Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1989-05-18
1991-09-03
Reinhart, Mark J.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
369 4424, C01D 942
Patent
active
050458680
ABSTRACT:
Disclosed are an information signal recording medium having pits which are formed in a geometric concave or convex configuration for recording information signals and on which a light spot is applied for reproduction of the information signals, a recording apparatus for optically recording the information signals thereon and a reproducing apparatus for optically reproducing the information signals therefrom. In the information signal recording medium, a pit width of a first pit having a pit length substantially equal to half the longest recording wavelength is set to a first pit width smaller than the diameter of the light spot, a pit width of a second pit having a pit length substantially equal of half the shortest recording wavelength is set to a second pit width greater in dimension than the first pit width, and a pit width of a third pit having a pit length in-between the pit length substantially equal to half the longest recording wavelength and the pit length substantially equal to half the shortest recording wavelength is set to be equal to a pit width of a fourth pit having a pit length shorter than the pit length of the third pit or set to be smaller than the pit width of the fourth pit.
REFERENCES:
patent: 3841733 (1974-10-01), Ebersole
patent: 4118734 (1978-10-01), Bouwhuis et al.
patent: 4327430 (1982-04-01), Wade
patent: 4449215 (1984-05-01), Renio
Applied Optics, vol. 17, No. 13, Jul. 1, 1978, pp. 1993-2000, Eindhoven, NL; G. Bouwhuis et al.: "Video Disk Player Optics".
"Optical Techniques Developed for the RCA Video Disc" by I. Gorog; RCA Review vol. 39, No. 1, Mar. 1978, pp. 162-185.
"Optical Readout of the RCA Video Disc" by A. H. Firester et al. RCA Review vol. 39, No. 3, 1978, pp. 392-426.
Reinhart Mark J.
Victor Company of Japan Ltd.
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