JPS5830723A - Optical deflecting device - Google Patents

Abstract

PURPOSE:To facilitate adjustment, by attaching an optical assembled material, where a light source and an image forming part are provided as one body, to the outside cylinder part surrounding the outside of a rotary polyhedral mirror or an oscillatory mirror. CONSTITUTION:An optical assembled material 3 is attached to an attaching face 8 where the side part of an outside cylinder part 7 of a rotary polyhedral mirror 1 provided with a specular surface 2 is cut out. In the optical assembled material 3, a semiconductor laser light source 3 and an image forming part 5 consisting of an optical lens system are arranged on a vertical face passing through the center of the specular surface 2 at a certain angle, and they are so adjusted that the intersection between the optical axis of the light source 4 and the axis of the image forming part 5 is just on the specular surface 2. They are adjusted only in the direction of the axis of the image forming part 5, and an image is formed on a focal surface 6 by this adjustment. Consequently, the adjustment is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The assembly of the light source and the imaging section to the outer cylinder part that encloses the unexploded rotating polygon mirror or the vibrating mirror surface costs $1 for adjustment and is related to the nine-light deflection device.

As a conventional optical deflection device using a rotating polygon mirror, there is one using a gas laser. No. 111 shows an example of the device. A polygon mirror 1t - wrapped in an outer cylinder part 7 to prevent damage and dirt, placed outside, irradiated a laser beam on the mirror surface from a nine light source 10 using a nine gas laser, and reflected light through an imaging part 11, 1181, etc. The name of the result is shown in image 6. In this case, the light source 10 and the imaging sections 11 and 111 are arranged independently, in addition to the large number of devices using a gas laser.
It is difficult to adjust it to match the mirror surface of the multi-sided i11, and it takes a lot of time and effort to assemble and adjust it. This is difficult because the directional angle between the light source and the imaging section and the distance between the mirror surface and the imaging section become four variable elements! ! l17fiTIji is an example. ζ On the other hand, a method has been proposed in which a part of the outer cylinder enclosing the rotating polygon mirror is attached to make the device into a small star.

Furthermore, a method has been proposed in which a semiconductor laser is used as a light source and the light source and imaging section are separately attached to the outer cylinder. Looking at this from the perspective of photoelectric adjustment, the variable range is narrower than in the case of Figure 1.

The fact that the light source and the imaging section are still separately adjusted in a two-dimensional manner is basically the same as in the case of FIG. 1.

An object of the present invention is to provide a light deflection device in which a light source and an imaging section can be easily attached and adjusted to the outer cylinder part of the vibrating mirror before the rotating polygon i1.

In order to achieve the above-mentioned objectives, the optical deflection device of the present invention emits a light beam from a mirror IjK light source of a rotating polygon mirror or a vibrating mirror, and uses the imaging section to form an image of the reflected light on the surface to be scanned. The apparatus KThh is characterized in that an optical assembly section in which the light source and the image forming section are integrally provided is sloped on the outer cylinder section that encloses the outside of the rotating polygon mirror or the vibrating mirror.

The implementation of the present invention will be described in detail below.

When a light source and an imaging section are attached to the outer cylinder of the JIII or rotating polygon mirror of the present invention, the most difficult factor is the jump between the optical axis of the light source and the central axis of the imaging section. It's an angle. Therefore, an assembly section with this angle at constant is made in advance, and this assembly section is attached to the outer cylinder section so that the mounting surface thereof is perpendicular to the central axis of the imaging section. This makes it possible to perform alignment using OSm only in the direction of the central axis of the imaging section.

No. 214 is an explanatory diagram showing the configuration of an example of the present invention.

This is a good example of the interior of the external tube part of the same IllI polyhedral mirror. That is, a polygonal rotating body 1 with a mirror 1i2 on each side is mounted inside the outer cylinder 117 Wc1IL and driven to rotate. A mounting surface 8 is formed by cutting out the side of the outer cylinder section 7, and the optical assembly section S is mounted to this surface. Optical assembly section shAs mentioned above, an image 1!5 consisting of a light source 4 including a semiconductor laser and an optical lens system p is arranged at a constant angle on a vertical plane passing through the center of the mirror surface 20, and the optical axis of the light source 40 and Adjustment is made so that the intersection of the central axes of the imaging section 5 is exactly on the mirror surface 2. The adjustment direction is only the direction of the center axis of the imaging section 50, and the image is formed on the imaging surface 6 by this adjustment. Therefore, if the central axis of the imaging section 5 is set perpendicular to the mounting surface 8, it becomes possible to uniformly adjust the adjustment clearance only in this direction.

FIG. 5 is an explanatory diagram showing the configuration of another embodiment of the present invention.

This figure shows a case in which a vibrating mirror is provided in place of the rotating polygon mirror in the outer cylinder. That is, since the vibrating mirror surface 12 vibrates from side to side about the fulcrum 1s, a laser beam is irradiated from the light source 4 of the optical assembly section 3 to the I1IWJ, and the laser beam passes through the imaging section 5 to the imaging surface 4. However, this optical assembly 6
The effect that JIIIE simplifies is similar to that in Figure 2.

As explained above, according to the present invention, an optical assembly section in which a light source and an imaging section are integrally provided is attached to the outer cylinder part of a rotating polygon mirror or a vibrating mirror. C11ll can be adjusted extremely easily with only one direction adjustment.
It is possible to reduce not only the labor required for ffiK but also 11!1 hours.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is an explanatory diagram showing the configuration of an embodiment of the present invention, and FIG. 5 is an explanatory diagram showing the configuration of another embodiment of the present invention! In the figure, 1 is a rotating body and 2 is am
%3 is optical assembly department, 4 sister light source, 5 patent applicant Fujitsu Ltd. Fukudai Shioto, patent attorney 1) Yoshishige Saka Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] The rotating polygon mirror is equipped with a light deflection device KsP that irradiates a beam from a light source onto the vibrating mirror and forms an image of the reflected light on the scanned surface (by the imaging unit), and the external part of the rotating polygon mirror or vibrating mirror is An optical deflection device comprising: an outer cylinder 1iK enclosing the light source; and an optical assembly unit integrally attaching the light source and the imaged image.