-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 El 2010-01-05 a las 23:35 -0300, Alfredo Jesús Delaiti escribió:
El 05/01/10 20:48, miguel gmail escribió:
Lo que no entiendo es cómo consiguen que la luz reflejada por la pantalla tenga polarización...
Ingresa a la página de Dolby y te lo explican (no recuerdo la ubicación exacta donde esta, pero es cuestión de buscar).
http://en.wikipedia.org/wiki/3-D_film On December 18, 2009 James Cameron's Avatar was released in traditional 2D, Real D 3D and IMAX 3D. <http://en.wikipedia.org/wiki/Real_D_3D> (Hay una advertencia de que el texto parece publicitario y sospechoso) Technology RealD 3D cinema technology uses circularly polarized light to produce stereoscopic images. Circular polarization is preferable to linear polarization because viewers are able to tilt their head and look about the theater naturally with no loss of 3D perception whereas linear polarization requires viewers to keep their head within a certain degree of tilt for effective 3D perception; otherwise they may see double or darkened images.[6] The projector alternately projects the right-eye frame and left-eye frame 144 times per second, and circularly polarizes these frames, clockwise for the right eye and counterclockwise for the left eye. A push-pull electro-optical modulator called a ZScreen is placed immediately in front of the projector lens to switch polarization. The audience wears recyclable circularly polarized glasses to make sure each eye sees only "its own" picture, even if the head is tilted. In RealD Cinema, each frame is projected three times to reduce flicker, a system called triple flash. The source video is usually only (2x)24 frames per second (which can result in a subtle ghosting and stuttering on horizontal camera movements). A silver screen is used to keep the light polarized and to reflect back as much light as possible to counter polarization losses. The result is a 3D picture that seems to extend behind and in front of the screen itself.[7] Curioso. Lo cierto es que funcionaba bien. - -- Saludos Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEARECAAYFAktEj4IACgkQtTMYHG2NR9XDSwCgkHMA/+p4cNDb7ktkK9Apb5t7 CEIAnAyLYAaY4ZR6qcgh3laM4hGWmR+P =lZ5N -----END PGP SIGNATURE-----