JP2000352681A - Optical part and holding structure therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical part capable of being plurally laminated in the sideways direction of long-length shape and capable of arranging all the stages at appropriate positions in the sideways direction. SOLUTION: This optical part is provided with sideways direction attaching reference parts 2a to 2c and a projecting shape part/recessed shape part 3a on the upper surface part 5a in the sideways direction of a long-length lens 1 being the optical part formed in the long-length shape and laminated and arranged in plural stages in the sideways direction. Then, sideways direction attaching reference parts 2d to 2e and a projecting shape part/recessed shape part 3b are arranged on the lower surface part 5b in the sideways direction of the lens 1, and flange-stage projection parts 4a and 4b are arranged at both ends in the lengthwise direction of the lens 1. The lens 1 can be used in a state where it is plurally laminated each other, and can be attached upside down because its shape is axially symmetric with an optical axis X as an axis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning structure for a long optical component, and more particularly to an optical writing unit of a laser writing optical system used for a so-called laser printer, digital copying machine, laser facsimile, and the like. fθ
The present invention relates to an optical component suitable for a lens-type toric lens and the like and a holding mechanism therefor.

[0002]

2. Description of the Related Art A laser writing optical system used in an image forming apparatus such as a so-called laser printer, digital copier, or laser facsimile scans a photosensitive member serving as an image carrier with a laser beam controlled according to an image signal. To expose. In a general laser writing optical system, a laser beam is reflected by a rotating polygon mirror rotating at a high speed, is incident on an fθ lens, and irradiates a photoconductor as a parallel light beam. A rotating polygon mirror, that is, a polygon mirror driven to rotate,
A scanning optical system for performing deflection scanning by a laser beam is configured. The fθ lens for causing the laser beam to be deflected and scanned to enter the photoconductor as a parallel light beam includes, for example, a condenser lens and a toric lens.

In recent years, for the purpose of multicolor printing for, for example, color printers and color copiers, a plurality of laser beam sources for each color are provided, and a plurality of laser beams emitted from the plurality of laser beam sources are simultaneously emitted. Various laser writing optical systems have been proposed for performing deflection scanning to perform parallel writing and writing of scanning lines of a plurality of colors on a plurality of photoconductors. As described above, for simultaneous deflection scanning of a plurality of laser beams, there is a method in which the toric lens forming the fθ lens has a long shape and is used by being stacked and arranged in a plurality of stages in the short direction.

As described above, a toric lens having a long shape and used by being stacked in a plurality of layers in the short direction is used in the stacked short direction, the longitudinal direction corresponding to the beam scanning direction, and the optical axis. If the positioning along the optical axis direction is not accurately performed, the image written on the photoconductor will be distorted. Japanese Patent Application Laid-Open No. H10-3052 discloses an example of a conventional optical component such as a toric lens and the like and a holding structure therefor. That is, Japanese Patent Application Laid-Open No. Hei 10-3052 discloses an optical component holding structure capable of holding optical components such as lenses in multiple stages without being affected by expansion and contraction. In the optical component holding structure disclosed in Japanese Patent Application Laid-Open No. H10-3052, a convex portion and a concave portion are provided at the center of each of two long optical components stacked and arranged, and positioning in the longitudinal direction is performed. To do.

[0005]

As described above, in the prior art disclosed in Japanese Patent Application Laid-Open No. 10-3052, a holding structure in which a plurality of long optical components are stacked and arranged in a plurality of layers vertically. The mounting reference in the direction is provided only on one side in the transverse direction, and it has not been possible to properly position a plurality of optical components when they are held in multiple stages. In the configuration disclosed in Japanese Patent Application Laid-Open No. 10-3052,
Since the length of the optical component differs for each stage, each optical component could not be installed at an arbitrary stage. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an optical component that can be stacked and arranged in a short direction in a long shape and a holding structure thereof.

