Space Telescope Science Institute  Part II:  User's Guide  4.1 Filters & Optical Elements

Chapter 4:
Imaging


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

This chapter contains the description of the NICMOS filters and optical elements. The NICMOS focus history, image quality, encircled energy, Point Spread Functions, and the NIC3 performance are also presented. The photometric performance of the instrument, together with issues regarding both photon and cosmic ray persistence, are discussed. Finally, the background seen by NICMOS is described. Additional considerations regarding the special modes (coronagraphy, polarimetry and grism spectroscopy), are reported in Chapter 5.


Part II:  User's Guide  4.1 Filters & Optical Elements
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