Lens design for a white-light cosine-transform achromat

Details Lens design for a white-light cosine-transform achromat Lens design for a white-light cosine-transform achromat

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apopt..34..128f&link_type=abstract

Applied Optics, Volume 34, Issue 1, January 1, 1995, pp.128-137

Physics

Optics

Optical Design, Lenses, Transforms

Scientific paper

We describe the lens design for a twin-imaging white-light interferometer in which the interference pattern at the exit-pupil plane is the cosine transform of the spatial-intensity distribution of the object. The achromatic condition in terms of optical power is derived. The analysis of the transform aberration shows that the even aberrations, e.g., spherical aberration and field curvature, do not degrade the cosine transform and need not be corrected. This significant simplification permits us to design systems with good performance and uncomplicated lens structures. We present a lens design with three elements and a length of 320 mm. The system is capable of resolving more than 106 pixels with an operating spectral bandwidth of 100 nm. The results of an experiment with an early four-element design are also presented.

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