JPS5952225A - Projector - Google Patents

Abstract

PURPOSE:To project a unmagnification image and a variable power image through simple constitution by arranging lens array optical systems for unmagnification projection and variable power projection and using one of those optical systems selectively through a shutter mechanism. CONSTITUTION:When titled projector is applied to an electrophotographic copying machine, the lens array optical system 13 for unmagnification image projection and lens array optical system 14 for variable power image projection are arranged in order and a shutter plate 15 which moves in both directions shown by an arrow (d) selectively is provided between those optical systems 13 and 14 and a platen; and an opening 16 which signifies the optical path of only one optical system is formed according to the movement of the shutter plate. The optical system 13 consists of a known lens array 17 and the optical system 14, on the other hand, consists of a lens array 17 and luminous flux deflecting plates 18 and 19 arranged on both its end surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a projection device capable of selectively projecting a constant-magnification image and a variable-magnification image.

Such a projection device is applied, for example, to an electronic copying machine, but such a conventional copying machine capable of full-size copying and variable magnification copying is larger than an IF machine that can only make full-size copying. Moreover, it has the disadvantage of being complicated.

The projection device g applied to a multiplex machine will be briefly described below.

FIG. 1A shows the principle of a scanning exposure device for document images using a conventionally known spherical lens. An image of a band-shaped area extending over the area is projected onto a drum-shaped or belt-shaped photoreceptor 4 that moves once in the direction of arrow a, using a projection lens 3 that fits within a spherical 1° lens, and is exposed to light. In this case, the scanning exposure of the original is performed by the illumination device 2 and the projection lens 3.
Either move the document table l in the direction of the arrow while fixing the photoconductor 4, or move the document table 1 in the direction indicated by the arrow.
Either fix it and move the projection lens 3 in the direction of arrow C, or
Alternatively, this can be done by arranging a scanning mirror and moving it and the projection lens.

FIG. 1B shows an exposure device that selectively projects a full-sized image and a reduced image, and the same reference numerals as those shown in 11 mA represent those having the same function. In Fig. 1B, when projecting a life-size image, the document table 1 and the projection lens 3 are arranged at five positions shown by the solid line, but when projecting a reduced image, the projection lens 3 is placed at the position shown by the broken line. At the same time, the optical path length is corrected by combining reflecting mirrors and the like so that the position of the original 474 unit 1 becomes the position shown by the broken line under equal constraints. In this way, the projection lens 8 is
1 [(8) Projection when shared for projection of images and variable magnification images.

Since the lens 3, the reflecting mirror, etc. need to be movably arranged, there is a drawback that the device becomes bulky and complicated.

Figure 1C shows an example of a pond in an exposure device that projects a 1-magnification image, and is known as a SELFOC lens array (product name: manufactured by Nippon Sheet Glass Co., Ltd.) between the document table l and the photoreceptor 4. A lens array 5 such as a gradient index rod lens array or an erect orthogonal image projection lens system constructed by combining small-diameter spherical lenses in multiple stages, or a 1° microlens array is arranged. . If such a lens array 5 is used, the exposure device can be significantly downsized and simplified. For example, when a SELFOC lens array is used, the distance between the document table 1 and the photoreceptor 4 is 1'f:5.
0~89I! It can be set to II.

The above has explained the projection device applied to the copying machine, but as is clear from the above explanation, in order to make the exposure device smaller and simpler, it is necessary to use a selfoc lens array or the like as shown in Figure 1C. It is preferable to use a lens array such as a micro lens or a 5° (4) diagonal array.

However, such a lens array uses a plurality of erect orthogonal image projection lens systems in parallel to form a projection image with a wide image width that cannot be covered by a single lens system. 6 projection, the images projected by the shadow lens system overlap without any deviation and a good projection image is obtained, but when projecting a variable magnification image of a reduced or enlarged image, the object distance and image distance are simply changed. If you do this alone, the overlapping of each projection image will shift and you will not be able to obtain a good projection image.

It was used for projection purposes.

FIGS. 2A and 2B show how a projected image is formed by such a lens array.

Figure 2A shows the same magnification erect orthogonal image projection lens system Lat LbI
The imaging situation is shown when 15 lenses such as Lo are arranged in parallel so that their optical axes are parallel, and x and x' are the projection lens system L.
The optical axis of a, y and yl are the projection lens system. The optical axes of each are shown. 01 is a document whose front and rear ends are in contact with the optical axis Xe'l. 4 is a projected image of the original 0□ by the projection lens thread La, and the tip of the original 0□, which is located at least 2 degrees on the optical axis X, is also on the optical axis x' in the projected image 1□.

