Results 241 to 250 of about 221,879 (297)

Ultrahigh-numerical-aperture imaging concentrator

Journal of the Optical Society of America A, 1997
A monochromatic analysis of the RX nonimaging concentrators as imaging optical systems is presented (R stands for refractive, X for reflective). All of them have rotational symmetry and an image-side numerical aperture of 1.46 with the use of an index of refraction n′=1.5, which means a half-rim angle of illumination of 77 deg. This is equivalent to 95%
Pablo Benı́tez, Juan C. Miñano
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High-numerical-aperture scalar imaging

Applied Optics, 2001
The equation for partially coherent high-numerical-aperture scalar imaging was originally derived by Cole et al. [Jpn. J. Appl. Phys. 31, 4110 (1992)]. Here I present an alternative derivation, based on the plane-wave spectral representation of propagation, which can, at least in some respects, be viewed as more straightforward.
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Numerical apertures of light microscope objectives

Journal of Microscopy, 1993
SUMMARYThe numerical aperture of light‐microscope objectives is measured via the exit angle of the rear lens towards the image space, and the magnification of the objective. The method is reliable because of its simplicity and is independent of special instrumentation such as apertometers.
S. Bradbury, P. J. Evennett, J. B. Sanderson, A. Wachtel   +3 more
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High-numerical-aperture optical designs

IBM Journal of Research and Development, 1997
This paper is an overview of the designs of high-numerical-aperture lenses for optical projection lithography at the IBM Thomas J. Watson Research Center.
R. N. Singh, A. E. Rosenbluth, G. L.-T. Chiu, J. S. Wilczynski   +3 more
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Disorder-mediated enhancement of fiber numerical aperture

Optics Letters, 2013
The numerical aperture (NA) of a multimode optical fiber sets the limit of the information transport capacity along the spatial degree of freedom. In this Letter, we report that the application of a highly disordered medium can overcome the capacity limit set by the fiber NA.
Youngwoon, Choi, Changhyeong, Yoon, Moonseok, Kim, Juhee, Yang, Wonshik, Choi   +4 more
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Understanding high numerical aperture optical lithography

Microelectronic Engineering, 1992
Abstract This paper explores fundamental imaging phenomena that become appreciable as the numerical aperture (NA) of imaging lenses increase beyond 0.5. A high NA imaging model is formulated based on plane wave decomposition of the imaging lens exit pupil.
D.G. Flagello, A.E. Rosenbluth, C. Progler, J. Armitage   +3 more
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Macrobending effects on fiber numerical aperture

Journal of Lightwave Technology, 1987
The influence of microbending on the numerical aperture of three sides of optical fiber has been studied. From this, the smallest bending diameter to not have a dramatic effect on numerical aperature has been determined.
null Ying Kiang, T. Klieber
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Search for the optimum numerical aperture

Microelectronic Engineering, 1990
Abstract Results on the dependences of focus and exposure dose latitudes on the numerical aperture of lithographic g-line, i-line, and KrF exposure systems are given for 0.6, 0.8 and 1.0 um lines and spaces. This is done for two different resist systems by both SAMPLE 1.7 simulations and g-line experiments.
Christoph Nölscher, Leonhard Mader, Sabine Guttenberger, Wolfgang Arden   +3 more
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High-numerical-aperture silica core fibers

SPIE Proceedings, 2004
Many medical applications have need of 'broad' irradiation patterns, but benefit from small diameter fibers to provide minimal invasive surgery. These applications also benefit from using the low intrinsic loss character of silica based core material as well as the power capability of a silica/silica construction.
Bolesh J. Skutnik, Brian Foley, Kelly B. Moran   +2 more
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High-numerical-aperture I-line stepper

SPIE Proceedings, 1990
I-line stepper technology is described which features a new generation high NA lens and an improved implementation of a phase grating alignment system. Combining the high NA lens with high contrast resist processing enables O.5um processing to be supported with good process latitude and CD control without adverse effects due to lens heating.
Barton A. Katz, James S. Greeneich, Mark G. Bigelow, Ann Katz, Frits J. van Hout, Jos F. Coolsen   +5 more
openaire   +1 more source