PROPOSAL AND QUOTE FOR DETAIL DESIGN OF SALT/PFIS CAMERA AND COLLIMATOR OPTICS MOUNTS

Submitted to:

The University of Wisconsin

July 21, 2003

I. OVERVIEW This proposal and quote addresses the detail design of the optics mounting for the Prime Focus Imaging Spectrograph (PFIS) to be installed on the Southern African Large Telescope. II. FEATURES, CONSTRAINTS, AND TOLERANCES Concerning the overall assembly:

A1). The optical configuration and mechanical tolerances will be consistent with those in our reports, "Mechanical Tolerancing Results For the SALT/PFIS Collimator and Camera" dated January 24, 2003, and “PFIS Camera and Collimator CDR Conceptual Design Report” dated March 5, 2003. A2). The optics are as prescribed in the Zemax file “sys_ft_08.zmx”. A summary of the prescription is attached. A3). The primary construction material will be anodized aluminum. A4). 24 VDC power is available at the mounting location on the telescope. A5). The CCD dewar mass is approximately 7 kg, with a center of gravity approximately 150 mm behind its front mounting flange. A6). Stresses in the optical elements will be reduced to the practical minimum, and in any case will be kept below 500 psi. A further requirement for the collimator is listed in item B1. A7). The relevant temperature ranges and rates of change are

Normal operation: -5 to 20 °C, 1.5 °C/hour. Extended operation (20% reduction in imaging performance): -10 to 25 °C, 2 °C/hour Survival (no damage): -20 to 45 °C, 4 °C/hour.

The survival rate of change may be restricted to times when the assembly is thermally insulated from the external conditions. A8). The detail design will be completed to such a level that an engineer familiar with large opto-mechanical systems would be able to complete the fabrication and assembly of the system. A9). Optical testing will occur at normal shop temperatures. A10). The multiplets will be fluid coupled.

Concerning the collimator: B1). Collimator elements 2, 5,6,7, and 9 will be subject to stresses no higher than 50 psi over the operating temperature range to avoid appreciable stress-induced birefringence in those crystalline elements.

B2). The first group in item B2 above is to be mounted with a flange connection to the top of an Invar receiver on the optics bench. A 200 mm clear diameter is available. B3). The first group will include tip, tilt and axial position adjustments. The motions will be controlled with fine-pitch screws. B4). The turning flat and last group (doublet) mount separately to the Invar optics bench. The doublet mount will include a 5 dof adjustment. The surface of the bench is located 175 mm from the optical axis. B5). The main barrel will mount into a receiver from the top with a flange connection near the bottom. A kinematic interface is supplied by others. B6). The orientation of the main barrel about the optical axis will be adjustable in steps less than or equal to 7.5°. This may be done by means of a bolt circle with 7.5° spacing. B7). The main barrel will contain two axial Delrin spacers for thermal compensation between the first and second and first and third groups in that barrel. Each spacer is approximately 81 mm long. B8). The mass goal for the main barrel is 7.8 kg. B9). A 260-mm diameter envelope is available for the main barrel.

Concerning the camera: C1). Nothing may extend further than 0.5 mm past the vertex of the front element. C2). The camera elements are to be housed in one barrel, with the exception of the last element. The last element will be contained in the front plate of the CCD dewar. C3). The camera barrel is to be self-supporting on kinematic mounts arranged in two saddles near the ends of the barrel. The saddles and kinematic mounts are supplied by others. C4). The camera will include a flange mount for the CCD dewar. C5). The mass goal for the camera barrel is 48 kg. C6). The camera barrel is to generally stay within a 300 mm diameter. Selected areas may protrude. C7). The camera barrel will include a penetration and mounting provisions for a filter mechanism that is provided by others. C8). The camera includes active focus over a range of ±1 mm, accomplished by moving the last two groups in the camera barrel (singlet, triplet). The focus motion will be encoded with an LVDT. C9). The camera includes an axial Delrin spacer approximately 84 mm long between the singlet and triplet.

III. SCOPE OF WORK: The scope of work includes:

1). Detailed design and drawing generation for: Mechanical structure, Focus mechanism, Any specialized test fixturing, Any specialized handling and installation equipment.

2). Calculation of weight and balance based on detailed design 3). Generate optical test plan including quantitative values for expected precision of alignment techniques. 4). Analyze gravity-dependent deflections of the optical elements within their mountings using FEA.

IV. DELIVERABLE ITEMS: 1). Part fabrication drawings for camera, collimator, and fixturing. 2). Optical test plan. 3). Report summarizing the gravity-dependent deflections of the elements within their mountings. 4). Fixed-price quote for Phase 4 (fabrication, assembly, and test).

V. SCHEDULE: The deliverable items can be complete 8 weeks after receipt of order.

VI. NEEDED INFORMATION (None)

VII. COST The effort described in this quote is offered at a fixed price of $62,457. Following are the elements of this fixed price: Drawing package and test plan generation:

Detailed layout ............................................................................$13,080 Part drawing generation...............................................................$29,160 Assembly drawing generation ........................................................$4310 Test plan generation .......................................................................$4660 Quote generation for assembly, fab., and test.................................$1330 Subtotal .................................................................................................... $52,540

Additional items: The following items are in addition to those in the original estimate dated Sept. 14, 2002.