[0006] It is an object of the present invention to provide an optical component capable of stacking a plurality of stages, and arranging all the stages at appropriate positions in the lateral direction. An object of claim 2 of the present invention is to provide an optical component capable of appropriately positioning all the stages of a multi-layered arrangement in the longitudinal direction and arbitrarily arranging them in the lateral direction. It is in. The object of claim 3 of the present invention is to
In particular, it is an object of the present invention to provide an optical component that can be appropriately positioned and arranged in the optical axis direction.

A further object of the present invention is to provide an optical component which can be mass-produced in large numbers due to a plurality of stacked arrangements and which can be easily reduced in cost. An object of claim 5 of the present invention is to provide an optical component holding structure that can be arranged at an arbitrary stage in a multi-layered arrangement. It is an object of claim 6 of the present invention to provide an optical component holding structure capable of accurately positioning and arranging a plurality of stacked optical components with respect to a housing.

[0008]

According to the first aspect of the present invention, there is provided an optical component for achieving the above object.
In an optical component having a long shape and stacked in a plurality of layers in the short direction, mounting reference structures are arranged on both surfaces in the short direction. In the optical component according to the present invention as set forth in claim 2, the concave and convex form a pair of convex and concave shapes on both surfaces in the lateral direction, and are adjacent to each other in the lateral direction as a longitudinal mounting reference. At least one pair of convex portions and concave portions for each surface fitting into the corresponding concave shape and convex shape of the other optical component, at predetermined locations including near the central portion in the longitudinal direction on both surfaces in the short direction. It is characterized by forming.

An optical component according to a third aspect of the present invention is characterized in that flange-shaped projections are formed at both ends in the longitudinal direction as a mounting reference in the optical axis direction. An optical component according to a fourth aspect of the present invention is characterized by being integrally molded with a resin material.

According to a fifth aspect of the present invention, there is provided an optical component holding structure according to the present invention, which has a long shape, mounting reference structures are arranged on both sides in the short direction, and irregularities are formed on both sides in the short direction. A pair of convex shape and concave shape are formed, and the convex shape and the concave shape fit into the corresponding concave shape and convex shape of the other optical component adjacent in the short direction, respectively, as a reference in the longitudinal direction. At least a pair of convex portions and concave portions on each surface are formed at predetermined locations including the vicinity of the central portion in the longitudinal direction on both surfaces in the lateral direction, and the mounting reference portion in the optical axis direction is formed in the longitudinal direction. It is characterized in that a plurality of optical components of the same shape formed at both ends are stacked and arranged in a plurality of stages.

According to a sixth aspect of the present invention, the optical component holding structure according to the present invention has a long shape, the mounting reference structures are arranged on both sides in the short direction, and irregularities are formed on both sides in the short direction. A pair of convex shape and concave shape are formed, and the convex shape and the concave shape fit into the corresponding concave shape and convex shape of the other optical component adjacent in the short direction, respectively, as a reference in the longitudinal direction. At least a pair of convex portions and concave portions on each surface are formed at predetermined locations including the vicinity of the central portion in the longitudinal direction on both surfaces in the lateral direction, and the mounting reference portion in the optical axis direction is formed in the longitudinal direction. A plurality of optical components having the same shape formed at both ends and stacked and arranged in a plurality of stages, and abutting on the mounting reference structure on the lower surface of the lowermost optical component in the plurality of stacked stages; Convex shape of the lower surface of the part And an optical housing having at least one position restricting portion that fits into at least one of the concave portion and the concave portion, and that abuts the mounting reference portion in the optical axis direction at both ends in the longitudinal direction of the optical component. It is characterized by:

[0012]

In other words, the optical component according to the first aspect of the present invention has a long reference shape and the mounting reference structures are arranged on both sides in the short direction of the optical component which is laminated and arranged in a plurality of stages in the short direction. With such a configuration, since positioning can be performed with reference to both sides in the short direction of the long shape, it is possible to stack and arrange a plurality of the optical components in the short direction, and all the steps are properly adjusted. It becomes possible to arrange in a position.

