NIC Aperture, Pupil, and Filter Wheel Positions Rev. 1.6 March 7, 2011 Oli Durney LBTI Optical Engineer Steward Observatory University of Arizona

ND Wheel - Assembly Neutral Density filter set: P/N FX90-0100 from Janos Technology Drawn as viewed with cover plate removed from Access Port side (side facing PICNIC Detector) CW rotation of motor = CW rotation of wheel 1 2 3 4 5 Position Description Dimensions 1 (Home) Open f=25.4mm 2 OD=0.50, T=31.62% f=25.4mm, t=1mm 3 OD=1.00, T=10.00% f=25.4mm, t=1mm 4 OD=2.00, T=1.00% f=25.4mm, t=1mm 5 OD=3.00, T=0.10% f=25.4mm, t=1mm CW NOTE: Optical Axis (Exit Port) is shown in red and is located at Position 1 when Wheel is in the Home position, Pos 1 will be replaced with an A/R coated ZnSe window

Optics Wheel – Assembly CaF2 re-imaging lenses from ISP Optics Drawn as viewed with cover plate removed from flat side (side facing PICNIC Detector) CW rotation of motor = CW rotation of wheel 4 3 1 5 2 6 Position Description Dimensions 1 (Home) Open Open 2 Dual Large Lenses f=9.5mm, t=2.8mm 3 Open Open 4 Mixed Large/Small f=9.5mm, t=2.8mm Lenses f=8.5mm, t=2.8mm 5 Open Open 6 Dual Small Lenses f=8.5mm, t=2.8mm CW NOTE: Optical Axis (Exit Port) is shown in red and is located at Position 1 when Wheel is in the Home position

Mixed Large/Small Lenses Optics Wheel – Cells Dual Large Lenses Mixed Large/Small Lenses Dual Small Lenses

Prism Wheel - Assembly Neutral Density filter set: P/N FX90-0100 from Janos Technology Drawn as viewed with cover plate removed from Baffle Tube side (side facing Field Lenses) CW rotation of motor = CW rotation of wheel 1 4 5 2 3 6 Position Description Dimensions 1 (Home) Open Open 2 Dual Triplet Prisms 12x12mm 3 H Filter f=25.4mm 4 Single Triplet Prism 12x12mm with H Filter 5 K Filter f=25.4mm 6 Single Triplet Prism 12x12mm with K Filter CW NOTE: Optical Axis (Entrance Port) is shown in red and is located at Position 1 when Wheel is in the Home position

Single Triplet Prism with Filter Prism Wheel – Cells Dual Triplet Prisms Single Triplet Prism with Filter

NAC Aperture Wheel ZnSe lenses and mirror from Edmund Optics Drawn as viewed from cryostat Window side CW rotation of motor = CW rotation of wheel 1 2 3 5 4 6 Position Name Size 1 (Home) Open 42.86 x 42.86mm 2 Open f=25.4mm 3 3x3 Grid of Pinholes 36.46 x 36.46mm f=1mm, d=8.94mm 4 Znse Lens f=25.4mm 5 Open f=25.4mm 6 ZnSe Lens and 45° f=25.4mm Fold Mirror CW NOTE: Optical Axis (Entrance Port) is shown in red and is located at Position 1 when Wheel is in the Home position

LMIRCam Filter Wheel #1 7 6 8 9 5 4 10 CCW 11 3 2 12 1 Single Apertures installed on 01-21-11 Drawn as viewed with cover plate removed from Baffle Tube side (side facing LMIRCam Dichroic) CW rotation of motor = CCW rotation of wheel Position Name Size 1 (Home) Open 25.4mm 2 Small Dual Aperture f~7.19mm 3 Large Dual Aperture f~7.49mm 4 Left Aperture f~8.16mm 5 Right Aperture f~8.21mm 6 Open 25.4mm 7 Open 25.4mm 8 Open 25.4mm 9 Open 25.4mm 10 Open 25.4mm 11 Pinhole ~0.33mm 12 Blank 25.4mm 7 6 8 5 9 4 10 CCW 3 11 2 12 1 NOTE: Optical Axis (Entrance Port) is shown in red and is located at Position 1 when Wheel is in the Home position

