JPS63261318A - Optical deflector unit - Google Patents

Abstract

PURPOSE:To facilitate adjusting operation and to make a device compact by providing a means for adjusting the position of an upper mount relevant to a lower mount. CONSTITUTION:An optical deflector unit 14 has an optical deflector for deflecting a light beam linearly and the mount member 34 consisting of the upper mount 36 which supports the optical deflector and the lower mount for fitting the deflector to a base. Then the means for adjusting the position of the upper mount 36 relevant to the lower mount 38 is provided. This position adjusting means consists preferably of a groove hole 48 formed in the upper mount 36, a screw 50 inserted into the groove hole 48, and a screw hole 54 formed in the lower mount 38. Consequently, adjustments are made outside the device by an optical system jig having the same arrangement with the device and the unit can be fitted to the base without any adjustment. Consequently, the assembly or replacement of the optical deflector to and in the device is facilitated and the device becomes compact.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field> The present invention relates to an optical deflector unit used in a light beam scanning device, and more particularly, the present invention relates to a light deflector unit used in a light beam scanning device, and more particularly, to a light beam scanning device that scans a scanned object two-dimensionally with a light beam, for example, a radiation image. When reading a stimulable phosphor sheet by irradiating excitation light onto a stimulable phosphor sheet that has been recorded, or by irradiating a light beam onto a photographic material to record an image on the photographic material, the light beam is one-dimensionally This invention relates to an optical deflector unit that deflects light.

<Prior art and its problems> As a method of obtaining a radiographic image as an image, a so-called radiographic system has traditionally been used, which uses a combination of a radiation thick film having an emulsion layer made of a silver salt photosensitive material and an intensifying screen. ing. Recently, a radiation image conversion system using a stimulable phosphor has attracted attention as an alternative to the radiographic system.

Here, stimulable phosphor refers to radiation (X-rays, α-rays, β-rays,
When irradiated with γ-rays, electron beams, ultraviolet rays, etc., part of the energy of this radiation is stored in the phosphor, and then
When the phosphor is irradiated with excitation light such as visible light, the phosphor emits stimulated light according to the volume of energy. A phosphor exhibiting such properties is called a stimulable phosphor.

Using this Zhl phosphor, radiation image information of a subject such as a human body is temporarily stored in a sheet having a layer of stimulable phosphor (hereinafter referred to as a ``stimulable phosphor sheet'' or simply ``phosphor sheet''). This sheet is scanned with excitation light to cause stimulated luminescence, the generated stimulated luminescence is read by an optical element and converted into an electrical signal to obtain an image signal, and this image signal is processed to obtain an appropriate diagnosis. Radiographic image information recording and reproducing systems for obtaining good radiographic images of subjects have been proposed (for example, Japanese Patent Laid-Open Nos. 55-12429 and 56-113).
No. 95, No. 55-163472, No. 56-10464
No. 5, No. 55-116340, etc.).

In addition, according to this system, after converting the radiation image information stored in the stimulable phosphor into an electrical signal, appropriate signal processing is performed, and this electrical signal is used for display on recording materials such as photographic light-sensitive materials, CRTs, etc. It is output as a visible image to the device, thereby obtaining a radiographic image with excellent suitability for observation and interpretation (diagnosis).

By the way, in such a radiation image recording and reproducing system, a stimulable phosphor is used in order to read image information from a stimulable phosphor sheet on which image information is accumulated or recorded, or to record the image information on a photographic light-sensitive material. An object to be scanned, such as a sheet or a photosensitive material, is two-dimensionally scanned by a light beam scanning device. In this light beam scanning device, at the same time as the object to be scanned is transported for sub-scanning, the light emitted from a light source such as a laser oscillator is deflected in one dimension using an optical deflector such as a galvanometer mirror. A scanning method is used in which the paper is scanned in a direction substantially perpendicular to the conveyance direction of the paper. When this light beam scanning device is applied to an image reading (reproducing) device, a laser beam is used as excitation light to irradiate a stimulable phosphor sheet and scan it, and the stimulated luminescence light is detected. Image information carried by the stimulable phosphor sheet can be read.

