- concave lenses
- • вдлъбната леща
English-Bulgarian polytechnical dictionary . 2013.
concave lenses
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Lenses — Lens Lens (l[e^]nz), n.; pl. {Lenses} ( [e^]z). [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. {Lentil}.] (Opt.) A piece of glass, or other transparent substance, ground with two… … The Collaborative International Dictionary of English
concave — /ˈkɒnkeɪv / (say konkayv), /kɒnˈkeɪv/ (say kon kayv) adjective 1. curved like the interior of a circle or hollow sphere; hollow and curved, especially of optical lenses and mirrors. 2. Obsolete hollow. –noun 3. a concave surface, part, line, etc …
Contact lenses — Lentilles de contact Verres de contact posés avec la face concave vers le haut … Wikipédia en Français
concavo-concave — [kän kā′vō kän kāv′] adj. concave on both sides, as some lenses … English World dictionary
plano-concave — /pleɪnoʊ ˈkɒnkeɪv/ (say playnoh konkayv) adjective (of lenses) plane on one side and concave on the other …
Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra … Wikipedia
Lens — The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil … Medical dictionary
History of the telescope — The earliest known working telescopes appeared in 1608 and are credited to Hans Lippershey and Zacharias Janssen, spectacle makers in Middelburg, and Jacob Metius of Alkmaar. The design of these early refracting telescopes consisted of a convex… … Wikipedia
Eyepiece — For the device for looking through a camera, see viewfinder. A collection of different types of eyepieces. An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is… … Wikipedia
Optics — For the book by Sir Isaac Newton, see Opticks. Optical redirects here. For the musical artist, see Optical (artist). Optics includes study of dispersion of light. Optics is the branch of … Wikipedia
Timeline of telescope technology — Timeline of telescope technology* c.2560 BC c.860 BC Egyptian artisans polish rock crystal, semi precious stones, and latterly glass to produce facsimile eyes for statuary and mummy cases. The intent appears to be to produce an optical illusion.… … Wikipedia
