JPH0845085A - Readout device of information reproducing device - Google Patents

Abstract

PURPOSE:To make the movement for reading the information recording not to be confined in one direction and also to shorten the processing time required for reproducing the information by providing a detection means consisting of an oscillating mirror and a line sensor. CONSTITUTION:The light emitted from a light source 1 is reflected by a half mirror 3 by nearly 90 deg. through an illumination optical system 2. The light reflected at this time is again reflected on the oscillating mirror 5 which is made freely turnable by a driving part 4, and an information recording medium 7 is thereby irradiated through a reading optical system 6. The surface of the information recording medium 7 is irradiated so that the vertical direction of the scanning direction is made to be the longitudinal direction, and the irradiated area is scanned in the rotating direction by the rotation of the oscillating mirror 5. The light beam reflected from the irradiated information recording medium 7 is reflected by the oscillating mirror 5 through the reading optical system 6, and the image is formed on the line sensor 8 through the half mirror 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reader of an information reproducing apparatus for reproducing multimedia information including audio information, image information, digital code data, etc. which are recorded so as to be optically readable.

[0002]

2. Description of the Related Art Conventionally, there has been known a system capable of recording and reproducing multimedia information including audio information, image information, digital code data and the like which are optically readable.

Such an information reproducing system is described in, for example, Japanese Patent Application No. 5-260464 filed by the applicant of the present application. In a pen-type information reproducing device as a device for reproducing the above information, when the dot code is read, the information reproducing device is manually moved in a predetermined direction and scanned. Then, in response to this scanning, the information reproducing device sequentially takes in the dot codes, the original sound is output to an audio output device such as an earphone, the original video information is displayed to a display device such as a CRT display, and the original digital code data is acquired. Is output to a printer or the like.

[0004]

However, in the above-mentioned information reproducing apparatus, when the dot code is read and reproduced, the information reproducing apparatus is mainly moved and read in one direction. Therefore, only one two-dimensional information record in a narrow range can be read in one reading, and therefore, one point to be improved is to shorten the processing time required for reading information reproduction as much as possible. It was

The present invention has been made in view of the above problems, and provides a reading device of an information reproducing apparatus which is capable of shortening the processing time required for information reproduction, in addition to the movement of information recording in one direction. The purpose is to provide.

[0006]

That is, the present invention relates to an information recording medium in which multimedia information including at least one of audio information, video information and digital code data is recorded in an optically readable code, In an information reproducing apparatus which optically reads the code by a reading optical system and converts it into original multimedia information and outputs it, the light emitted from a light source is guided to the information recording medium and a light beam from the information recording medium is also transmitted. It is characterized by comprising a rotatable vibrating mirror that reflects the bundle, and a line sensor that receives the bundle of light rays from the information recording medium reflected by the vibrating mirror.

[0007]

In this invention, the light emitted from the light source is guided to the information recording medium by the vibrating mirror. Then, multimedia information including at least one of audio information, video information, and digital code data is optically read by a reading optical system from an information recording medium recorded with an optically readable code. The read information is reflected by the vibrating mirror as a bundle of light rays, forms an image on the line sensor, is received, is converted into the original multimedia information, and is output.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a schematic diagram showing the configuration of a reading device of the information reproducing apparatus of the present invention, and FIG. 1 (b) is a plane including the central axis of the scanning surface of the information recording medium of FIG. 1 (a). It is the sectional drawing cut.

In FIG. 1, the light emitted from the light source 1 is reflected by the half mirror 3 through the illumination optical system 2 at about 90 °. The light reflected here is reflected again by the oscillating mirror 5 which is rotatable by the drive unit 4, and is illuminated on the information recording medium 7 via the reading optical system 6. The surface of the information recording medium 7 is illuminated with the direction perpendicular to the scanning direction as the longitudinal direction, and when the vibrating mirror 5 rotates, the illumination area scans in the rotational direction. The bundle of rays reflected from the illuminated information recording medium 7 is reflected by the vibrating mirror 5 via the reading optical system 6, passes through the half mirror 3 and the line sensor 8
It is designed to receive light above.

Various methods of illuminating the information recording medium are conceivable. Here, as described above, the light emitted from the light source 1 is collimated to some extent by the illumination optical system 2 and guided to the half mirror 3, and the vibrating mirror 5 is used. An example of illuminating the surface of the information recording medium 7 via the reading optical system 6 will be described.

