JPS6271377A - Optical beam scanning device - Google Patents

Abstract

PURPOSE:To attain miniaturization and cost reduction by providing a sub- scanning mirror, a scanning sheet holding means of circular arc shape having a center shaft concident with its drive shaft and a positioning means. CONSTITUTION:An optical beam 2 transmitting through an image forming lens 4 from a laser light source 1 via a modulator 6 and a rotary polygon mirror 3 is made incident on a reflection plane 10a of a sub-scanning mirror 10 and reflected. A recording sheet 5 is held in a circular arc shape under the mirror 10 by a record holding means 11 and the center axis of the circular arc face is coincident with the rotary shaft of the mirror 10. The optical beam 2 applies main scanning to the recording body 5 in the arrow B and the main scanning line is moved in the arrow D gradually by the turning of the mirror 10 for sub scanning. On the other hand, the recording medium 5 is carried on the holding face 11a by rollers 13A,13b and a recording medium feeding plate 19 positions the recording medium 5 in the sub-scanning direction and the recording medium 5 is moved in the arrow G by the biasing roller 23, the side ridge is brought into contact with the guide plate 22 to position in the main scanning direction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a light beam scanning device in which a light beam is scanned by an optical deflector.
The present invention relates to a light beam scanning device that can achieve a cost reduction of 1 or more.

(Technical Background and Prior Art of the Invention) Conventionally, a beam scanning device that deflects a light beam using an optical deflector and scans a scanning sheet relatively two-dimensionally has been used for various types of scanning recording scanning, scanning reading scanning, etc. Widely used in the neck, etc. Two-dimensional f8 scanning of the light beam in these light beam scanning devices d involves deflecting the light beam with an optical deflector to main scan the scanning sheet, and
This is performed by relatively moving the light beam and the scanning sheet in a sub-scanning direction that is substantially orthogonal to the main scanning direction. However, in the conventional apparatus, various problems have arisen, such as the apparatus becoming larger due to the means for performing the sub-scanning, and the optical system becoming complicated and expensive. Hereinafter, the problems of the conventional light beam scanning device will be explained with reference to FIGS. 7 and 8. In the light beam scanning device shown in FIG.
A light beam 102 emitted from the light beam 101 enters a rotating polygon mirror 103, which is an optical deflector, and is reflected and deflected as the rotating polygon mirror 103 rotates in the direction of arrow A. Rotating polygon v1
The light beam 102 reflected by the light beam 103 passes through an fθ lens 104, which is an imaging lens, provided on the optical path, and then main-scans the scanning sheet 105 in the direction of arrow B. The scanning sheet 105 rotates in the main scanning direction as the rotating drum 10G rotates while being held between a rotating drum 10G rotating in the direction of arrow C and a pair of rollers 107A and 107B provided on the rotating drum. Sub-scanning is performed by being conveyed in the direction of arrow 0, which is substantially orthogonal to each other.

Therefore, the light beam 102 is thus conveyed in the direction indicated by the arrow (QJ constant scanning), and is repeatedly main-scanned in the direction of the arrow B over the scanning sheet 105.
05 is scanned two-dimensionally.

However, in the above-mentioned apparatus, sub-scanning is performed by moving the scanning sheet, but during sub-scanning, load fluctuations on the motor 108 are suppressed to prevent uneven sub-scanning from occurring. Therefore, as shown in the figure, it is necessary to provide a space in which one scanning sheet can be placed, such as by placing support stands 109 and 110 that support the scanning sheet 105 before and after the scanning position by the light beam. be.

For this reason, the J3 in the above-mentioned device requires a space with a length of at least two scanning sheets in the sub-scanning direction.
There is a problem that the entire device becomes larger. Further, the rotating drum 10G that conveys the scanning sheet has a width t13 larger than the width of the scanning sheet in order to stably convey the scanning sheet.
Since a motor 108 for rotating the drum 06 is further provided in the width direction of the rotating drum, the above-mentioned device also has a large capacity in the main scanning direction.

