Opto-mechanical Design weekly telecon.:
(11/20/2007 and 1100 hrs.-1200 hrs.)
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DG (Mt. Hamilton)
RK (UCSC)
AM, VV (Caltech)
JB (WMKO)
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CN, MB, CL didn't attend but have action items
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VV: Put in the telescope in the optical design. RK: Can do.
DG: Requirements are different for LGS, dNIRI and TT pick-offs
AM: Summary of possible mechanisms - write up something about what's available and add on the concepts.
DG: Write requirements based on the need of the three pick-offs - dithering has a huge impact only on the TT pick offs (as compared to DNIRI)
DG: Dither moves on DNIRI is different from others. 
AM: Want to finish WSPS. TWFS, TT and DNIRI FoVs?
DG: Beware of the needs but not worry about details.
DG: For. e.g. Jump around, jump around at this speed - have these been built in the past, can we adapt them?
DG: Don't spend too much time on the instrument without understanding what the instrument group wants.
DG: Just highlighting issues.
DG: Switchyard at the f/46. 
DG: f/46 needs to have an articulated mirror.
VV: NGS WFS, TWFS, possibly a PSF cam also need pick-offs (V Velur, Chris Neyman will address it!) - pass on info. about requirements to RK and CL
Action Item: PSF cam requirements? wavelength == same as science. (Matt Britton, Chris Neyman)
DG: JB and Chris haven't still talked about the "space tsar" position. 
Action Item: Get a combined drawing going this week (JB and CL).
AM: Can the 150" work?
JB: IS there an optical presccription.
RK: Will post the 150" FoV, with the dichorics in the right order.
RK : Did try 7 mm pitch in one level, it sort of works.
JB: Do we need  a solidworks model for the new design
DG: JB and CL talk and develop solid models.
Action Item: RK to write a memo about optical design and packaging in zemax.
JB: The current AO system is multi-level
VV/ DG: Reason for not going to multi-level is stiffer structures and athermalization design.
JB: There may be more space for access.
DG: It probably OK to pin down the multi-level scheme.

Some people signed off ---

OSM requirements issue:

OSM tradestudy and OSM conceptual design. 
AM: 3.2.3.11 has no WSPS? ("d-IFU & LOWFS AO & Object Selection Mechanism ")
3.1.2.2.16 Already approved ("LOWFS & d-NIRI Ao and object selection")
DG: 3.2.3.11 needs a WSPS -- AM needs to make up a "WSPS".
AM: Just deal with LOWFS and TWFS and may happen that this may also be useful for dNIRI.
DG: LGS, LOWFS (let the TWFS be in the back-burner).
AM: Sean needs to write an instrument requirement.
DG: AM can draft a DNIRI requirements and hand it over to SA if he wants to do it.
DG: We need to write down all we can from now until Dec.
AM: Positioning and clustering the issue.
DG: A solid concept that can be easily made into a 3D mech. model that's what we want to be the deliver.
AM: Is the title "LOWFS and LGS OSM pick off study".
DG: OSM (includes DNIRI) that's what we want.
DG: Prudent to cut it here and do the AO system properly. Can deal with Sci. instruments later.
AM: RD said that the OSM is part of the AO system, not sure if that went well with the instrument group.
Action Item: EC will decide how to complete task 3.2.3.11
Action Item: AM to just do LGS and LOWFS for now.
DG/AM: Basic things like Fo Patrol, Fo View per channel. Science requirements need to get flown down.
AM: Worried about observational mode, what's the accuracy of open loop and closed loop positioning?
DG: Field and speed are probably the ones that we need to estimate (raise questions if clarification is needed).