In the optical component according to a second aspect of the present invention, the convex and concave portions are formed by forming a pair of concave and convex portions on both surfaces in the short direction, and are provided in the short direction as mounting reference in the long direction. At least one pair of convex portions and concave portions for each surface fitted with the corresponding concave shape and convex shape of another adjacent optical component, a predetermined shape including the vicinity of the central portion in the longitudinal direction on both surfaces in the short direction. Formed in places. With such a configuration, at least a pair of convex portions and concave portions are formed on each surface with irregularities forming a pair on both surfaces in the lateral direction,
Since it was formed as a reference for attachment in the longitudinal direction, in particular, all the steps of the stacked arrangement of a plurality of steps are appropriately positioned in the longitudinal direction by fitting of the convex and concave parts, and set in any direction in the short direction. It becomes possible to arrange.

In the optical component according to the third aspect of the present invention, flange-like projections are formed at both ends in the longitudinal direction as mounting reference in the optical axis direction. With such a configuration, the projections at both ends in the longitudinal direction are used as the mounting reference in the optical axis direction.
It is possible to appropriately position and arrange in the optical axis direction. The optical component according to claim 4 of the present invention is formed by integrally molding a resin material. With such a configuration, a large number of products having the same shape can be manufactured inexpensively and easily. In particular, it is easy to mass-produce a large number of products due to a plurality of stacked arrangements, thereby reducing the cost. .

According to a fifth aspect of the present invention, there is provided an optical component holding structure having a long shape, mounting reference structures arranged on both sides in a short direction, and a pair of irregularities on both sides in the short direction. Each convex surface and concave shape, and the convex shape and the concave shape are fitted to the corresponding concave shape and convex shape of the other optical component adjacent in the short direction, respectively, as a mounting reference in the longitudinal direction. At least a pair of convex portions and concave portions are formed at predetermined positions including near the central portion in the longitudinal direction on both surfaces in the short direction, and mounting reference portions in the optical axis direction are formed at both ends in the longitudinal direction. A plurality of optical components having the same shape are stacked and arranged in a plurality of stages. With such a configuration, the mounting reference of the optical component having the long shape is arranged on both sides in the short direction and both ends in the longitudinal direction. In particular, it is possible to arrange the optical component in an arbitrary stage of a multi-layered arrangement. It becomes possible.

According to a sixth aspect of the present invention, there is provided an optical component holding structure having a long shape, mounting reference structures disposed on both sides in a short direction, and a pair of irregularities on both sides in the short direction. Each convex surface and concave shape, and the convex shape and the concave shape are fitted to the corresponding concave shape and convex shape of the other optical component adjacent in the short direction, respectively, as a mounting reference in the longitudinal direction. At least a pair of convex portions and concave portions are formed at predetermined positions including near the central portion in the longitudinal direction on both surfaces in the short direction, and mounting reference portions in the optical axis direction are formed at both ends in the longitudinal direction. Then, a plurality of optical components having the same shape that are stacked and arranged in a plurality of stages are attached to the optical housing, and the optical housing is attached to the lower surface of the lowermost optical components in the stacked stages. Standard Abuts on at least one of the convex portion and the concave portion of the lower surface of the optical component, and contacts the mounting reference portions in the optical axis direction at both ends in the longitudinal direction of the optical component. It has at least one position restricting portion.

[0017] With such a configuration, at least one position restricting portion provided on the optical housing abuts on the mounting reference structure on the lower surface of the lowermost optical component in a plurality of stacked stages. Since it fits into at least one of the convex portion and the concave portion of the lower surface of the optical component and abuts the mounting reference portions in the optical axis direction at both ends in the longitudinal direction of the optical component, particularly, a plurality of stages. It is possible to accurately position and arrange the stacked optical components with respect to the housing.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an optical component according to the present invention. 1 and 2 show the configuration of a long lens which is an optical component according to a first embodiment of the present invention. 1 is a perspective view of a long lens, and FIG. 2 is (a) a top view, (b) a front view, and (c) a bottom view of the long lens. FIG. 1 and FIG. 2 show a plurality of long optical components that are stacked and arranged in multiple stages to form a scanning optical system corresponding to a plurality of positions on a photoconductor, for example, a toric lens or the like forming an fθ lens. 3 shows a long lens. The long lens 1 has short-side mounting reference portions 2a to 2f, a convex / concave portion 3a on the upper surface, a convex / concave portion 3b on the lower surface, a flange-like protrusion 4a at one longitudinal end, A flange-shaped protrusion 4b at the other end in the longitudinal direction, a top surface 5a in the transverse direction,
A short-side lower surface 5b and a lens body 6 are provided.