In addition, when this light beam scanning device is applied to an image recording device, the light beam is transmitted to an acousto-optic modulator (AOM), for example.
by scanning a recording medium containing a photographic material with a modulated light beam,
Image information can be recorded.

Such a light beam scanning device is required to have extremely high scanning accuracy (scanning position and scanning amount) both in reading and recording image information. Therefore, the drive control (rotational drive speed of 2 degrees and rotational drive angle) and positional tolerance of the optical deflector that one-dimensionally deflects the light beam must also have high precision. For this reason, parts that make up the optical system of the light beam scanning device, including the laser and optical deflector, are installed on a surface plate, and in order to improve the accuracy of the optical system, each surface plate in the reading device or recording device is Currently, slight adjustments have been made to the above.

For example, as shown in FIGS. 5a and 5b, the optical deflector 33 is fixed to the base 18 via a mount 100. This is light deflection P! When F33 is directly attached to the base 18, the mirror mount 42 is fixed to the rotating l181II40 of the galvanometer 33 with screws 44, and the rotating mirror 30 is fixed to the concave groove 46 at the upper end of the mirror mount 42 with adhesive. , so loosen the screw 44 and
This is because the mirror mount 42 must be rotated with respect to the rotation shaft 40 to adjust the displacement of the deflection point 30a of the rotation mirror 30, but the rotation radius is small and adjustment is extremely difficult.

The optical deflector 33 is fixed onto the center of the mount 100 with a screw, adhesive, or the like. mount 1
00 is a rectangular plate with four adjustment ports 102 on the periphery.
have.

The installation positions of the four adjustment ports 102 are on the circumference centered on the center of the rotating shaft 40. A screw 104 is inserted into the adjustment port 102 via a washer or the like, and the screw 104 is inserted into the base 18.
It is screwed into a screw hole 106 provided in the. At this time, since the adjustment port 102 is a so-called stupid hole that is larger than the shaft diameter of the screw 104, the fixed position of the mount 100 can be adjusted to the base 18 by the difference in diameter between the A adjustment port 102 and the screw 104. On the other hand, it is moved back and forth, left and right, or in the rotational direction.
In this way, the rotating shaft 40 of the galvanometer 32 is finely adjusted in the front, rear, left, right, or rotational direction to align the position, and the positional deviation of the deflection point 30a of the rotating mirror 30 is adjusted.

Certainly, compared to the adjustment using the mirror mount 42 described above, this method allows the mount 100 to be moved forward and backward, and the rotation radius is also larger, and the position of the deflection point 30a of the rotating mirror 30 is much closer to 8. The position must be adjusted after it is placed on the base of the optical beam scanning device, and the adjustment is very troublesome. This is especially inconvenient in the case of an optical system incorporating a tilt correction optical system, since the granularity of adjustment of positional deviation is strictly required.

Particularly when replacing parts, it is extremely difficult to make fine adjustments to the optical system in a device that incorporates various parts in addition to the optical system, and providing a space for fine adjustments will increase the size of the device. There are also problems, such as problems such as connections between the two, which in turn leads to an increase in costs.

<Object of the Invention> An object of the present invention is to solve the problems of the prior art described above, and to provide a light beam that two-dimensionally scans an object to be scanned, such as a stimulable phosphor sheet or a photographic light-sensitive material, by irradiating the light beam with the light beam. In the scanning device, the position adjustment of the optical deflector that deflects the light beam in a one-dimensional direction is performed outside the device described in 111 before fixing the light beam scanning device, for example, a radiation image reading device or a radiation image recording device to a base. , A-alignment can be performed using an optical system jig having the same arrangement as that of the device, and the mounting on the base can be performed without any adjustment, and the surface optical deflector can be easily assembled or replaced with the device;
It is an object of the present invention to provide an optical deflector unit that allows the device to be made compact.

<Detailed Description of the Invention> According to the present invention, there is provided an optical deflector unit used for two-dimensionally scanning an object to be scanned by irradiating it with a light beam. an optical deflector that deflects the optical beam in a one-dimensional direction, a mount member that includes an upper mount that supports the optical deflector, and a lower mount that attaches to the base; An optical deflector unit is provided, characterized in that it is provided with means for adjusting the position of the mount.