Furthermore, in order to perform highly accurate scanning on the scanning sheet while conveying the scanning sheet, it is necessary to strictly control the motor so that the scanning sheet can be conveyed at a constant speed in the correct direction with high precision. However, since a highly accurate motor that can be controlled as described above is expensive, there is also the problem that the cost of the entire device increases significantly. In addition, in order to stably convey the scanning sheet, the rollers 107Δ, 107
B is essential, but because of the provision of these rollers, it is not possible to scan both ends of the scanning sheet in the sub-scanning direction. For example, if the device is a light beam recording device, both ends I can't meet the request to make it Black Edge.

As described above, a light beam scanning device that performs sub-scanning by conveying a scanning sheet has various problems. In view of these problems, a device has been proposed that performs sub-scanning without moving the scanning sheet.Hereinafter, a light beam scanning device with a fixed scanning sheet will be described with reference to FIG. Note that the same parts as those in the apparatus shown in FIG. 7 are given the same numbers and their explanations will be omitted.

The apparatus shown in FIG. 8 includes a rotating polygon mirror 103 that rotates in the direction of the arrow to deflect the light beam 102 anti-tA and performs main scanning on the scanning sheet 111 in the direction of arrow B, and A sub-scanning galvanometer mirror 112 is installed, which rotates at a high speed and deflects the light beam 102 by one direction so that the main scanning line moves in the direction of arrow E on the scanning sheet 111 fixed at a predetermined position. In other words, the sub-scanning galvanometer mirror 112 is 1
While scanning a scanning sheet, the light beam 102 rotates once in the direction of arrow C at a low speed. The entire surface can be scanned in two-dimensional directions. When the sub-scanning galvanometer mirror 112 finishes scanning one scanning sheet, it returns to its original position and prepares for scanning the next scanning sheet. Further, an fθ lens 113 which is an imaging lens is provided between the sub-scanning galvanometer mirror 112 and the scanning sheet 111, and this fθ lens is moved at a constant angular velocity by the rotating polygon mirror 103 and the sub-scanning galvanometer mirror 112. The light beam that is reflected and deflected by the scanner is caused to scan linearly at a constant speed on the flat scanning sheet surface.

By the way, in the device described in -1-, the rotating polygon mirror 103
In order to make the light beam 102, which is deflected by and takes a wide optical path, enter the reflecting surface of the relatively small sub-scanning galvanometer mirror 112, the optical path of the tip beam 102 is focused, and after moving this focusing position, Rotating polygon mirror 1
The light beam 102 is expanded so that the deflection caused by 03 is visible.
A relay lens 114 is provided to adjust the optical path. The sub-scanning galvanometer mirror 112 is arranged at a position where the optical path of the light beam 102 is focused by the relay lens 114, and the light beam 102 is made completely incident on the sub-scanning galvanometer mirror 112 by the relay lens 114 and is deflected. be done. After being reflected and deflected by the sub-scanning galvanometer mirror 112, the light beam 102 widens its optical path again at an angle corresponding to the deflection of the rotating polygon m 103, so that a main scanning line of the necessary length is formed on the scanning sheet 111. can get.

However, in the apparatus shown in FIG. 8, in addition to the imaging lens 113, the relay lens 114 is added by 5g as described above, so the optical system becomes complicated, and it is difficult to achieve sufficient miniaturization of the apparatus. I can't.

There is also the problem that the provision of the relay lens increases the number of optical elements, increasing manufacturing costs.

(Object of the Invention) The present invention has been made in view of the above problems, and sub-scanning is performed without moving the scanning sheet, and various problems such as an increase in the size of the device due to the movement of the scanning sheet. To provide a light beam scanning device capable of solving the above problems, further downsizing the entire H device, and reducing manufacturing costs by performing scanning without using a complicated optical system equipped with expensive optical elements. The purpose is to

(Structure of the Invention) A light beam scanning device of the present invention includes a main scanning optical deflector that is installed on the optical path of a light beam emitted from a beam light source and deflects the light beam.

an imaging lens provided on the optical path of the light beam deflected by the main scanning optical deflector; a mirror provided on the optical path of the light beam that has passed through the imaging lens and reflecting the light beam with a reflective surface; The rotation axis is approximately about the intersection of a plane containing the optical path of the light beam passing through the imaging lens or a plane parallel to the plane and a plane perpendicular to the optical axis of the imaging lens. a sub-scanning mirror, and a scanning sheet that holds a scanning sheet in an arcuate shape having a central axis that substantially coincides with the drive axis of the sub-scanning mirror.
- The first feature is that it includes a holding means.

