JP4655037B2 - Method and apparatus for detecting position of optical recording medium and recording apparatus provided with the apparatus - Google Patents

Description

  The present invention relates to a method and an apparatus for detecting a position of an optical recording medium on a recording apparatus, particularly a printing start end, when printing on the surface of an optical recording medium such as a CD-R or a DVD-R. .

  In recent years, printers that can print on the surface of an optical recording medium typified by a compact disc such as a CD-R are on the market. When printing on a disk-shaped optical recording medium with such a printer, a dedicated tray is used so that the optical recording medium can move in an area scanned by the print head when printing on normal paper. The dedicated tray includes a support portion for supporting the optical recording medium, and printing can be performed on the surface of the optical recording medium by the print head by moving the dedicated tray in the paper transport direction of the printer, that is, the sub-scanning direction.

In printing on such an optical recording medium, accurate printing cannot be performed unless the printer recognizes the size and position of the optical recording medium. Therefore, conventionally, a marker is attached to a predetermined position of the dedicated tray, the marker is read by a sensor, and the position of the optical recording medium is indirectly obtained from the positional relationship between the marker and the support portion of the optical recording medium. It was.
Japanese Patent Laid-Open No. 11-58712 JP-A-2-203216

  However, even if the optical recording medium is set in the support portion, the optical recording medium may move slightly in the support portion, and the positional relationship between the marker and the support portion of the optical recording medium is precisely a manufacturing tolerance. The position of the optical recording medium may not always be accurately recognized even if the position of the marker can be detected. If the printing operation is performed in this state, printing cannot be accurately performed at a predetermined position on the surface of the optical recording medium, resulting in an optical recording medium with low print quality.

  Further, in the conventional method of detecting only the marker, since the optical recording medium itself is not detected, when the optical recording medium does not exist, a so-called blanking may be performed on the tray.

  Therefore, an object of the present invention is to provide a method and an apparatus for detecting the position of an optical recording medium that accurately recognizes the position of the optical recording medium by directly obtaining the position of the optical recording medium and that does not cause adverse effects such as low printing quality and idle printing. It is to provide.

  To achieve the above object, the optical recording medium position detection method according to the first aspect of the present application is capable of supporting the optical recording medium, a step of detecting a change in brightness by scanning the sensor in the main scanning direction, An optical recording medium is placed on a disc tray having a lightness color contrasting with the color of the printing surface of the optical recording medium, the optical recording medium being in the sub-scanning direction of the optical recording medium. Detecting the positions of both ends of the optical recording medium in the main scanning direction by reciprocating the sensor in the main scanning direction at a position across the optical recording medium; and the optical recording from the positions of both ends of the optical recording medium in the main scanning direction. Determining the center of the medium in the main scanning direction; moving the sensor to a predetermined position in the main scanning direction of the optical recording medium to detect both ends of the optical recording medium in the sub-scanning direction; Main scan direction Reciprocating the disc tray in a sub-scanning direction at a predetermined position and detecting positions of both ends of the optical recording medium in the sub-scanning direction by the sensor; and from positions of both ends of the optical recording medium in the sub-scanning direction Determining the center of the optical recording medium in the sub-scanning direction, and determining the print start end of the optical recording medium from the center of the optical recording medium in the main scanning direction and the center of the optical recording medium in the sub-scanning direction. It is characterized by this.

  According to the present invention, the sensor can detect the difference in brightness between the color of the printing surface of the optical recording medium and the color of the disc tray to detect the position of the peripheral edge of the optical recording medium. Therefore, the positions of both ends of the optical recording medium in the main scanning direction can be detected by scanning in the main scanning direction of the sensor, and the positions of both ends of the optical recording medium in the sub scanning direction can be detected by moving the disc tray in the sub scanning direction. it can. Then, the respective centers are obtained from the positions of both ends in the main scanning direction and the sub-scanning direction, and based on this, the size or type of the optical recording medium and the printing start end of the optical recording medium can be obtained.

  Therefore, in the present invention, since the position of the optical recording medium itself is detected instead of detecting only the position marker as in the prior art, a more accurate position can be obtained, and thus the printing surface of the optical recording medium can be obtained more accurately. Printing can be performed. Further, since the presence of the optical recording medium itself can be detected, printing without the optical recording medium, that is, idling can be prevented.

