Pinholes meaning
WebA pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole )—effectively a light-proof box with a small hole in one side. Light from a scene … WebFeb 17, 2024 · Pinhole visual acuity. The pinhole is an eye shield with several small holes that allow light rays to reach the retina without the interference of optical problems of the eye. It is an excellent way to screen for uncorrected refractive errors and disorders of the ocular media. However, young children, elderly people, and mentally impaired ...
Pinholes meaning
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Webpinhole noun pin· hole ˈpin-ˌhōl Synonyms of pinhole : a small hole made by, for, or as if by a pin Synonyms perforation pinprick prick punch puncture stab See all Synonyms & … WebMar 15, 2024 · Through a smaller pupil, the effects of minor ocular irregularities—such as refractive error or paracentral cornea or lens opacities—are diminished. The “pinhole effect” is an optical concept suggesting that the smaller the pupil size, the less defocus from spherical aberrations is present.
Webpinhole. ( ˈpɪnˌhəʊl) n. 1. a small hole made with or as if with a pin. 2. (Archery) archery the exact centre of an archery target, in the middle of the gold zone. Collins English Dictionary … Web1 ENTRIES FOUND: pinhole (noun) pinhole / ˈ pɪnˌhoʊl/ noun. plural pinholes. Britannica Dictionary definition of PINHOLE. [count] : a very small hole made by a pin or in some …
WebSep 2, 2024 · A discontinuity in coating, when a part of the surface remains uncoated A defect such as an area of insufficient coating film thickness A pinhole within the coating A crack within the coating An improper adhesion or bonding of the coating It is essential to detect and study a holiday in the protective coating and take urgent corrective measures. Webpinhole / ( ˈpɪnˌhəʊl) / noun a small hole made with or as if with a pin archery the exact centre of an archery target, in the middle of the gold zone Collins English Dictionary - …
Webnoun Definition of pinholes plural of pinhole as in punctures a mark or small hole made by a pointed instrument pinholes in a bedsheet will look like stars if you shine a light from …
WebFeb 28, 2013 · In the U.S., “whore” and “slut” mean much the same thing. 10. Tosser. This term, meaning one who engages in self, erm, stimulation, is a milder version of w**ker, which – perhaps you’ve noticed this too - Americans have recently adopted but serially misuse. north newton school corporation indianaWebfreedom; the concept of waves, focusing on light and sound; phase and group velocities, their physical meaning, and their measurement; diffraction and interference of light; polarization phenomena; and the formation of images in the eye and in optical instruments. The textbook as a whole covers electromagnetism, mechanics, fluids and how to scare off squirrels in atticWebpinhole noun [ C ] (also pin hole) uk / ˈpɪn.həʊl / us / ˈpɪn.hoʊl / a very small hole made by or as if by a pin: He attached his poster to the notice board, careful to use the pinholes that … north newton school corporation morocco inWebDefine pinhole. pinhole synonyms, pinhole pronunciation, pinhole translation, English dictionary definition of pinhole. n. A tiny puncture made by or as if by a pin. north newton school districtWebA pinhole or holiday detector is a non-destructive instrument used for detecting discontinuities in a coating system including holidays, pinholes, and cracks. Other names include porosity detector, continuity tester, holiday tester, spark tester, and jeep meter. DeFelsko offers two types of porosity/pinhole detectors: low voltage (wet sponge ... how to scare off stray catsWebThe name of the term comes from the simple fabrication method of punching a thin metallic plate or foil with a pin. However, precision pinholes for optical applications are normally made by laser drilling . The hole … northnewtonshoot altervista.orgWebpinhole. (pĭn′hōl) [AS. pinn, pin, + hol, hole] A small perforation made by, or the size of that made by, a pin. how to scare off turkey buzzards