In other words, in the light beam scanning device of the present invention, since the scanning sheet is fixed by the scanning sheet holding means, it is difficult to move the device over a large distance in the sub-scanning direction, as when carrying the scanning sheet to perform IDI scanning. It is no longer necessary to use a 100% auxiliary device, and the entire device can be made more compact. Also,
The light beam reflected by the main scanning optical deflector passes through the main scanning imaging lens and is directly reflected by the In+ scanning mirror for sub-scanning, so there is no need to provide a relay lens, etc., and the optical system is simple. , Cheap ones scream. Note that the light beam whose optical path has been widened by being deflected by the main scanning optical deflector is incident on the sub-scanning mirror, so it must be a long mirror that extends in the main scanning direction due to the design of the pre-receiving system. is preferred.

By the way, as mentioned above, in the apparatus of the present invention, the scanning of the light beam is performed on the scanning sheet held by the scanning sheet holding means, so that the scanning sheet is accurately positioned on the holding surface of the scanning sheet holding means. It is necessary to be targeted.

Therefore, the light beam i[scanning device of the present invention has a guide plate and a guide plate provided at one side end of the scanning sheet 1-holding means to protrude upward as a means for positioning the scanning sheet on the holding surface in the main scanning direction. a first position below the sheet holding surface of the scanning sheet holding means, the upper end of which is on the holding surface;
The guide is movably provided so as to be able to take a second position where it retreats from the deep holding surface, and moves the scanning sheet on the holding surface in the first position toward one end of the scanning sheet holding means. The second feature is that it has a width adjusting roller that can be brought into contact with the plate.

(Embodiment) Hereinafter, an embodiment of the tree 5 will be described with reference to the drawings.

FIG. 1 is a perspective view showing an outline of a light beam recording device which is an embodiment of the light beam scanning device of the present invention.

The light beam 2 emitted from the Rade light source 1 is modulated by the modulator 6 which is modulated by the modulator drive circuit 7 based on the signal emitted from the image signal output circuit 8 which outputs the image signal. The light is incident on the rotating polygon mirror 3, which is a main scanning optical deflector, and is deflected in the direction of the arrow. As the laser light source 1, I-I Q-N e laser, Ar
In addition to lasers, a laser light source that is a combination of a semiconductor laser and a beam shaping optical system is used. Also,
When using a laser light source that can be directly modulated, such as a semiconductor laser, the laser light source may be directly controlled to modulate the light beam without specifically providing the modulator 6 in the optical path of the light beam 2. can. In addition to the rotating polygon mirror described above, other types of optical deflectors such as a galvanometer mirror and an acousto-optic optical deflector (80D>) may be used as the main scanning optical deflector.

The light beam 2 deflected by the rotating polygon mirror 3 passes through an imaging lens 4 such as a θ lens provided on the optical path, and then is driven by a motor 9 to rotate at a low speed in the direction of arrow C. , a long S1 scanning mirror 1 extending in the main scanning direction
0 and is reflected by the reflective surface 1()a. Further, below the sub-scanning mirror 10, on the optical path of the light beam 2 reflected by the sub-scanning mirror 10, a recording medium 5 in the form of a sheet such as photographic film or photographic paper is held in an arc shape. It is held in an arcuate shape by a recording medium holding means 11 having a surface 11a. This holding means 11 is formed by, for example, bending a plate-like object or integrally molding it using synthetic resin or the like. Further, the central axis of the circular arc surface formed by the recording body 5 substantially coincides with the rotation axis of the n1 scanning mirror 10.

When the recording medium 5 is held on the recording medium holding means 11 as described above, the light beam 2 is deflected by the rotating polygon mirror 3.
performs main scanning on the recording medium 5 in the direction of arrow B. The imaging lens 4 converges the light beam 2 onto a recording medium 5, and also deflects the light beam 2 deflected at a substantially constant angular velocity by the rotating polygon mirror 3 onto the recording medium 5 which is flat in the main scanning direction. This is a lens that allows you to scan at high speed. Further, the sub-scanning mirror 1
o is in the direction of arrow C, with the intersection of a plane containing the optical path of the light beam 2 that has passed through the imaging lens 4 or a plane parallel to the plane and a plane perpendicular to the optical axis of the imaging lens 4 as the rotation axis. It rotates at low speed, preferably on the opposite) J plane 1
The reflection position of the light beam 2 on 0a coincides with the rotation axis. Note that the rotation axis of the sub-scanning mirror 10 may be located at a position slightly shifted from the above-mentioned reflection position within a range that does not pose a problem in terms of scanning accuracy of the light beam 2, such as the center position in the thickness direction of the mirror.