Preferably, the position adjusting means includes a slot formed in the upper mount, a screw inserted into the slot, and a screw hole provided in the lower mount.

<Specific Structure of the Invention> Next, an optical deflector unit according to the present invention will be described in detail with reference to a preferred embodiment shown in the accompanying drawings.

FIG. 1 is a perspective view conceptually showing a first embodiment in which an optical deflector unit according to the present invention is applied to a light beam scanning device used for reading.

The light beam scanning device 10 basically includes a laser light source section 12, an optical deflector unit 14, and a sub-scanning section (reading section) 16. The laser light source section 12 and the optical deflector unit 14 constitute an optical system. is placed on the surface plate 18.

The laser light source unit 12 is a laser light source 2 consisting of a laser oscillator.
0, a filter 24 that cuts unnecessary wavelength regions of the laser beam 22 emitted from the laser light source 20, a beam expander 26 that precisely adjusts the diameter of the laser beam 22, and an optical deflector unit that directs the laser beam 22. 14
It is composed of a mirror 28 etc. that directs the laser beam 22 toward
The optical system is constructed so as to precisely coincide with the deflection point 30a of the rotating mirror 30 constituting the optical deflector unit 14. These components are the laser light source 20, filter 24, beam expander 26, and mirror 2.
8 is placed on the surface plate 18 and fixed by various means so as not to cause deviation of the optical axis of the laser beam 22.

The optical deflector unit 14 of the present invention includes a rotating mirror 30, an optical deflector 33 having a galvanometer 32 for swinging the rotating mirror 30 by a predetermined angle, and a surface plate that supports the optical deflector 33 and serves as a base. A mount member 34 is provided for attachment to 18, and this mount member 34 has a two-layer structure of an upper mount 36 and a lower mount 38.

When the galvanometer 32 is not being driven, the rotating mirror 30 carried by the rotating shaft 40 of the galvanometer 32 either maintains a mechanical neutral position or swings to either side of the neutral position depending on the driving current. and directs the laser beam 22 to the deflection point 30.
The laser beams 22a to 22b are configured to be deflected in a one-dimensional direction by precisely adjusting the beam diameter with a scanning lens 70 centered at point a.

As shown in detail in FIGS. 2a and 2b, the galvanometer 32 of the optical deflector 33 is fixed to the surface plate 18, which is a base, via a mount member 34. A rotating shaft 40 protrudes upward from the center of the galvanometer 32 and rotates 5 times @4.
A cylindrical mirror mount 42 that fits thereon is fixed to the upper end of the mirror 0 by a screw 44 that passes through the side surface of the cylindrical column and reaches the rotation shaft 40. The mirror mount 42 has a concave groove 46 formed on its upper end surface to receive the lower part of the rotating mirror 30.

The lower portion of the rotating mirror 30 is adhesively bonded to the concave groove 46, thereby mechanically holding the rotating mirror 30 to the mirror mount 42. The galvanometer 32 of the optical deflector 33 is fixed to the upper mount 36 by a fixing means such as a screw or adhesive.

In the example shown in FIG. 2, the partial mount 36 is a rectangular plate, with the galvanometer 32 fixed at the center and adjustment slots 48 serving as adjustment means provided at four locations around the periphery.
A screw 50 is inserted into each adjustment slot 48 via a washer 49 or the like, and is screwed into a screw hole 52 provided in the lower mount 38. This :A adjusting groove hole 48 has a diameter larger than the shaft diameter of the screw 50, and is a so-called stupid hole, so that the upper mount 36 can be slightly displaced left and right after n1 with respect to the lower mount 38.

In this way, the rotating wheel 40 of the galvanometer 33 fixed to the upper mount 36 can be finely adjusted in the front, rear, left, and right directions for alignment, and the positional deviation of the deflection point 30a of the rotating mirror 30 can be adjusted on the lower mount 38. . At this time,
It is preferable that the four adjustment slots 48 described above be provided on the same circumference centered on the center of the rotation shaft 40 at equal intervals. The reason for this is that when fixing the upper mount 36 to the lower part 38, not only can the screws 50 be tightened evenly without unilateral alignment, but also fine adjustment in the direction of rotation of 1qb 4o can be made. .