That is, the long lens 1 as an optical component
Has a shape in which the long lens body 6 is accommodated in a frame-like portion forming a short rectangular tube. The frame-shaped portion includes short-side mounting reference portions 2a to 2f, a convex / concave portion 3a on the upper surface, and a convex / concave portion 3a on the lower surface.
b, a flange-like protrusion 4a at one end in the longitudinal direction, a flange-like protrusion 4b at the other end in the longitudinal direction, an upper surface 5a in the short direction, and a lower surface 5b in the short direction. A short-direction mounting reference portion 2a on the short-direction upper surface portion 5a of the frame-shaped portion;
2b and 2c are formed, and the short-direction attachment reference portions 2d, 2e and 2f are formed on the short-direction lower surface 5b of the frame-shaped portion.
To form Further, a pair of convex portions and concave portions, which are provided with a pair of convex portions and concave portions, which provide an attachment reference in the longitudinal direction on the incident surface side near the center in the longitudinal direction, are provided on the upper surface 5a in the lateral direction of the frame portion. The concave portion 3a is formed.

Similarly, the short-side lower surface 5b of the frame-like portion is provided with a longitudinal mounting reference on the incident surface side substantially at the center in the longitudinal direction. To form a pair of convex / concave portions 3b which are a corresponding pair of convex / concave portions. Further, flange-shaped projections 4a and 4b for providing an attachment reference in the optical axis direction are formed on both ends in the longitudinal direction of the frame-shaped portion so as to project in a flange-like shape in the longitudinal direction.

Accordingly, the long lens 1 has three mounting reference portions 2a to 2c and 2 on both surfaces in the short direction, that is, on the short upper surface 5a and the short lower surface 5b.
d to 2f (corresponding to claim 1). As shown in the figure, a convex / concave portion 3a composed of a pair of convex and concave portions is provided near the central portion in the longitudinal direction of the lateral upper surface 5a and the lateral lower surface 5b, respectively.
And 3b are provided (corresponding to claim 2).
In this case, the convex portions of the convex / concave portions 3b face the convex portions of the convex / concave portions 3a in pairs,
The convex portions of the convex / concave portions 3b face the concave portions of the convex / concave portions 3a in pairs. Each of the convex portions is formed to have a size that can fit into each of the concave portions. The long lens 1 configured as described above can be used by laminating a plurality of them (claim 1). Further, since the long lens 1 is axially symmetric with respect to the optical axis X, it can be mounted upside down (claim 2).

FIGS. 3 and 4 show a laminated structure of long lenses, which are optical components according to a second embodiment of the present invention. is there. FIG. 3 is a perspective view of a laminated structure of a long lens, and FIG.
FIG. 4 is a front view of the laminated structure of the long lens as viewed from the incident surface side. In this embodiment, a plurality of long lenses are arranged in a vertically stacked manner in multiple stages, and in FIG. 3, two identical lenses each having the same configuration as the long lens 1 in FIG. This figure shows a case where the long lenses 11 and 12 are stacked and arranged. By arranging a plurality of long lenses 11 and 12 in this manner, the height (thickness) of the lenses is increased.
Therefore, the size of the optical unit can be reduced.

The long lens 11 has a convex portion 11a and a concave portion 11b corresponding to the convex / concave portion 3a on the upper surface side in FIG. 1, and a convex / concave portion 3b on the lower surface side. It includes a concave portion 11c and a convex portion 11d, flange-like protrusions 11e and 11f corresponding to the flange-like protrusions 4a and 4b at both ends in the longitudinal direction, respectively, and a lens body 11g. Further, the long lens 12 has a convex portion 12a and a concave portion 12b corresponding to the convex / concave portion 3a on the upper surface side in FIG. 1, and a concave portion corresponding to the convex / concave portion 3b on the lower surface side. Shape part 12c and convex shape part 1
2d, flange-shaped projections 4a and 4b at both ends in the longitudinal direction
Flange-like projections 12e and 12 respectively corresponding to
f, and a lens body 12g.

