Hubble Space Telescope
FOC Instrument Handbook Version 5.0 List of Figures

List of Figures

Figure 1. COSTAR correction principle for pre-COSTAR f/96 relay - 3

Figure 2. COSTAR deployed showing FOC light path - 5

Figure 3. FOC Operational and Data Flow Block Diagram - 7

Figure 4. A Schematic Drawing of the FOC - 8

Figure 5. The Transfer Optics Block Diagram - 13

Figure 6. The Schematic Optical Layout for the New Cameras - 14

Figure 7. Location of the FOC Entrance Apertures on HST Focal Plane - 16

Figure 8. The New f/96 Camera Entrance Aperture - 17

Figure 9. The New f/48 Camera Entrance Aperture - 18

Figure 10. Normalized Emission Spectra of the Calibration LEDs - 20

Figure 11. Transmittance of the Long Pass and Wide Band Filters for the New f/96 relay - 24

Figure 12. Transmittance of the Visible, Medium and Narrow Band Filters for the New f/96 Relay - 25

Figure 13. Transmittance of the UV Medium Band Filters for the New f/96 Relay - 26

Figure 14. Transmittance of the Neutral Density Filters for the New f/96 Relay - 27

Figure 15. Transmittance of all the Filters for the New f/48 Relay - 28

Figure 16. Optical Layout of the Focal Plane of the New f/96 Relay with the Objective Prism - 32

Figure 17. The Physical Layout of the FOC Polarizers - 32

Figure 18. Image Configurations on the Focal Plane of the New f/96 Relay for the Polarizers - 33

Figure 19. Transmittance of the Polarizers - 33

Figure 20. Optical Layout of the Focal Plane for the New f/48 Relay with the FOPCD - 36

Figure 21. Physical Layout of the Imaging Photon Counting Detectors - 37

Figure 22. Typical Raster Scan Output of the Detectors - 39

Figure 23. Radial profiles of pre-COSTAR aberrated PSF and COSTAR-corrected PSF - 47

Figure 24. The encircled energy fraction and PSF profile for the COSTAR-corrected f/96 and pre-COSTAR f/96 relays - 49

Figure 25. Images of PSFs taken with the COSTAR-corrected f/96 camera through the F486N, F120M, and F372M filters - 50

Figure 26. Flat-field Linearity Plots for Both Relays - 53

Figure 27. Point Source Non-linearity Characteristics - 53

Figure 28. Baseline Overall (OTA+COSTAR+FOC) Central Absolute Quantum Efficiency - 56

Figure 29. Increase in the background count rate over time in the new F/48 relay - 60

Figure 30. Stray Light Illumination in V Magnitudes - 61

Figure 31. The Earth's Average Daylight Nadir Radiance in Rayleighs - 62

Figure 32. Plot of Vignetting Function for the Extended Format for the New f/48 Relay - 65

Figure 32. Plot of Vignetting Function Along the Spectrographic Slit - 65

Figure 33. Contour Plots of Flat Field Images for the New Relays - 65

Figure 34. Plot Across a Row of UV Flat Field Images for the New Relays - 67

Figure 35. Ratio of External to Internal Flat Field Images for the New f/48 and the New f/96 Relays - 67

Figure 36. The Expected Monochromatic Count Rate for the New f/96 Camera - 69

Figure 37. The Overall (Optical + Detector) Distortion Field for the New f/48 Relay - 71

Figure 38. The Overall (Optical + Detector) Distortion Field for the New f/96 Relay. - 71

Figure 39. Residual 1216 and 1304 Airglow Contribution - 76

Figure 40. Zodiacal Light Contribution to the FOC Background Counting Rate - 77

Figure 41. Exposure Time Required to Reach S/N = 10 (point source) - 86

Figure 42. Exposure Time Required to Reach S/N = 10 (extended source) - 86

Figure 43. Flow Diagram of the FOC Imaging Data - 89

Figure A1. Extended Format (512) pre-COSTAR f/48 Image - 92

Figure A2. Extended Format pre-COSTAR f/96 Image - 93

Figure A3. Extended Format pre-COSTAR f/48 Spectrographic Image - 94

Figure A4. 512 Format pre-COSTAR F/96 Far-UV Objective Prism Image - 95

Figure A5. Extended Format pre-COSTAR f/48 Image Showing - High Background Features - 96

List of Tables

Table 1. Summary of FOC Performance Characteristics I. Imaging - 10

Table 2. Summary of FOC Performance Characteristics II. Spectroscopy - 11

Table 3. The Optical Element Characteristics for the New f/96 Relay - 22

Table 4. The Optical Element Characteristics for the New f/48 Relay - 23

Table 5. FOC Objective Prism Characteristics - 31

Table 6. Standard Imaging, Occultation, and Spectrographic Modes - 42

Table 7. Target Acquisition Formats - 46

Table 8. Measured Energy Fraction for the New f/96 Relay - 48

Table 9. Calculated Flat-Field Linearity Parameters - 52

Table 10. Overall (OTA+COSTAR+FOC) Absolute Quantum Efficiency - 55

Table 11. Format-Dependent Sensitivity Ratios - 58

Table 12. Zodiacal Light Intensities in S10 Units - 75