JPS6258771A - Optical beam scanner - Google Patents

Abstract

PURPOSE:To simplify the optical system in the titled scanner and to attain miniaturization by fixing a scanning sheet to apply the sub scanning by a sub scanning mirror and forming the scanning sheet in a circular-arc form. CONSTITUTION:A light beam 2 deflected by a rotary polygon mirror 3 transmits through an image forming lens 4 such as an ftheta lens provided on the optical path, is made incident on a reflection face 10a of a long sub scanning mirror 10 prolonged in the main scanning direction and reflected. A sheet recording medium 5 is supported in a circular-arc face by a recording medium support means 11 having a circular-arc form support face 11a. The light beam 2 deflected by the rotary polygon mirror 3 applies main scanning the recording medium 5 in the direction of arrow B. Since the recording medium is fixed and the sub scanning is executed by moving the light beam while the sub scanning mirror 10 is driven in this way, it is not required to provide a relay lens adjusting the optical beam 2. Thus, the optical system is simplified, the scanner is made more compact and the manufacture cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a light beam scanning device that scans a light beam using an optical deflector. The present invention relates to a scanning device.

<Technical Background and Prior Art of the Invention> Conventionally, light beam scanning devices that deflect a light beam using an optical deflector and scan a scanning sheet relatively two-dimensionally have been used in various types of scanning recording scanning and scanning reading devices. It is widely used in etc. Two-dimensional scanning of the light beam in these light beam scanning devices involves deflecting the light beam with an optical deflector to cause it to main scan the scanning sheet, and also moving the light beam and the scanning sheet relative to each other in the main scanning direction. This is performed by moving in the IWJ scanning direction substantially orthogonal to the IWJ scanning direction. However, in the conventional apparatus, various problems have arisen, such as the apparatus becoming larger due to the means for performing the above-mentioned a-scanning, and the optical system becoming complicated and expensive. Hereinafter, problems with the conventional light beam scanning device will be explained with reference to FIGS. 4 and 5.

In the light beam scanning device shown in FIG.
The light beam 102 emitted from 01 is incident on a rotating polygon mirror 103, which is an optical deflector, and as the polygon mirror rotates in the direction of the arrow, the light beam 102 is deflected in the direction of the arrow! )is directed.

The light beam reflected by the rotating polygon mirror 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 is held between a rotating drum 106 rotating in the direction of arrow C and a pair of rollers 107A and 107B provided on the rotating drum, and is rotated in the main scanning direction as the rotating drum 106 rotates. Q-scanning is performed by being conveyed in a substantially perpendicular direction indicated by the arrow. Therefore, the light beam 102 is thus conveyed in the direction of the arrow <1?1 (scanned) on the scanning sheet 10
The scanning sheet 105 is two-dimensionally scanned by repeatedly main scanning the scanning sheet 105 in the direction of arrow B.

However, in the above-mentioned apparatus, sub-scanning is performed by moving the scanning sheet, but in order to suppress load fluctuations to the motor 108 during sub-scanning as much as possible and to prevent uneven sub-scanning from occurring, the Thus, it is necessary to provide a space in which one scanning sheet can be placed, by placing support stands 109 and 110 for supporting the scanning sheet 105 before and after the scanning position by the light beam.

Therefore, in the above device, a space having a length of at least two scanning sheets in the n1 scanning direction is required.
There is a problem that the entire device becomes larger. Further, the rotating drum 106 that conveys the scanning sheet has a width larger than the width of the scanning sheet in order to stably convey the scanning sheet.
Since a motor 108 for rotating the drum is further provided in the width direction of the rotating drum, the above-mentioned device becomes large in the main scanning direction as well.

Furthermore, in order to carry out high-precision scanning on the scanning sheet while conveying the scanning sheet, the motor must be strictly controlled (by the company) so that the scanning sheet can be conveyed with high precision in the correct direction at a constant speed. ), and since a high-precision motor that can perform the above control is expensive, there is also the problem that the cost of the entire 8-position system increases significantly. In addition, in order to stably convey the scanning sheet, the roller 107A is
, 107B are essential, but because of the provision of these rollers, it is not possible to scan both sides of the scanning sheet in the 01 scanning direction.For example, when the device is a light beam recording device, We cannot meet the request for black edges on both ends.

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. 4 are given the same numbers and their explanations will be omitted.