That is, a pair of the convex portions 11a and the concave portions 11b provided on the upper surface side of the long lens 11 are paired, and a pair of the concave portions 11 are formed on the lower surface side of the long lens 11.
c and the convex shape 11d face each other. Long lens 12
A pair of convex portions 12a and concave portions 12b provided on the upper surface of the long lens 11 respectively correspond to a pair of concave portions 11c and convex shapes 11d on the lower surface side of the long lens 11. A pair of the convex portion 12a and the concave portion 12b on the upper surface side of the long lens 12 are paired, and a pair of the concave portion 12c and the convex shape 12d face the lower surface side of the long lens 12. The convex portion 12 provided on the upper surface side of the long lens 12
a and the concave shape 12b are fitted to the concave portion 11c and the convex shape 11d on the lower surface side of the long lens 11, respectively, so that the relative positioning between the two long lenses 11 and 12 in the longitudinal direction can be determined. Done, lens body 1
The positional relationship between 1g and 12g can be set correctly.

The long lens 11 determines an upper reference plane 11h in the short direction and a lower reference plane 11i in the short direction, and the long lens 12 has an upper reference plane 12h in the short direction and a lower reference plane 11h. The side reference plane 12i is determined. As shown in the drawing, the lower reference surface 11i of the long lens 11 is brought into contact with the upper reference surface 12h in the short direction of the long lens 12 so that both surfaces of the long lens 12 coincide with each other. The long lens 11 can be correctly positioned in the direction with respect to the lower reference surface 12i in the hand direction, and the position of the upper reference surface 11h of the long lens 11 can be set correctly. In this way, the plurality of long lenses 11 and 12
Can be used in a multi-layered manner by overlapping each other in the lateral direction (corresponding to claim 1). In addition, since the long lenses 11 and 12 have the same shape, they can be attached to arbitrary stages of a multi-stage configuration as desired (corresponding to claim 5).

Furthermore, since the long lenses 11 and 12 are both axially symmetrical with respect to the optical axis, they can be mounted upside down as desired (corresponding to claim 2). FIG. 5 shows an optical component holding mechanism according to a third embodiment of the present invention. The long lens 1 shown in FIG. 1 and the long lenses 11 and 1 shown in FIG.
2 shows a holding structure of an optical housing for holding a laminated structure and the like of No. 2. FIG. 5 is a perspective view showing a configuration of a long lens mounting portion of the optical housing 70 that holds the long lens 1 of FIG. 1 or the long lenses 11 and 12 of FIG.

As shown in FIG. 5, the optical housing 70 includes a lens receiving portion 71a, a reference groove 71b, short-side reference surfaces 72a and 72b, and an optical-axis direction reference surface 72a '.
And 72b 'are appropriately formed. Optical housing 7
In the case of the long lens 1 shown in FIG. 1, the short-side lower surface 5b is brought into contact with the 0-side lens receiving portion 71a and the short-side reference surfaces 72a and 72b, so that the short direction, that is, the height is reduced. Direction positioning. In the case of the laminated long lenses 11 and 12 in FIG. 3, the lens receiving portion 71a on the optical housing 70 side, the short-side reference surface 72
The lower reference surface 12i of the long lens 12 shown in FIG. 4 is brought into contact with the long lenses 1a and 72b in the short direction of the long lens 1 or the stacked long lenses 11 and 12, that is, Position in the vertical direction. If necessary, the uppermost long lens may be pressed and fixed from above by a leaf spring or the like (not shown).

