1. PACS IHDR 12/13 Nov 2003 PACS FPU Optics: Concept and Alignment R. Graue, D. Kampf Kayser-Threde

2. PACS IHDR 12/13 Nov 2003 PACS FPU Optics Concept - Overview Optical Layout unchanged compared to IIDR Optical analyses and documentation completed –Alignment plan –Straylight analyses –Optical Performance analyses (Ray tracing, spot diagrams) –Mirror fabrication data package

3. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Tasks Optical axis of telescope to FPU (alignment cubes/mirrors) Top Optics with Calibration Sources and Chopper Slicer optics Spectrometer/Collimator optics with Grating Assembly Dummy, Dichroic, FW1, Ge:Ga Detectors Bolometer optics with Dichroic, FW2 Integration of bolometer assembly (CEA)

4. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Laser Battery (AKF) at Telescope secondary mirror Laser battery OB simulator Top Optics

5. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Top Optics at OB with alignment cube and mirror Top Optics side view Chopper Internal aperture stop

6. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Top Optics without OB from rear Intermediate Focal plane

7. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Bolometer alignment Laser diode setup Pinholes at focal plane for laser OR LED‘s

8. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Bolometer alignment jig for filter wheel and focal planes

9. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Slicer alignment together with Top Optics Focal Plane

10. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Plan Collimator Alignment Laser & LED Source

11. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment procedure (first page only)

12. PACS IHDR 12/13 Nov 2003 PACS FPU Autocollimation of Alignment Tool

13. PACS IHDR 12/13 Nov 2003 PACS FPU Top Optics Centered

14. PACS IHDR 12/13 Nov 2003 PACS FPU Final Alignment

15. PACS IHDR 12/13 Nov 2003 PACS FPU Laser test set up

16. PACS IHDR 12/13 Nov 2003 PACS FPU Top Optic Set Up

17. PACS IHDR 12/13 Nov 2003 PACS FPU Top Optics Alignment Set Up

18. PACS IHDR 12/13 Nov 2003 PACS FPU Top Optics Alignment Set Up

19. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment

20. PACS IHDR 12/13 Nov 2003 PACS FPU OGSE Overview Status OGSE design and procurement nearly completed (Spectrometer: until end of Nov 2003) Procured OGSE Items Autocollimation telescope Optical mounts 4 x CCD array with optics PC with framegrabber 2 x alignment telescope 10 x HeNe Laser and laser diodes Set of pinholes with LED's (point sources) Support structure for pinholes Masks for mirrors (plexiglas with 3 point orientation to the front surface) Scatter-plates Lateral translation stages 2 x Rotary table Alignment mirrors during alignment (temporary) Alignment mirrors for FPFPU alignment Pentaprism

21. PACS IHDR 12/13 Nov 2003 PACS FPU Alignment Status Updated Alignment plan issued Alignment procedure engineering completed Top Optic Alignment under progress (until mid of Nov.2003) –Chopper, Calibration Sources, Alignment Cubes aligned Top Optics Stability test under Helium temperatures in KT Cryostat after Top Optic alignment Slicer, Collimator, Bolometer, Spectrometer alignment until X-mas 2003