The present invention relates to a screen magnifying glass built into a mobile phone, which is easy to carry, store, and use, wherein the screen magnifying glass and the mobile phone are formed into a unitary body to enable the screen magnifying glass to be conveniently extracted from a ...
“magnifying glass” effect) of the lens on the beam under consideration: if it is positive, the lens has a converging effect on the beam; if it is negative, the effect on the beam is diverging. The point of the lens where the magnifying glass effect is zero (i.e., for a lens ...
The invention relates to a device which is simple and quick to make, enabling a strip magnifying lens to be moved translationally on an inclinable board. A system for attaching the document to be read is provided in the region of the upper portion of the board. It consists of a board 3...
Light from a light source 46 passes through the chart, is magnified by the magnifying lens system 47 and is reflected by mirrors 48 or the equivalent to the screen 36. All of the structure so described is contained 6& within the housing 32 and is therefore inaccessible to the operator ...
This is effected by the original and copy having either, as stated, a common transparent support or two synchronously operating supports, and said support or supports being at both sides of the photographic lens at a distance of twice the focal length of the lens. In consequence of this ...
e., visible to the naked eye or with a lens of very slight magnifying power. In our product, substantially all the particles pass through a 20-mesh screen (opening .833 mm.) and at least 85%, preferably 90%, of the mass consists of particles which are retained on a 60mesh screen ...