Aluminized screen may refer to a type of cathode ray tube (CRT) for video display or to a type of projection screen for showing motion pictures or slides, especially in polarized 3D.
A diagram of a CRT showing the aluminium layer behind the phosphors
Some cathode ray tubes, e.g., television picture tubes, include a thin layer of aluminium deposited on the back surface of their internal phosphor screen coating. Light from an excited area of the phosphor which would otherwise wastefully shine back into the tube, is instead reflected forward through the phosphor coating, increasing the total visible light output by around a factor of two. As well it prevents physical phosphors degradation, "phosphor poisoning", increasing the longevity of the device, and it may also act as a heat sink.[1] The aluminium layer must be thick enough to reflect light efficiently, yet not so thick as to absorb too great a proportion of the electron beam that excites the phosphor.
Some projection screens have an aluminized surface, usually an aluminium paint rather than a metal sheet.[2] They reflect polarized light without altering its polarization. This is necessary when showing 3D films as left-eye and right-eye views are superimposed but oppositely polarized (typically at opposite 45 degree angles to the vertical if linearly polarized, right-handed and left-handed if circularly polarized). Audience members wear polarized glasses that allow only the correct image to be seen by each eye.[3]
Referencesedit
^D. Bolum (1 July 1970). (PDF). NASA. p. 26. Archived from the original on 11 July 2023. Retrieved 11 July 2023.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
^Robert J. Klaiber (1966). Physical and Optical Properties of Projection Screens. Naval Training Device Center.
^Lee, Jong Min; MacLachlan, James; Wallace, William A. (1986). "The Effects of 3D Imagery on Managerial Data Interpretation". MIS Quarterly. 10 (3). Management Information Systems Research Center, University of Minnesota: 257–269. ISSN 0276-7783. JSTOR 249259.
This engineering-related article is a stub. You can help Wikipedia by expanding it.
aluminized, screen, refer, type, cathode, tube, video, display, type, projection, screen, showing, motion, pictures, slides, especially, polarized, diagram, showing, aluminium, layer, behind, phosphors, some, cathode, tubes, television, picture, tubes, include. Aluminized screen may refer to a type of cathode ray tube CRT for video display or to a type of projection screen for showing motion pictures or slides especially in polarized 3D A diagram of a CRT showing the aluminium layer behind the phosphors Some cathode ray tubes e g television picture tubes include a thin layer of aluminium deposited on the back surface of their internal phosphor screen coating Light from an excited area of the phosphor which would otherwise wastefully shine back into the tube is instead reflected forward through the phosphor coating increasing the total visible light output by around a factor of two As well it prevents physical phosphors degradation phosphor poisoning increasing the longevity of the device and it may also act as a heat sink 1 The aluminium layer must be thick enough to reflect light efficiently yet not so thick as to absorb too great a proportion of the electron beam that excites the phosphor Some projection screens have an aluminized surface usually an aluminium paint rather than a metal sheet 2 They reflect polarized light without altering its polarization This is necessary when showing 3D films as left eye and right eye views are superimposed but oppositely polarized typically at opposite 45 degree angles to the vertical if linearly polarized right handed and left handed if circularly polarized Audience members wear polarized glasses that allow only the correct image to be seen by each eye 3 References edit D Bolum 1 July 1970 High contrast cathode ray tube Engineering report PDF NASA p 26 Archived from the original on 11 July 2023 Retrieved 11 July 2023 a href Template Cite web html title Template Cite web cite web a CS1 maint bot original URL status unknown link Robert J Klaiber 1966 Physical and Optical Properties of Projection Screens Naval Training Device Center Lee Jong Min MacLachlan James Wallace William A 1986 The Effects of 3D Imagery on Managerial Data Interpretation MIS Quarterly 10 3 Management Information Systems Research Center University of Minnesota 257 269 ISSN 0276 7783 JSTOR 249259 nbsp This engineering related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Aluminized screen amp oldid 1204125292, wikipedia, wiki, book, books, library,