In the example shown in FIG. 2, the lower mount 38 is a rectangular plate, and in addition to screw holes 52 corresponding to the four adjustment slots 48 of the upper mount 36, small circular holes 54 are provided at four locations around the periphery. ing. Each small hole 54 has a screw 56 of approximately the same diameter as the inside diameter of the small hole 54.The screw 56 is inserted snugly into the small hole 54 without any gaps or looseness, and is screwed into the threaded hole 58 provided in the surface plate 18 to attach the lower mount to the surface plate. It can be fixed at 18 predetermined positions.

As shown in FIG. 1, the light emitted from the laser light source 20 is reflected and deflected at the polarization point 30a of the rotating mirror 30 of the optical deflector 33, enters the scanning lens 70, and due to the swinging of the rotating mirror 30, The optical system is configured such that the laser beams 22a to 22b are deflected to form one main scanning line 74 on the stimulable phosphor sheet 72, which is a sheet-shaped object to be scanned by the sub-scanning section 16. The sub-scanning section 16 has a sub-scanning conveying means 76 such as a roller or a belt conveyor for conveying the stimulable phosphor sheet 72 in the direction indicated by arrow A substantially perpendicular to the main scanning line 74 . Further, along the main scanning line 74, a light guide 78 is provided at a predetermined distance from the stimulable phosphor sheet 72 that is conveyed in the direction shown by arrow A. The light guide 78 is made of a light-guiding sheet-like material, and one end thereof has an entrance end surface 78a having approximately the same length as the main scanning line 74, and the other end thereof is a photodetector 80 consisting of a photoelectric conversion element such as a photomultiplier. It is formed to match the light receiving surface. Therefore, by irradiating the laser beam 22,
All of the stimulated luminescence light emitted from the stimulable phosphor sheet 74 enters the light guide 78, and is configured to be transmitted to the photodetector 80 by the light guide 78, which is a light transmission means.

The laser beam 22 is deflected from 22a to 22b by the swinging of the rotating mirror 30 of the optical deflector 33, and the stimulable phosphor sheet 72 is conveyed along the main scanning line 74 while being sub-scanned and conveyed in the direction shown by arrow A. By scanning the stimulable phosphor sheet 72, the entire surface of the stimulable phosphor sheet 72 can be scanned. It is configured to simultaneously adjust the main scanning speed.

The light beam scanning device used for reading incorporating the optical deflector unit 14 according to the present invention is basically configured as described above, but is not limited to this. It may be incorporated into a light beam scanning device for recording on a recording medium.

For example, as shown in FIG. 3, a laser beam 22 emitted from a laser light source 20 is modulated in advance by some modulation means such as an optical modulator (AOM) in accordance with an information signal, and then a mirror 28 emits a laser beam 22. The laser beam 22 is made incident on the deflection point 30a of the rotating mirror 30 of the deflector unit 14, and the rotating mirror 30 is swung by a predetermined angle by driving the galvanometer 32 of the optical deflector 33, so that the laser beam 22 is
A recording medium 8 such as a photosensitive material is deflected from 2a to 22b, reflected by a rectangular mirror 82 disposed in the middle of the optical path, and conveyed in the sub-scanning direction in the direction indicated by arrow A.
The image information may be recorded on the recording medium 84 by forming a main scanning line 74 on the recording medium 84 and scanning the main scanning line 74.

The optical deflector unit 14 according to the present invention is installed in the optical beam scanning device 10 provided in a radiation image reading device or a radiation image recording device when the device is assembled or repaired or replaced.
Since the structure is such that the deflection point 30a of the rotating mirror 30 of the optical deflector 33 can be adjusted in advance before the optical beam scanning device 10 is installed in the reading device or the recording device. An adjustment device having an optical system optically equivalent to that is required.

