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- An optical apparatus which produces an intermittent light. *a. by an optical system producing pencil beams which revolve about a vertical axis.789 bytes (112 words) - 11:01, 1 March 2009
- 1. The operation of placing a point object at the focus of an optical apparatus. ...operation of placing a light source about or near the focus of an optical apparatus in such a way as to produce a desired light distribution.439 bytes (62 words) - 03:58, 3 February 2024
- Light issuing from a source or optical apparatus in undesired directions. [[Category:2.2 Optical Apparatus]]373 bytes (51 words) - 11:01, 1 March 2009
- {{languages|Optical Glass}} [[Category:2.2 Optical Apparatus]]312 bytes (39 words) - 11:01, 1 March 2009
- ...tem light emitted by the light source in directions other than that of the optical system, so as to increase the luminous intensity or the angle of divergence [[Category:2.2 Optical Apparatus]]438 bytes (65 words) - 11:01, 1 March 2009
- The property of those optical elements which alter the direction of a light ray from its original directi [[Category:2.2 Optical Apparatus]]355 bytes (45 words) - 20:55, 2 February 2024
- Optical Axis (of a lens, other than a fixed lens, or of a focusing reflector) {{languages|Optical Axis}}400 bytes (55 words) - 13:09, 3 February 2024
- Glass (or plastic) formed into the shape required for optical purposes by allowing it to solidify from the molten state in a suitably sha [[Category:2.2 Optical Apparatus]]376 bytes (51 words) - 11:01, 1 March 2009
- The horizontal plane through the focus of the optical apparatus of the light. [[Category:2.2 Optical Apparatus]]508 bytes (73 words) - 03:58, 3 February 2024
- A lens (in sense 2 of 2-2-010) in which the optical elements are assembled in a common supporting frame. [[Category:2.2 Optical Apparatus]]357 bytes (47 words) - 00:14, 2 February 2024
- The property of those optical elements which alter the direction of a light ray from its original directi [[Category:2.2 Optical Apparatus]]468 bytes (67 words) - 11:01, 1 March 2009
- The cross-section of the lens by a given plane containing the optical axis (2-2-110). [[Category:2.2 Optical Apparatus]]330 bytes (44 words) - 16:22, 3 February 2024
- ...convex in section, the optical axis (2-2-110) of which coincides with the optical axis of the prismatic lens of which it forms a part. [[Category:2.2 Optical Apparatus]]470 bytes (67 words) - 20:35, 2 February 2024
- The plane normal to the optical axis of the lens or reflector and containing the focus. [[Category:2.2 Optical Apparatus]]370 bytes (50 words) - 03:58, 3 February 2024
- [[Category:2.2 Optical Apparatus]]239 bytes (29 words) - 11:01, 1 March 2009
- ...ric (2-2-060) and catadioptric (2-2-070) rings, usually forming part of an optical panel or a drum lens. [[Category:2.2 Optical Apparatus]]575 bytes (88 words) - 11:01, 1 March 2009
- An assembly of one or more optical panels revolving about a vertical axis, and intended to produce a flashing [[Category:2.2 Optical Apparatus]]401 bytes (54 words) - 12:45, 4 February 2024
- Glass formed, after solidification, into the shape required for optical purposes by cutting roughly to shape initially and subsequently shaping acc [[Category:2.2 Optical Apparatus]]508 bytes (63 words) - 04:11, 3 February 2024
- The property of those optical elements which alter the direction of a light ray from its original directi [[Category:2.2 Optical Apparatus]]492 bytes (67 words) - 20:54, 2 February 2024
- A transparent optical element of prismatic section, having plane or curved faces, placed in the p [[Category:2.2 Optical Apparatus]]486 bytes (65 words) - 02:55, 3 February 2024
- [[Category:2.2 Optical Apparatus]]264 bytes (36 words) - 11:01, 1 March 2009
- A prismatic lens obtained by the rotation of a Fresnel profile about the optical axis of the lens (Fresnel Panel), or about a vertical axis (Fresnel Drum Le [[Category:2.2 Optical Apparatus]]411 bytes (56 words) - 04:02, 3 February 2024