  According to a second aspect of the present invention, in the optical recording medium position detection method described in the first aspect, the sensor is provided in a carriage having a print head. . According to the present invention, since the carriage can be used for detection of a sensor in the main scanning direction in addition to scanning during printing, it is not necessary to add a new configuration for scanning the sensor in the main scanning direction.

  The invention of the third aspect of the present application is the optical recording medium position detection method described in the first aspect or the second aspect, wherein the color of the printing surface of the position marker and the optical recording medium is white, The disc tray has a black color. According to the present invention, it is possible to clearly detect a difference in brightness between colors of an optical recording medium and a disc tray.

  The fourth aspect of the present invention is the optical recording medium position detecting method according to any one of the first to third aspects, wherein the position marker is rectangular, and the specific position of the position marker is It is a side on the upstream side of the position marker. According to the present invention, the position in the sub-scanning direction to be moved to detect the main scanning direction of the optical recording medium is accurately determined.

  The fifth aspect of the present invention is the optical recording medium position detecting method according to any one of the first to fourth aspects, wherein the specific position of the position marker is an 8 cm optical recording medium and a 12 cm light. It is characterized in that it is positioned so that the positions of both ends of the recording medium in the main scanning direction can be detected. According to the present invention, the positions of both ends in the main scanning direction can be detected at the same position regardless of whether the disk placed on the disk tray is an 8 cm optical recording medium or a 12 cm optical recording medium.

  According to a sixth aspect of the present invention, in the optical recording medium position detection method according to any one of the first to fifth aspects, the predetermined position in the main scanning direction of the optical recording medium is 8 cm light. The recording medium and the 12 cm optical recording medium are positioned so that the positions of both ends in the sub-scanning direction can be detected. According to the present invention, the positions of both ends in the sub-scanning direction can be detected at the same position regardless of whether the disk placed on the disk tray is an 8 cm optical recording medium or a 12 cm optical recording medium.

  According to a seventh aspect of the present invention, in the optical recording medium position detection method according to any one of the first to sixth aspects, the optical recording medium is a CD-R. Is. According to the present invention, it is possible to accurately print on a CD-R having a normally white printing surface.

  Further, the optical recording medium position detection apparatus according to the eighth aspect of the present application is capable of supporting a sensor capable of detecting a change in brightness, means capable of scanning the sensor in a main scanning direction, and the optical recording medium, A disk tray having a position marker detectable by a sensor and having a color contrasting with the color of the printing surface of the optical recording medium; means for scanning the disk tray in a sub-scanning direction; and the optical recording medium The sensor is reciprocated in the main scanning direction at a position crossing the optical recording medium placed on the disc tray in the sub-scanning direction, and the positions of both ends of the optical recording medium in the main scanning direction are detected. In order to determine the center of the optical recording medium in the main scanning direction from the positions of both ends of the optical recording medium in the main scanning direction, and to detect both ends of the optical recording medium in the sub scanning direction, the sensor is moved forward. The optical recording medium is moved to a predetermined position in the main scanning direction, the disk tray is reciprocated in the sub scanning direction at the predetermined position in the main scanning direction, and the positions of both ends of the optical recording medium in the sub scanning direction by the sensor. The center of the optical recording medium in the sub-scanning direction is obtained from the positions of both ends of the optical recording medium in the sub-scanning direction, and the center of the optical recording medium in the main scanning direction and the center of the optical recording medium in the sub-scanning direction are obtained. And a control means that can be controlled so as to obtain the printing start end of the optical recording medium.

  According to the present invention, the sensor can detect the position around the optical recording medium by detecting the brightness difference between the color of the printing surface of the optical recording medium and the color of the disc tray. Therefore, the positions of both ends of the optical recording medium in the main scanning direction can be detected by scanning in the main scanning direction of the sensor, and the positions of both ends of the optical recording medium in the sub scanning direction can be detected by moving the disc tray in the sub scanning direction. it can. Then, the respective centers are obtained from the positions of both ends in the main scanning direction and the sub-scanning direction, and based on this, the size or type of the optical recording medium and the printing start end of the optical recording medium can be obtained.

  Therefore, in the present invention, since the position of the optical recording medium itself is detected instead of detecting only the position marker as in the prior art, a more accurate position can be obtained, and thus the printing surface of the optical recording medium can be obtained more accurately. Printing can be performed. Further, since the presence of the optical recording medium itself can be detected, printing without the optical recording medium, that is, idling can be prevented.