The half mirror 3 is located anywhere on the optical axis of the reading optical system 6 between the line sensor 8 and the oscillating mirror 5 and on the optical axis of the reading optical system 6 after the light from the light source 1 is reflected. They are arranged so that the angles are matched.

The vibrating mirror 5 is rotated clockwise (C
W) and counterclockwise (CCW) can be rotated, and when reading data, either one of them is selected and used.

The dot code which is the information on the surface of the information recording medium will be described with reference to FIG. As the two-dimensional data code, for example, the dot code 10 described in Japanese Patent Application No. 5-260464 filed earlier by the applicant of the present application can be used.

The entire dot code is composed of a plurality of blocks 11, and the information itself is recorded as a white and black periodic pattern inside the data area 15 in the block. The markers 12 are arranged at the four outer corners of one data area 15, and the scanning direction can be determined by the markers 12.

That is, in the data format of the dot code 10, one block 11 includes a marker 12, a block address 13, error detection / correction data 14 of an address, and a data area 15 in which data such as voice and image is actually stored. And consists of.

The marker 12 normally has a pattern that does not appear in recording modulation. The address data 13 is data representing the position of the block 11, and the error detection / correction data 14 is used for error determination of these addresses.

The recorded data in such a format is
The data of "1" and "0" is printed, for example, like "1" with black dots and "0" without black dots, similar to a barcode.

FIG. 3 shows a block diagram of signal processing of a system for reading and reproducing such information recording. In FIG. 3, the output of the line sensor 8 is supplied to the marker detection circuit 18 via the preamplifier 16 and the frame memory 17. The output of the marker detection circuit 18 is supplied to the frame memory 17 via the data array direction detection circuit 19 and the address control unit 20. The output of the frame memory 17 is also supplied to the interpolation circuit 21.

In such a configuration, the image signal detected by the line sensor 8 which is the detector of the reading device is amplified by the preamplifier 16 and then the frame memory 1
Stored in 7. The marker detection circuit 18 detects the marker 12 from the image information stored in the frame memory 17. The data array direction detection circuit 19 detects the scanning direction based on the information of the marker 12.

In the address control circuit 20, when the data stored in the frame memory 17 is read, the address read next is given to the frame memory 17 by the signal obtained by the data array direction detection circuit 19. To be
Next, the interpolation circuit 21 performs scanning interpolation in the array direction of data while performing data interpolation. Although not shown, the process proceeds to the next step, which is a binarization circuit, a demodulation circuit, etc., and the demodulated output data is output as information by the output means such as voice.

In the information reproducing device as described above, the reading device is a handy type and is manually moved.
FIG. 4 shows an example of reading when the optical scanning range of the reading device is shorter than the horizontal length of the information recording and the device is manually moved in the horizontal direction of the information recording medium to read the information. The dot codes 10 are arranged in order from left to right on the surface of the information recording medium.

In FIG. 4A, the area to be read by one optical scan is the shaded area in the figure, and two-dimensional wide range of data can be read by manually moving the reading device left and right. You can

An enlarged view of the optical scanning portion is shown in FIG. 4 (b). Optical scanning is done in the left-right direction. The direction perpendicular to the scanning direction corresponds to the line sensor 8 which is the image plane.

Now, when the reading device is moved from left to right to read the data, since the direction is the same as the arrangement of the information, the reading may be performed in the scanning order. The scanning direction of the vibrating mirror 5 may be CCW (counterclockwise) in order to capture data.

On the contrary, when the reading device is moved from right to left and reading is performed, the order of the block 11 is reversed. Therefore, as for the information in the block, the left and right information is read in reverse.

In this case, the address of the block 11 is detected from the read marker 12 and the moving direction of the reading device is detected by increasing or decreasing the address value. As the optical scanning direction, CW (clockwise) is the direction in which data is captured. The information reproducing apparatus may be provided with driven wheels, and the scanning direction may be determined by detecting the rotation direction of the driven wheels. That is, the scanning direction shown in FIG. 4B is scanned from right to left, and the writing direction of information in one block is written in reverse by address control.
One scanning area shown in (a) is moved from right to left to read data, and the order of each block stored in the frame memory 17 is also written in reverse by address control.

