JPH0256732A - Recording/playback device and record carrier cassette for the device - Google Patents

Abstract

PURPOSE:To attain the optical recording to a tape-shaped carrier by separating a light receiving element from an actuator. CONSTITUTION:The light from a light source means 5 of a laser diode is reflected through a light separating means 3 with a beam splitter in a hollow shaft 2 of a rotating cylinder 1 and a light converging means 4 of the objective lens mode of a microscope near the outer circumference of the cylinder with a tape-shaped record carrier 8 and again, through means 4 and 3 enters a light receiving means 6. The output of the means 6 is divided through a pre-treatment processing means 11 into an information signal (a) and a control error signal (b), the signal (b) enters a light source control means 12, adjusts the phase compensation, control gain and the like, an actuator is controlled and the position of the means 5 is moved. A light receiving element 6 for detecting a control signal is held in the cylinder 1, separated from the actuator controlled, and therefore, tracking is easy to be obtained, the centrifugal force does not function for the actuator and the electric power of the circuit in the cylinder is also smaller. The carrier 8 is not brought into contact with the cylinder 1 of the high speed rotation directly and the non-contacting recording and reproducing can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording/reproducing device and a record carrier cassette used therein.

BACKGROUND OF THE INVENTION In recent years, recording and reproducing technology has made remarkable progress. However, optical recording using a tape-shaped record carrier has not been put to practical use.

The concept of a recording/reproducing apparatus using a tape-shaped record carrier is described in Japanese Patent Application Laid-Open No. 57-64333. This is simply the use of an optically recordable tape-like record carrier instead of the magnetic tape of a video tape recorder (VTR).

Problems to be Solved by the Invention However, a recording/reproducing apparatus using a tape-shaped record carrier cannot be realized simply by replacing the tape of a VTR with an optically recordable one.

The recording and reproducing apparatus disclosed in Japanese Patent Application Laid-Open No. 57-64333 incorporates an optical pinocassive device in the cylinder. The pink amplifier includes a focusing device and a trunking device such as those used in optical disk devices. However, it is difficult to supply power to the rotating cylinder, and even if it were possible, the noise would be large. Our studies have revealed that if a light-receiving element is provided outside the cylinder to avoid this, the image of the track will rotate on the light-receiving element, making it extremely difficult to obtain a tracking signal.

Also, unlike optical discs, the tracks are not continuous, making tracking extremely difficult.

In view of the above-mentioned problems, the present invention provides an optimal recording and reproducing device for recording on a tape-shaped optical record carrier, a record carrier guide device, and a control device.

Means for Solving the Problems In order to achieve the above object, the recording and reproducing apparatus of the present invention includes a light separating means provided on the rotation axis of a rotating cylinder, and a light converging means provided near the outer periphery of the rotating cylinder. and a light source means provided outside the rotating cylinder, and the light emitted from the light source means passes through the light separation means and the light convergence means, hits the record carrier, and receives the light that has passed through the light convergence means and the light separation means again. a light receiving means provided in the rotating cylinder, an information signal reproducing means for reproducing an information signal from an output signal of the light receiving means, and a light source control means for controlling the light source means based on the output signal of the light receiving means. The present invention has a configuration including the following.

Further, the recording/reproducing apparatus of the present invention includes a light separating means provided on the rotation axis of the rotating cylinder, a light converging means provided near the outer periphery of the rotating cylinder, and a light source provided outside the rotating cylinder. and a light converging means in which the light emitted from the light source passes through the light separating means and the light converging means and hits the recording carrier again.

a first light receiving means provided within the rotary cylinder that receives the light passing through the light separating means; a second light receiving means provided outside the rotary cylinder; and the first light receiving means. The light source control means controls the light source means based on the output signal of the second light receiving means, and the information signal reproducing means regenerates the information signal from the output signal of the second light receiving means.

Further, the recording/reproducing apparatus of the present invention has a configuration including two reels in which a record carrier is wound and housed, and a roller that presses the tape spanning between the reels from the side opposite to the recording surface at the recording/reproducing location. It is something.

Further, the recording/reproducing apparatus of the present invention is provided with a rotary cylinder having a recording/reproducing head, and a light-transmitting roller that is coaxial with the cylinder and is provided so as to surround the outer periphery of the cylinder and around which a recording carrier is wound. It is equipped with the following.

