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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