Space Telescope Science Institute   3.2 The APT Visual Target Tuner (VTT)  4.1 Filters and Optical Elements

Chapter 4:
Imaging


In this chapter . . .
Filters and Optical Elements
Photometry
Focus History
Image Quality
Cosmic Rays
Photon and Cosmic Ray Persistence
The Infrared Background
The "Pedestal Effect"


 3.2 The APT Visual Target Tuner (VTT)  4.1 Filters and Optical Elements
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