منابع مشابه
Perfect cylindrical lenses.
A slab of negatively refracting material is known to focus light and if 1 n = the focussing will be perfect, producing an image which is an exact replica of the object. Magnifying the image requires a new design concept in which the surface of the negatively refracting lens is curved. Here we show how a hollow cylinder of material can be designed to magnify an image but otherwise with the same ...
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much like spherical lenses do, but in only one dimension. This makes them useful for altering the proportions of an image, either singly or when used in pairs. They can transform a point image into a line image or change the height of an image without altering its width (or vice versa). Applications of this type include anamorphic beam shaping and correcting the elliptical output of a laser dio...
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Photopolymers are optical recording materials appealing for many different applications such as holography, data storage, interconnectors, solar concentrations, or wave-guides fabrication. Recently the capacity of photopolymers to record diffractive optical elements (DOE’s) has been investigated. Different authors have reported proposes to record DOE like fork gratings, photonics structures, le...
متن کاملAstigmatism in infant monkeys reared with cylindrical lenses
To determine whether developing primate eyes are capable of growing in a manner that eliminates astigmatism, we reared infant monkeys with cylindrical spectacle lenses in front of one or both eyes that optically simulated with-the-rule, against-the-rule, or oblique astigmatism (+1.50-3.00x90, x180, x45 or x135). Refractive development was assessed by retinoscopy, keratometry and A-scan ultrason...
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This paper presents a spectral domain low-coherence interferometry (SD-LCI) method that is effective for applications in on-line surface inspection because it can obtain a surface profile in a single shot. It has an advantage over existing spectral interferometry techniques because it uses cylindrical lenses as the objective lens in a Michelson interferometric configuration to enable the measur...
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ژورنال
عنوان ژورنال: Proceedings of the Physical Society of London
سال: 1899
ISSN: 1478-7814
DOI: 10.1088/1478-7814/17/1/306