This sub-scanning mirror 10 rotates in the direction of the arrow C by a predetermined angle sufficient for the light beam to scan the entire surface of the recording medium while recording image information on one recording medium. By rotating this sub-scanning mirror 10,
The main scanning line formed by the light beam 2 on the recording medium 5 is gradually moved in the direction of arrow 1 to perform sub-scanning.

Therefore, the light beam 2 is focused to two-dimensionally scan the entire surface of the recording medium by the rotating polygon mirror 3 and the sub-scanning mirror 10.

As described above, when the sub-scanning mirror 10 rotates by a predetermined angle at a predetermined speed and the necessary image information is recorded over the entire surface of the recording medium, the sub-scanning mirror 10 rotates in the rotation direction. The recording medium 5 is rotated in the opposite direction, or further rotated in the rotational direction to complete one rotation, and then returned to the first position J, in preparation for recording on the next recording medium 5. In addition, in this embodiment M, as shown in FIG. The sub-scanning mirror 10 is rotated from the initial position in the direction of arrow C to direct the light beam to #i of the recording medium 5.
It is detected that the i-section has been reached, and at this point the optical modulator 6 is operated based on the image signal to perform nine adjustments of the light beam 2 and start recording an image on the recording medium 5.

As described above, in the apparatus of the present invention, sub-scanning is performed by fixing the recording medium 5 and rotating the sub-scanning mirror 10 to move the light beam 2. Therefore, when moving the recording medium side, The size of the device in the J-scanning direction can be reduced to about half compared to the conventional method. Further, even when the sub-scanning mirror 10 is made long and extends in the main scanning direction as in the above embodiment, the length of the sub-scanning mirror 10 in the main scanning direction is determined by the incident Q of the light beam. =1
It is sufficient that the length is sufficient to allow the recording medium to hold the recording medium, and it is sufficient that the length is shorter than the length of the main scanning line on the recording medium. 11 in the main scanning direction, and the apparatus of the present invention is also compact in the main scanning direction. Note that the sub-scanning mirror 10 does not necessarily have to be long if it can be placed sufficiently close to the main-scanning optical deflector, and its shape can also be rotated around the above-mentioned rotation 1FII@. It may have any shape as long as it moves and allows the light beam 2 to be incident without fail.

Further, the motor 9 that drives the sub-scanning mirror 10 is 1
1 Since no load fluctuations occur, the control is easy and a relatively inexpensive motor can be used.Roughly, the recording medium 5 held by the sheet holding means 11 is Since it is possible to record on the entire surface of the recording medium by irradiating the light beam to the rear end, it is also possible to make both ends of the recording medium black.

Note that depending on the type of recording body, the recording body 5 may be the recording body holding means 1.
If the recording medium does not fit well with the holding surface 11a of the holding surface 11a and it is preferable to maintain it in an arcuate shape, a suction means may be provided in the recording medium holding means 11 to suck the recording medium onto the holding surface 11a.

In addition, in the apparatus of the present invention, C is provided with the sub-scanning mirror 10 that makes the entire incident V of the light beam 2 deflected by the main-scanning optical deflector 3 as described above, so that the optical path of the light beam 2 is changed. There is no need to provide a relay lens for adjustment, the optical system becomes simpler, the device becomes more compact, and the l! Manufacturing costs can be reduced.

By the way, as mentioned above, in the device of this embodiment,
Since the recording medium 5 is held by the recording medium holding means 11 when recording is performed using the light beam 2, the recording medium 5
must be accurately positioned on the holding surface 11a of the recording medium holding means. Therefore, the above apparatus is equipped with a positioning means for positioning the recording body in the main scanning direction after the recording body is carried onto the holding surface. An example of the means and the loading and unloading of the recording medium 5 into the recording medium holding means 11 will be explained.