As shown in FIGS. 4 and 4a, this adjustment device includes the light beam scanning device 10 shown in FIG. 1 except for the sub-scanning conveyance mechanism.
The optical system is configured so that it can be arranged in the same way as the optical system. Therefore, in these figures, the first
Portions similar to those shown in the figures are designated by the same reference numerals as in FIG. 1, and detailed explanations of the optical system will be omitted.

The lower mount 38 of the optical deflector unit 14 is connected to the surface plate 18
It is attached to the device in a predetermined position by screws 58.

At this time, the lower mount 38 is configured so that it can be accurately attached and interchangeably attached to the respective surface plates 18 of the light beam scanning device 10 and the adjusting device 11 using positioning pins or the like.

In the example shown in FIG. 4, six fine adjustment jigs 90 are set around the lower mount 38 at positions that do not interfere with the laser beam 22 and do not interfere with fixing the upper mount 36 with the screws 50. Arranged on panel 18, F section mount 3
6 can be finely adjusted in any direction.

The fine adjustment jig 90 has a spindle 91 and a support block 92 for supporting the spindle 91. The tip 91a of the spindle 91 is a part for pushing the upper mount 36 to ensure that it moves according to the movement of the spindle, and is preferably semispherical. A disc-shaped knob 93 is attached to the other end of the spindle 91. The intermediate portion of the spindle 91 is provided with a male thread, and is configured to be screwed into a female threaded portion of the support block 92 . The lower end of the support block 92 is fixed to the surface plate 18 by a screw 94 or the like, and the upper mount 36 is attached to the spindle 91.
A female ring is provided at a position where it can be pushed.

The fine adjustment jig 90 is not limited to this, and for example, a ready-made length measuring device such as a micrometer can be moved to a position where the upper mount 36 can be moved without interfering with the optical system using a micrometer stand or the like. It may also be installed.

In the example shown in FIG. 4, six fine adjustment jigs 90 are used, and the fine adjustment jigs 90 are mounted on the upper mount along the center line of the optical axis in the direction of reflection of the laser beam 22 (directions 22a and 22b). One each is provided on the end faces 37a and 37b of 36. Further, along the direction substantially perpendicular to the center line, two fine adjustment jigs 90 are provided at both ends of the end surface 37c of the upper mount 36, and two at both ends of the end surface 37d. It is placed.

When the deflection point 30a of the rotating mirror 30 is set correctly, the rotating mirror 30 is oscillated by the drive of the optical deflector 33, and the main scanning is formed by deflecting the laser beam 22 from 22a to 22b. Lines indicating a set main scanning line 75 and both ends 75a and 75b thereof are formed at a position coinciding with the line 74.

If the deflection point 30a of the rotating mirror 30 is shifted,
After finely adjusting the upper mount 36 with respect to the lower mount 38 so that the main scanning line 74 coincides with the set main scanning line 75 and its both ends 75a and 75b,
The upper mount 36 is configured to be secured to the lower mount 38.

As described above, the upper mount 3 of the optical deflector unit 14
6 and the lower mount 38 are rectangular in shape; however, the shape is not limited to this. The upper mount 36 can suitably attach the optical deflector 32 and can be slightly displaced with respect to the lower mount 38. , any shape may be used as long as it can be fixed to the lower mount 38 with screws or the like after fine adjustment by minute displacement. Also lower mount 3
8 can also be attached to a predetermined position on the surface plate that is the base of the light beam scanning device 10, and may have any shape as long as the upper mount can be placed thereon.

Therefore, it goes without saying that the mounting position, number, and shape of the fine adjustment jig 90 of the optical deflector unit 14 can be changed depending on the shapes of the upper mount 36 and lower mount 38 described above.

Further, in the present invention, an arcuate adjustment slot 48 is used as the adjustment means.
was provided on the upper mount 36, but if it could be finely adjusted between the upper mount 36 to which the optical deflector 32 is fixed and the lower mount 38 for fixing it to the surface plate 38, and if it could be fixed after fine adjustment, what would it be like? It may be a means. moreover,
Symptom A? &, upper mount 36 from the outside to lower mount 3
8, or may be bonded with an adhesive.

Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to these embodiments, and various improvements and changes in design can be made without departing from the gist of the present invention. Of course it is possible.

