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Telecentric lenses are used for precision optical two-dimensional measurements, reproduction (e.g., photolithography), and other applications that are sensitive to the image magnification or the angle of incidence of light. The simplest way to make a lens telecentric is to put the aperture stop at one of the lens's focal points.
Image title Comparison of a conventional lens (1), object-space telecentric lens (2), image-space telecentric lens (3) and bi-telecentric lens (4), assuming the images are in sufficient focus by CMG Lee.
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The ability of a lens to resolve detail is usually determined by the quality of the lens, but is ultimately limited by diffraction.Light coming from a point source in the object diffracts through the lens aperture such that it forms a diffraction pattern in the image, which has a central spot and surrounding bright rings, separated by dark nulls; this pattern is known as an Airy pattern, and ...
A telecentric lens design can mitigate this problem, but the sensor remains more sensitive to the angle of incoming light, and has more pronounced image corner light falloff. The resolution of a sensor is often measured as the total sensor pixel count in megapixels, and this is often a primary decision-making factor in choosing a camera ...
Different kinds of camera lenses, including wide angle, telephoto and speciality. A camera lens, photographic lens or photographic objective is an optical lens or assembly of lenses (compound lens) used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.
In optics, a relay lens is a lens or a group of lenses that receives the image from the objective lens and relays it to the eyepiece. Relay lenses are found in refracting telescopes , endoscopes , and periscopes to optically manipulate the light path , extend the length of the whole optical system , and usually serve the purpose of inverting ...
The lens was designed to weigh half a pound to make the camera lighter and more agile. The Illum features a 1,152,000 pixel articulated 4-inch (101.6 mm) LCD touchscreen with a wide aspect ratio. A display overlay shows the photographer the relative focus of all objects in the frame, and which elements are re-focusable.