Near one end of the recording medium holding means 11, a pair of carry-in rollers 13Δ and 13B, which are means for carrying the recording medium 5, are provided. These carry-in rollers 13Δ, 13B are used to suck and feed a plurality of recording bodies one by one from a magazine 14 in which a plurality of recording bodies are stored, as shown in FIG. Thereafter, the recording medium 5 falling guided by the guide plate 15 is grasped and rotated in the direction of the arrow to carry the recording medium 5 onto the holding surface +1al, :ji-)τ.

The carry-in rollers 13A and 13B feed the recording medium 5 in the direction of arrow F1 by their rotation, and move the recording medium 5 to a predetermined position on the holding surface 11a where the recording medium 5 is to be held, as shown in FIG. 2(b). Transport it to the front.

The recording medium 5, which has been brought to a predetermined position and transported in this manner, is moved to a rotation shaft 18 which is provided near one end of the recording medium holding means 11 and is rotationally driven by a monitor 17, as shown in FIG.
A moving groove 1 formed in the recording medium holding means 11
It is moved to a predetermined position by a recording body delivery plate 19 that is movable within 1b.

In other words, as shown in FIG. 2(a), the carry-in roller 13
When the recording medium 5 is carried onto the holding surface 11a by Δ, 13B, the recording medium delivery plate 19 is in a retracted position from above the holding surface 11a, but the carrying-in rollers 13Δ, 13
When the recording medium is carried in front of the predetermined position on the holding surface 11a by B, it rotates in the direction of arrow E1 and moves to a position where it can come into contact with the rear end of the recording body, as shown in FIG. 2(b). . Next, as shown in FIG. 2(C), the recorder feed-out plate 19 further moves a in the direction of arrow E2, pushing the rear end of the recorder 5, and moves the recorder to a predetermined position in the direction of arrow E2. let

The recording medium holding means 11 has 8
．． A detector 2° such as a non-conforming photointerrupter or a limit switch is provided at the portion where the leading end of the recording medium 5 is located, and this detector 20 is connected to the recording medium sending plate 1! The leading edge of the recording medium 5 pushed by J and reaching a predetermined position is detected and a detection signal is generated. This detection signal is transmitted to the drive member of the recording medium sending-out plate 19, and the rotation of the recording medium sending-out plate 19 in the direction of arrow E2 is stopped to position the recording medium in the sub-scanning direction.

Furthermore, a guide plate 22 that projects upward is provided at one end of the recording medium holding means 11, as shown in FIG.
Below the holding surface 11a, for example, two width adjustment rollers 23 are provided which bring the recording medium into contact with the guide plate 22 and position the recording medium in the main scanning direction. This width adjusting roller 23 is connected to an opening 24 provided in the holding surface 11a.
is exposed to the holding surface and is movable up and down so that it can assume a first position where the upper end is on the holding surface and a second position where the upper end is retreated from the holding surface, and in the first position The recording body is moved by coming into contact with the lower surface of the recording body 5. That is, the recording medium 5 is the carry-in roller 13A.

13B onto the holding surface 11a, and until the recording medium 5 is positioned in the sub-scanning direction by the recording medium delivery plate 19, the width adjusting roller 23 is moved in the direction shown in FIGS. 2(a) to (C).
) is in the second position as shown in FIG.
When the positioning in the sub-scanning direction is completed, the image shown in Fig. 2(d)
As shown in FIG. 2, it moves upward and reaches the first position. FIG. 3 shows a plan view of the recording medium holding means 11 in a state in which the width adjusting roller 23 is at the first position (4).

FIG. 3 (a> shows the state before the width adjustment roller 23 is driven at the first position, and the recording body 5 is at f
It is positioned only in the VI scanning direction.

Subsequently, as shown in FIG. 3(b), when the width unevenness roller 23 rotates in the direction of arrow G, the recording medium 5 is moved in the direction of the guide plate 22, and the side edge of the recording medium 5 is moved toward the guide plate 22.
By coming into contact with the recording medium, the recording medium is positioned in the main scanning direction.