<Specific Effects of the Invention> The optical deflector unit according to the present invention is basically constructed as described above, and its effects will be explained below.

First, the optical deflector unit 14 shown in FIGS. 2a and 2b is installed at a predetermined position of the optical deflector adjustment device 11 shown in FIGS. It is installed on the surface plate 18 with four screws 58. At this time, the four screws 50 are loosened and the upper mount 36 can be displaced in any direction along the adjustment slot 48.

Next, the laser beam 22 emitted from the laser light source 20
The unnecessary wavelength range is cut by the filter 24,
The diameter of the laser beam 22 is precisely adjusted by the beam expander 26, reflected by the mirror 28, and travels toward the deflection point 30a of the rotating mirror 30 of the optical deflector unit 14.

When the galvanometer 32 of the optical deflector 33 is driven, the rotary mirror 30 swings by a predetermined angle, the laser beam 22 is deflected by a predetermined angle, is converged by the scanning lens 70, and is deflected from laser beams 22a to 22b. Main scanning line 7
4 is formed. If the main scanning line 74 does not match the preset main scanning line 75 and its opposite ends 75a and 75b, this means that the deflection point 30a of the rotary mirror 30 is misaligned.

At this time, the positional deviation of the deflection point 30a is such that the main scanning line 74 is the set main scanning line 75 and its both ends 75a.

75b. That is, by turning the knobs 93 of two of the six fine adjustment jigs 90, the spindle 91 is slightly displaced, and the upper mount 36 of the optical deflector unit 14 that is in contact with the tip 91a of the spindle 91 is rotated. By slightly displacing the deflection point 30a of the rotating mirror 30 attached to the upper mount 36, the deflection point 30a of the rotating mirror 30 attached to the upper mount 36 is slightly displaced.
The main scanning line 74a is adjusted to a position where it coincides with the set main scanning line 75 and its opposite ends 75a and 75b, as shown by exaggerated dotted lines in FIG.

When the adjustment is completed, tighten all four screws 50 that are inserted into the adjustment slots 48 provided in the upper mount 36 and engage with the threaded holes 52 of the lower mount 38 to attach the upper mount 36 to the lower mount 38. stick.

After that, loosen the screws 56 fixing the lower mount 38 to the surface plate 18 of the adjustment device 11, remove the adjusted optical deflector unit 14 from the surface plate 18, and remove the adjusted optical deflector unit 14 from the surface plate 18 as shown in FIG. Surface plate 18 of light beam scanning device 10
and fix the lower mount 38 by tightening the screws 56 at all four locations. At this time, positioning pins are provided on the surface plates 18 of the light beam scanning device 10 and the adjusting device 11, so that the lower mount 38 can be accurately positioned.

Here, the optical deflector unit 14 is the optical beam scanning device 10.
The adjustment device 11 having an optical system optically equivalent to t
Therefore, there is no need for adjustment on the light beam scanning device 10.

Here, the laser light source 20 is turned on, the laser beam 22 is deflected from 22a to 22b by the optical deflector 33, and the main scanning line 7 is suitably formed on the stimulable phosphor sheet 72.
4 can be defined. At the same time, the stimulable phosphor sheet 72 is being transported by the sub-scanning transport mechanism 76 in a direction approximately perpendicular to the main scanning line 74 (the direction indicated by arrow A).
The entire surface of the stimulable phosphor sheet 72, which is the object to be scanned, is scanned two-dimensionally.

The stimulated luminescence light generated at this time is focused on the light guide 78 and photoelectrically converted by the photodetector 80, and all the information stored in the stimulable phosphor sheet 72 is read as an electric signal.

Since the deflection point 30a of the rotating mirror 30 of the optical deflector 33 is sufficiently A-aligned to be incorporated into the optical beam scanning device 10, fine adjustment on the optical beam scanning device 10 is not required.
The position and length of the main scan ll5A74 are always suitable.

Also, when this optical deflector unit 14 is used in the optical beam scanning device 10 of a recording device as shown in FIG.
A suitable main scanning line 74 can be defined above, and when obtained as a visible image, a radiographic image with excellent interpretation characteristics can be obtained.

