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19 September 2014 Flat-plate magnifier for magnifying the view of a distant object
Masataka Shirasaki, Takehiro Kodaira, Hiroshi Yamaguchi, Tsuneo Takei
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Optical Engineering, Vol. 53, Issue 9, 095107 (September 2014). https://doi.org/10.1117/1.OE.53.9.095107
Abstract
An optically magnifying device for viewing a distant object is proposed. Since this device can be made in the form of a thin plate and can also have a large viewing area, a flat-plate magnifier is realized. The flat-plate magnifier mounted onto an eyeglass frame as a substitute for each lens provides a light-weight, hands-free magnifier. The flat-plate magnifier is made as a 3 to 4-mm-thick plastic plate and can be made up to 30 to 40 mm in diameter. The flat-plate magnifier is a two-dimensional array of magnifying modules and each magnifying module consists of a micromagnifier and a ray angle adjuster. The micromagnifier comprises a concave mirror and a convex mirror and magnifies the view. The ray angle adjuster is a transparent wedge and expands the viewing area. The flat-plate magnifier is designed so that the achromatic condition is satisfied by cancelling the angular dispersion produced by the micromagnifier with that of the ray angle adjuster. A prototype of the flat-plate magnifier with a diameter of 9 mm and a magnification power of 3 was demonstrated.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Masataka Shirasaki, Takehiro Kodaira, Hiroshi Yamaguchi, and Tsuneo Takei "Flat-plate magnifier for magnifying the view of a distant object," Optical Engineering 53(9), 095107 (19 September 2014). https://doi.org/10.1117/1.OE.53.9.095107
Published: 19 September 2014
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KEYWORDS
Mirrors
Eye
Eyeglasses
Collimation
Optical engineering
Refraction
Telescopes
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