  According to a ninth aspect of the present invention, in the optical recording medium position detecting device according to the eighth aspect, the sensor is provided in a carriage having a print head. . According to the present invention, since the carriage can be used for detection of a sensor in the main scanning direction in addition to scanning during printing, it is not necessary to add a new configuration for scanning the sensor in the main scanning direction.

  Further, the invention of the tenth aspect of the present application is the optical recording medium position detecting device according to the eighth aspect or the ninth aspect, wherein the color of the printing surface of the position marker and the optical recording medium is white, The disc tray has a black color. According to the present invention, it is possible to clearly detect a difference in brightness between colors of an optical recording medium and a disc tray.

  The eleventh aspect of the present invention is the optical recording medium position detection device according to any one of the eighth to tenth aspects, wherein the specific position in the sub-scanning direction of the optical recording medium is 8 cm light. The recording medium and the 12 cm optical recording medium are positioned so that the positions of both ends in the main scanning direction can be detected. According to the present invention, the positions of both ends in the main scanning direction can be detected at the same position regardless of whether the disk placed on the disk tray is an 8 cm optical recording medium or a 12 cm optical recording medium.

  The twelfth aspect of the present invention is the optical recording medium position detecting device according to any one of the eighth to eleventh aspects, wherein the predetermined position in the main scanning direction of the optical recording medium is 8 cm light. The recording medium and the 12 cm optical recording medium are positioned so that the positions of both ends in the sub-scanning direction can be detected. According to the present invention, the positions of both ends in the sub-scanning direction can be detected at the same position regardless of whether the disk placed on the disk tray is an 8 cm optical recording medium or a 12 cm optical recording medium.

  The invention according to the thirteenth aspect of the present invention is the optical recording medium position detecting device according to any one of the eighth to twelfth aspects, wherein the optical recording medium is a CD-R. Is. According to the present invention, it is possible to accurately print on a CD-R having a normally white printing surface.

  A recording apparatus according to a fourteenth aspect of the present application is characterized by including the optical recording medium position detection apparatus according to any one of the eighth to thirteenth aspects. According to the present invention, it is possible to provide a recording apparatus capable of performing accurate printing on an optical recording medium.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an ink jet printer having an optical recording medium position detecting apparatus according to the present invention, FIG. 2 is a side sectional view showing the periphery of the carriage of the ink jet printer, and FIG. It is a front view which shows the state in which R was mounted. 4 and 5 are flow charts showing the method for detecting the position of the optical recording medium of the present invention.

  In FIG. 1, reference numeral 1 denotes an ink jet printer. The ink jet printer 1 includes a printer main body 3 having a paper feed button 2 and a paper discharge unit 7 formed on the front side of the printer main body 3. The inkjet printer 1 is usually for printing on paper. When paper is used as a printing medium, a paper feed tray for stocking paper can be attached to the rear side of the printer body 3. It has become.

  As shown in FIG. 2, a carriage 9 is provided inside the printer body 3. The carriage 9 is positioned at the home position on the right side of the printer 1 when the printing operation is not performed, and can reciprocate in the width direction of the printer main body 3, that is, the main scanning direction during printing. A print head 11 is provided at the lower end of the carriage 9 and a sensor 10 for detecting a CD-R (abbreviation of compact disk recordable) which is an optical recording medium. This sensor 10 detects the lightness of the color and detects the presence of an object by changing the lightness. Specifically, it detects the lightness difference between the white printed surface of the CD-R and a black disc tray described later. Thus, the presence of the CD-R is detected.

  A platen 14 is provided at a position facing the print head 11 to support the paper from below during printing. A transport roller 13 including a transport drive roller 13a and a transport driven roller 13b is provided on the upstream side of the print head 11, and a paper discharge drive roller 15a and a paper discharge driven roller 15b are provided on the downstream side of the print head 11. A paper discharge roller 15 is provided. The conveyance drive roller 13 a can drive a disk tray (described later) in the front-rear direction of the inkjet printer 1 by rotating the conveyance drive motor 16 forward or backward.

