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JWST/IFS Prototype

JWST/IFS Prototype. Progress Meeting n°3 13/06/2003 LAM - Marseille. Agenda. 1. Action item list 2. Schedule review 3. Progress on Optical manufacturing (postponed in the afternoon) 4. Progress on Mechanical manufacturing 5. Presentation of the integration plan

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JWST/IFS Prototype

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  1. JWST/IFS Prototype Progress Meeting n°3 13/06/2003 LAM - Marseille

  2. Agenda 1. Action item list 2. Schedule review 3. Progress on Optical manufacturing (postponed in the afternoon) 4. Progress on Mechanical manufacturing 5. Presentation of the integration plan 6. Presentation of the test plan version 1.0 6.1 overall plan 6.2 preparation in Lyon 7. Action list 8. Conclusion JWST/IFS prototype progress meeting n°3 LAM - Marseille

  3. Action Item List 1. Action item list 2. Schedule review 3. Progress on Optical manufacturing (postponed at this afternoon) 4. Progress on Mechanical manufacturing 5. Presentation of the integration plan 6. Presentation of the test plan version 1.0 6.1 overall plan 6.2 preparation in Lyon 7. Action list 8. Conclusion JWST/IFS prototype progress meeting n°3 LAM - Marseille

  4. Schedule JWST/IFS prototype progress meeting n°3 LAM - Marseille

  5. Mechanical ManufacturingStatus JWST/IFS prototype progress meeting n°3 LAM - Marseille

  6. JWST/IFS prototype progress meeting n°3 LAM - Marseille

  7. JWST/IFS prototype progress meeting n°3 LAM - Marseille

  8. Conclusions • Todaythe phase of half completion was made • The sub contractor must: • Finish the machining • Implement all the element • check • Delivery of the mechanical assemblybefore the end of June JWST/IFS prototype progress meeting n°3 LAM - Marseille

  9. Assembly Plan JWST/IFS prototype progress meeting n°3 LAM - Marseille

  10. Prototype assembly and adjustment process • Use of a Coordinates Measurement Machine (CMM) • for mechanical pieces manufacturing control • at each stage of the mechanical pieces assembly • for the optical pieces positioning • for the clamp wedges definitions • Use of optical bench for the reimaging mirror alignment JWST/IFS prototype progress meeting n°3 LAM - Marseille

  11. CMM measurements process • CMM calibration and measurements precision • Reference trihedron definition • Main structure measurement • Substructure measurement and positioning • Pupil and slit mirrors arrays positioning • Clamp wedges definition JWST/IFS prototype progress meeting n°3 LAM - Marseille

  12. Pupil mirror array Dummy Stack Slit mirror array Active Stack Heel Stacksupport Thrust cylinders Substructure Steeringmirror Main stucture Optomechanical view JWST/IFS prototype progress meeting n°3 LAM - Marseille

  13. Reference trihedron definition • Y dimension measurement of Stack support plane : flatness • Thrust cylinders positioning • Cylinder thrust surface measurement defining YOZ • Cylinder thrust surface measurement defining XOY JWST/IFS prototype progress meeting n°3 LAM - Marseille

  14. Main structure measurement • Z dimension of the main structure back surface • Z, x, y JWST/IFS prototype progress meeting n°3 LAM - Marseille

  15. Substructure measurement and positioning • X substructure location • Y dimension and parallelism of the XOZ planes JWST/IFS prototype progress meeting n°3 LAM - Marseille

  16. Substructure measurement and positioning • Y dimension and parallelism of the XOZ planes JWST/IFS prototype progress meeting n°3 LAM - Marseille

  17. Substructure measurement and positioning • X, Z dimensions and y tilt JWST/IFS prototype progress meeting n°3 LAM - Marseille

  18. Pupil mirrors arrays positioning • Pupil mirrors array positioning • Z, X, y JWST/IFS prototype progress meeting n°3 LAM - Marseille

  19. Slit mirrors arrays positioning • Slit mirrors array positioning • Dummy slit mirrors line used • Z, X, y JWST/IFS prototype progress meeting n°3 LAM - Marseille

