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Foveated, wide field-of-view imaging system using a liquid crystal spatial light modulator

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Abstract

The field-of-view (FOV) of a simple imaging system can be dramatically improved using a liquid crystal spatial light modulator (SLM). A SLM can be used to correct the off-axis aberrations that often limit the useful FOV of an imaging system giving near diffraction-limited performance at much larger field angles than would otherwise be possible. Foveated imaging refers to the variation in spatial resolution across the image caused by using the SLM in this application, and it is useful in reducing bandwidth requirements for data transmission.

©2001 Optical Society of America

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Figures (5)

Fig. 1.
Fig. 1. Optical layout for fast imaging system (f/# = 2.4) with a +/-45o field-of-view
Fig. 2.
Fig. 2. Foveated image created from an aerial picture of airport
Fig. 3.
Fig. 3. OPD ray fans with no correction on the SLM at (a) 0° and (b) 45°
Fig. 4.
Fig. 4. OPD ray fans with correction on the SLM for 45° at (a) 0° and (b) 45°
Fig. 5.
Fig. 5. OPD ray fans with correction on the SLM for 0° at (a) 0° and (b) 45°
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