Further, the recording/reproducing apparatus of the present invention includes two reels in which a recording carrier is wound and housed, and a hollow light-transmitting cylinder in which a rotating cylinder having a recording/reproducing head is inserted, and a tape is wound between the reels. It has a structure that integrates a sex roller.

Furthermore, the cassette tape of the present invention is provided with a structure comprising two reels in which a record carrier is wound and housed, and a roller that presses the tape spanning between the reels from the side opposite to the recording surface at the recording/playback location. It is.

The cassette tape of the present invention also includes two reels in which a recording carrier is wound and housed, and a hollow light-transmitting cylinder in which a rotating cylinder having a recording and reproducing head is inserted, and the tape is wound between the reels. It has a structure that integrates the rollers.

The recording and reproducing device of the present invention also includes a signal recording and reproducing means for recording and reproducing a signal on a record carrier, a signal detecting means for detecting a predetermined signal from the output of the signal recording and reproducing means, and an output of the signal detecting means. track position error detection means for detecting an error between a track position to be recorded and reproduced from a certain recording and reproduction position signal; and a control means for predictively controlling a track to be recorded and reproduced based on the output of the track position error detection means. The present invention has a configuration including the following.

The above-mentioned rotating cylinder touches the recording carrier tape diagonally (helical scan) in almost the same way as the rotating cylinder used in a normal VTR, and inside is a part of the recording/playback head used in an optical disk recording/playback machine. is included. As the light separation means, a normal beam splitter or a flat glass plate made oblique to the optical path is used. The objective (focusing) used for the optical disk is used as the light focusing means.
A lens is used. As the light source means, a gas that generates laser light, a diode laser, or the like is used. A light sensing element such as a photodetector is used as the light receiving means. Generally, the information signal reproducing means uses the total amount of light that enters the light receiving means and performs logical operations and reproduces the output according to the recording/reproducing code format. The light source control means includes an actuator that mechanically controls the light source, a control circuit that electrically controls the amount of light, etc., and an actuator control circuit that controls the actuator.

Function: In the recording and reproducing system configured as described above, the rotating cylinder has a control signal detection light receiving element inside the cylinder, and is separated from the actuator that is controlled by the rotating cylinder, making it easy to track and eliminating the need for centrifugal force to act on the actuator. The power of the circuit inside the cylinder is small and it is easy to supply power. Also,
The record carrier tape is prevented from coming into direct contact with the cylinder rotating at high speed, achieving non-contact recording and reproduction, which is a characteristic of optical recording. Furthermore, high-density recording and reproducing is made possible by track position prediction control means that enables narrow track recording and reproducing.

Embodiment Hereinafter, a recording/reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a recording/reproducing apparatus according to the present invention. Figure 1 (A) is a plan view of the mechanical components, Figure 1 (B) is a side view and electrical block diagram of the mechanical components, and Figure 1 (C) is an explanatory diagram that does not show the state of recording on a tape-shaped record carrier. It is.

In FIG. 1, reference numeral 1 denotes a rotating cylinder, which is rotatably held by a hollow shaft 2. As shown in FIG. 3 is a light separating means provided in the hollow shaft 2, which uses a beam splitter and a beam splitter.

4 is a light converging means provided near the outer periphery of the rotating cylinder 1, and is similar to an objective lens of a microscope. Reference numeral 5 denotes a light source means provided outside the rotary cylinder 1, which uses a laser diode. Reference numeral 6 denotes a light receiving means provided near the outer periphery of the rotating cylinder 1 and on the opposite side of the light converging means 4 with respect to the light separating means 3. 7 is a cassette half containing a tape-shaped record carrier 8, and 9 is a roller that presses the record carrier 8 from the direction opposite to the recording surface at the recording/reproducing position, and functions to suppress vibrations of the tape. The rotational direction of the rotary cylinder 1 with respect to the longitudinal direction of the record carrier 8 is VT.
As in the case of R, it forms a predetermined angle (not shown inclined in the figure). That is, as shown in FIG. 1(C), the recording track 10 is oblique with respect to the recording carrier 8.

The tracks may also be perpendicular to the longitudinal direction of the record carrier.

