We present the design and experimental demonstration of an ultrathin four-reflection imager. The F/1.15 prototype imager achieves a focal length of 18.6 mm in a track length of just 5.5 mm, providing a 17 degrees field of view over 1.92 megapixels of a color image sensor with 3 microm pixels. We also present the design and experimental results of pupil-phase encoding and postprocessing, which were applied to extend the depth of field and compensate a small amount of axial chromatic aberration present in the four-reflection imager prototype.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ao.48.000343 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Increased spatial coherence length from an asymmetric crystal reflection at grazing exit.
J Synchrotron Radiat
May 2024
Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
Coherent X-ray imaging is an active field at synchrotron sources. The images rely on the available coherent flux over a limited field of view. At many synchrotron beamlines a double-crystal monochromator (DCM) is employed in a standard nondispersive arrangement.
View Article and Find Full Text PDFRecently, freeform optics has been widely used due to its unprecedented compactness and high performance, especially in the reflective designs for broad-wavelength imaging applications. Here, we present a generalized differentiable ray tracing approach suitable for most optical surfaces. The established automated freeform design framework simultaneously calculates multi-surface coefficients with merely the system geometry known, very fast for generating abundant feasible starting points.
View Article and Find Full Text PDFUltrathin four-reflection imager.
Appl Opt
January 2009
Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, USA.
We present the design and experimental demonstration of an ultrathin four-reflection imager. The F/1.15 prototype imager achieves a focal length of 18.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!