The reference groove 71b of the optical housing 70
Then, by fitting the convex part of the convex / concave part 3b of the long lens 1 or the convex part 12d of the long lens 12, positioning in the longitudinal direction is performed. Further, with respect to the optical axis direction reference planes 72a 'and 72b' on the optical housing 70 side, which are the optical axis direction reference planes 72a 'and 72b', the flange-shaped projections 4a and 4b or the lengths which are the optical axis direction mounting reference on the long lens 1 side. The flange-shaped projections 12e and 12f, which are optical axis direction mounting references on the side of the length lens 12, are brought into contact with each other,
It is pressed from the incident surface side by a leaf spring (not shown) or the like to perform positioning in the optical axis direction. As described above, if the long lens 1, 11, or 12 expands and contracts in the longitudinal direction due to a temperature rise and a temperature drop, respectively, if the pressure is fixed by a leaf spring or the like, the optical axis center does not move. Generation of strain due to internal stress can also be suppressed (corresponding to claims 3 and 6).

FIGS. 6 and 7 show a long lens which is an optical component according to a fourth embodiment of the present invention, and shows a laminated structure of the long lenses 11 and 12 shown in FIG. I have. 6A and 6B show a laminated structure of the long lenses 11 and 12 in the first state, wherein FIG. 6A is a cross-sectional view thereof, and FIG. 6B is a schematic view showing a beam scanning line.
FIG. 7 shows the long lenses 11 and 12 in the second state.
(A) is a sectional view thereof, and (b) is a schematic view showing a beam scanning line. Some of the processed long lenses 11 and 12 have distortion in their generatrix. Such long lenses 11 and 12
When scanning over the photoreceptor using a scanning optical system configured by using the above, distortion occurs in the scanning lines. When performing multiple transfer such as when forming a color image, if the directions of the distortions of the scanning lines generated on a plurality of photoconductors do not match, a color shift appears on an output image, causing image deterioration. Becomes

FIG. 6 shows an example of two-color transfer, and FIG.
The scanning lines 8a and 8b respectively corresponding to the two laser beams R1 and R2 shown in FIG. In the case of the long lens according to the present invention, for example, reference surfaces 11h and 11i for attachment are formed on both surfaces in the short direction of the long lens 11 (corresponding to claim 1), and the long lens. A pair of convex portions 11a / concave portions 11b and convex portions 11d /
A concave portion 11c is provided to form an axially symmetric shape (corresponding to claim 2). Therefore, the long lens 11
As shown in FIG. 7A, it can be mounted upside down. As a result, as shown in FIG.
The directions of distortion of the scanning lines 8a 'and 8b' corresponding to the light beams R1 'and R2' can be made uniform.

Further, for example, as shown in FIG. 3, FIG. 4, FIG. 6, and FIG. May cause performance degradation. When such performance degradation occurs, only the corresponding long lens can be replaced with a new lens or a recycled product. As described above, if the plurality of long lenses have the same shape, a necessary long lens can be attached to an arbitrary stage, and the degree of freedom at the time of replacement is not reduced (corresponding to claim 5). Further, if the long lens 1, the long lenses 11 and 12, and the like are processed and manufactured by molding with a resin material, parts having the same complicated shape can be processed and manufactured stably in large quantities ( (Corresponding to claim 4). The present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with various modifications without departing from the scope of the invention.

[0032]

As described above, according to the present invention, the mounting reference structures are arranged on both sides in the short direction of the optical parts which are long and are arranged in a plurality of layers in the short direction. Accordingly, since positioning can be performed with reference to both sides of the long shape in the short direction, it is possible to stack and arrange a plurality of the optical components in the short direction, and to arrange all the steps at appropriate positions. In particular, according to the first aspect of the present invention, a plurality of stages can be stacked, and all the stages can be arranged at appropriate positions in the lateral direction. Optical components can be provided.

According to the optical component of the second aspect of the present invention, both sides in the short direction have a pair of projections and recesses, and have a convex shape and a concave shape. At least one pair of convex portions and concave portions for each surface fitting into the corresponding concave shape and convex shape of the other optical component adjacent in the direction, near the center in the longitudinal direction on both surfaces in the short direction. Since it is formed at a predetermined location including at least one pair of convex and concave portions on each surface with irregularities forming a pair on both surfaces in the short direction, as a mounting reference in the longitudinal direction, particularly, a plurality of All the steps in the stacking arrangement of the steps can be appropriately positioned in the longitudinal direction and arranged in an arbitrary direction in the short direction by fitting the convex portions and the concave portions.