  Returning to FIG. 1, a disc tray receiving portion 17 is formed on the front side of the printer body 3, and the tray attachment 19 can be fully inserted into the disc tray receiving portion 17 from the front side until it comes into contact with contact. ing. The tray attachment 19 is composed of a flat plate-like black plastic supported so as to be slidable in the front-rear direction along a tray support 21 provided on the left and right sides and a guide formed inside the tray support 21. And a disc tray 23. On the disc tray 23, there is formed a storage portion 25 for an optical recording medium to be printed such as a CD-R, and at the center thereof is a projection 26 having the same diameter as the hole formed in the center of the optical recording medium. Is formed. By inserting holes of optical recording media of different sizes such as 12 cm CD-R and 8 cm CD-R into the protrusions 26, the optical recording media can be arranged concentrically with respect to the storage unit 25. The disc tray 23 is printed with white and rectangular position markers 27 at predetermined positions. The operation of the position marker 27 will be described later.

  When the tray attachment 19 is inserted, the disc tray receiving portion 17 is arranged so that the flat disc tray 23 is disposed between the discharge driving roller 15a and the discharge driven roller 15b and between the conveyance driving roller 13a and the conveyance driven roller 13b. Thus, the disc tray 23 can move between the tray supports 21 in the front-rear direction of the printer by receiving the driving force of the transport driving roller 13a and the discharge driving roller 15a. ing.

  In addition, the inkjet printer 1 includes a control device 29 that stores a flow for detecting the position of the optical recording medium and can perform coordinate system calculations and the like.

  Next, a procedure for printing on CD-Rs 8 and 12 as an example of an optical recording medium will be described, and a position detecting device and a position detecting method for the optical recording medium of the present invention will also be described. In the following description, the rear side of the printer 1, that is, the direction in which the tray attachment 19 is pushed in is defined as the + Y direction, and the opposite direction is defined as the -Y direction, and the right direction of the printer 1 in FIG. The opposite direction is defined as the -X direction. Here, the + Y direction and the −Y direction correspond to the paper transport direction in the printer, that is, the sub-scanning direction, and the + X direction and the −X direction correspond to the scanning direction of the carriage 9, that is, the main scanning direction.

  (1) First, the tray support 21 of the tray attachment 19 is pushed into the printer main body 3 from the disc tray receiving portion 17 and mounted (step 101 in FIG. 4), and for the paper such as the transport roller 13 and the discharge roller 15 Set the transport drive system to the release state.

  (2) The CD-R is placed on the disc tray 23, and the disc tray 23 is fully pushed into the printer body 3 (step 103). Then, the release state of the transport roller 13 is released, so that the disk tray 23 can be transported.

  (3) When the paper feed button 2 is pressed in this state (step 105), the carriage 9 moves from the home position to the vicinity of the position marker 27 (step 107).

(4) Further, after the carriage 9 is moved, the conveying roller 13 is rotated forward or backward to move the disc tray 23 in the −Y direction or the + Y direction, and the sensor 10 provided on the carriage 9 starts to search for the position marker 27. (Step 107).
In step 103, when the disc tray 23 is fully pushed, the position marker 27 is set so that the Y-direction position of the position marker 27 is the same as the Y-direction position of the sensor 10. (Step 109).
In step 103, if the disk tray 23 is not fully pressed, the search tray moves the disk tray 23 back and forth, and stops at the position where the sensor 10 faces the position marker 27 (step 111).

  (5) When the sensor 10 detects the position marker 27 in step 109 or step 111, the disk tray 23 is moved in the -Y direction to detect the side 28 on the upstream side (+ Y direction side) of the position marker 27 (step 113). This detection is performed by obtaining the boundary based on the brightness difference between the white position marker 27 and the black disc tray 23.

  By detecting the upstream side of the position marker 27, the position in the Y direction (the position indicated by the line m in FIG. 3) to be moved in order to detect the X direction of the CD-Rs 8 and 12 is determined. The conveyance drive motor 16 is driven so that the CD-R moves (step 115 in FIG. 5).

  Note that a CD-R 12 having a size of 12 cm or a CD-R 8 having a size of 8 cm may be arranged in the storage unit 25. Therefore, when detecting the CD-R in the X direction, any of these CD-Rs has a writing surface. The CD-R is moved to a position in the Y direction so that it can cross 31 (white surface). FIG. 3 shows both a 12 cm CD-R12 and an 8 cm CD-R8, but this is for convenience of explanation, and it is actually only one CD-R. Needless to say.