LMIRCam Filter Wheel #2 1 2 12 11 3 4 10 CW 5 9 6 8 7 All filter retainer rings adjusted on 01-19-11, H & J filters installed on 03-08-11 Drawn as viewed with cover plate removed from flat side (side facing LMIRCam Baseplate) CW rotation of motor = CW rotation of wheel Position Name Size 1 (Home) Open 25.4mm 2 Blank 25.4mm 3 L-short (3.10-3.51 mm) 25.4mm 4 Std ‘L’ (3.41-3.99 mm) 25.4mm 5 L-long 1 (3.51-4.06 mm) 25.4mm 6 L-long 2 (3.81-4.05 mm) 25.4mm 7 Std ‘M’ (4.60-4.97 mm) 25.4mm 8 M-long (4.60-5.86 mm) 25.4mm 9 L-spec (2.81-4.00 mm) 25.4mm 10 J (1.18-1.36 mm ) 25.4mm 11 H (1.50-1.81 mm) 25.4mm 12 Ks (2.00-2.32 mm) 25.4mm 1 2 12 3 11 4 10 CW 5 9 6 8 7 NOTE: Optical Axis (Exit Port) is shown in red and is located at Position 1 when Wheel is in the Home position

LMIRCam Filter Wheel #3 4 3 5 6 2 1 7 CCW 12 8 11 9 10 New filter (Pos 10) installed on May 11, 2010 Drawn as viewed with cover plate removed from Baffle Tube side (side facing Biconic #2) CW rotation of motor = CCW rotation of wheel Position Name Size 1 (Home) Open 25.4mm 2 H2O Ice 1 (2.96-3.12 mm) 25.4mm 3 H2O Ice 2 (3.01-3.15 mm) 25.4mm 4 PAH 1 (3.26-3.31 mm) 25.4mm 5 PAH 2 (3.38-3.43 mm) 25.4mm 6 Br-a (4.02-4.09 mm) 25.4mm 7 Br-a off (3.97-4.04 mm) 25.4mm 8 L-cont 1 (3.13-3.20 mm) 25.4mm 9 L-cont 2 (3.39-3.54 mm) 25.4mm 10 L-cont 3 (3.55-3.64 mm) 25.4mm 11 L-cont 4 (3.68-3.88 mm) 25.4mm 12 Blank 4 3 5 2 6 1 7 CCW 12 8 11 9 10 NOTE: Optical Axis (Entrance Port) is shown in red and is located at Position 1 when Wheel is in the Home position

LMIRCam Filter Wheel #4 4 5 3 6 2 7 1 CW 8 12 9 11 10 PK-50 Blocker not installed because of OD clearance concern (substrate delivered with 2 chips) Drawn as viewed with cover plate removed from Baffle Tube side (side facing detector) CW rotation of motor = CW rotation of wheel Position Name Size 1 (Home) Open 25.4mm 2 Blank 25.4mm 3 PK-50 Blocker 25.4mm 4 Pupil Imaging Lens (ZnSe) 12.7mm 5 Open 25.4mm 6 Open 25.4mm 7 Open 25.4mm 8 Open 25.4mm 9 Open 25.4mm 10 Open 25.4mm 11 Open 25.4mm 12 Open 25.4mm 4 5 3 6 2 7 1 CW 8 12 9 11 10 NOTE: Optical Axis (Exit Port) is shown in red and is located at Position 1 when Wheel is in the Home position

LMIRCam Aperture Wheel New filter (Pos 10) installed on May 11, 2010 Drawn as viewed with cover plate removed from side opposite cryo-motor (side facing Biconic #2) CW rotation of motor = CW rotation of wheel 2 Position Name Size 1 (Home) Open 50.8x50.8mm 2 Open 50.8x50.8mm 3 Pinhole 1mm? 4 Blank 50.8x50.8mm 3 1 CW 4 NOTE: Optical Axis (Exit Port) is shown in red and is located at Position 1 when Wheel is in the Home position