G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.3
G11B 11/08 (2006.01) G11B 7/0045 (2006.01) G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 7/09 (2006.01) G11B 7/125 (2006.01) G11B 11/05 (2006.01) G11B 21/10 (2006.01) G11B 23/00 (2006.01) G11B 23/36 (2006.01)
Patent
CA 1106061
INFORMATION SIGNAL RECORDING MEDIUM OF ROTARY TYPE AND APPARATUS FOR RECORDING INFORMATION SIGNAL THEREON ABSTRACT OF THE DISCLOSURE: An information signal recording medium of rotary type has a flat surface with first successions of pits formed therein as respective concavities in response to a first signal and with second successions of pits formed therein as respective concavities in response to a second signal. The second successions of pits are formed at positions substantially intermediate between the centerlines of adjacent tracks formed by the first successions of pits. Each pit of the first successions of pits and each pit of the second successions of pits respectively have widths W1 and W2 and depths D1 and D2, wherein the relationships between the widths and said depths are so selected that the levels L1 and L2 of the first and second signals which are reproduced when the first and second successions of pits are traced and thereby reproduced by reproducing means will be such that the level L1 is greater than the level L2, and the difference between the levels L1 and L2 will be greater than a specific level difference. - 2 -
296450
Kinjo Hisao
Ueno Ichiro
Wada Yoshiyo
Marks & Clerk
Victor Company Of Japan Ltd.
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