FE analysis of gravity dependent deflection of optics....................$6210 Travel and meeting attendance, 2 meetings at U.W. ......................$3707 Subtotal .................................................................................................... ... $9917 Total ......................................................................................................... .............. $62,457

The individual costs above are included only for substantiation of the total cost. The items may not be purchased separately. Costs for travel or meeting attendance beyond those listed above have not been included. These items can be obtained on a time-and-expenses basis. These items can also be quoted on a fixed-price basis once the meeting locations and scope are known. Time-and-expenses rates are:

Drafting ....................................................................... $55/hour Engineering, design, supervision................................. $85/hour Analysis and modeling .............................................. $135/hour Deliverable materials are charged at our cost plus 26%. Other expenses (e.g. transportation, lodging, non-deliverable materials) are charged at our cost. Travel requiring more than 3 hours per day is billed at the greater of 6 hours labor or the actual hours worked that day.

Any requested labor or materials outside the scope of this proposal may be obtained on a time-and-expenses basis. IIX. TERMS Any eventual order in accordance with this proposal and quote is non-cancelable.

Payment terms are 1% discount for payment within 10 days of invoice date, the net amount for payment within 30 days of invoice date, 1.5% per month interest. The proposed payment schedule is:

20% of order value due with order acceptance. Balance of order value invoiced upon delivery of deliverable items.

All deliverable items are FOB our facility in Monrovia, CA. Prices quoted do not include any applicable taxes, shipping charges, or insurance. These will be itemized and invoiced as they are incurred. The information that results from the effort described in this proposal is the property of The Pilot Group. In paying the invoice amounts, the client receives a license for use of such information for their own noncommercial, nonprofit purposes without restriction. This includes publication and information exchange as normally occurs in a research or university environment. Other uses are prohibited without the written permission of The Pilot Group. Drawings and other documents that result from the effort outlined and which are reproduced in their substantial entirety must retain any distinguishing logos and contact information of The Pilot Group. If this is not feasible, the reproduced documents must be otherwise properly credited to The Pilot Group. Original drawings and documents that have no logo or contact information on them may be reproduced as they are, with no need for crediting. We will exercise the same care with the client's optical elements as if they were owned by The Pilot Group. Notwithstanding, we can accept no liability for damage to those optical elements. All work methods, tools, and information formats are selected at the discretion of The Pilot Group. Material that has been ready for shipment for 14 days but has at the client's request not shipped from our facility will accrue storage charges at a rate of $0.04/square foot/day, with a minimum of $25/month. This proposal is valid for 30 days from the date on the front cover. IX. NOTES 1). Deliverable drawings will be in AutoCAD compatible format (.dwg or .dxf). Deliverable solid models will be in STEP or IGES formats. X. CONTACT INFORMATION The Pilot Group 128 W. Walnut Ave., Unit C Monrovia, CA 91016 voice: (626)59909422 fax: (626)599-9733 contact: Alan Schier

PFIS Construction Prescripton

System/Prescription Data File : C:\Documents and Settings\Rosey\Personal\1 Projects\Active\PFIS\Detailed Design Material\Zemax prescription\sys_ft_08.ZMX Title: SALT PFIS Date : SAT JUN 14 2003 Configuration 1 of 3 LENS NOTES: Notes... PFIS Construction Design, Version 3.0 Released for construction VIS 20 deg; 3 configs, image MF GENERAL LENS DATA: Surfaces : 68 Stop : 1 System Aperture : Entrance Pupil Diameter = 11000 Glass Catalogs : PFIS_0305 SCHOTT Ray Aiming : Off Apodization : Uniform, factor = 0.00000E+000 Effective Focal Length : 24012.09 (in air at system temperature and pressure) Effective Focal Length : 24012.09 (in image space) Back Focal Length : 10.48202 Total Track : 16029.99 Image Space F/# : 2.182917 Paraxial Working F/# : 2.182917 Working F/# : 2.206075 Image Space NA : 0.2232693 Object Space NA : 5.5e-007 Stop Radius : 5500 Paraxial Image Height : 27.93656 Paraxial Magnification : 0 Entrance Pupil Diameter : 11000 Entrance Pupil Position : 0 Exit Pupil Diameter : 131.9165 Exit Pupil Position : -287.9672

