chapter 9, Modulation Photon Transfer

from: Photon Transfer

Author(s): James R. Janesick

Published: 14 August 2007

Chapter DOI: http://dx.doi.org/10.1117/3.725073.ch9

Chapter Page Count: 16 pages

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Front Matter

1. Introduction

2. Photon Interaction

3. Photon Transfer Noise Sources

4. Photon Transfer Theory

5. Photon Transfer Curve

6. e⁻/DN Variance

7. Nonlinearity

8. Flat Fielding

9. Modulation Photon Transfer

10. Signal-to-noise Performance

11. Read Noise

12. Lux Transfer

A. PTC Data Reduction Example

B. PTC Simulation Program with Thermal Dark Current

C. PTC Simulation Program with FPN Removal through Flat Fielding

D. LTC Simulation Program with Thermal Dark Current

Back Matter

Preview

Chapter Contents

9.1 Introduction
9.2 Sinusoidal Signal
9.3 Sinusoidal Noise
9.4 Modulation PTC

Excerpt

9.1 Introduction

Discussions to this point have assumed that a flat-field light source is used to stimulate the detector. This chapter develops PT relations for nonuniform light sources, such as a sinusoidal stimulus. Results derived in this chapter provide significant insight and quantification of S/N performance for images in general, which is discussed in Chapter 10.

9.2 Sinusoidal Signal

Nonuniform light analysis begins by assuming that the detector's output response to a sinusoidal photon input source is described by

where SIN is the pixel signal (e⁻), n_ix is the number of pixels across the array (i.e., n_ix = 1,2,3, etc.), and C_P is the incident “photon contrast” defined by

where S_MAX(P) and S_MIN(P) are the maximum and minimum number of incident photons per pixel. In Eq. (9.1), MTF_D is the pixel's modulation transfer function (MTF) given by

where f_S is the spatial frequency of the sinusoidal input (cycles/cm), p_f is the normalized pixel aperture opening (the ratio of the active pixel opening to the pixel pitch), and f_N is the Nyquist spatial frequency defined by