According to the optical component of the third aspect of the present invention, by forming the flange-shaped protrusions as mounting reference in the optical axis direction at both ends in the longitudinal direction, the protrusions at both ends in the longitudinal direction are formed. Since it is used as an attachment reference, it is particularly possible to appropriately position and arrange in the optical axis direction.
According to the optical component of the fourth aspect of the present invention, by integrally molding with a resin material, a large number of components having the same shape can be manufactured inexpensively and easily. Because of the stacked arrangement, it is easy to mass-produce a large number of units and reduce the cost.

According to the optical component holding structure of the fifth aspect of the present invention, each of the optical component holding structures has a long shape, mounting reference structures are arranged on both surfaces in the short direction, and irregularities are formed on both surfaces in the short direction. To form a convex shape and a concave shape, and as a longitudinal mounting reference, each of the convex shape and the concave shape fit into the corresponding concave shape and the convex shape of the other optical component adjacent in the lateral direction, respectively. At least one pair of convex portions and concave portions are formed at predetermined positions including the vicinity of the central portion in the longitudinal direction on both surfaces in the short direction, and the attachment reference portions in the optical axis direction are both ends in the longitudinal direction. Since a plurality of optical components of the same shape formed in the same shape are stacked and arranged in a plurality of stages, the mounting reference of the optical component having a long shape is arranged on both sides in the short direction and both ends in the longitudinal direction,
In particular, it is possible to arrange the optical components in an arbitrary stage of the multilayer arrangement.

According to the optical component holding structure of the sixth aspect of the present invention, each of the optical component holding structures has a long shape, the mounting reference structure is disposed on both sides in the short direction, and irregularities are formed on both sides in the short direction. To form a convex shape and a concave shape, and as a longitudinal mounting reference, each of the convex shape and the concave shape fit into the corresponding concave shape and the convex shape of the other optical component adjacent in the lateral direction, respectively. At least one pair of convex portions and concave portions are formed at predetermined positions including near the central portion in the longitudinal direction on both surfaces in the short direction, and the mounting reference portions in the optical axis direction are both ends in the longitudinal direction. To form
A plurality of optical components of the same shape arranged in a plurality of layers are attached to the optical housing, and the optical housing is attached to the mounting reference structure on the lower surface of the lowermost optical component in the plurality of layers arranged in a stack. At least one of which is fitted to at least one of the convex portion and the concave portion of the lower surface of the optical component, and abuts the mounting reference portion in the optical axis direction at both ends in the longitudinal direction of the optical component; With the configuration having the number of position restricting portions, at least one position restricting portion provided on the optical housing abuts on the mounting reference structure on the lower surface of the lowermost optical component in a plurality of stacked stages, and Along with fitting to at least one of the convex portion and the concave portion of the lower surface of the optical component,
Since the optical components come into contact with the mounting reference portions in the optical axis direction at both ends in the longitudinal direction, in particular, it is possible to accurately position and arrange the optical components to be stacked in a plurality of stages with respect to the housing. Become.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an optical component according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the configuration of the optical component of FIG. 1 in detail;
(A) is a top view, (b) is a front view, and (c) is a bottom view.

FIG. 3 is a perspective view illustrating a configuration of an optical component stacked in two stages according to a second embodiment of the present invention.

FIG. 4 is a front view showing in detail a configuration of an optical component stacked in two stages in FIG. 3;

FIG. 5 is a perspective view illustrating a configuration of a camera housing for explaining a holding structure of an optical component according to a third embodiment of the present invention.

FIG. 6 is a diagram illustrating distortion of a scanning line due to distortion of a bus of an optical system in a first arrangement configuration before arrangement compensation of optical components stacked in two stages according to a fourth embodiment of the present invention. (A) is a longitudinal sectional view of an optical component, and (b) is a schematic diagram of a scanning line.