Field Type : Angle in degrees Maximum Field : 0.06666 Primary Wave : 0.5 Lens Units : Millimeters Angular Magnification : 83.38611 Fields : 4 Field Type: Angle in degrees # X-Value Y-Value Weight 1 0.000000 0.000000 2.000000 2 0.033330 0.000000 1.000000 3 0.050000 0.000000 0.750000 4 0.066660 0.000000 0.500000 Vignetting Factors # VDX VDY VCX VCY VAN 1 0.000000 0.000000 0.000000 0.000000 0.000000 2 0.000000 0.000000 0.000000 0.000000 0.000000 3 0.000000 0.000000 0.000000 0.000000 0.000000 4 0.040000 0.000000 0.106000 0.000000 0.000000 Wavelengths : 4 Units: Microns # Value Weight 1 0.320000 2.500000 2 0.380000 2.500000 3 0.500000 1.000000 4 0.620000 1.000000 SURFACE DATA SUMMARY: Surf Type Comment Radius Thickness Glass Diameter Conic OBJ STANDARD Infinity Infinity 0 0 STO PARAXIAL SALT PRIMARY - 13296.19 11000 - 2 PARAXIAL SAC - 162.6487 216.8845 - 3 STANDARD PUPIL Infinity 592 155.778 0 4 STANDARD FOCUS Infinity 10 121.5016 0 5 STANDARD FIELD LENS 93.953 10 F_QUARTZ_TOSOH 130 0 6 STANDARD 64.2 0.2936 LL5610-146 124 0 7 STANDARD 64.2 51 CAF2 124 0 8 STANDARD 266.578 21.59711 120 0 9 STANDARD HALFWAVEPLATE Infinity 11.83 F_QUARTZ 120 0

10 STANDARD Infinity 32.02 120 0 11 STANDARD QUARTERWAVEPLATE Infinity 11.98 F_QUARTZ 120 0 12 STANDARD COMPENSATOR Infinity 2.115793 120 0 13 STANDARD Infinity 45.68739 114.1197 0 14 STANDARD SINGLET -67.09427 10 F_QUARTZ_TOSOH 106 0 15 STANDARD 198.8 14.95315 132 0 16 STANDARD COMPENSATOR Infinity 2.134892 138.7123 0 17 STANDARD Infinity 6 141.4378 0 18 STANDARD SINGLET -724.92 30.1 F_QUARTZ_TOSOH 150 0 19 STANDARD -140.94 0.6361711 154 0 20 STANDARD COMPENSATOR Infinity 1.863779 172.0924 0 21 STANDARD Infinity 0.5 173.4762 0 22 STANDARD TRIPLET 914.4 55 CAF2 184 0 23 STANDARD -133.1 0.1054 LL5610-149 184 0 24 STANDARD -133.1 15 NACL 184 0 25 STANDARD -224.84 0.0847 LL5610-149 196 0 26 STANDARD -224.84 37 CAF2 196 0 27 STANDARD -141.12 88.67781 204 0 28 STANDARD COMPENSATOR Infinity 1.82981 203.616 0 29 STANDARD Infinity 298 203.6083 0 30 STANDARD DOUBLET Infinity 15 F_SILICA 202 0 31 STANDARD 187.768 0.0904 LL5610-146 198 0 32 STANDARD 187.768 51.5 CAF2 202 0 33 STANDARD -544.3 180 202 0 34 STANDARD SHUTTER Infinity 180 178.2046 0 35 COORDBRK - -10 - - 36 STANDARD GR SUBSTRATE Infinity 10 F_SILICA 179.6454 0 37 DGRATING PUPIL/ GRATING Infinity 10 F_SILICA 174.8313 0 38 STANDARD Infinity -10 181.5416 0 39 COORDBRK - 205 - - 40 EVENASPH QUADRUPLET 408.3324 15 F_SILICA 238 0 41 STANDARD 224.84 0.0892 LL5610-146 234 0 42 STANDARD 224.84 70 CAF2 238 0 43 STANDARD -337.66 0.0814 LL5610-146 238 0 44 STANDARD -337.66 15 F_SILICA 238 0 45 STANDARD 271.87 0.0853 LL5610-146 244 0 46 STANDARD 271.87 50 CAF2 244 0 47 STANDARD -1734.276 104.322 244 0 48 STANDARD COMPENSATOR Infinity 1.823927 249.0912 0 49 STANDARD FOCUS Infinity 2 249.2272 0 50 STANDARD SINGLET 462.79 27 CAF2 250 0 51 STANDARD BAFFLE Infinity 27 CAF2 249.2712 0

52 STANDARD -366.826 53.43633 250 0 53 STANDARD COMPENSATOR Infinity 1.981603 213.8621 0 54 STANDARD Infinity 5 212.9193 0 55 STANDARD TRIPLET 250.2888 45 F_SILICA 210 0 56 STANDARD Infinity 0.0762 LL5610-149 194 0 57 STANDARD Infinity 15 NACL 194 0 58 STANDARD 119.533 0.1084 LL5610-149 170 0 59 STANDARD 119.533 90 F_SILICA 170 0 60 STANDARD 502.68 13.18304 144 0 61 STANDARD FOCUS END Infinity 2 134.226 0 62 STANDARD COMPENSATOR Infinity 2.289966 131.6489 0 63 STANDARD FILTER Infinity 8 F_SILICA 132.4097 0 64 STANDARD COMPENSATOR Infinity 2 128.3738 0 65 STANDARD Infinity 20.17988 129.3027 0 66 STANDARD FLATTENER -173.942 8 F_SILICA 127.3 0 67 STANDARD 530.6 10.48649 127.3 0 IMA STANDARD Infinity 116 0