  (6) Next, the carriage 9 is reciprocally scanned, and the X direction ends of the CD-Rs 8 and 12 are indicated by the sensor 10 (denoted by reference numerals 12a and 12b for the 12 cm CD-R12 and denoted by reference numerals 8a and 8b for the 8 cm CD-R8). ) Is detected (step 117), and the coordinates of the intermediate point are calculated by the control device 29 based on the detected position data at both ends in the X direction (step 119). Since the CD-R has a perfect circle shape, the obtained coordinates correspond to the center of the CD-R in the X direction.

(7) Next, by driving the carriage 9, to a predetermined position in the X direction for detecting the Y-direction of the CD-R8,12 moves over the disk tray 23 (step 121), given the X direction Since the position is mechanically determined at the time when the tray attachment 19 is inserted into the disc tray receiving portion 17, the control device 29 stores information on the predetermined position (position indicated by line n in FIG. 3) stored in advance. The carriage 9 is driven based on the above.
It should be noted that the predetermined position in the X direction is also a position at which the CD-R 8, 12 of any size can cross the writing surface 31 (white surface) when detecting the Y direction of the CD-R 8, 12. It is the same as above.

When the carriage 9 is moved to a predetermined position in the X direction, the conveyance drive motor 16 is driven to reciprocate the disk tray 23 in the Y direction, and both ends of the CD-Rs 8 and 12 in the Y direction by the sensor 10 , 12d, and 8c CD-R8 (represented by 8c, 8d) (step 123). Based on the detected position data at both ends in the Y direction, the control device 29 calculates the coordinates of the intermediate point to determine the center of the CD-R in the Y direction (step 125).

  (8) Since the center coordinate C of the CD-R is known from the center in the X direction and Y direction of the CD-R obtained in the above steps 119 and 125, the CD-R diameter (ie, the type of the CD-R) and The printing start end (front end in the -Y direction) of the CD-R is obtained by the control device 29 (step 127). The control device 29 develops data to be printed based on the information and executes printing (step 127).

In the above embodiment, the CD-R has been described as an example of the optical recording medium. However, in addition to this, a compact disc read-only memory (CD-ROM) and a compact disc rewritable (CD-ROM) are used. RW (Compact Disc
ReWritable)), Dividi (DVD (Digital Versatile Disc)) and other disc-shaped recorded media and disc-recordable media are also included in the optical recording media.

  According to the present invention, the sensor can detect the position around the optical recording medium by detecting the brightness difference between the color of the printing surface of the optical recording medium and the color of the disc tray. Therefore, the positions of both ends of the optical recording medium in the main scanning direction can be detected by scanning in the main scanning direction of the sensor, and the positions of both ends of the optical recording medium in the sub scanning direction can be detected by moving the disc tray in the sub scanning direction. it can. Then, the respective centers are obtained from the positions of both ends in the main scanning direction and the sub-scanning direction, and based on this, the size or type of the optical recording medium and the printing start end of the optical recording medium can be obtained.

  Therefore, in the present invention, since the position of the optical recording medium itself is detected instead of detecting only the position marker as in the prior art, a more accurate position can be obtained, and thus the printing surface of the optical recording medium can be obtained more accurately. Printing can be performed. Further, since the presence of the optical recording medium itself can be detected, printing without the optical recording medium, that is, idling can be prevented.

1 is a perspective view of an ink jet printer including an optical recording medium position detection device of the present invention. FIG. 3 is a side sectional view showing the periphery of a carriage of an inkjet printer. The front view which shows the state in which CD-R was mounted on the disc tray. It is a flowchart which shows the position detection method of the optical recording medium of this invention, and shows the process of the first half. It is a flowchart which shows the position detection method of the optical recording medium of this invention, and shows the latter half process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 Paper feed button, 3 Printer main body, 7 Paper discharge part, 8 8cmCD-R, 8a, 8b 8cm CD-R both ends of X direction, 8c, 8d 8cm CD-R both ends of Y direction, 9 Carriage, 10 sensor 11 print head, 12 12 cm CD-R, 12 a, 12 b 12 cm CD-R both ends in X direction, 12 c, 12 d 12 cm CD-R both ends in Y direction, 13 transport rollers, 15 paper discharge rollers, 16 transport drive motor, 17 disk tray receiving Part, 19 tray attachment, 21 tray support, 23 disc tray, 25 storage part, 27 position marker, 28 upstream side of the position marker, 29 control device, 31 writing surface, m Y direction for detecting the X direction N position in the X direction to detect the Y direction Center coordinates of C CD-R