The apparatus shown in FIG. 5 includes a light beam 102 which rotates in the direction of the arrow. 8 deflection and perform main scanning on the scanning sheet 111 in the direction of the arrow B. The main scanning line rotates at a low speed in the direction of the arrow C, and the main scanning line scans the scanning sheet 111 fixed at a predetermined position. Reverse the light beam to move in the opposite direction! A sub-scanning galvanometer mirror 112 facing lFl@ is provided. That is,
The sub-scanning galvanometer mirror 112 rotates once in the direction of arrow C, which is a direction substantially perpendicular to the main scanning direction of the light beam, at a low speed while scanning one scanning sheet. The light beam 102 is transmitted to the rotating polygon &!
103 and the Fl scanning galvanometer mirror 112, the entire surface of the scanning sheet 111 is 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.

Also, between the DJ scanning galvanometer mirror 112 and the scanning sheet 111, there is an fθ lens 11 which is an imaging lens.
3 is provided, and this fθ lens is connected to a rotating polygon mirror 10.
3 and a sub-scanning galvanometer mirror 112 at a constant angular velocity, the light beam is linearly scanned at a constant velocity on a flat scanning sheet surface.

By the way, in the above-mentioned apparatus, in order to make the light beam deflected by the rotating polygon mirror 1o3 and take a spread optical path enter the reflecting surface of the relatively small sub-scanning galvanometer mirror, the optical path of the light beam is once focused; A relay lens 114 is provided that adjusts the optical path of the light beam so that the light beam passes through the convergence position and spreads again by reproducing the deflection by the rotating polygon mirror. The sub-scanning galvanometer mirror is arranged at a position where the optical path of the light beam is focused by the relay lens 114, and the light beam is focused by the relay lens 11.
4, all of the beams are made incident on the sub-scanning galvanometer mirror and deflected. After being reflected and deflected by the sub-scanning galvanometer mirror, the light beam is directed to the rotating polygon fi
Since the optical path is widened again at an angle corresponding to the deflection of 103,
Main scanning lines of the required length can be obtained on the scanning sheet 111.

However, since the apparatus shown in FIG. 5 is provided with the relay lens 114 in addition to the imaging lens 113 as described above, 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. It is an object of the present invention to provide a light beam scanning device which can eliminate the above problems, and further reduce the size of the entire device and reduce manufacturing costs by performing scanning without using a complicated optical system equipped with expensive optical elements. This is the purpose.

(Structure of the Invention) A light beam scanning device of the present invention includes: a main scanning optical deflector that is provided on an 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 deflected light beam; a mirror provided on the optical path of the light beam passing through the imaging lens to reflect the light beam with a reflective surface; a sub-scanning mirror that rotates about a rotation axis approximately about the intersection of a plane containing the optical path of the light beam that has passed through the imaging lens or a plane parallel to the plane and a plane perpendicular to the optical axis of the imaging lens; A first feature of the present invention is that it includes a scanning sheet holding means that holds the scanning sheet in an arcuate shape having a central axis that substantially coincides with the drive axis of the sub-scanning mirror.

That is, in the light beam recording device of the present invention, since the recording medium is fixed by the recording medium holding means, it is not necessary to use a large device in the sub-scanning direction, as in the case where the recording medium is conveyed to perform sub-scanning. There is no need to do this, and the entire device can be made more compact. In addition, the light beam reflected by the main scanning optical deflector passes through the main scanning imaging lens and is directly reflected by the sub scanning mirror for sub scanning, so there is no need to repeat the relay lens etc. The optical system becomes simple and inexpensive. 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 due to the design of the optical system, it must be a long mirror that extends in the main scanning direction. preferable.

By the way, as mentioned above, in the apparatus of the present invention, the scanning sheet is held in an arcuate shape by the scanning sheet holding means, so the scanning sheet can be reliably carried into this arcuate holding position and the scanning sheet can be accurately positioned. However, it is necessary to reliably transport the scanning sheet from the holding position. Therefore, the device of the present invention is installed near one end of the scanning sheet 1 to the holding means ().
a carrying means for carrying the scanning sheet to a position in front of a predetermined position on the scanning sheet holding means, a sheet carrying out means provided near the other end of the scanning sheet holding means, and a scanning sheet holding means of the scanning sheet holding means. It extends below the surface in the main scanning direction and is movably provided so that the supernatant can take a first position on the holding surface and a second position where it retreats from the holding surface, and the first At the position, the scanning sheet carried in is moved toward the predetermined position, and the scanning sheet at the predetermined position is moved to a position where the leading edge of the scanning sheet is gripped by the carrying out means. The second feature is that it includes a scanning sheet feeding roller.