FIG. 7 is a diagram illustrating distortion of a scanning line due to distortion of a bus of an optical system in a second arrangement configuration after arrangement compensation of optical components stacked in two stages according to a fifth embodiment of the present invention. (A) is a longitudinal sectional view of an optical component, and (b) is a schematic view of a scanning line.

[Explanation of symbols]

Reference Signs List 1 Long lens (optical component) 2a to 2f Reference portion for mounting in short direction 3a, 3b Convex / concave portion (reference for mounting in longitudinal direction) 4a, 4b Flange-shaped protrusion (reference for mounting in optical axis direction) 5a Short Upper surface part 5b Shorter lower surface part 6 Lens body 11 Long lens (optical component) 11a, 11d Convex part (Longitudinal mounting reference) 11b, 11c Concave part (Longitudinal mounting reference) 11e, 11f Flange-shaped protrusion 11g Lens body 11h Transverse upper reference surface 11i Transverse lower reference surface 12 Long lenses (optical components) 12a, 12d Convex parts (Longitudinal mounting reference) 12b, 12c Concave portion (Longitudinal mounting reference) 12e, 12f Flange-shaped protrusion (Optical axis mounting reference) 12g Lens body 12h Short direction upper reference surface 12i Transverse lower reference surface 70 Optical housing 71a Lens receiving portion 71b Reference groove 72a, 72b Transverse reference surface 72a ', 72b' Optical axis reference surface R1, R2, R1 ', R2' Light beam (laser beam)

Claims (6)

[Claims] 1. An optical component having a long shape and laminated in a plurality of layers in a short direction, wherein mounting reference structures are arranged on both surfaces in the short direction. 2. A pair of concave and convex portions on both sides in the transverse direction to form a convex shape and a concave shape, and a corresponding concave shape of each of the other optical components adjacent in the transverse direction as a mounting reference in the longitudinal direction. And at least a pair of convex portions and concave portions for each surface fitted in the convex shape, are formed at predetermined locations including near the central portion in the longitudinal direction on both surfaces in the short direction. 2. The optical component according to 1. 3. The optical component according to claim 1, wherein flange-shaped protrusions are formed at both ends in the longitudinal direction as mounting reference in the optical axis direction. 4. The optical component according to claim 1, wherein the optical component is integrally formed of a resin material. 5. An elongate shape, mounting reference structures are arranged on both sides in the short direction, and irregularities form a pair of protrusions and recesses on both sides in the short direction. As an attachment criterion, at least one pair of convex portions and concave portions are provided on each surface where the convex shape and the concave shape fit into the corresponding concave shape and the convex shape of the other optical component adjacent in the short direction, respectively. A plurality of optical components of the same shape, which are formed at predetermined locations including the vicinity of the central portion in the longitudinal direction on both surfaces in the lateral direction and mounting reference portions in the optical axis direction are formed at both ends in the longitudinal direction. An optical component holding structure characterized by being stacked and arranged in a plurality of stages. 6. An elongated reference shape, mounting reference structures are arranged on both sides in the short direction, and irregularities form a pair of projections and recesses on both sides in the short direction. As an attachment criterion, at least one pair of convex portions and concave portions are provided on each surface where the convex shape and the concave shape fit into the corresponding concave shape and the convex shape of the other optical component adjacent in the short direction, respectively. The same shape that is formed at a predetermined position including the vicinity of the central portion in the longitudinal direction on both surfaces in the lateral direction, and the mounting reference portions in the optical axis direction are formed at both ends in the longitudinal direction, and are stacked and arranged in a plurality of stages. A plurality of optical components, abutting the mounting reference structure on the lower surface of the lowermost optical component in a plurality of stacked stages, and at least one of a convex portion and a concave portion on the lower surface of the optical component When mated Moni, holding structure of an optical component characterized by comprising an optical housing having at least one position regulating portion in the longitudinal direction of the mounting reference portion in the optical axis direction at both ends of the optical component in contact.