JPS58127912A - Optical scanning system - Google Patents

Abstract

PURPOSE:To reduce the size of a titled device and to perform scanning without disturbance by connections by making the rays from plural light sources incident to the different mirror surfaces of one piece of rotary polyhedral mirror and scanning plural scanning regions without interruption. CONSTITUTION:The rays from laser diodes 7-1, 7-2 are reflected on the different surfaces of a rotary polyhedral mirror 8, and pass respectively through imaging optical systems 9, which scan the inside of the regions bisected from the entire scanning region by plane mirrors 10. Thus, the size of the device is reduced. If the boundary points of the partial scanning adjacent in the boundary regions are set at random, the disturbance by connections is suppressed. Therefore, a table 1 which stores the distances m between the randomly selected boundary points and a reference point and a table 2 which stores the data in the partial regions are prepared, and the inside of the partial scanning region 1 is scanned with the start signal of a line start signal generating part 11, and when the scanning cames to the reference point, the table 1 is referred to, and when the scanning advances by m, the inside of the partial scanning region 2 is scanned, and the data 13 scanned 12 by the data n is controlled in a modulation control part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to an optical scanning system9, and more particularly to an optical scanning system that realizes wide-area optical scanning by dividing a scanning area into a plurality of partial scanning areas. (2) Conventional technology and problems optical scanning! ! ! For example, the laser beam of the jt source l used in printing equipment, etc. as shown in Fig.
The light is reflected by the photosensitive element medium 4 through the imaging lens 3, and a latent image is formed on the photosensitive element medium 4. After that, the exposed light is developed. Transfer to top paper,
It is fixed and output. Incidentally, the photosensitive confectionery medium 4 and the rotating shaft rfi-2 are both rotating. In addition, 5 is one side,
6 indicates the scanning surface 〇 As mentioned above, the optical foot scanning device uses a laser beam from one light source 1 to reflect by one mirror 5 of the rotating polygon 2 to form an image on a wide scanning surface on the photosensitive element medium 4. Since scanning is performed through the lens 3, there is a problem in that the device must become a source of fire when wide area scanning is performed, and therefore it is necessary to downsize the device.

(3) Purpose of the Invention The purpose of the present invention is to reduce the size of the device by dividing the conventional one scanning surface into multiple partial scans, and to reduce the size of the partial scan that touches V#.
*An object of the present invention is to provide an optical scanning system that does not blur the eyes. It has N incident light sources, N plane mirrors that reflect the reflected light from each mirror surface onto the same scanning line, and N imaging optical systems that image the reflected light onto the scanning line, and has a total scanning width. In an optical scanning method in which each partial scanning area is divided into N, and N reflected lights from each mirror surface scan different N partial scanning areas, when scanning each of the partial scanning areas, there is no optical overload. To provide an optical scanning method characterized in that an overlap area is provided, the overlap area is used as a boundary area, and an operation of randomly setting boundary points of adjacent partial scans within the cough boundary area is inserted. (5) Examples of the Invention Examples of the present invention will be described below with reference to the drawings.

Figure 1g2 is a flat diagram showing an embodiment of the wide-area optical scanning device of the present invention.

In the figure, a light source (laser diode) 7 is placed on the same plane.
-1.7-2 are provided, and the rotating multi-sided piece 8 is the same as the conventional one.
The imaging optical system 9, flat wj, lO, etc. are all 21al.
The respective optical scanning planes are connected to complete scanning.

The light emitted from the laser diode 7-1, 7-2 is deflected in the rotational direction by the rotating polygon mirror 8, and
, and the total scanning area by 1,000 mm 10, respectively.
It is reflected within the divided areas (S scanning area (2), partial scanning area (2)) and forms an image. Usually all partial scans are carried out simultaneously, so that the entire scan area 6 is scanned. That is, light source 7
-1 and the mirror surface f. The partial scanning region (2) by the light source 7-2 and the mirror surface f.2 is simultaneously scanned. In addition to this, the same mirror surface can also be used for can part scanning.

By configuring as described above, the j1 device can be reduced to /J%. However, if the boundary point temperature of each partial scan is kept constant (the number of data included in each partial scan 111 area is constant), W in the 1111 boundary area as shown in the jIs diagram (IJ)
J#I&sama is formed, and the irregularities in the seams become noticeable.

Each part -
When scanning a scanning area, an optical overlap area as shown in FIG. 43(b) is provided, the overlap area is used as a boundary area, and boundary points for partial scanning are randomly set within the boundary area. .

According to this embodiment, a table 1 stores the distance m from the reference point to the boundary point when a boundary point is randomly selected within the boundary area, and a table stores the number n of data in the partial area. 2 is prepared in advance, and data modulation control is performed using a control circuit as shown in FIG.

There are blue partial scanning areas ■ and ■, and when the line start approval signal is received, the partial scanning area ■ becomes 7Ii with the start signal from the 2-instant signal generator 41! When the scanning is completed and the reference point is reached, Table 1 is referred to, and when the distance @ m is reached, scanning of the partial scanning area ■ is started, only data n (r 1-adjustable counter 12) is scanned, and 9 data (address generation $ 13) is controlled by the variable i, # control section 14.

As described above, the table 112 for randomizing the boundary points within the boundary area is stored in the memory, and by using them, the spatial frequency in the boundary area of each partial run l can be increased. This makes it possible to suppress apparent disturbances at the joints of each partial scan.

In the above embodiment, the number of surfaces of the rotating polygon mirror is 10 and two different surfaces are used. However, the invention is not limited to this. It has a similar effect.

(6) Effects of the Invention As explained in detail above, according to the present invention, the scanning plane is divided into several partial scans to simplify the device, and the ls
By setting the boundary points of adjacent partial scans twice within the boundary area, the effect of providing an optical scanning method that easily corrects the disturbance at the seam of each partial scan is very effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view to illustrate the conventional advance 3I device;
Gen. 2 Diagram for explaining one embodiment of the present invention - Figure 38 is a rounded diagram for explaining the joint of the partial scanning area of the present invention) When the boundary point is fixed, (b) is #t When the points are set randomly, Figure 184 shows the control circuit push factor of this JI4 light.In the figure, 6 is the scanning plane, 7-
1, 7-2 is a light source, 8 is a rotating polygon, 9 is an imaging optical system,
IO is a plane mirror, 11 is a line start signal generator, 12
13 is an address generation section, and 14 is a #'i modulation control section.

Claims (1)

[Claims] One rotary multi-wheel beam, N light sources that enter light into N different mirror surfaces, N plane mirrors that reflect the reflected light from each mirror onto four scanning lines, and the reflected light is scanned. It has N imaging optical systems that form an image on a line, each partial area obtained by dividing the total scanning width into N is set as a partial scanning area, and N reflected lights from each fIk plane are divided into N different areas. In an optical scanning method that scans a partial scanning area, when scanning each of the partial scanning areas, an optical overlap area is provided, the overlapping area is defined as a boundary area, and l! An optical scanning method characterized in that an operation for randomly setting boundary points of adjacent partial scans is inserted.