Topic
Angular aperture
About: Angular aperture is a research topic. Over the lifetime, 1771 publications have been published within this topic receiving 27257 citations.
Papers published on a yearly basis
Papers
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04 Nov 1991TL;DR: A large-aperture lens system with a lens having aspherical surfaces to read out optical information and to be used in optical communication transmission systems or the like is described in this article.
Abstract: A large-aperture lens system with a lens having aspherical surfaces to be used to read out optical information and to be used in optical communication transmission systems or the like The lens in the system has a large aperture despite its very small focal length, because it is manufactured using glass with both a high refractive index and a high Abbe number giving the lens excellent aberration characteristics The system can be manufactured using ultra-precision press-molding technology
5 citations
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23 Aug 1991TL;DR: In this paper, a high aperture finite conjugate lens suitable for use in applications requiring high numerical aperture on both object and image sides of the lens such as laser thermal printer system was proposed.
Abstract: A high aperture finite conjugate lens suitable for use in applications requiring high numerical aperture on both object and image sides of the lens such as laser thermal printer system.
5 citations
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07 Apr 2000TL;DR: In this paper, an apparatus for projection lithography with at least one magnetic doublet lens is described, and two magnetic clamps are configured to prevent substantial overlap of the magnetic lens fields.
Abstract: An apparatus for projection lithography is disclosed. The apparatus has at least one magnetic doublet lens. An aperture scatter filter is interposed between the two lenses of the magnetic doublet lens. The aperture scatter filter is in the back focal plane of the magnetic doublet lens system, or in an equivalent conjugate plane thereof. The apparatus also has two magnetic clamps interposed between the two lenses in the magnetic doublet lens. The clamps are positioned and configured to prevent substantial overlap of the magnetic lens fields. The magnetic clamps are positioned so that the magnetic fields from the lenses in the magnetic doublet lens do not extend to the aperture scatter filter.
5 citations
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09 Jun 2007TL;DR: In this paper, the transducer with the step width is to be wide than the conventional model for strong tolerance against the aperture offset in the fabrication in terms of the reflection, which has small effect by the offset.
Abstract: We have proposed the transducer with the step width is to be wide than the conventional model for strong tolerance against the aperture offset in the fabrication in terms of the reflection. For the model where the step length is 1.5 wavelengths, it has small effect by the aperture offset. We will confirm it by an experiment
5 citations