JPS6330066A - Picture reader - Google Patents

Abstract

PURPOSE:To improve operability with compact constitution by arranging a projecting system of a film picture near a picture read means and providing also a mirror forming an image of a film picture onto an original platen so as to project the film picture onto a scanning mirror. CONSTITUTION:In reading a reflected original, a lighting lamp 8 lights an original 15 and its reflected light onto a photodetector array 13 via mirrors 9-11 and a lens 12. The lighting lamp 8 and the mirrors 9-11 are moved in a direction of arrow to scan the original 15. In reading the film picture, the scanning mirrors 9-11 are stopped at the position of a Fresnel mirror 19. Then the light radiated from the projecting light source 2 transmits through the lens 3, lights the film 4 and the image is formed onto the Fresnel mirror 19 via the projecting lens 5 and the mirrors 11-9. The Fresnel mirror 19 is arranged to collect the light through the lens 12. The film image formed onto the Fresnel mirror 19 is reflected onto the Fresnel mirror 19 and formed again on the photodetector array 13 via the mirrors 9-11 and the lens 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The unpublished IJJ relates to an image reading device that projects an image of a document or a film image and reads it with an image reading means.

(Prior Art) Conventionally, as this type of device, there is one as shown in FIG. 8, for example. In such a conventional example, when reading an image of a document, place the document with the image side facing down on the document table glass 114. The illumination lamp 108 illuminates the document, and the reflected light passes through a mirror 109, reflective mirrors 110 and 111 arranged at an angle of 90' to each other, and a lens 112.
The image is formed on the light receiving element array 113 via the light receiving element array 113. The document is scanned using the illumination lamp 108. This is done by scanning the mirror 109 and the reflecting mirrors 110, 111 at a speed of 2:l in the direction of the arrow.

On the other hand, when reading a film image, the film projection unit 100 is placed on the document table 115, and the mirror 1 is
06. A Fresnel lens 107 is placed on a document table glass 114, and light emitted from a projection light source 102 illuminates a film 104 through a lens 103. The light from the illuminated film 104 is transmitted to the projection lens 105. Mirror 106.
The image is projected onto document table glass 114 via Fresnel lens 107 .

(Problems to be Solved by the Invention) However, in such a conventional example, when reading a film image, the film projection unit/) 100 is placed on the document table 115, and the mirror 106. Since the Fresnel lens 107 was positioned on the original platen glass 114h and the film image was projected onto the original platen glass 114h,
When switching between reading an original image and reading a film image, the film projection unit 100. There is a problem in that it takes time and effort to attach and detach the mirror 106 and the Fresnel lens 107, which is unfavorable in terms of algae cultivation and appearance.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to easily switch between reading an original image and reading a film image. An object of the present invention is to provide an image reading device with greatly improved performance.

(L stage for solving problems) In order to achieve the above object, the present invention includes the following steps:
In an image reading device that projects an image of a document with a scanning mirror and reads it with an image reading device, a film image projection system is disposed near the image reading device, and the film is placed on a placing table a on which the document is placed. It is constructed by connecting mirrors for forming an image and projecting and rotating the film image onto the scanning mirror.

(Function) In the present invention having the above configuration, a film image projection system is disposed near the image reading means, and a mirror for forming the film image is connected to the mounting table on which the original is placed. The film image formed on this mirror is projected onto the document scanning mirror so that it can be read by the document image reading means, making it easy to switch between document image reading and film image reading. .

(Example) The present invention will be explained below based on the illustrated example. 1st
Figures (a) and (b) are schematic diagrams showing one embodiment of an image reading device according to the present invention, and Figure 1 (a) shows a case where a reflective original is read. A document 15 is placed on the document table glass 14 with the image surface facing down.

Reference numeral 8 denotes an illumination lamp, and the illumination lamp 8 illuminates the original 15, and the reflected light passes through a mirror 9, reflection mirrors 10 and 11 arranged at an angle of 900 degrees to each other, and an image reading lens 12. Light receiving element array 1 as image reading means
The image is formed on 3. Scanning of the original 15 is performed using an illumination lamp 8.
This is done by scanning the mirror 9 and the reflecting mirror 10.11 at a speed of 2:l in the direction of the arrow. Here, the mirror 99 and the reflecting mirror 10.11 are scanning mirrors that scan the image of the original 15.

On the other hand, when reading a film image, as shown in FIG. 1(b), scanning mirrors (mirror scanning system) 9, 10, and 1
1 stops at the position of the Fresnel mirror 19. 3Then, as shown in FIG. 2, the light emitted from the projection light source 2 passes through the lens 3 and illuminates the film 4, and the light from the illuminated film 4.

