23:09:38 2012, tara, Notes, optic, windows for vacuum chamber 
             Reply  Mon Apr 23 16:52:16 2012, tara, Notes, optic, windows for vacuum chamber 
                Reply  Wed Apr 25 10:44:29 2012, Frank, Notes, optic, windows for vacuum chamber 
                   Reply  Thu Apr 26 08:35:57 2012, steve, Notes, optic, windows for vacuum chamber 
                      Reply  Fri Apr 27 08:46:24 2012, Frank, Notes, optic, windows for vacuum chamber 
                         Reply  Tue May 1 20:37:16 2012, tara, Notes, optic, windows for vacuum chamber 
                            Reply  Fri May 11 17:52:17 2012, tara, Notes, optic, windows for vacuum chamber O-Rings.pdf.zip
                               Reply  Wed May 16 22:27:13 2012, tara, Notes, optic, windows for vacuum chamber 2_small_window.PDFblank_10_wedge.PDF
                                  Reply  Mon May 21 16:53:38 2012, tara, Notes, optic, windows for vacuum chamber edit_blank_10_wedge.PDFwindow_assembly.PDFwindow_assembly2.PDF
                                     Reply  Wed May 23 15:04:53 2012, steve, Notes, optic, windows for vacuum chamber 
Message ID: 922     Entry time: Tue Apr 17 19:51:54 2012     In reply to: 919     Reply to this: 926
Author: tara 
Type: Notes 
Category: optic 
Subject: windows for vacuum chamber 

If we go with plan2,

1)window and flange

  • I think the window size of 2.75" diameter is the largest size for us ( with 3" clearance between the 2 beams). Thorlabs has a 2.75" window with 1.5" optic,with 1.18" opening, so it might not be compatible with its wedged window:http://www.thorlabs.us/NewGroupPage9.cfm?ObjectGroup_ID=5546 which is only 1" diamter.
  • Or we can order 2.75" flange with 1" bored, from N-C. to use with Thorlabs' window. Though I'm not sure how to assemble the two together.

2) Two Half-Nipple will be welded to the blank on the 10" flange. They will be 3" apart, as the input beams are. We might need something smaller than 2.75" diameter for accessing all the screws.

3)  blank 10" flange: I think Frank said that we have one in the lab. For another one, we can order it from N-C, blank. It is ~$ 300.

 

I'm not sure how to mount the window and the flange together. If we buy the window set from Thorlab, I think it can be directly assemble them similarly to the current 10" flange, see figure below. Or we might need to mount the windows like Zach does for Gyro, see ATF:1601.

 IMG_0757.jpg

 

Quote:

I'm checking the properties/prices/availability of window for the vacuum chamber.

 

Plan1: 10" diameter window (6" window opening)

  •  A&N: ($775), no info on optical quality. This is probably just a regular viewport similar to the one we use.
  • Pfeiffer also offers viewports for visually monitoring, so I think they are not good enough.
  •  MDC fused silica window, for 10" flange ($ 3,297), no optics properties. Only lens grade for ultraviolet are specified, but they claim that for IF also available (viewport)
  • Nor-Cal also has flange for 10" and 2.75" with glass,fused quartz, fused silica material. no optics properties shown.

 Plan2: 10" diameter blank with 2 smaller windows (1.5"/2" diameter)

  •  Thorlabs: 2.75" OD window, 1.18" window (windows are replacable, I think we can switch to CVI windows ) ($244 x2) + machining .
  •   MDC offer 2.73" with 1.5" window, no info on optics properties 

 

 Most of the manufacturers do not have good window for laser with 10" flanges. Finding two smaller windows with good optics properties is probably easier.

 

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