JPS59226319A - Focusing optical device - Google Patents

Abstract

PURPOSE:To hold the precision of a product uniform by forming one optical element array with plural optical element blocks which are connected in its arrangement direction. CONSTITUTION:A plastic lens array 2 and a plastic roof mirror array 3 are arranged with a light shielding plate 4, which intercepts lights from individual adjacent lens elements and condenses a luminous flux, between them in a housing 1. In the front of the lens array 2, a right-angled plane mirror 5 for dividing an optical path is held by a holder 6 attached to the housing 1. Cover glasses 7 and 8 are provided in apertures between the housing 1 and the holder 6 above and under the right-angled mirror 5 respectively, and a light shielding paper 9 is provided in the apex part of the right-angled mirror 5, and an aperture stop 10 is provided in front of the lens array 2, and the light from an object 11 is reflected on the upper reflective face of the right-angled mirror 5 and is reflected to the roof mirror array 3 through the lens array 2 and is reflected on the lower reflective face of the right-angled mirror 5 through the lens array 2 again and passes through the cover glass 8 to form an unmagnification erect actual image 12 on an image surface.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to an imaging optical device used in a copying machine, a facsimile machine, etc. Tie 1 layered through
The present invention relates to an imaging optical device.

(Prior art) As an example of such an imaging optical device, for example,
9-8893, etc.'' Also, at least two lens arrays in which a large number of lens elements are arranged in rows are stacked, and a large number σ) lens array as shown in Japanese Patent Application Laid-Open No. 57-37325, etc. It is known that a prism array or a roof mirror array in which a large number of prism elements or roof mirror array elements are arranged in a row are stacked on top of each other. Kowara's M-image optical system not only has a compact device with a focal length of 1ζ, but also a lens array etc. can be molded using the Norastinok material phase, making it inexpensive to produce in large quantities. It has the advantage of being able to do a lot of things.

When such an arrangement is used in a copying machine (v'Q) and an exposure apparatus, it is necessary to install imaging devices of different sizes in conjunction with copying machines having different copying sizes θ).

To do this, it is necessary to prepare many types of molding molds, and it is difficult to mold different optical parts. As a result, the power of incidental equipment and equipment will be increased due to 1), and furthermore, the production volume of the same optical components will be relatively small, so the mass production effect in terms of cost will decrease. Furthermore, when molding long optical parts, there is also the problem that it becomes difficult to maintain a uniform angle of 166 degrees over the entire product.

(Object of the Invention) Therefore, an object of the present invention is to provide an improved imaging optical device that can maintain mass production efficiency and maintain uniform product precision.

The above objects of the present invention are achieved by constructing at least one optical element array by connecting a plurality of optical element blocks in the column direction.

Hereinafter, the configuration of the present invention will be explained with reference to the accompanying drawings.

(Structure of the Invention) Fig. 1 does not show an example of a vaginal ζ-image optical device to which the present invention is applicable. In the interior 11C of the housing 1, a glass lens array 2 and a glass roof mirror array 3 are arranged with a light shielding plate 4 interposed therebetween for shielding adjacent lens elements from each other and focusing the light beam. In front of the lens array 2, a right-angled plane mirror 5 for splitting the optical path is held in a holder 6 attached to the housing l.

In the opening between the housing 1 and the holder 6 above and below the right-angle mirror 5, cover glasses 7 and 8 are installed. An aperture diaphragm lO is fidgetily installed at the front of the lens array 2.Each component extends in a direction perpendicular to the plane of the paper in which this figure is shown.Object 11
The light enters from the cover glass 7, is reflected by the upper reflective surface of the right-angle mirror 5, passes through the lens array 2, is reflected to the roof mirror array 3, and passes through the lens array 2 again to the curved mirror 5. It is reflected by the lower reflective surface, and the cover glass 8
A true erect real image 12 of equal size is formed on the image plane.

The present invention provides one such optical component σ), e.g.
As shown in the figure, the roof mirror array 3 is connected to a short block 3.
The special feature is that a Dano mirror array 3 of any length can be constructed by connecting the stiffeners in the column direction. What is made into a block is not limited to the Dano mirror array 3, but other optical parts such as the lens array 2, or the entire assembly housed in the housing l as shown in Figure 1 may be made into a block. When forming blocks, it is preferable to keep the length in the column direction σ) short in order to avoid cumulative errors caused by concatenation.

To assemble the roof mirror array block 31 to the knowing 1, the roof mirror array block 31σ) both side plates 3
2.
It is easy to slide into the groove 34 provided on the opposite side,
And it is easy to achieve positional accuracy. In addition, there are positioning pins 3 on the upper surface of both side plates 32σ) of the Dano mirror array block 31.
5 is provided, and a positioning pin 35 as shown in Fig. 3 is provided on the bottom surface of the lens array 2.
By fitting the first and second bottles 35 into the positioning holes 36 provided on the light-shielding side 4, it is possible to easily and precisely align the lens array 2, the light-shielding side 4, and the Dano mirror array block 31 (θ). Waru. Similarly, a positioning pin 37 is provided on the top surface of the lens array 2, and a positioning hole is also provided for the aperture diaphragm tU (see Fig. 1) VC to be placed over this, and by fitting the two, the lens array 2 and the aperture diaphragm I
The assembly with O can be done easily and neatly.

(Effects of the Invention) As described above, according to the honor imaging device of the present invention, by using long optical components in blocks, high precision and uniform quality can be achieved by miniaturizing the honor components. There are benefits such as cost reduction and simplification of production equipment due to increased production quantity σ) using a single mold.

[Brief explanation of drawings]

Fig. εj-1 is a longitudinal view showing an example of the connecting part (3) to which the present invention is applied; teeth,
Q) It is a perspective view of a lens array, a light shielding member, and a Dunno mirror array in an actual example of the invention. l...Housing, 2...Sh/Guarei 1. (...
Mirror mirror array, 4... Light blocking member, 5... Right angle mirror, 6... Boulder 17, 8... Cover glass, 9... Light blocking paper, io... Aperture stop, 11. Object ,
12. Slag, 31゛° Dano mirror array block

Claims (1)

[Claims] (8) An optical device in which at least one optical element array is connected in the column direction. A structure consisting of optical element blocks □
□□Optical equipment P゛・′.