The light emitted from the light source means 5 is transmitted to the light separation means 3. The light passes through the converging means 4, hits the recording body 8, is reflected, and returns to the converging means 4. The light passes through the light separating means 3 and enters the light receiving means 6. The output of the light receiving means 6 enters the preprocessing means 11, where it is divided into an information signal a and control error signals such as focusing and trunking error signals, and is outputted. The control error signal is transmitted to the light source control means 12.
The signal is inputted to adjust phase compensation, control gain, etc., control the actuator, and move the position of the light source means 5.

FIGS. 2 and 3 are diagrams each showing another embodiment of the present invention. Components that are the same as those in FIG. 1 are given the same numbers and their explanations will be omitted. In the case of FIG. 1, the information signal and the error signal were simultaneously extracted by the light receiving means 6. However, when the reflected light from the record carrier 8 is weak, the S/N of the information signal deteriorates.

One of the causes of this is noise emitted from the slip ring terminal that supplies power to the rotating cylinder 1.

In order to eliminate this problem, in the embodiment of FIG. That's what I do. Light receiving means 26
corresponds to the light receiving means 6 in FIG. 1, and the preprocessing means 21 corresponds to the preprocessing means 11. An information signal is obtained from the light receiving element 23.

In FIG. 3, a beam splitter 32 is provided between the light separating means 3 and the light receiving means 36, and the reflected light from the record carrier 8 is reflected as shown by the broken line 31, and the light is placed on an extension of the axis of the rotating cylinder 1. The light is arranged to enter the light receiving element 33. The light receiving means 36 corresponds to the light receiving means 26, and the light receiving element 33 corresponds to the light receiving element 26.

FIG. 4 is a diagram showing another embodiment of the cassette half used in the present invention. In FIG. 4, reels 41, 42 . Rollers 43, 44. A hollow light-transmissive roller 45 is also provided. The roller 44 only needs to be hollow at the portion into which the rotating cylinder 1 is inserted.

The recording carrier 48 includes reels 41 to rollers 43 to rollers 45 to
The rollers 44 to 42 are hung in this order. . As can be seen from the figure, by doing this the record carrier 4
8 and the rotating cylinder 1 are made non-contact, and a large wrapping angle can be obtained.

FIG. 5 shows an embodiment in which the roller 45 of FIG. 4 is coaxial with the rotating cylinder. That is, in FIG. 5, a light-transmitting hollow roller 51 is coaxial with the rotating cylinder 1. As shown in FIG. By doing this, the center accuracy of each lens is improved and the burden on focusing control etc. is reduced.

In the above embodiments, a case has been described in which the normal focusing and trunking control technology used in optical discs is used as the control technology.

However, as the recording density increases, track discontinuity becomes a problem as shown in FIG. 1(C). This improvement method will be explained using the block diagram of FIG. 1(B).

The output signal of the light receiving means 6 enters the pre-processing means 11, which detects the error between the track position to be recorded and reproduced and the recording and reproduction position, and uses the output to predict the track to be recorded and reproduced in the non-track section. A signal is output to the light source control means 12. This can be accomplished by using a microprocessor. In focusing control, if the focusing distance between the last part of recording and playback and the first part of recording and playback is significantly different, calculate the difference between the focusing distance of the last part of recording and playback and the focusing distance of the next first part of recording and playback. The focusing distance is predictively controlled during non-track sections.

In the above embodiment, only one light converging means 4 is provided near the outer periphery of the rotary cylinder, but an optical system using a common light source means 5 can be constructed using a reflecting mirror or a beam splitter.

FIG. 6 shows an embodiment of a rotating cylinder that realizes this idea. In FIG. 6, 65 is a light source means, 63 is a special light separating means for separating the light emitted from the light source means 65 into left and right parts in the figure, and 60 is an optical path having one light separating surface 68 and one total reflection surface 69. The changing means 66 is a light receiving means. 6
0° and 66° are optical path changing means and light receiving means inserted into other optical paths. The light emitted from the light source means 65 passes through the light separation means 63 as shown by the broken line in the figure and reaches the optical path changing means 60.
The light passing through ゛ passes through the light converging means 64, hits a record carrier (not shown) and is reflected, and then returns to the light converging means 64゛ and the optical path changing means 6.
0', passes through the light separation means 63, and further passes through the light path changing means 60.
and enters the light receiving means 66. The same applies to the case of recording and reproducing using the light converging means 64°. Light converging means 64. When either one of the 64° light converging means is used, there is no reflected light of the information signal from the unused side, and there is no mutual interference.