Mirror 11 . It is reflected in the order of to and 9, and an image is formed on the Fresnel mirror 19. Fresnel mirror 19 is arranged to focus light onto document reading lens 12 . That is, the Fresnel mirror 19 is connected to the document table glass 1.
It is connected with 5. The film image formed on the Fresnel mirror 19 is reflected by the Fresnel mirror 19, and then imaged onto the light-receiving element array 13 by the document reading lens 12 via the mirrors 9, 10, and 11 again.

Here, when scanning a film image, as shown in FIG.
A rack 17a is cut in the lateral direction, and a binion gear 20 that meshes with this rack 17a is fitted onto the tip of the rotating shaft of the motor 18. When the motor 18 is driven to rotate, the pinion gear 20 rotates, thereby moving the film image f-17 up and down, and as the film holder 17 moves up and down, the film 4 also moves up and down, thereby scanning the film image.

Also, specific examples of Fresnel mirrors are shown in Figure 4 (a) and (b).
). The Fresnel mirror 19a shown in FIG. 5A is a Fresnel mirror whose front surface is a mirror, and the Fresnel mirror 19b shown in FIG.

Other parts that are the same as those in FIG. 2 are given the same reference numerals and their explanations will be omitted.

In the above embodiment, as shown in FIG.
1A2. Lens 3. Although the film projection doublet 16 consisting of the film 4 and the projection lens 5 is arranged side by side in the lateral direction of the original reading lens 12, the present invention is not limited thereto. Accordingly, shortening the length of the image reading device main body in the width direction becomes rotation.

Further, as shown in FIG. 6, when the Fresnel mirror 19 is attached and detached, the Fresnel mirror 19 is removed and copied when a normal copying operation is performed, and when the film projection unit 16 is used, the Fresnel mirror 19 is rotated. The mirror 19 is placed a21 on the document table glass 14 for use. Furthermore, as shown in FIG. 7, when the Fresnel mirror 19 is set to slideable 1 gloss and a normal copying operation is performed, the Fresnel mirror 19 is
9 may be moved to the left side in the figure from the document table glass 14, and when the film projection unit 16 is used, the Fresnel mirror 19 may be moved onto the document table glass 14. In this way, FIGS. The mounting mode of the Fresnel mirror shown in FIG. 7 is one in which the mirror is connected vertically to the document table glass 14, and the Fresnel mirror is connected in the horizontal direction as in the mounting mode of the Fresnel mirror shown in FIG. 1(b). It can be made shorter in the longitudinal direction compared to the existing one.

In the above embodiment, a light receiving element array was used as the image reading means, but a contact type COD (charge coupled device) array may also be used.

Thus, the above embodiment includes the original 15 and the film (negative,
The image of positive) 4 is read by the light receiving element array 13, and a Fresnel mirror 19 is connected to the document table glass 14, and the image reading lens 12 and the light receiving element array 1
A film image projection system is disposed near the film 4, and the original scanning mirror 9.degree. 10.11 is also used for projecting the film 4.

(Effects of the Invention) The image reading device according to the present invention has the above-described configuration and operation, and includes a film image projection system disposed near the image reading means, and a document reading device. ! A mirror that forms the film image is connected to the aX stand that is used for scanning, and the film image is projected onto the scanning mirror that scans the document. This eliminates the need for attachment and detachment, resulting in a compact configuration and significantly improved operability.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1(a) and 1(b) are schematic diagrams showing one embodiment of an image reading device according to the present invention, and FIG. 2 is a schematic diagram showing a film projection system in the same embodiment. Figures 3 and 3 are explanatory diagrams showing the film scanning mechanism in the same embodiment, and Figures 4 (a) and (b).
) is a schematic cross-sectional view of the Fresnel mirror in the same embodiment, and FIG. 5 is a schematic diagram showing another example of the film projection system of FIG.
FIGS. 6 and 7 are schematic diagrams showing other attachment modes of the Fresnel mirror in the same embodiment, and FIG. 8 is a schematic diagram showing a conventional image reading device. Explanation of symbols 2... Projection light source 3... Lens 4... Film 8... Illumination lamp 9.10.11.
... Mirror (scanning mirror) 13 ... Light receiving element array (
Image reading means) 14...Original table glass 15...
Manuscript 16...Film projection unit 19...Fresnel mirror patent applicant Canon Co., Ltd., -; Figure 4 (Q) (b'J

Claims (1)

[Claims] In an image reading device that projects an image of an original using a scanning mirror and reads the image using an image reading means, a film image projection system is disposed near the image reading means, and the film is placed on a mounting table on which the original is placed. An image reading device characterized in that a mirror for forming an image is arranged in series so that the film image can be projected onto the scanning mirror.