US4094013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical storage disk system with disk track guide sectors
Assignee: US Philips Corp
•
Filing: 1976-05-13
•
Granted: 1978-06-06
•
Expires: 1996-05-13
Abstract
Abstract A storage disk comprising at least one data track which is composed of spiral-shaped turns or concentrical turns, the data being arranged in the form of data blocks on the turns so that between the data blocks alternately a guide segment or a blank segment is present. The lengths of the unit, measured in angular degrees, consisting of data block and guide segment and the unit consisting of data block and blank segment are substantially the same and are chosen so that the same number of units is accommodated in each turn. The spirals are sub-divided into sectors which contain only data blocks or only guide segments or blank segments. In each sector containing guide segments the radial distance between these segments is substantially twice the distance between the data blocks in each sector containing data blocks. The invention also relates to a device for writing and/or reading data of a rotating disk as described, comprising a light deflection system which notably includes a slow light deflector and a fast light deflector, the latter deflector scanning the guide segments.
Inventors
- 👤 Bernhard Hill
- 👤 Rudiger Pepperl
- 👤 Johann Kruger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:29
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24085; G11B17/00; G11B17/005; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B7/08; G11B7/09; G11B7/0938; G11B7/12; G11B7/14; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/215; G11B2220/218; G11B2220/25; G11B2220/2525
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
157 words
A storage disk for storing data in spiral or concentric tracks, comprising a disk-shaped storage medium having a recording surface divided into a plurality of equiangular guide sectors; each two of said data storage sectors being separated by a guide sector; said tracks thereby passing successively through data storage sectors and guide sectors; a data block of information being stored in substantially all of the track portions in each of said data storage sectors; guide segments being stored along the track in the guide sectors only adjacent alternate data blocks; the number of data storage sectors being odd to maintain the radial distance between edges of the guide segments substantially euqal to twice the radial distance between data blocks; blank segments being provided along the tracks in the guide sectors and adjacent further alternate data blocks, the tracks thereby containing repetitive successions of a data block, a guide segment, an additional data block and a blank segment.
Claim 2
Dependent Claim
157 words
A storage disk for storing data in spiral or concentric tracks, comprising a disk-shaped storage medium having a recording surface divided into a plurality of equiangular guide sectors; each two of said data storage sectors being separated by a guide sector; said tracks thereby passing successively through data storage sectors and guide sectors; a data block of information being stored in substantially all of the track portions in each of said data storage sectors; guide segments being stored along the track in the guide sectors only adjacent alternate data blocks; the number of data storage sectors being odd to maintain the radial distance between edges of the guide segments substantially euqal to twice the radial distance between data blocks; blank segments being provided along the tracks in the guide sectors and adjacent further alternate data blocks, the tracks thereby containing repetitive successions of a data block, a guide segment, an additional data block and a blank segment.
Claim 3
Dependent Claim
17 words
A storage disk as claimed in claim 1, wherein a first turn consists only of guide segments.
Claim 4
Dependent Claim
23 words
A storage disk as claimed in claim 1 wherein the width of the guide segments is larger than that of the data block.
Claim 5
Dependent Claim
23 words
A storage disk as claimed in claim 1, wherein guide segments are provided with a code which contains the number of a turn.
Claim 6
Dependent Claim
35 words
A storage disk as claimed in claim 1, wherein the guide segments are provided with a code which indicates whether the number of a turn of the spiral or concentric turn is even or odd.
Claim 7
Dependent Claim
27 words
A storage disk as claimed in claim 1, wherein the guide segments are provided with a code which contains a sequence number of an adjacent data block.
Claim 8
Dependent Claim
29 words
A storage disk as claimed in claim 1, provided with a thin storage layer of synthetic material or metal in which holes can be burned corresponding to the data.
Claim 9
Dependent Claim
14 words
A storage disk as claimed in claim 1, provided with a magneto-optical storage layer.
Claim 10
Dependent Claim
35 words
A storage disk as claimed in claim 1, in which the data track is a spiral, wherein the number of units, i.e. the number of data storage sectors is odd per turn of the spiral.
Claim 11
Dependent Claim
24 words
A device as claimed in claim 1, further comprising a stationary optical detector which receives light from the stroage disk for reading the data.