The light source means 65 is used in a time-division manner.

Effects of the Invention The recording/reproducing device configured as described above has a control signal detection light receiving element inside the rotating cylinder, and is separated from the actuator controlled by the light receiving element, so that tracking is easily achieved and centrifugal force is applied to the actuator. does not work, and the power of the circuit inside the cylinder is small, making it easy to supply power. Furthermore, the record carrier tape is prevented from coming into direct contact with the cylinder rotating at high speed, realizing non-contact recording and reproduction, which is a characteristic of optical recording. Furthermore, high-density recording and reproduction is made possible by track position prediction control means that enables narrow track recording and reproduction.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing one embodiment of the recording/reproducing apparatus of the present invention, FIGS. 2, 3, and 6 are schematic configuration diagrams showing other embodiments of the present invention, and FIG. FIG. 5 is a schematic diagram showing an embodiment of the cassette half of the invention. FIG. 5 is a schematic diagram showing an embodiment of the rotating cylinder of the invention. l...Rotating cylinder, 3...Light separating means, 4...Light converging means, 5...Light source means, 6...Light Light receiving means, 8...Record carrier, 9...Roller. Name of agent: Patent attorney Shigetaka Awano Haka 1 person 1 ---
[il city cylinder 1 2-・-ki 7 axis 5-e source 4F slope! −

Claims (1)

[Scope of Claims] (1) A light separating means provided on the rotation axis of the rotating cylinder, a light converging means provided near the outer periphery of the rotating cylinder, and a light source device provided outside the rotating cylinder. and a light receiving means provided in the rotary cylinder for receiving the light emitted from the light source means by passing through the light separating means and the light converging means and onto the recording carrier and passing through the light converging means and the light separating means again. A recording/reproducing apparatus comprising: information signal reproducing means for reproducing an information signal from the output signal of the light receiving means; and light source control means for controlling the light source means based on the output signal of the light receiving means. (2) a light separating means provided on the rotation axis of the rotating cylinder; a light converging means provided near the outer periphery of the rotating cylinder; a light source means provided outside the rotating cylinder; a first light receiving means provided in the rotary cylinder for receiving the light that has passed through the light separating means and the light converging means, hits the recording carrier, and has passed through the light converging means and the light separating means again; a second light receiving means provided outside the cylinder; and a light source control means for controlling the light source means based on the output signal of the first light receiving means;
A recording/reproducing apparatus comprising: information signal reproducing means for reproducing an information signal from the output signal of the second light receiving means. (3) A recording/reproducing device comprising two reels with a record carrier wound therein and a roller that presses the tape spanning between the reels from the side opposite to the recording surface at a recording/reproducing location. (4) A recording/reproducing device comprising: a rotating cylinder having a recording/reproducing head; and a light-transmissive roller coaxial with the cylinder and surrounding the outer periphery of the cylinder, around which a recording carrier is wound. . (5) A record carrier for a recording/reproducing device, comprising two reels in which the record carrier is wound and housed, and a roller that presses the tape straddled between the reels from the side opposite to the recording surface at a recording/reproducing location. cassette. (6) Integrate two reels with a record carrier wound therein and a hollow light-transmissive roller with a tape wound between the reels and into which a rotating cylinder with a recording/reproducing head is inserted. A record carrier cassette for a recording/reproducing device. (7) Signal recording and reproducing means for recording and reproducing signals on a record carrier, signal detecting means for detecting a predetermined signal from the output of the signal recording and reproducing means, and recording from the recording and reproducing position signal that is the output of the signal detecting means. A track position error detection means for detecting an error between a track position to be reproduced and a recording and reproduction position, and a control means for predictively controlling a track to be recorded and reproduced based on the output of the track position error detection means. A recording/playback device for (8) a light separation means provided on the rotation axis of the rotation cylinder; a light source means provided outside the rotation cylinder;
Light emitted from the light converging means and the light source means provided near the outer periphery of the rotary cylinder passes through the light separating means and the light converging means, hits the record carrier, and receives the light that has passed through the light converging means and the light separating means again. A set includes a light receiving means provided in the rotating cylinder, and the plurality of sets, an information signal reproducing means for reproducing an information signal from an output signal of the light receiving means, and the light receiving means. A recording/reproducing apparatus comprising: a light source control means for controlling the light source means based on an output signal.