Record carrier with improved modulation and asymmetry
Номер патента: EP1756809A1
Опубликовано: 28-02-2007
Автор(ы): Erwin R. Meinders, Jacobus H. M. Neijzen
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV
Опубликовано: 28-02-2007
Автор(ы): Erwin R. Meinders, Jacobus H. M. Neijzen
Принадлежит: KONINKLIJKE PHILIPS ELECTRONICS NV
Реферат: The invention relates to a record carrier comprising a train of marks and lands ( 14, 15, 23 ), which has a plurality of marks comprising shortest marks ( 1 ) and other marks ( 2 ) and a plurality of lands between said marks in a direction of said train of marks and lands comprising shortest lands ( 28 ) and other lands ( 27 ), said train of marks and lands ( 14, 15, 23 ) having information read by applying a light beam, and a land area not being part of said train of marks and lands. To provide a record carrier with an improved modulation of all marks without sacrificing tangential density and to further provide a record carrier with a reduced or substantially no asymmetry, it is proposed that said shortest marks ( 1 ) and leading and trailing edges ( 3 ) of said other marks ( 2 ) have a width larger than that of a central mark section ( 4 ) between said leading and trailing edges ( 3 ) of said other marks ( 2 ) and that said lands between said marks ( 19 ) in said direction of said train of marks and lands ( 15 ) have a reflectivity lower than that of said land area. The invention further relates to a method and a device for manufacturing such a record carrier.
Record carrier with improve modulation and asymmetry
Номер патента: US20070217320A1. Автор: Erwin Meinders,Jacobus Neijzen. Владелец: KONINKLIJKE PHILIPS ELECTRONICS NV. Дата публикации: 2007-09-20.