(Embodiment) Hereinafter, an embodiment of the present invention will be explained 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.

A light beam 2 emitted from a laser light source 1 enters a modulator 6 which is modulated by a modulator drive circuit 7 based on a signal emitted from an image signal output circuit 8 that outputs an image signal, and then is modulated. The light is incident on the rotating polygon lt3, which is a main scanning optical deflector rotating in the direction of the arrow, and is deflected. As the laser light [1], in addition to a He-Ne laser, an Ar laser, etc., a laser light source formed by a combination of a semiconductor laser and a beam shaping optical system, etc. are used. In addition, when using a laser light source that can be directly modulated, such as a semiconductor laser, the modulator 6 is not particularly installed in the optical path of the light beam 2, and the laser light source is directly modulated by V11it L. You can also do this. 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 (AOD) may be used as the main scanning optical deflector.

The light beam deflected by the rotating polygon mirror 3 passes through an imaging lens 4 such as an fθ 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. Long sub-scanning reflective mirror 1 extending in the scanning direction
0 and is reflected by the reflective surface 10a. Further, below the sub-scanning mirror 1o, on the optical path of the light beam reflected by the sub-scanning mirror, a sheet 1-shaped recording medium 5 such as a photographic film or photographic paper is placed on an arc-shaped holding surface. It is held in an arcuate shape by a recording medium holding means 11 having a diameter of 11a. This holding means 11 can be used, for example, to bend a plate-shaped object,
It is formed by integral molding 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 sub-scanning mirror 1°.

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 deflects the light beam 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, at a substantially constant velocity. This is a lens that allows scanning. Further, the sub-scanning mirror 1o
is lowered in the direction of arrow C with the intersection of a plane containing the optical path of the light beam passing 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 a high speed, and desirably, the reflection position of the light beam 2 on the reflection surface 10a and the rotation axis coincide with each other. Note that the rotation axis of the sub-scanning mirror may be at a position J5 within a range that does not cause a problem in terms of scanning accuracy of the light beam, such as the center position of the mirror in the thickness direction, and a position slightly shifted from the above-mentioned reflection position.

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 the rotation of this sub-scanning mirror, the main scanning line formed by the light beam 2 on the recording medium 5 is gradually moved in the direction of the arrow, thereby performing sub-scanning. Therefore, the light beam 2 is transmitted to the rotating polygon vL3 and the sub-scanning mirror 10.
This allows the entire surface of the recording medium to be scanned two-dimensionally.

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 is rotated in the opposite direction, or further rotated in the rotational direction to complete one rotation, and returned to the initial position in preparation for recording on the next recording medium. In this embodiment, as shown in FIG. 1, a photodetector 12 is mounted on the recording medium holding means 11, and the photodetector 12 detects a light beam to determine the image recording scanning start position. It has become. That is, by rotating the sub-scanning mirror 10 from the initial position 11 in the direction of arrow C, it is detected that the light beam has reached the end of the recording medium 5, and at this point, the light modulator 6 is activated based on the image signal. It operates to modulate 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 and moving the light beam by rotating the sub-scanning mirror 10, so compared to the case where the recording medium is moved. , the size of the device in the sub-scanning direction can be reduced to about half. Further, even in the case where the sub-scanning mirror 10 is a long one extending in the main scanning direction as in the actual M mode, the length of the sub-scanning mirror 10 in the main scanning direction is 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. It is quite possible to make the length shorter than the length in the main scanning direction of
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 axis. It may have any shape as long as it moves and allows the light beam 2 to be incident without exception. Furthermore, since the motor 9 that drives the sub-scanning mirror 10 does not undergo load fluctuations, it is easy to control, and a relatively inexpensive motor can be used. Furthermore, since the recording medium 5 held by the sheet holding means 11 can be irradiated with a light beam from the front end to the rear end in the sub-scanning direction to perform recording on the entire surface of the recording medium, both ends of the recording medium can be printed with a black edge. It is also possible to make it black. Depending on the type of recording medium,
If the recording medium 5 does not fit well on the holding surface 11a of the recording medium holding means 11 and it is difficult to maintain it in an arcuate shape,
A suction means may be provided in the recording medium holding means 11 to suction the recording medium onto the holding surface 11a.

