View example sentences, synonyms and word forms for Lens.
Lens meaning
An object, usually made of glass, that focuses or defocuses the light that passes through it. | A device which focuses or defocuses other waves or radiation, such as microwave radiation, electron beams, sound waves (acoustic lenses), or explosions (explosive lenses). | A convex shape bounded by two circular arcs, joined at their endpoints, the corresponding concave shape being a lune.
Example sentences (20)
For a lens in air, f is then given by : sfn Imaging properties As mentioned above, a positive or converging lens in air focuses a collimated beam travelling along the lens axis to a spot (known as the focal point ) at a distance f from the lens.
If the lens is biconcave or plano-concave, a collimated beam of light passing through the lens is diverged (spread); the lens is thus called a negative or diverging lens.
Likewise, it appears to a subsequent lens as if it were an object at that location, so that second lens could again focus that light into a real image, S 1 then being measured from the virtual image location behind the first lens to the second lens.
The lens plane is a plane parallel to the image plane at the lens; all rays pass through a single point on the lens plane, namely the lens itself.
Twin-lens reflex cameras use an objective lens and a focusing lens unit (usually identical to the objective lens.) in a parallel body for composition and focusing.
The Google Pixel Fold is also equipped with a triple-lens camera array, specifically a 48MP main camera with a 10.8MP telephoto lens and a 10.8MP ultrawide lens.
For instance, the telephoto lens has the full-frame equivalency of a 70mm lens -- meaning it's actually a telephoto lens!
Aperture control Most SLR cameras provide automatic aperture control, which allows viewing and metering at the lens's maximum aperture, but stops the lens down to the working aperture during exposure, and returns the lens to maximum aperture afterwards.
Because the viewfinder and the film lens cannot share the same optical path, the viewing lens is aimed to intersect with the film lens at a fixed point somewhere in front of the camera.
Close-up view of a flat Fresnel lens A Fresnel lens has its optical surface broken up into narrow rings, allowing the lens to be much thinner and lighter than conventional lenses.
Examples include the Einzel lens, the Barrel lens, Agilent's Omega Lens Kenichi Sakata et al., Inductively coupled plasma mass spectrometer and method, US patent 6265717 B1.
Extracting fresh water from a lens for human consumption requires careful calculation of the sustainable yield of the lens by season because each lens is susceptible to corruption by salt-water intrusion caused by overuse or drought.
If the lens is biconvex or plano-convex, a collimated beam of light passing through the lens converges to a spot (a focus) behind the lens.
Incoming parallel rays are focused by a converging lens onto a spot one focal length from the lens, on the far side of the lens.
Rays from an object at finite distance are focused further from the lens than the focal distance; the closer the object is to the lens, the further the image is from the lens.
Stanley Kubrick chose to use the large Fairchild-Curtis lens to shoot the HAL 9000 POV shots because he needed a wide-angle fisheye lens that would fit onto his shooting camera, and this was the only lens at the time that would work.
An executive lens is a bifocal that goes across all of the lens area and is not confined to a small box or area.
But now the lens is working again as the motor has been overhauled along with the lens and the lamp.
By connecting Office Lens with Dropbox, you can seamlessly integrate the scanning capabilities of Office Lens with the file management and collaboration features of Dropbox.
During cataract surgery, the natural lens is removed, and an artificial lens is implanted in its place.