  20. Clamp wedges definition • Clamp wedges definitions for pupil mirrors array • Clamp wedges definitions for slit mirrors array JWST/IFS prototype progress meeting n°3 LAM - Marseille

  21. Use of optical bench for the reimaging mirror alignment • Reimaging mirror : no possible access for the CMM • Use of the optical tests bench • Dummy slit mirrors • Imagery of the pupil mirrors • Detection configuration 2 (Gy = 5) • Mirror alignment by centring the pupil image on pupil mirrors • Adjustment on translation (X, Y, Z) • All the mirror mechanical structure is adjusted by the use of wedges JWST/IFS prototype progress meeting n°3 LAM - Marseille

  22. Image Slicer Prototype Test Plan

  23. Introduction • Optical design and quality • Tolerancing study results • Tests to be realised • Experimental protocol set up • Conclusion JWST/IFS prototype progress meeting n°3 LAM - Marseille

  24. Incident collimated beam Slit mirrors Slices Folding mirror Oy Pupil mirrors Oz Steering mirror Optical Scheme _ Lateral view JWST/IFS prototype progress meeting n°3 LAM - Marseille

  25. Slit mirrors Slit mirrors Slit mirrors Slices Slices Reimaging mirror Reimaging mirror Pupil mirrors Pupil mirrors Ox Ox Oz Oz Optical Scheme _ Lateral view _ 15 Slices Optical Scheme _ Lateral view _ 5 active slices JWST/IFS prototype progress meeting n°3 LAM - Marseille

  26. 2.754 mm Ymax 4 mm Xmin C Xmax Ymin Beam location on pupil mirrors JWST/IFS prototype progress meeting n°3 LAM - Marseille

  27. Slit mirrors Pupil mirrors Slices imagery on slit mirrors JWST/IFS prototype progress meeting n°3 LAM - Marseille

  28. A E C B D F Slices imagery on slit mirrors JWST/IFS prototype progress meeting n°3 LAM - Marseille

  29. Dimensions of slices geometrical images JWST/IFS prototype progress meeting n°3 LAM - Marseille

  30. Optical Quality on Slice 1 JWST/IFS prototype progress meeting n°3 LAM - Marseille

  31. Optical Quality on Slice 5 JWST/IFS prototype progress meeting n°3 LAM - Marseille

  32. Typical PSF dimension RMS Radius:12.1 µm GEO Radius:32.2 µm Airy Radius (0.6 µm) : 4.3 µm Airy Radius (1 µm) : 7 µm Airy Radius (3 µm) :21.1 µm JWST/IFS prototype progress meeting n°3 LAM - Marseille

  33. Typical PSF dimension JWST/IFS prototype progress meeting n°3 LAM - Marseille

  34. Exit pupil images on detector coordinates JWST/IFS prototype progress meeting n°3 LAM - Marseille

  35. Tolerancing study results JWST/IFS prototype progress meeting n°3 LAM - Marseille

  36. Tolerancing study results Analysis with thermal effects Analysis without thermal effects JWST/IFS prototype progress meeting n°3 LAM - Marseille

  37. Tests to be realised : METROLOGY • Slicer Stack • Shape (profile projector machine) • Active surface shape and angles (3D without contact measurement machine) • Tolerancing study results • Shape (profile projector machine) JWST/IFS prototype progress meeting n°3 LAM - Marseille

  38. Tests to be realised : WARM TESTS • Imagery of pupil mirrors plane • Pupil images absolute positions in the pupil mirrors plane • Imagery of slice images on slit mirrors • Length and relative positioning • Position, length, width, distortion • PSF measurement (at 0.6 µm and 1 µm) • Exit pupil • Relative dimensions and positions • Stray light (goal) • Partial measurements JWST/IFS prototype progress meeting n°3 LAM - Marseille

  39. Tests to be realised : COLD TESTS • Imagery of slice images on slit mirrors • Relative dimensions and positions • Length, width, distortion • PSF measurement (at 0.6 µm and 1 µm) • Exit pupil • Relative dimensions and positions • Stray light (goal) • Partial measurements JWST/IFS prototype progress meeting n°3 LAM - Marseille