Furthermore, in the apparatus of the present invention, as described above, the sub-scanning mirror 10 is provided which allows all of the light beam 2 deflected by the main-scanning optical deflector 3 to enter, so that the optical path of the light beam 2 is adjusted. Since there is no need to provide a relay lens or the like, the optical system is simplified, the device becomes more compact, and the manufacturing cost can be reduced.

By the way, as described above, in the apparatus of this embodiment, the recording medium 5 is held in a circular arc shape at a predetermined position on the holding surface 11a by the recording medium holding means 11. Therefore, prior to scanning with the light beam, the recording medium 5 is reliably carried along the arc-shaped holding surface, and is accurately positioned at a predetermined position on the holding surface. It must be carried out reliably along the surface. Therefore, the above-mentioned apparatus is provided with a recording medium carrying-in means, a carrying-out means, and a positioning means.Hereinafter, each of the above-mentioned means will be explained with reference to FIGS. 1, 2, and 3.

A pair of carry-in rollers 13A and 13B are provided near one end of the recording medium holding means 11 as a means for carrying the recording medium. These carry-in rollers 13A and 13B are used to pick up one sheet from a magazine 14 in which a plurality of recording bodies 5 are housed by a suction means 1G, as shown in FIG.
After being sucked and separated one by one, the falling recording medium 5 guided by the guide plate 15 is gripped, rotated in the direction of the arrow, and carried in along the holding surface 11a.

The carry-in rollers 13A, 13B move the recording medium in the direction of arrow F! by their rotation. Force direction feeding: As shown in FIG. 3(b), the recording medium 5 is conveyed to the front of the predetermined position on the holding surface 11a where the recording medium 5 is to be held.

The recording medium 5 that has been carried to the front of the predetermined position in this way is
As shown in FIG. 2, which is a plan view of the recording medium holding means 11, an opening 18 is provided extending in the main scanning direction below the holding surface 11a of the recording medium holding means 11, and is stepped within the holding surface 11a. a recording body which is located within the storage surface and is exposed to the holding surface and is movable between a first position where the upper end is on the holding surface and a second position where it is retreated from the holding surface; It is moved to a predetermined position by a feed roller 17.

That is, as shown in FIG. 3(a), the carry-in roller 13
When the recording medium 5 is carried onto the holding surface 11a by the carrying rollers 13A and 13B, the upper end of the recording medium feeding roller 17 is at the second position retracted from the holding surface 11a. When the body is carried in front of the predetermined position on the holding surface 11a, it moves upward as shown in FIG. 3(b), moves to the first position, and comes into contact with the lower surface of the recording body. In this first position, the recording medium feed roller 17 rotates in the direction of arrow E, as shown in FIG. 3(C), and moves the recording medium 5 to a predetermined position in the direction of arrow F2.

Note that the roller 17 is not configured to contact the entire width of the recording medium 5, but may be configured to contact only both ends or the center portion.

The recording medium holding means 11 includes a reflective photointerrupter and a limiter, which are exposed in the holding surface 11a through an opening 19, as shown in FIG. Detector 20 such as a switch
The detector 20 detects the leading edge of the recording medium that has reached a predetermined position by the recording medium feed roller 17 and issues a detection signal.

This detection signal is transmitted to the driving member (not shown) of the recording medium feed roller 17, and stops the rotation of the recording medium feeding roller.When the recording medium 5 is placed at a predetermined position on the holding surface 11a in this way, As shown in FIG. 3(d), the recording medium feed roller 17 is lowered and retreated to the second position, and in this state, two-dimensional scanning by the light beam is performed.

When the recording by the light beam is completed, the recording medium feed roller 17 moves upward again to the first position, rotates in the direction of arrow E, and moves the recording medium 5 as shown in FIG. 3(e).
is moved to the other end side of the recording medium holding means 11. The recording medium holding means 11 is moved to the other end side. Recording body holding means 11
Near the other end, a pair of carry-out rollers 21A and 21BIfi, which serve as means for carrying out the record body, are provided, and the record body feed reeler 17 moves the record body until the leading edge of the record body is gripped by the carry-out rollers 21A and 21B. Move u. The recording medium 5 gripped by the carry-out rollers 521A and 21B in this manner is moved in the force direction of arrow F by the rotation of the carry-out rollers, and is carried out to the outside of the recording apparatus. Note that the recording medium discharged from the apparatus is carried into, for example, an automatic developing machine or a receiving magazine, and the unloading roller may also serve as an entrance roller of the automatic developing machine or the like.

