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SOAR at Horizon
Telescope Ring Section= 1272.4x336mm
Laser Box Width=300-400mm
19/12/06
SAM_LGS_1, CTIO, Optics
1
Yoke-Ring Space near Elevation Axis
First conclusion: Laser Box cant go on the low side of the ring neither
above the Elevation axis.
19/12/06
SAM_LGS_1, CTIO, Optics
2
Laser Box Size
• Laser Head(+Connectors):~900x140x90mm
• Space (Align/Dump Mirror):~150mm
• Beam Expander: 141xF31.75mm
(could be up to 200xF50mm)
• Compensator: 110x230x166mm
(because of rotator and vernier)
• Steering Mirror stand:~50x50mm
• Extra Width (Align.Laser/mirror):~100mm
• Extra Length (Beam/Align Camera):~100mm
• Base Plate/Table: 25.4 to 60mm
Laser Box Estimate: 1510x330x226mm
Laser Box Mock :
1600x400x250mm
19/12/06
SAM_LGS_1, CTIO, Optics
3
Soleil-Babinet Compensator
8-500-UV-25 from Special Optics
CA=25mm, Max. Retardation=400nm,
Resolution=0.5nm and Price= $4.150
Space needed (lxwxh)=110x229.4x165.4mm
19/12/06
SAM_LGS_1, CTIO, Optics
4
Laser Control and Cooler
19/12/06
SAM_LGS_1, CTIO, Optics
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Laser Box on Truss
Pros: one mirror less, follows serrurier flexure
Cons: mechanical support?, adjustable M3 on LLT, ~70Kg on
one truss?
19/12/06
SAM_LGS_1, CTIO, Optics
6
Laser Box Horizontal on SOAR Ring
Pros: beam is folded up along a truss then over a spider arm so
can be protected, M3 on LLT fixed.
Cons: a shelf must be made on the telescope ring, the cable end
of the box is positioned opposite to the nasmyths (could be good
for the electronics control but bad for the cooling system).
19/12/06
SAM_LGS_1, CTIO, Optics
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Laser Box (Hor./Vert.) at Bent-Cass port 2
Pros and Cons are the same as for all vertical (except on truss) and
horizontal configurations, i.e. one mirror less and adjustable M3 on LLT v/s
M3 fixed and one mirror more (M5). But the bent-cass port has one extra
advantage, i.e. we can use the instrument holes that are already there.
19/12/06
SAM_LGS_1, CTIO, Optics
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Laser Box Into the Bent-Cass port 2
M3
M4
M5
Pros: most convenient from installation point of view.
Cons: only F60mm space for fold mirror M5 and protecting tube
and protection tube in the way of the SOAR M1 covers.
Proposal: LB in same position but Outside the Tel.Ring (orange)
19/12/06
SAM_LGS_1, CTIO, Optics
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To Do List
• Study the Laser cooling system
• Study the laser control system
19/12/06
SAM_LGS_1, CTIO, Optics
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