Space Telescope Science Institute   4.4.1 MAMA Properties  4.4.3 Optical Performance

4.4.2 SBC Spectral Response


The spectral response of the unfiltered SBC is illustrated in Figure 4.14. The peak photocathode response occurs at Lyman-. Its spectral response is defined by the cutoff of the MgF2 window at 1150 Å at short wavelengths, and by the relatively steep decline of the CsI photocathode at long wavelengths. Out-of-band QE at longer wavelengths (> 4000 Å) is < 10-8, yielding excellent solar-blind performance.

Figure 4.14: ACS SBC detector quantum efficiency.

 

 4.4.1 MAMA Properties  4.4.3 Optical Performance
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