Next, in the case where the reader is a hand-held type manually moved and the optical scanning range of the reader is longer than the horizontal length of the information recording, the device is manually operated in the vertical direction of the information recording medium. FIG. 5 shows an example of reading when moving the to read information. In this case, dot code 10
Are arranged in order from left to right on the surface of the information recording medium,
Further, it is assumed that the blocks 11 are arrayed from left to right and from top to bottom.

In FIG. 5A, the area to be read by one optical scan is a shaded area in the figure, and by manually moving the reading device up and down, two-dimensional wide range data is read. be able to.

An enlarged view of the optical scanning portion is shown in FIG. 5 (b). Optical scanning is performed in the left-right direction. The direction perpendicular to the scanning direction corresponds to the line sensor 8 which is the image plane.

When reading data by moving the reading device from the top to the bottom, the direction is the same as the arrangement of information,
It suffices to read in scan order. Further, the scanning direction of the vibrating mirror 5 is also CCW (counterclockwise), and data may be sequentially fetched.

On the contrary, when the reading device is moved from bottom to top for reading, one scanning area shown in FIG. 5A moves from bottom to top. In this case, the moving direction of the reading device is detected by the read marker 12. Here, although the order of the blocks 11 to be read is reverse, since the information in the blocks is in the same direction as the arrangement of the information, the rotation direction of the vibrating mirror 5 is CCW and the data is read in every optical scanning. This can be dealt with by sequentially setting the write address of the memory.

The vibrating mirror 5 used in such a reading optical system is preferably of a type called a resonance type mirror (resonant scanner). This type of vibrating mirror
Since the rotation speed is constant regardless of the rotation direction, CW, CCW
No matter which rotation direction is used, it is not necessary to change the reading timing.

In the reading optical system 6, if the scanning width is the image height y, the scanning angle is θ, the focal length of the optical system is f, and the amplitude of the vibrating mirror 5 is w, then y = 2 × w As expressed by × f × arcsin (θ / 2w), the image height y is the arcsin of the scanning angle θ.
When an arcsin θ lens that satisfies the relationship proportional to (inverse sine) is used, the scanning speed on the scanning surface becomes constant regardless of the image height (scanning position). Therefore, it becomes easy to read the dot code.

Further, the optical axis of the reading optical system 6 is the z-axis,
When the scanning direction is the y axis and the x axis is the direction orthogonal to the scanning direction, it is desirable that the anamorphic optical system has different refractive powers in the yz plane and the xz plane. In the yz plane, the relationship of the arcsin θ lens described above is satisfied, and x
In the z plane, by setting the magnification so that a predetermined amount of dot code in the vertical direction of the information recording medium is imaged in accordance with the size of the line sensor 8, it is possible to perform more accurate reading. .

According to the above embodiment of the present invention, the following constitution can be obtained. (1) The above code is optically read by a reading optical system from an information recording medium in which multimedia information including at least one of audio information, video information and digital code data is recorded as an optically readable code. In an information reproducing apparatus for converting and outputting to original multimedia information, a rotatable vibrating mirror that guides light emitted from a light source to the information recording medium and reflects a light flux from the information recording medium. A reading device for an information reproducing apparatus, comprising: a detecting unit including a line sensor for receiving a light beam bundle from the information recording medium reflected by the vibrating mirror.

(2) The reading device of the information reproducing apparatus according to (1), wherein the vibrating mirror reads the code by scanning in accordance with the start / end markers detected from the code. .

(3) Start / detected from the above code
The reading device of the information reproducing apparatus according to (1) above, wherein the order of storing the read data in the memory is changed according to the end marker.

(4) The vibrating mirror is a resonance type mirror, and the vibrating mirror is one of the above (1), (2) or (3).
A reading device of the information reproducing apparatus according to 1. (5) The above-mentioned reading optical system is composed of an inverse sine lens satisfying a relationship that the image height is proportional to the inverse sine of the scanning angle, (1), (2) or (3) above. Reading device of information reproducing device.

(6) The reading optical system is composed of an anamorphic optical system, (1),
A reading device of the information reproducing apparatus according to (2) or (3). According to the above configuration (1), in reading the information reproducing apparatus, if the normal reading direction is from left to right or from top to bottom, the code is moved in the opposite direction from right to left and from bottom to top. It can be reproduced by reading. Further, since it is possible to read a wide range of two-dimensional information record by one reading, it is possible to shorten the processing time.