<Effects of the Invention> As described in detail above, according to the present invention, the optical deflector unit with the mount attached to the optical deflector can be used as a light source for a radiation image reading device or a radiation image recording device during assembly and repair/replacement. Since it is adjusted to 1R[ for installation on the beam scanning device, making adjustments after installation unnecessary, it not only simplifies the time-consuming adjustment during installation, but also saves space for adjustment. Since it becomes unnecessary,
The light beam scanning device, as well as the surface radiation image reading device and/or the radiation image recording device, can be made compact and cost-effective.

Further, according to the present invention, since the optical deflector unit is configured as an adjusted assembly for the optical beam scanning device, no special work or skill is required for assembly, repair or replacement.

Further, according to the present invention, the mount of the optical deflector unit is provided with an adjusting means, and the reading device and/or +iir
Since the adjustment can be made in advance using an adjustment device having an optical system optically equivalent to the light beam scanning device of the recording apparatus, the adjustment is easy and accurate.

Further, according to the present invention, since the deviation of the deflection point of the optical deflector of the optical beam scanning device is adjusted in advance, it is possible to scan the object to be scanned by attaching it to the optical beam scanning device without adjustment. Since the radiation image is preferably scanned two-dimensionally, it is possible to obtain a radiographic image with excellent readability when output as a visible image, both in reading and recording.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a reading light beam scanning device incorporating an optical deflector unit according to the present invention. FIG. 2a is a schematic perspective view of the optical deflector unit according to the present invention, and FIG. 2b is a sectional view taken along line II-[1] of FIG. 2a. FIG. 3 is a schematic perspective view of a recording light beam scanning device incorporating the optical deflector unit of the present invention. FIG. 4 is a schematic top view of the adjustment device used to adjust the positional deviation of the deflection point of the optical deflector unit of the present invention, and FIG. 4a is a schematic top view of the optical deflector unit and the fine adjustment jig. It is a schematic front view. FIG. 5a is a schematic perspective view showing how a conventional optical deflector is attached to a light beam scanning device, and FIG. 5b is a sectional view taken along the line V-V in FIG. 5a. Explanation of symbols 10--Light beam scanning device, 11--Adjusting device for optical deflector unit, 12--Laser light source section, 14-- Optical deflector unit, 16--Sub-scanning section, 18 ...Surface plate, 20--Laser light source, 22.22a, 22b--Laser beam, 24--Filter, 26--Beam expander-1 28,82--Mirror, 30--Rotation Mirror, 30a--Deflection point, 32--Galbameter, 33--Light deflector, 34--Mount, 36--Lower mount, 37a, 37b, 37c, 37d--One end surface, 38・・・
・Lower mount, 40-...Rotation axis, 42...Mirror mount, 44.50.56,94,104...Screw, 46--
・Groove, 48...Adjustment slot, 49...Washer, 52.58,106-...Screw hole, 54...Small hole, 70...Scanning lens, 72...H1-accumulating fluorescence body sheet, 74.74a---Main scanning line, 75... Setting main scanning line, 75a, 75b... Line at the end of setting main scanning line, 76.
...Sub-scanning transport means, 78...Light guide, 78a...Incidence end surface, 80...Photodetector, 84-...Recording medium, 90-...Fine adjustment jig, 91...Spindle , 91 a -- Spindle tip, 92 -- Support block, 93 -- Knob, 100 -- Mount, 102 -- Adjustment [1 Patent applicant: Fuji Photo Film Co., Ltd. Agent
People Patent Attorney Nozomu Watanabe Twisting
Patent attorney Yo Ishii -FIG,
2b

Claims (2)

[Claims] (1) An optical deflector unit used for two-dimensionally scanning an object to be scanned with a light beam, the optical deflector unit being an optical deflector unit that deflects the light beam in one-dimensional direction. and a mount member comprising an upper mount for supporting the optical deflector and a lower mount for attaching to a base, and means for adjusting the position of the upper mount with respect to the lower mount. An optical deflector unit characterized by: (2) The position adjusting means comprises a slot formed in the upper mount, a screw inserted into the slot, and a screw hole provided in the lower mount. The light polarizer unit according to item 1.