When the recording medium is carried out of the apparatus in this manner, the recording medium feed roller 17 descends and returns to the second position, allowing the introduction of a new recording medium. Note that the position where the detector 20 is provided is not limited to the above-mentioned position,
For example, a detector may be provided at a portion of the record holding means where the rear end of the record is located at a predetermined position where the record is held, and the rear end of the record placed at the predetermined position may be detected. good.

Further, in the case where the recording body 5 is stopped and positioned at a predetermined position, the detector 20 is not necessarily used when positioning accuracy is not so required. The operation time may be determined appropriately so that the recorder feed row 517 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, control can be easily performed.

As mentioned above, in the device of this embodiment, the carry-in roller,
By providing a W1 output roller, a detector for detecting the position of the leading edge of the recording medium, and a recording body feed roller for moving the recording medium as described above, loading, unloading, and positioning of the recording medium are ensured. can be done.

As shown in Figure WS1, when the recording medium is placed at a predetermined recording position, the recording medium is rotated in the direction of the arrow on the guide plate 22 provided at the side end of the recording medium holding means 11. By providing the pressing plate 23, the positioning of the recording medium in the main scanning direction can be performed with high precision.

The light beam scanning device of the present invention has been described above using a light beam recording device as an example. Information recording and reproducing system (Unexamined Japanese Patent Publication No. 55-1
No. 2429, No. 5G-11395.

It can also be applied to various light beam reading devices such as the radiation image information reading device used in Japanese Patent No. 56-11397, etc.), and the above-mentioned effects can be achieved in the same way in light beam reading devices. In this case, the reading means may be moved on the scanning sheet so as to face the scanning line in conjunction with the rotation of the sub-scanning mirror.

(Effects of the Invention) As described above in detail, according to the light beam scanning device of the present invention, by performing sub-scanning with the scanning sheet fixed, the entire device can be downsized, especially in the sub-scanning direction. can. Furthermore, by performing sub-scanning with a sub-scanning mirror and making the scanning sheet arc-shaped, the optical system inside the device can be simplified, making it possible to further downsize the entire device. . Furthermore, the number of optical elements used can be reduced, the need for expensive optical elements can be eliminated, and the sub-scanning motor can be made inexpensive, so the manufacturing cost of the apparatus can be significantly reduced.

Furthermore, the scanning sheet is carried in and carried out by the carrying-in means and the carrying-out means, and the scanning sheet is positioned by the scanning sheet feeding roller, so that the carrying-in/unloading of the scanning sheet onto the arcuate holding surface, and the carrying-out/unloading are carried out. can be done reliably.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an overview of a light beam recording device according to an embodiment of the present invention, FIG. 2 is a dimensional plan view of a recording medium holding means of the device, and FIGS. 3(a) to 3(e) are FIG. 1 is a schematic diagram illustrating loading, unloading, and positioning of a recording medium into the apparatus shown in FIG. 1, and FIGS. 4 and 5 are perspective views showing essential parts 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 13A, 13B... Carrying roller 17... Recording body feeding roller 20. ··Detector

Claims (1)

[Scope of Claims] 1) A light beam emitted from a beam light source is caused to scan a scanning sheet in a main scanning direction, and the light beam and the scanning sheet are moved relatively to each other in a sub-scanning direction substantially orthogonal to the main scanning direction. In a light beam scanning device that is moved in a scanning direction to two-dimensionally scan the light beam on the scanning sheet, a main unit that is provided on the optical path of the light beam emitted from the beam source and that deflects the light beam is provided. a scanning 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, and the intersection line 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 rotation axis, and a scanning sheet holding means that holds the scanning sheet in an arcuate shape having a central axis that substantially coincides with the rotation axis of the sub-scanning mirror, the scanning sheet a carry-in means provided near one end of the holding means for carrying the scanning sheet to a position in front of a predetermined position on the scanning sheet holding means; a sheet carrying-out means provided near the other end of the scanning sheet holding means; The sheet holding means extends in the main scanning direction below the scanning sheet holding surface, and is movable so that its upper end can take a first position on the holding surface and a second position where it retreats from the holding surface. and moving the loaded scanning sheet toward the predetermined position at the first position, and moving the scanning sheet at the predetermined position to a position where the leading end of the scanning sheet is gripped by the carrying out means. A light beam scanning device comprising a movable scanning sheet feeding roller.