Claim 12
Independent Claim
286 words
A device for reading and/or writing on a rotating storage disk wherein data is stored in spiral or concentric tracks on a disk-shaped storage medium having a recording surface divided into a plurality of equiangular data storage sectors and an equal number of equiangular guide sectors; each two of the data storage sectors being separated by a guide sector; the tracks thereby passing successively through data storage sectors and guide sectors; a data block of information stored in substantially all of the track portions in each of the data storage sectors; guide segments being stored along the tracks in the guide sectors only adjacent alternate data blocks; a number of data storage sectors being odd to maintain the radial distance between edges of the guide segments substantially equal to twice the radial distance between data blocks; blank segments being provided along the tracks in the guide sectors and adjacent further alternate data blocks, the tracks thereby containing repetitive successions of a data block, a guide segment, an additional data block and a blank segment; the writing and/or reading device comprising an objective mounted in a fixed radial position with respect to the storage disk; a light source means for providing a light beam; means for focussing the light beam through the objective onto said tracks, and a light deflection system means for periodically radially deflecting said light beam from a data block track to a guide segment of a preceeding track and for deflecting said light beam from said guide segment back to said data block track and for controlling the light beam to follow said data block track in response to positional differences between said light beam and said guide segment of said preceeding track.
Claim 13
Independent Claim
286 words
A device for reading and/or writing on a rotating storage disk wherein data is stored in spiral or concentric tracks on a disk-shaped storage medium having a recording surface divided into a plurality of equiangular data storage sectors and an equal number of equiangular guide sectors; each two of the data storage sectors being separated by a guide sector; the tracks thereby passing successively through data storage sectors and guide sectors; a data block of information stored in substantially all of the track portions in each of the data storage sectors; guide segments being stored along the tracks in the guide sectors only adjacent alternate data blocks; a number of data storage sectors being odd to maintain the radial distance between edges of the guide segments substantially equal to twice the radial distance between data blocks; blank segments being provided along the tracks in the guide sectors and adjacent further alternate data blocks, the tracks thereby containing repetitive successions of a data block, a guide segment, an additional data block and a blank segment; the writing and/or reading device comprising an objective mounted in a fixed radial position with respect to the storage disk; a light source means for providing a light beam; means for focussing the light beam through the objective onto said tracks, and a light deflection system means for periodically radially deflecting said light beam from a data block track to a guide segment of a preceeding track and for deflecting said light beam from said guide segment back to said data block track and for controlling the light beam to follow said data block track in response to positional differences between said light beam and said guide segment of said preceeding track.
Claim 14
Dependent Claim
63 words
A device as claimed in claim 1, wherein a synchronism with the disk rotation the light beam is be guided in the radial direction, transverse to the turns, given guide segments being detectable in one turn, thus any desired turn being accessible and hence each data block in the addressed turn being activatable by counting down or further addressing of the data blocks.
Claim 15
Dependent Claim
75 words
A device as claimed in claim 11, wherein the disk comprises a number of spiral-shaped tracks which are situated in radial regions of the disk and which represent a corresponding number of channels, a plurality of channels forming part of a channel group for which the light source, the intensity modulator and the fast light deflector are used in common, the activation of the channels of a channel group being effected by a multiplex unit.
Claim 16
Dependent Claim
59 words
A device as claimed in claim 13, wherein the multiplex unit consists of a series of polarization switches and polarization-sensitive beam-splitting prisms a polarization switch and a polarization-sensitive beam splitting cube being required for the activation of each channel of a channel group, with the exception of the last channel, a deflection prism being required for the last channel.
Claim 17
Dependent Claim
19 words
A device as claimed in claim 14, wherein the polarization switches of the multiplex unit are electro-optical polarization switches.
Claim 18
Dependent Claim
19 words
A device as claimed in claim 14, wherein the polarization switches of the multiplex unit are magneto-optical polarization switches.
Claim 19
Dependent Claim
25 words
A device as claimed in claim 11, wherein the light deflection system consists of a slow analog-controlled light deflector and a fast digital-controlled light deflector.
Claim 20
Dependent Claim
77 words
A device as claimed in claim 17, wherein for the slow light deflector use is made of a piezoelectrically or electrodynamically controlled mirror whose deflection direction is measured in that the light beam jumps, under the control of the fast light deflector, onto guide segments of the preceding turn, this scanning operation producing photoelectrical signals by means of which the mirror can be readjusted, if necessary, thus a substantially constant distance from the preceding turn being maintained.
Claim 21
Dependent Claim
45 words
A device as claimed in claim 17, wherein the digital light deflector scans the guide track by means of at least two semi-overlapping light spots and, in the case of a write operation, switches the light beam in dependence of the data to be written.
Claim 22
Dependent Claim
16 words
A device as claimed in claim 17, wherein the fast light deflector scans the guide segments.
Claim 23
Dependent Claim
54 words
A device as claimed in claim 20, further comprising means for correcting radial motions of the storage disk due to external causes, by readjustment of the slow light deflector, the signals required for this purpose being derived from the disk by the scanning of the guide segments by means of the fast light deflector.
References Cited (Backward Citations)
US3408656A
Cited
US3573471A
Cited
US3971002A
Cited
US3962688A
Cited
US3919697A
Cited
US3994016A
Cited
US3996570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |