WO1985003587A1

WO1985003587A1 - Apparatus for reading optically-recorded card

Info

Publication number: WO1985003587A1
Application number: PCT/JP1985/000037
Authority: WO
Inventors: Takuya Wada; Shoei Kobayashi
Original assignee: Sony Corporation
Priority date: 1984-01-31
Filing date: 1985-01-30
Publication date: 1985-08-15
Also published as: JPS60159977A

Abstract

An apparatus for reading optically-recorded cards, which reads through a line sensor (10) the data of sub-tracks Ts recorded optically on a card (1) in which a main track TM, which consists of a plurality of sub-tracks Ts parallel with each other, is formed in the lengthwise direction of the card substrate (1A), and in which each sub-track Ts consists of a plurality of optical dots. Address marks t corresponding to the sub-tracks Ts are formed along the edge of the main track TM of the card (1), and are detected by an optical detector (11). Mark detect signals are then counted by an address counter (12) to detect the position of the sub-track Ts. Relying upon the counted value of the address counter (12), relative motion is controlled in the direction of the main track among the line sensor (10), optical detector (11) and card (1). With this invention, it is possible to selectively read the data recorded in any desired sub-track Ts of the optically-recorded card (1).

Description

Specification

Title of the invention Optical recording card reader

Technical field

The present invention relates to an optical recording force reading device that optically records an information signal.

Background art

There are optical recording cards called memory cards and software cards. First, with reference to FIG. 1, a description will be given of such a conventional force guide. (1) shows the optical recording card as a whole. This card (1) is formed by forming a linear belt-shaped main track T _{M in} the longitudinal direction of a rectangular force board (U). The main track TM is composed of an array of a plurality of sub-tracks T s parallel to each other. Furthermore, each sub-preparative rack T _S is composed of an array of pit P as a plurality of light histological dot-like recording marks as shown in Figure 2. Each sub-track T _S is arranged so as to be orthogonal to the arrangement direction. In each sub-track T s, a unit signal of a digitized signal of an information signal such as a video signal, an audio signal, and a data signal is recorded depending on the presence or absence of a bit P, a difference in an interval, and the like.

Pit P is is a recess in the light reflection layer formed on the force one de substrate (1A), as the optical dot-shaped recorded marks example TeO _x

Recording traces based on the difference in light reflectance due to the phase transition between the crystal and the amorphous on the layer of (-1) are also possible.

(la) and (lb) are straight lines parallel to the main traffic T _M on both sides of the card substrate (U). One side (la) is a reference side edge. Also, each side face on both sides (la) and (lb) sides of the card board (1A) constitutes a plane orthogonal to the front and back surfaces parallel to each other of the card board (1A).

Next, the information recorded on the track from such cards A conventional optical recording card reading device for reading signals will be described with reference to FIGS. 3 and 4. FIG. The card (1) inserted into the reading device is transferred by the card feed roller (2) to the quotient of the arrow (3) along the reference side 緣 (la) of the card (1), and the LED, etc. The light beam (5) from the light source (4) is a condenser lens

The track TM of the card (1) is irradiated through (6), and the reflected light from the track TH, that is, the reading light (Ί) of the track TM, passes through the objective lens (8). The light is projected onto the photodetector (10) held by the holding plate (9), so that the information signal can be read. The photodetector (10) is a line sensor consisting of a CCD (charge-coupled device), in which a plurality of photodetectors (10a) are arranged in a straight line, and the image is transferred to this by electrical scanning. The direction of the image of the sub-track T _{S on} the photodetector (10) coincides with the arrangement direction of the photo-detecting elements (10a), and one sub-track T _s image of pit of Te to base is imaged simultaneously on the light detector (10), one sub-trough click T _S content of the information signal is to be once to read the.

Furthermore, the photodetector (10) transfers charges accumulated in the plurality of photodetector elements (10a) for a predetermined period of time via a gate which is simultaneously turned on by a shift pulse. The transfer is shifted to each transfer element, and the charges in the transfer section are serially transferred by a transfer clock and output to an output terminal.

Incidentally, in the conventional optical recording force one de reader described above, the random access, i.e. the optical recording power over de, multiple sub tracks T _s sac Chi constituting the main bets rack TM, Any secondary track Ts, counting from the initial secondary track T _s, is an arbitrary M book N

(N> M) The recorded information of the second sub-track Ts cannot be selected and read.

In view of such a point, the present invention provides an arrangement of a plurality of sub-tracks parallel to each other. The main track consisting of rows is formed in the longitudinal direction of the card substrate, and each sub track is composed of an array of a plurality of optical dot recording bases. Optical light that sequentially reads the reading light from each sub track of the main track of the recording power to the line sensor, and outputs the recording information of the optical recording card as an electric signal from the line sensor. We propose an optical recording card reader that can select and read any desired sub-track recording information on an optical recording card. It is to be.

Disclosure of the invention

In order to achieve this object, the present invention provides a main track composed of an array of a plurality of sub-tracks parallel to each other, which is formed in the longitudinal direction of the card substrate, and a plurality of sub-tracks are provided. The reading light from each sub-track of the main track of the optical recording force consisting of an array of optical dot-shaped recording traces is sequentially projected onto the line sensor, In an optical recording force reading device that outputs the recording information of the optical recording force as an electric signal, in the vicinity of the side of the main track of the optical recording force Each sub-track is provided with an address mark corresponding to each of the sub-tracks, and a photodetector for detecting light read from this address mark and an address count for counting a mark detection signal from the photodetector are provided. And the address counter The relative movement position in the main track direction between the optical sensor and the optical sensor is controlled based on the counted value of the light. is there.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a plan view showing a conventional optical recording card, Fig. 2 is a pattern diagram showing the configuration of a sub-track, and Figs. 3 and 4 | Fig. 5, Fig. 6 FIG. 7 and FIG. 7 are a plain view showing a part of the optical recording force according to an embodiment of the present invention, a perspective view showing a mechanism of the reading device, and a block diagram showing a fel path of the reading device. FIG. 8 is a block diagram showing a part of a circuit according to another embodiment of the present invention, and FIG. 9 is a waveform diagram for explaining the circuit diagram. FIG. 10, FIG. 11, FIG. 11, FIG. I is a plan view showing a part of an optical recording card according to still another embodiment of the present invention, a pattern III showing an absolute address mark, a plan view showing a line sensor and both photodetectors, and a reading device. FIG. 3 is a block diagram showing an image path.

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described below with reference to FIGS. 5 to 7. In these drawings, the same reference numerals are used for parts corresponding to FIGS. 1 to 4 described above. And duplicate explanations are omitted.

Fig. 5 shows an optical recording card (1) for use in the apparatus of this embodiment, in the upper card substrate (1A), also one side緣(both sides緣main tracks T _Eta Yes ) in, each of the sub-door rack T _s of the end portion (the middle also of县方form corresponding to the one-to-one ^ in the sub-track T _s in possible) § dress mark t has been kicked set. The address mark t has a different reflectance (transmissivity is possible), unevenness or color different from the ground of the card (I).

FIG. 6 shows the main mechanism of the apparatus of the present embodiment. Most of the structure is the same as that of the conventional example shown in FIGS. 3 and 4, except for the holding plate.

The point that the line sensor (10) of (9) is provided with a photodetector (11) such as a phototransistor for detecting the above-mentioned address mark t is provided at an end.

-The address mark t is illuminated together with the sub-track T s by a light source (not shown) such as an LED as shown in FIG. 3, and the reflected light from the address mark t is The light is reflected by the objective lens (8) together with the reflected light from the optical pickup T s, and is incident on the photodetector (11). FIG. 5 shows a main circuit of the device of this embodiment, which will be described below. The force (1) moves in the direction of arrow 3) in FIG. 6, and the photodetector (11) sequentially moves from the address mark t corresponding to the leftmost (starting) sub-track T _S. When the dress mark t is detected, a mark detection signal (waveform shaped as necessary) is output from the photodetector (11), and the mark detection signal is supplied to an address counter (12). This counter (12) is an up-counter, which is detected by detecting means (not shown) for detecting the rotation direction of the card feeding roller (2) or the motor (17) for rotating the card feeding roller (2). The output switches between up and down. The detection signal (count value) of the position X of the sub-track T _S obtained from the counter (12) is supplied to the digital comparator (14). (13) in register, to which the sub preparative rack position of T _s, i.e. the left end of the sub-tracks T _S numbers from the sub-preparative rack T _s to be specified, namely M or Preset numerical values from M to N (N> M).

The detection signal of the counter (12) passes through a comparator (14) and is supplied to a driver (15), and the output of the dryno (15) is passed through a gain-off switch (16). It is supplied to the motor (17) that drives the roller (2).

When the comparator (14) detects that the position X of the sub-track T _s from the counter (12) matches the prescribed position M of the sub-track T _S , a match signal is output. Is output.

尙, Load the contents of the register (13) into the counter (12), subtract it, and output a match signal when the contents (count value) of the counter (12) becomes zero. By doing so, the comparator (14) can be omitted.

If the designated number of the sub-track T s is only M, when X-M is reached, the switch (16) is turned off to stop the motor (Π) rolling. In other words, stop the transfer of the card (1) and instruct the licenser (10) to start reading.

If the sub-track T s has an action number of M to N, it issues a command to start reading to the line sensor (10) when X = M, and then to the line sensor (10) when it becomes XN. At the same time, it issues a read end command, turns off the switch (16), and stops the motor (17). Note that during X = M to N, the detection signal from the photodetector (11) can be supplied to the licenser (CCD) as a shift pulse.

In the circuit of Fig. 7, if a part (one) of the mark detection signal from the photodetector (11) is missing (dropout), the information of the specified sub-track T s is read. Can not be done. In order to solve this problem, a drop compensation H path as shown in FIG. 8 may be inserted between the photodetector (11) and the counter (12).

By the way, if the traveling speed of the card (1) is constant, the photodetector (11) outputs a constant detection signal (pulse) having a constant frequency and duty as shown in FIG. 9A. Is done. Note that the portion indicated by the dashed line in 9A A indicates the missing part of the detection pulse.

In the embodiment shown in Fig. 8, however, the detected if signal from the photodetector (il) is supplied to the drop-out supplementary and compensated IS path monostable multivibrator (18) and the trigger is applied. As shown in Fig. 9B, a pulse rises (or falls) after the detection pulse and falls near the middle of the next detection pulse (the rising edge). This is supplied to the monostable multivibrator (19), and the monostable multivibrator (19) is controlled by the detection signal from the photodetector (11). Output a pulse with a narrow pulse width as shown in Fig. C. The detection signal from the photodetector (11) and the monostable multivibrator The pulse from (19) is supplied to the OR circuit (20), and the OR circuit (20) is supplied to the OR circuit (20).

The output of (20) is supplied to the counter (12) to compensate for the dropout of the mark detection signal.

FIGS. 10 to 10 show another embodiment in which a countermeasure for a case where the mark detection signal from the photodetector (11) is partially dropped (one or more than one) is dropped. Although the description will be made with reference to FIG. 13, in these figures, the parts corresponding to those in FIG. 1 to FIG.

FIG. 10 shows an optical recording card (1) for use in the apparatus of this embodiment, in the upper card substrate (U), is also one side edge (both sides緣main bets rack T _H Yes), and a rectangular address mark (relative address mark) corresponding to each sub-track T _S one-to-one on a part of each sub-track T _S (and also in the middle). Along with t, an absolute address mark t 'is provided. This address mark t 'has a reflectance (transmissivity is also possible), unevenness or color different from the ground of the card (1), and a plurality of dot-shaped recording traces as shown in FIG. It consists of an array of P '.

FIG. 12 shows a main part mechanism of the apparatus of the present embodiment. Most of the structure is the same as that of the embodiment of FIG. 6, but the difference is that, as shown in FIG. At the end of the line sensor (10), in addition to the photodetector (11) such as a phototransistor that detects the above-mentioned address mark t, the above-mentioned absolute address mark t 'is detected. The point is that a photodetector (line sensor) (CCD) (1) is provided.

The address mark t, t ', together with the sub-preparative rack T _s, is irradiated by connexion light in Fig. 3 and similar such as an LED light source (5), address mark t, t' reflected light from is being brought focused by an objective lens (8) with reflection of the auxiliary preparative rack T _s, an optical detector (11), is caused to enter the (1 gamma). FIG. 13 shows a main circuit of the apparatus of the present embodiment, in which parts corresponding to those in FIG. 7 described above are denoted by the same reference numerals, and redundant description is omitted. In the case where the position of the sub-track T s is set to M or M to N by the register (13), if a coincidence signal of X = M is obtained from the converter (14), in either case, the switch is used. Turn off the switch (16) and stop the rotation of the motor (17), that is, stop the movement of the card (1). Then, the corresponding absolute address mark t 'of the sub-track T _{S at} the stopped position is read by the photodetector (licenser) (1), and this is set in the register (21). The absolute address is loaded into the counter (12) and the register is loaded.

The flag signal is output from (21) and supplied to the read start command signal input terminal of the line sensor (10) via the HI path (22) together with the match signal from the comparator (14). The absolute address loaded into the counter (12) is compared with the address of the register (13) by the comparator (14). If there is no coincidence due to the lack of the detection pulse of the detection signal of the photodetector (11), the switch (1_6) is turned on, the motor (17) is rotated, and the address thereof is turned on. The card (1) is moved by the difference of.

If the sub-track T s has only M, the switch (16) is turned off and the rotation of the motor (17) is stopped when X = M again, that is, the card (1) And stop the transfer of the vehicle, and instruct the line sensor (10) to start reading by the output of the AND I “mouth” road (22).

When the sub-tracks T _s for a specified number M to N, with ¾i rolling causes the motor (17) and sweep rate pitch (16) is turned on when the One Do again X = M, Ann de circuit (22 ) Output to the line sensor (10) to start firing, and when XN is reached, instructs the line sensor (10) to end reading and switches (16) Turn off the motor and stop the rotation of the motor (17).

In the embodiment of FIGS. 10 to 13, even if one or more consecutive missing pulses occur in the detection signal from the photodetector (11), the determined sub-track T _s Can access the information accurately and read that information.

Note that if the absolute address mark t 'is read, no address error occurs, but a line sensor (CCD) is required as the photodetector (11') for reading the absolute address mark t '. However, it is difficult to achieve high-speed access by moving the card (1) at high speed because of the storage time. Therefore, usually, a fast-response photodetector (11) such as a phototransistor is used. By using this to detect the relative address mark t and counting it with a counter (12) to detect the absolute address, high-speed access is made useless. The absolute address error detected by the counter (12) is compensated by the final reading of the absolute address mark t 'by the photodetector (11').

1 toni can be.

Incidentally, fixing the card (1), line sensors (10) and the photodetector to the main preparative rack T _M direction (11) may be moved to ([pi ').

According to the present invention described above, a main track including an array of a plurality of sub-tracks parallel to each other is formed in the longitudinal direction of the card substrate, and each sub-track is The reading light from each sub-track of the main track of the optical recording card composed of an array of a plurality of optical dot-shaped recording traces is sequentially projected to the licenser, An optical recording card reader that outputs the recorded information of the optical recording card as an electric signal from the licenser. In the reader of the optical recording card, any desired sub-track of the optical recording card can be used. Thus, it is possible to obtain an optical recording card reader capable of selecting and reading the record information of the optical disc.

Claims

o 5 10 Range of praise

1. A main track composed of an array of a plurality of sub-tracks parallel to each other is formed in the lateral direction of the force, and each of the sub-tracks has a plurality of optical dot-shaped recording traces. The reading light from each of the sub-tracks of the above-mentioned main track of the optical recording card composed of an array of In an optical recording card reader for outputting recorded information as an electric signal, each of the sub-tracks is located near the side of the main track of the optical recording card. A corresponding address mark is provided, a photodetector for detecting reading light from the address mark, and an address counter for counting a mark detection signal from the photodetector are provided, and a total from the address counter is provided. On the basis of the numerical value Reading the optical recording force, wherein the relative movement position in the main track direction between the line sensor and the light detector and the optical recording force is controlled. Taking device.

2. The address counter is composed of an up-down counter, and the line sensor 0 and the photo-detector are obtained by comparing the count value from the up-down counter with a value preset in a register. The optical recording force guide according to claim 1, wherein a relative movement position in a direction of the main track between the optical recording force guide and the optical recording force guide is controlled. Reading

3. The apparatus according to claim 1, wherein said address counter comprises a countable down counter.

4. The claim 1 wherein a drop compensation circuit is inserted between the photodetector and the address counter. 5/03587 Optical recording card reader described in ^J

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