  40. Optical Scheme of the test experimental set up • Requested measurements precision driven by the tolerances values • Real measurements precision: 1 pixel • Pixel size: 9µm * 9µm • Detector size: 14mm * 9.2mm • Need of many configurations for the detection unit • Pupil mirrors imagery with magnification 5 (configuration 2) • Slit mirrors imagery with magnification 1 (configuration 1) • Slit mirrors imagery with magnification 5 (configuration 2) • Exit pupil imagery (configuration 3) JWST/IFS prototype progress meeting n°3 LAM - Marseille

  41. Incident collimated beam Camera objective 1 Slit mirrors CCD detector Slices Pupil mirrors Folding mirror Reimaging mirror Detection unit configuration 1 (Gy = 1) JWST/IFS prototype progress meeting n°3 LAM - Marseille

  42. 2.754 mm (in slit mirrors and in detector plane) Detection unit configuration 1 (Gy = 1) • Used for length and relative positioning measurements of the slices images on slit mirrors • Slice image length: about 2.5 mm • 1% of the slice image length is 25 µm (3 pixels) • Measurement precision < 1% • Used for the stray light measurement JWST/IFS prototype progress meeting n°3 LAM - Marseille

  43. Incident collimated beam Camera objective 2 Camera objective 1 Slit mirrors Slices Pupil mirrors CCD detector Reimaging mirror Folding mirror Detection unit configuration 1 (Gy = 5) JWST/IFS prototype progress meeting n°3 LAM - Marseille

  44. 13.77 mm in the detector plane 2.754 mm in the slit mirrors plane A C E B D F Detection unit configuration 2 (Gy = 5) • Used for slice image position, length, width and distortion measurements • Slice image width: about 100 µm (500 µm on the detector) • 1% of the slice image width is 5 µm (1/2 pixels) • Width measurement precision < 3% • An image positioning error of 30 µm corresponds to 17 pixels • Positioning measurement precision >10 times the tolerance value JWST/IFS prototype progress meeting n°3 LAM - Marseille

  45. Detection unit configuration 2 (Gy = 5) • Used for PSF measurement • Radius encircling 80% energy : 15 µm (150 µm diameter in CCD plane) • Thin band spectral filter at 0.6 µm and 1 µm • PSF measurement precision : 10 % • Used for imagery of the pupil mirrors plane • Steering mirror adjustment • Dummy slit mirror line as folding mirror • Medium positioning measurement precision by direct observation • High positioning measurement precision with the camera JWST/IFS prototype progress meeting n°3 LAM - Marseille

  46. Incident collimated beam Camera objective 1 CCD detector Slit mirrors Slices Pupil mirrors Reimaging mirror Folding mirror Detection unit configuration 3 • Used for exit pupil measurements • Camera objective (f50) focused at infinity • Pupil diameter :10mm (on the detector) • High precision of dimension and relative locations JWST/IFS prototype progress meeting n°3 LAM - Marseille

  47. Light Source Support table of the optical tests Illumination Unit Collimator Detection Unit Camera objective 1 CCD Matrix Camera objective 2 Prototype Unit Experimental protocol set up Optical scheme JWST/IFS prototype progress meeting n°3 LAM - Marseille

  48. Experimental protocol set up Process • Assembly of each unit • Internal adjustment of each unit • Calibration of the detection and illumination units • Global adjustment of the three units JWST/IFS prototype progress meeting n°3 LAM - Marseille

  49. Principle of the prototype unit adjustment • Internal assembly and adjustment • Prototype exit optical axis parallel to the table plane • Prototype unit orientation adjustment for the tests JWST/IFS prototype progress meeting n°3 LAM - Marseille

  50. Principle of the detection unit set up • Description of the detection unit • Internal alignment • Focus and calibration • Global orientation adjustment for the tests JWST/IFS prototype progress meeting n°3 LAM - Marseille

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