J5, the number, length, position, etc. of the width adjustment rollers 23 are not limited to those shown in this embodiment, and can be arbitrarily set depending on the type of recording medium. In addition to the shape shown in FIG. 1, the guide plate 22 may have a small height along one side edge of the recording medium holding means 11 as shown in FIG. 4(a). Figure 4 (
As shown in b), a plurality of temporary paying members may be provided discontinuously.

When the positioning of the recording medium 5 in the main scanning direction and the sub-scanning direction is completed as described above, as shown in FIG. 2(e),
The recording medium delivery plate 19 retreats slightly in the direction of arrow E3, and the width adjusting roller 23 descends again to the second position, and in this state two-dimensional scanning by the light beam 2 is performed.

When the recording by the light beam 2 is completed, the recording medium sending out base 19 rotates in the direction of arrow E4 as shown in FIG. Move it to the other end. Near the other end of the recording medium holding means 11, there is a pair of carry-out rollers 21 serving as a means for carrying out the recording body.
△, 21B is installed, and the recording medium feeding plate 19
is this carry-out roller 21A.

The rear end of the recording medium 5 is pushed and moved until the leading end of the recording medium 5 is gripped by 2'+3. The recording medium 5 gripped by the carry-out rollers 21A and 213 in this manner is moved in the direction of arrow F3 by the rotation of the carry-out rollers 21A and 21B, and is carried out to the outside of the recording apparatus. The recording medium 5 is carried into, for example, an automatic developing machine or a receiving magazine, and the delivery rollers 21A and 213 may be similar to the entrance rollers of the automatic developing machine. When the recording medium 5 is carried out of the apparatus, the recording body feeding plate 19 rotates in the direction of the arrow E5, which is the opposite direction to the direction of the arrow E4, so as to allow the new recording medium 5 to be carried in (Fig. 2). a)
Return to the position shown in . Note that the position where the detector 2G is provided is not limited to the above position, but is, for example, located at a predetermined position in the recording body holding means 11 where the recording body 5 is held, and at the rear end of the recording body 5. A detector is provided at the part where is located, and the rear end of the lζ recording body is detected at a predetermined position 11;
You can also stir it.

Further, when the recording body 5 is stopped at a predetermined position, the detector 20 is not necessarily required for positioning the recording body 5 when the positioning accuracy is not very high.
f: The operating time of the motor 17 that drives one L plate may be determined appropriately so that the recorder feed-out plate 19 is stopped at a position where the recorder 5 is moved to a predetermined position. In this case, if a pulse motor is used as the motor 17, control can be easily performed.

Further, the positioning of the recording medium 5 in the sub-scanning direction on the holding surface 11a at a3 can also be performed using a portion l other than the aforementioned recording medium delivery plate 19. For example, as shown in FIG. 5, a first position extends below the holding surface 11a in the main scanning direction and has an upper end on the holding surface 11a, and a first position where the upper end is on the holding surface 11a.
A recording body feeding roller 25 may be provided, and the recording body may be positioned by this feeding roller 25. Positioning of the recording body 5 using this recording body feeding roller 25 This will be briefly explained with reference to FIG.

As shown in FIG. 6<a>, the recording medium feed row 525 is retracted to the second position 7. when the recording medium 5 is carried in by the carrying rollers 1:3A, 13[3]. J], and when the conveyance is completed, it rises to the first position and comes into contact with the recording medium 5, as shown in FIG. 6(b). At this first position, the recording medium feed roller 25 rotates in the direction of arrow 11 as shown in FIG. 6(C), and moves the recording medium 5 in the direction of arrow F2. When the recording medium 5 reaches a predetermined position in the sub-scanning direction, the detector 20 detects the leading edge of the recording medium 5 and issues a detection signal, and upon receiving this detection signal, the recording medium feed row 525 stops rotating. Recording (A 5 is stopped at a predetermined position. When the positioning of the recording medium 5 in the sub-scanning direction is completed in this way, the recording medium feed roller 25 is moved to the second position as shown in FIG. 6(d'). The width adjusting roller 23, which had been in the second position, turns to the first position and rotates in the direction of arrow G, and the recording is performed by this width adjusting roller and the temporary guide 22. The body 5 is positioned in the main scanning direction. When this positioning in the main scanning direction is completed, the width roller 25 retreats to the second position as shown in FIG. 6(e), and the light beam 2 When the recording by the light beam 2 is completed, the recording medium feed roller 25 is raised to the first position again and rotated, as shown in FIG. direction, the leading end is gripped by the carry-out rollers 21A and 21B, and the recording body 5 is conveyed.In order to carry out the recording body 5, the recording body feed roller 25 is rotated in the opposite direction, and the recording body 5 is conveyed out. 5 to the carry-in rollers 13Δ, 13B side, the recording body 5 may be carried in by being gripped by the rollers 13A, 13B, and the carry-in rollers 13A, 13B may be reversed and used as carry-out rollers. .

