维索莱特放大镜。评估与光学原理。

Visolett magnifier. Evaluation and optics.

作者信息

Fonda G

出版信息

Arch Ophthalmol. 1976 Sep;94(9):1614-5. doi: 10.1001/archopht.1976.03910040444019.

DOI:10.1001/archopht.1976.03910040444019

Abstract

The Visolett is a glass, nonspectacle magnifier that rests on the paper, producing 1.8X to 2.5X magnification. It is one of the most useful nonspectacle magnifiers, because it is simple to use and diffusely concentrates illumination on its own field, enhancing the magnification. The optics differ from usual hand magnifiers in that the magnification does not increase with the dioptric power.

摘要

维索莱特放大镜是一种玻璃材质的非眼镜式放大镜，放置在纸张上时可产生1.8倍至2.5倍的放大效果。它是最有用的非眼镜式放大镜之一，因为其使用简便，能将光线分散聚集在自身视野范围内，增强了放大效果。其光学原理与普通手持放大镜不同，即放大倍数不会随屈光度增加而增大。