- ...ismatic lens obtained by the rotation of an equi-angular profile about the optical axis of the lens. In such a lens, the bullseye and rings usually present a [[Category:2.2 Optical Apparatus]]424 bytes (57 words) - 03:24, 3 February 2024
- ...source placed at the focus of the paraboloid are rendered parallel to the optical axis (2-2-110) after reflection. [[Category:2.2 Optical Apparatus]]508 bytes (71 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]307 bytes (37 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]251 bytes (33 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]395 bytes (48 words) - 18:54, 8 July 2016
- [[Category:2.2 Optical Apparatus]]276 bytes (33 words) - 13:11, 3 February 2024
- [[Category:2.2 Optical Apparatus]]352 bytes (48 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]343 bytes (42 words) - 20:06, 8 July 2016
- [[Category:2.2 Optical Apparatus]]352 bytes (45 words) - 02:53, 3 February 2024
- [[Category:2.2 Optical Apparatus]]332 bytes (42 words) - 02:59, 3 February 2024
- Note: In France, the subtense angle of an optical panel, measured in the horizontal plane, is called Ouverture. In Germany, the subtense angle of a fixed lens or of an optical panel, measured in the horizontal plane, is called Spannwinkel.672 bytes (102 words) - 20:07, 8 July 2016
- {{languages|Optical Panel}} [[Category:2.2 Optical Apparatus]]613 bytes (86 words) - 13:10, 3 February 2024
- [[Category:2.2 Optical Apparatus]]414 bytes (56 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]365 bytes (43 words) - 12:46, 4 February 2024
- [[Category:2.2 Optical Apparatus]]448 bytes (61 words) - 11:01, 1 March 2009
- 2. Frequently used in a more general sense for an assembly of optical elements which have a common focus. For examples, see 2-2-085, 2-2-090, 2-2 [[Category:2.2 Optical Apparatus]]658 bytes (92 words) - 04:45, 3 February 2024
- [[Category:2.2 Optical Apparatus]]389 bytes (51 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]370 bytes (51 words) - 00:27, 2 February 2024
- [[Category:2.2 Optical Apparatus]]314 bytes (42 words) - 16:22, 3 February 2024
- [[Category:2.2 Optical Apparatus]]411 bytes (52 words) - 17:34, 7 February 2024
- [[Category:2.2 Optical Apparatus]]407 bytes (57 words) - 11:01, 1 March 2009
- ...house practice, the term is also used for a cross-section of a transparent optical element bounded by three straight or slightly curved sides, approximating t [[Category:2.2 Optical Apparatus]]705 bytes (102 words) - 11:01, 1 March 2009
- A transparent optical element, usually of glass or plastic, bounded by at least two planes inters [[Category:2.2 Optical Apparatus]]671 bytes (98 words) - 16:21, 3 February 2024
- [[Category:2.2 Optical Apparatus]]450 bytes (59 words) - 03:24, 3 February 2024
- [[Category:2.2 Optical Apparatus]]427 bytes (58 words) - 20:21, 2 February 2024
- An optical apparatus consisting of a light source and optically refracting or reflecting element [[Category:2.2 Optical Apparatus]]931 bytes (136 words) - 16:23, 3 February 2024
- ...lens or reflector between the focus and (in practice) the point where the optical axis intersects the nearer surface of the lens or reflector. [[Category:2.2 Optical Apparatus]]823 bytes (126 words) - 03:57, 3 February 2024
- [[Category:2.2 Optical Apparatus]]467 bytes (64 words) - 04:01, 3 February 2024
- [[Category:2.2 Optical Apparatus]]483 bytes (70 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]521 bytes (74 words) - 11:01, 1 March 2009
- [[Category:2.2 Optical Apparatus]]509 bytes (75 words) - 02:54, 3 February 2024
- [[Category:2.2 Optical Apparatus]]570 bytes (79 words) - 04:02, 3 February 2024
- [[Category:2.2 Optical Apparatus]]545 bytes (82 words) - 01:26, 3 February 2024
- [[Category:2.2 Optical Apparatus]]666 bytes (108 words) - 03:58, 3 February 2024
- [[Category:2.2 Optical Apparatus]]724 bytes (119 words) - 03:34, 3 February 2024
- [[Category:2.2 Optical Apparatus]]1 KB (153 words) - 13:11, 3 February 2024