Further, according to the above configuration (2), the start / end for notifying the start / end of the data in the code is performed.
By providing an end marker, the reading direction of the information reproducing apparatus can be detected by the signal, and the rotation direction of the vibrating mirror to be read can be determined. According to the configuration of (3), a start / end marker for notifying the start / end of data is provided in the code, the reading direction of the information reproducing device is detected by the signal, and the memory address order of the read data is determined. By doing so, it becomes possible to read the information reproducing apparatus in either forward or reverse directions.

Further, according to the above configuration (4), if the vibrating mirror is a resonance type, the rotation speed is substantially the same regardless of the rotating direction, so that the code can be read easily. According to the above configuration (5), the information recording medium can be scanned at a constant speed by using the arc sine lens in the reading optical system. Therefore, it is possible to read without electrical correction regardless of the position of the code on the information recording medium. According to the above configuration (6), by using the anamorphic optical system as the reading optical system, the focal length in the scanning direction and the focal length in the direction perpendicular to the scanning direction can be set independently. Therefore, it is possible to form an image while scanning at a constant speed in the scanning direction, and to form an image in the direction perpendicular to the scanning direction according to the length of the line sensor, which is a detector, in the major axis direction.

[0042]

As described above, according to the present invention, it is possible to provide a reader for an information reproducing apparatus in which the movement for reading the information record is not limited to one direction and the processing time required for reproducing the information can be shortened. can do.

[Brief description of drawings]

FIG. 1A is a schematic diagram showing a configuration of a reading device of an information reproducing apparatus of the present invention, and FIG. 1B is a surface including a central axis of a scanning surface of an information recording medium of FIG. 1A. It is the sectional drawing cut.

FIG. 2 is a diagram illustrating a dot code that is information on the surface of an information recording medium.

FIG. 3 is a block configuration diagram of signal processing of a system for reading and reproducing information recording.

FIG. 4 is a diagram illustrating a case where the reader is a hand-held type manually moved device and the optical optical scanning range of the reader is shorter than the horizontal length of the information recording, and the device is manually operated in the horizontal direction of the information recording medium. FIG. 8 is a diagram illustrating an example of reading when moving information to read information.

FIG. 5 shows a case where the reading device is a hand-held type and is manually moved, and when the optical scanning range of the reading device is longer than the horizontal length of the information recording, the device is manually moved in the vertical direction of the information recording medium. FIG. 6 is a diagram illustrating an example of reading information by reading.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light source, 2 ... Illumination optical system, 3 ... Half mirror, 4 ... Driving part, 5 ... Vibration mirror, 6 ... Read optical system, 7 ... Information recording medium, 8 ... Line sensor, 10 ... Dot code, 11
... block, 12 ... marker, 13 ... block address,
14 ... Error detection, error correction data, 15 ... Data area, 16 ... Preamplifier, 17 ... Frame memory, 18
... Marker detection circuit, 19 ... Data array direction detection circuit, 2
0 ... Address control unit, 21 ... Interpolation circuit.

Claims (6)

[Claims] 1. A code is optically read by an optical system from an information recording medium in which multimedia information including at least one of audio information, video information and digital code data is recorded as an optically readable code. In an information reproducing device that reads the data, converts it to the original multimedia information and outputs it, a rotatable vibration that guides the light emitted from the light source to the above information recording medium and reflects the light flux from the information recording medium. A reading device for an information reproducing apparatus, comprising: a mirror; and a detecting means including a line sensor for receiving a light beam from the information recording medium reflected by the vibrating mirror. 2. The reading device of the information reproducing apparatus according to claim 1, wherein the vibrating mirror reads the code by scanning according to a start / end marker detected from the code. 3. The reading device of the information reproducing apparatus according to claim 1, wherein the order of storing the read data in the memory is changed according to the start / end marker detected from the code. 4. The reading device of the information reproducing apparatus according to claim 1, wherein the vibrating mirror is a resonance type mirror. 5. The information reproducing apparatus according to claim 1, 2 or 3, wherein the reading optical system is composed of an inverse sine lens satisfying a relation that an image height thereof is proportional to an inverse sine of a scanning angle. Device reader. 6. The reading device of the information reproducing apparatus according to claim 1, wherein the reading optical system is composed of an anamorphic optical system.