positive lens
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positive lens — noun : a lens that is thickest at its center and thinner toward its outer portions thus causing light which passes through it to converge : converging lens * * * Optics. See converging lens. * * * positive lens, a convex lens that converges light … Useful english dictionary
positive lens — teigiamasis lęšis statusas T sritis fizika atitikmenys: angl. positive lens vok. Positivlinse, f rus. положительная линза, f pranc. lentille positive, f … Fizikos terminų žodynas
Positive — is a property of positivity and may refer to: Mathematics and science * Positive number, a number that is greater than 0 * Positive operator, in functional analysis, a bounded linear operator whose spectrum consists of positive real numbers *… … Wikipedia
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
positive — I. adjective Etymology: Middle English, from Anglo French, from Latin positivus, from positus, past participle of ponere Date: 14th century 1. a. formally laid down or imposed ; prescribed < positive laws > b. expressed clearly or peremptorily … New Collegiate Dictionary
positive — 1. Affirmative; definite; not negative. 2. Denoting a response, the occurrence of a reaction, or the existence of the entity or condition in question. 3. Having a value greater than zero. [L. positivus, settled by arbitrary agreement, fr. pono,… … Medical dictionary
positive spherical aberration — unequal refraction of light rays by a lens, the peripheral rays being focused closer to the lens than the paraxial rays … Medical dictionary
Positive eyepiece — eyepiece eye piece eye piece eye piece , n. (Opt.) The lens, or combination of lenses, at the eye end of a microscope, telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. Syn: ocular.… … The Collaborative International Dictionary of English
positive eyepiece — a single lens combination, consisting of two planoconvex lenses or of an achromatic doublet or triplet, the combination being above the plane in which the real image from the objective is formed … Medical dictionary
positive meniscus — a concavoconvex lens … Medical dictionary
