The extended hemispherical lens is a commonly used lens for millimeter-wave electromagnetic radiation. Such lenses are typically fabricated from dielectric...
2 KB (157 words) - 01:13, 16 May 2023
equations. An extended hemispherical lens is a special type of plano-convex lens, in which the lens's curved surface is a full hemisphere and the lens is much...
70 KB (8,341 words) - 04:55, 19 December 2024
A fisheye lens is an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image.: 145 Fisheye...
62 KB (6,675 words) - 14:24, 29 November 2024
the catadioptric Fresnel lens for the front hemisphere, but replaced the rear hemispherical reflector with a hemispherical array of annular prisms, each...
57 KB (6,509 words) - 18:35, 24 October 2024
Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used by over...
89 KB (10,793 words) - 20:18, 1 December 2024
Panoramic photography (redirect from Panoramic lens)
a type of lens, but using this lens type does not necessarily make an image a panorama. An image made with an ultra wide-angle fisheye lens covering the...
32 KB (3,718 words) - 02:42, 19 October 2024
A gravitational lens is matter, such as a cluster of galaxies or a point particle, that bends light from a distant source as it travels toward an observer...
51 KB (5,722 words) - 06:42, 1 November 2024
"Closed-Form Relation Between the Scan Angle and Feed Position for Extended Hemispherical Lenses Based on Ray Tracing". IEEE Antennas and Wireless Propagation...
6 KB (668 words) - 05:14, 20 April 2024
the diagonal; it does not provide a complete hemispherical view, and is not suitable for hemispherical photography. "Canon Fisheye EF 15mm f/2.8 discontinued"...
2 KB (165 words) - 12:59, 28 August 2021
century led to an array of lens designs intended for photography. The problems of photographic lens design, creating a lens for a task that would cover...
117 KB (16,176 words) - 14:07, 13 September 2024
determining practical photographic exposure, a hemispherical sensor has proven more effective. With a hemispherical sensor, typical values for C are between...
43 KB (4,174 words) - 01:03, 19 December 2024
Wikipedia (redirect from Extended confirmed protected)
article can be "semi-protected" or "extended confirmed protected", meaning that only "autoconfirmed" or "extended confirmed" editors can modify it. A...
320 KB (27,417 words) - 19:00, 22 December 2024
Cardinal point (optics) (redirect from Centre of the lens)
front focal plane of the lens (or a lens group within the overall lens), and a sufficiently small aperture will make the lens image-space telecentric....
22 KB (2,900 words) - 02:56, 11 September 2024
lens, while a coronal section of its central part presents a somewhat triangular outline. It is shorter than the caudate nucleus and does not extend as...
5 KB (540 words) - 13:55, 20 December 2023
test. Lens fogging technique. The subject fixates a distant object with both eyes open and appropriate correction in place. A +2.00 or +2.50 lens is alternately...
15 KB (1,840 words) - 11:36, 17 July 2024
optical transmission of pure silica extends well into the ultraviolet and infrared wavelengths, so is used to make lenses and other optics for these wavelengths...
21 KB (2,394 words) - 15:12, 19 August 2024
photophores. The mantle of some species is adorned with conical or hemispherical tubercles. Most species have arm suckers that possess sharp or blunt...
10 KB (973 words) - 02:37, 3 December 2023
Flashlight (section Reflectors and lenses)
wide flood or "spill" of light. Because LEDs emit most light in a hemisphere, lens lights with the LED facing forward or reflector lights with it facing...
44 KB (5,742 words) - 02:27, 22 December 2024
Allegheny Observatory (section The Lens-napping)
library, lecture hall, classrooms, laboratories, offices, and three hemispherical domed telescope enclosures. Two were reserved for research; one for...
23 KB (2,042 words) - 15:53, 26 September 2024
with the eye remaining a weak point. The lower shell is covered with hemispherical protrusions. In the BBC-licensed The Dalek Book (1964), and again in...
132 KB (16,079 words) - 12:48, 8 December 2024
camera lens caps not releasing. The Venera 9 lander operated for at least 53 minutes and took pictures with one of two cameras; the other lens cap did...
32 KB (2,548 words) - 19:22, 20 October 2024
Sphere (redirect from Hemispherical)
Manufactured items including pressure vessels and most curved mirrors and lenses are based on spheres. Spheres roll smoothly in any direction, so most balls...
41 KB (5,327 words) - 16:25, 19 December 2024
rating. Some fisheye lenses use a stereographic projection to capture a wide-angle view. Compared to more traditional fisheye lenses which use an equal-area...
49 KB (6,120 words) - 13:24, 23 September 2024
discovered the comet in images he obtained using a 200-mm f/3 telephoto lens mounted on a Canon EOS 6D on 12 August 2023, when the comet was 1.0 AU from...
14 KB (968 words) - 19:18, 16 December 2024
Movie projector (section Reflector and condenser lens)
and extreme wide angle lenses to obtain an almost hemispherical image. The field of view is tilted, as is the projection hemisphere, so one may view a portion...
64 KB (9,656 words) - 02:06, 20 December 2024
consisting of two lenses each 20-inches (50.8 cm) in diameter, one designed for blue light and the other for yellow light. The lenses focus the light separately...
7 KB (832 words) - 12:01, 28 October 2024
is operated by Malin Space Science Systems. It has a 180-degree fisheye lens with the seven color filters bonded directly on a single CCD sensor. MARCI...
9 KB (873 words) - 20:41, 3 February 2023
The Northern Extended Millimeter Array (NOEMA) is one of the largest astronomical facilities on European ground and the most powerful radio telescope in...
6 KB (738 words) - 19:03, 28 February 2024
sphere of influence in the Western Hemisphere, particularly in North America,[failed verification] but this was extended to the Latin American colonies by...
60 KB (6,746 words) - 05:36, 22 November 2024