Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
An apparatus for reproducing information from a card-like optical information recording medium (1) including tracks (2a, 2b, 2c, ...) for guiding and tracks (3a, 3b, 3c, ...) for information, characterized in that said optical information reproducing apparatus comprises: light-spot forming means (6, 7, 8, 9, 10) for forming at least three light spots (4, 5a, 5b) on a card-like recording medium including tracks for guiding and tracks for information; signal detection means (9, 10, 11, 12, 13) for detecting focusing control signals (V FO ) and tracking control signals (V TR ) by scanning said tracks for guiding with a spot (4) among said light spots; signal reproducing means (6, 7, 8, 9, 10, 13) for reproducing information signals (V E , V F ) of plural tracks by scanning the information tracks with the remaining at least two light spots (5a, 5b); plural storage means (22, 23) for storing reproduced information signals of the plural tracks separately for each track; and read-out means for sequentially and successively reading the stored information from each of the plural storage means by the time sharing system with a speed larger than that when said reproduced information has been input.
Claim 2
Independent Claim
197 words
An apparatus for reproducing information from a card-like optical information recording medium (1) including tracks (2a, 2b, 2c, ...) for guiding and tracks (3a, 3b, 3c, ...) for information, characterized in that said optical information reproducing apparatus comprises: light-spot forming means (6, 7, 8, 9, 10) for forming at least three light spots (4, 5a, 5b) on a card-like recording medium including tracks for guiding and tracks for information; signal detection means (9, 10, 11, 12, 13) for detecting focusing control signals (V FO ) and tracking control signals (V TR ) by scanning said tracks for guiding with a spot (4) among said light spots; signal reproducing means (6, 7, 8, 9, 10, 13) for reproducing information signals (V E , V F ) of plural tracks by scanning the information tracks with the remaining at least two light spots (5a, 5b); plural storage means (22, 23) for storing reproduced information signals of the plural tracks separately for each track; and read-out means for sequentially and successively reading the stored information from each of the plural storage means by the time sharing system with a speed larger than that when said reproduced information has been input.
Claim 3
Dependent Claim
21 words
An optical information reproducing apparatus according to claim 1, wherein the number of said light spots (4, 5a, 5b) is three.
Claim 4
Dependent Claim
23 words
An optical information reproducing apparatus according to claim 1, wherein the number of said light spots (4, 5a, 5b, 5c, 5d) is five.
Claim 5
Dependent Claim
60 words
An optical information reproducing apparatus according to claim 1, wherein said optical signal detection means (9, 10, 11, 12, 13) is configured such that an element (13A, 13B, 13C, 13D) disposed at the center scans said tracks for guiding, and other elements (13E, 13F) disposed at both sides of said element disposed at the center scan said tracks for information.
Claim 6
Dependent Claim
79 words
An information reproducing apparatus according to claim 4, wherein said optical signal detection means is configured such that a combination element (13A, 13B, 13C, 13D) consisting of four square elements closely arranged in two rows and two columns is disposed at the center, and focus error signals (V FO ) are formed by signals from two pairs (V A , V B , V C , V D ) of elements in the diagonal direction in the combination element.
Claim 7
Dependent Claim
52 words
An information reproducing apparatus according to claim 5, wherein said optical signal detection means is configured such that tracking error signals (V TR ) are formed by signals from two pairs of elements, each pair (V A , V D ; V B , V C ) being on the identical side.