The light beam scanning device of the present invention has been described above by taking the light beam recording device as an example.
``IJli line image information recording and reproducing system using stimulable phosphor C1~, which has already been proposed by the applicant, No. 1984-12429 and No. 56-11395.

It can also be applied to various light beam reading devices such as radiation image information reading devices used in Japanese Patent No. 50-11397, etc.
In this case, the scanning sheet is read in conjunction with the rotation of the sub-scanning Jlj mirror 10 so that the melon faces the scanning line. Just move it.

(Effects of the Invention) As described above in detail, the light beam travel I!
According to the F device, by fixing the scanning sheet and performing sub-scanning, the entire device can be downsized, especially in the sub-scanning direction. Furthermore, by performing sub-scanning with a sub-scanning mirror and by making the scanning sheet arc-shaped, the optical system inside the device can be simplified, making it possible to further downsize the entire device. Become. In addition, it is possible to reduce the number of optical elements used, eliminate the need for expensive optical elements, and reduce the cost of sub-scanning motors.
'; Since it can be made into a variety of materials, the manufacturing cost of the device can be greatly reduced.

In general, the apparatus of the present invention is equipped with a positioning means consisting of a guide plate and a width adjusting roller, so that the scanning sheet can be positioned on the holding surface in the main scanning direction, and the scanning sheet can be held and held. It becomes possible to reliably position it at a predetermined position on the surface.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an outline of a light beam recording device according to one embodiment of the present invention, and FIGS. 2(a) to (f) show loading of a recording medium into the device,
FIGS. 3(a) and 3(b) are schematic diagrams illustrating the positioning of the recording medium in the main scanning direction in the above apparatus, and FIGS.
b) is a perspective view showing an actual fs mode of the guide plate used in the present invention; FIG. 5 is a plan view showing a recording medium holding means provided with a recording medium feeding roller; FIGS. 1 is a schematic diagram illustrating the positioning of a recording medium by a recording body feed roller, and FIGS. 7 and 8 are perspective views showing the general structure of a conventional light beam scanning device. 1. Beam light source 2.・Light beam 3...
Rotating polygon mirror 4...Imaging lens 5...Recording body 10...Sub-scanning mirror 11...Recording body holding means 22...Idle plate 23...Width adjustment roller Fig. 3

Claims (1)

[Claims] A light beam emitted from a beam source is caused to scan a scanning sheet in a main scanning direction, and the light beam and the scanning sheet are relatively moved in a sub-scanning direction substantially orthogonal to the main scanning direction. In the light beam recording device that moves the light beam to two-dimensionally scan the light beam on the scanning sheet, a main scanning device is provided on the optical path of the light beam emitted from the beam source and deflects the light beam. an optical deflector; an imaging lens provided on the optical path of the light beam deflected by the main scanning optical deflector; A mirror that reflects a light beam that has passed through the imaging lens, and is rotated approximately at the intersection of a plane that includes the optical path of the light beam that has passed through the imaging lens, or a plane that is parallel to the plane, and a plane that is perpendicular to the optical axis of the imaging lens. A sub-scanning mirror that rotates as a shaft, and a scanning sheet holding means that holds the scanning sheet in an arcuate shape having a central axis that substantially coincides with the rotational axis of the sub-scanning mirror, the scanning sheet holding means a guide plate protruding upwardly provided at one side end and a first position below the sheet holding surface of the scanning sheet holding means, the upper end of which is on the holding surface;
It is movably provided so as to be able to assume a second position of retreating from the holding surface, and moves the scanning sheet on the holding surface in the first position toward one end of the scanning sheet holding means. A light beam scanning device comprising a width adjusting roller that can be brought into contact with the guide plate.