Claims (11)

A sensor capable of detecting a change in brightness between the color of the disc tray capable of supporting the optical recording medium and a color having a brightness different from the color of the disc tray is moved in the main scanning direction, and is provided at a predetermined position based on the brightness difference. Detecting a boundary between the position marker and the disc tray,
Detecting the positions of both ends of the optical recording medium in the main scanning direction by moving the sensor in the main scanning direction on the basis of the position of the boundary detected by the sensor ;
Obtaining a center in the main scanning direction of the optical recording medium from positions at both ends in the main scanning direction of the optical recording medium;
Moving the sensor to a predetermined position in the main scanning direction of the optical recording medium to detect both ends of the optical recording medium in the sub-scanning direction;
Moving the disk tray in the sub-scanning direction at a predetermined position in the main scanning direction, and detecting positions of both ends of the optical recording medium in the sub-scanning direction by the sensor;
Obtaining the center of the optical recording medium in the sub-scanning direction from the positions of both ends of the optical recording medium in the sub-scanning direction;
Obtaining a printing start end of the optical recording medium from the center in the main scanning direction of the optical recording medium and the center in the sub-scanning direction;
A method for detecting the position of an optical recording medium.   2. The optical recording medium position detecting method according to claim 1, wherein the sensor is provided in a carriage having a print head.   3. The optical recording medium position detecting method according to claim 1, wherein the color of the disc tray is black and the color different from the color of the disc tray is white. Position detection method.   4. The optical recording medium position detection method according to claim 1, wherein the predetermined positions in the main scanning direction of the optical recording medium are the positions of both ends in the sub-scanning direction of both the 8 cm optical recording medium and the 12 cm optical recording medium. An optical recording medium position detecting method, wherein the optical recording medium is positioned so as to be detected.   The optical recording medium position detecting method according to any one of claims 1 to 4, wherein the optical recording medium is a CD-R. A sensor capable of detecting a change in brightness;
Means for reciprocating the sensor in the main scanning direction;
An optical recording medium can be supported, and a disc tray having a lightness color different from the color of the printing surface of the optical recording medium;
Means for moving the disk tray in the sub-scanning direction;
The sensor is moved in the main scanning direction, the detecting the position marker and the boundary of the disc tray provided at a predetermined position on the basis of the brightness difference between the different colors of the disc tray color and brightness, and the detected The position of both ends of the optical recording medium in the main scanning direction is detected by moving the sensor in the main scanning direction on the basis of the position of the boundary, and the optical recording is performed from the positions of both ends of the optical recording medium in the main scanning direction. In order to determine the center of the medium in the main scanning direction and detect both ends of the optical recording medium in the sub-scanning direction, the sensor is moved to a predetermined position in the main scanning direction of the optical recording medium, The disk tray is moved in the sub-scanning direction at a predetermined position, the positions of both ends of the optical recording medium in the sub-scanning direction are detected by the sensor, and the sub-scanning of the optical recording medium is detected. The center in the sub-scanning direction of the optical recording medium is obtained from the positions of both ends in the direction, and the printing start end of the optical recording medium is obtained from the center in the main scanning direction of the optical recording medium and the center in the sub-scanning direction. An optical recording medium position detecting device comprising: a control means that can be controlled as described above.   7. The optical recording medium position detecting device according to claim 6, wherein the sensor is provided in a carriage provided with a print head.   8. The optical recording medium position detecting device according to claim 6, wherein the color of the disc tray is black, and the color different from the color of the disc tray is white. Position detection device.   9. The optical recording medium position detecting device according to claim 6, wherein the predetermined position in the main scanning direction of the optical recording medium is sub-scanning of both the 8 cm optical recording medium and the 12 cm optical recording medium. An optical recording medium position detecting apparatus, wherein the position is detected so that positions of both ends in a direction can be detected.   10. The optical recording medium position detecting device according to claim 6, wherein the optical recording medium is a CD-R.   A recording apparatus comprising the optical recording medium position detection device according to claim 6.

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