magnifying glass(redirected from Optical device - hand lens)
Also found in: Dictionary, Thesaurus.
magnifying glass:see microscopemicroscope,
optical instrument used to increase the apparent size of an object. Simple Microscopes
A magnifying glass, an ordinary double convex lens having a short focal length, is a simple microscope. The reading lens and hand lens are instruments of this type.
..... Click the link for more information. .
magnifying glass[′mag·nə‚fī·iŋ ‚glas]
Any device that uses a simple lens which enlarges the object being viewed.
traditional detective equipment; from its use by Sherlock Holmes. [Br. Lit.: Payton, 473]
magnifying glass, magnifier
a convex lens used to produce an enlarged image of an object