The rear end of the original O□, which is located above and is in contact with the optical axis y, is also on the optical axis y' in the projected image I0 because it is a normal-sized image. Projection lens system. Projection image processing by □' is original 0□
The rear end of the lens is in contact with the optical axis y, so it is thrown.

The rear end of the imager' is in contact with the optical axis y', and since it is a life-sized image, the leading edge of the original 0□ is in contact with the optical axis X'. In other words, since the projection images, ' and ', are formed at the same position, they are recognized as a single image even if they are superimposed.

On the other hand, FIG. 2B shows a situation in which a 1.1-reduced image is projected using a similar lens array, but in this case, the original O2
is arranged at a position farther from the document-side end surface of the projection lens system La@LC than in FIG. It will be done. The tip of 1°1140, which is in contact with the optical axis X, is a projection image processing by a projection lens thread La.

In this case, the rear end of the document 0, which is in contact with the optical axis X' and the optical axis y, is a projection lens system. The projection imager 2I also touches the optical axis y'. However, since the image projection magnification is a reduced image of 1 or less, the projection lens system La, .

The projection images 21 and 2' due to Lo do not overlap as shown in the figure, and a normal reduced image is not formed. Such a problem also occurs when an enlarged projection image of an erected normal image is obtained, and as shown here, the maximum document width cannot be covered alone.

When using a lens array consisting of multiple erect orthogonal image projection lens systems arranged in parallel so that their optical axes are parallel to each other, even if a same-size erect orthogonal image can be formed normally,
A variable magnification erect orthogonal projection image cannot be formed normally as it is. For this reason, conventionally a variable magnification optical image projector has been configured using a set of spherical lenses that cover the entire 1.1 screen, but this device has the drawbacks of being cumbersome and large in size. was there.

The object of the invention is to eliminate the above-mentioned drawbacks and to provide a projection device appropriately constructed and arranged so as to be able to selectively project a 1° full-magnification image and a variable-magnification image with a simple and compact configuration. .

The uninvented projection device projects a life-sized image of an object on the object plane onto the image-receiving surface between a predetermined object plane and the image-receiving surface.

(7) A lens array optical system for projecting a 1-magnification image and a lens array optical system for projecting a variable-magnification image that projects a variable-magnification image 1 are arranged side by side, and only one optical path of these optical systems is opened. A shutter mechanism is provided that selectively opens and closes the pond to close off the object.

The present invention is characterized in that it is configured such that a same-magnification image and a variable-magnification image thereof can be selectively projected onto the image-receiving surface by illuminating the image with an illumination device.

The present invention'f will be described in detail below with reference to the drawings.

FIGS. 8A, B, and C show 1. .

2 is a diagram for explaining the principle of a variable magnification image projection lens array optical system, in which La and Lo indicate an erect orthogonal image projection lens system similar to that in FIG. 2, and the respective optical axes are x and x.
' and y* denoted as 'J'. p and p' are light beam deflecting elements, and in the illustrated example, a prism is used and the angle is 1°.

These prisms p and p'' are a projection lens system.

is placed close to the end face of the lens, and acts to tilt the optical axis at a predetermined angle. 02 indicates a document, the leading and trailing ends of which are in contact with the optical axes X and y, respectively. In the eighth tfflA, the prisms p and p' are projected into lenses .

(8) Zu-kei Ri. are placed close to each end face of the 1. Here, the projection of the original 02 by the projection lens system La has its tip in contact with the optical axis X', and its length is determined by the projection reduction ratio. Further, the rear end of the original O3 is in contact with the optical axis y of the projection lens system L0.

From this projection lens system. The rear end of ' is in contact with the optical axis y' and its length is the projection lens system La
It becomes the same as the projection guard formed by. Therefore, if the angle or refractive index of prisms p and p' are selected so that each projection mirror, prism, and prism overlap by 1 degree, a normal reduced projection image with no shift in image weight can be obtained. Obtainable. For the enlarged image, see Figure 8A.
If we consider the projection image 2 as an original and the original O3 as a projected image, they can be obtained using exactly the same principle.

In Figure 8A, the projection lens system is shown. Although the light beam deflection elements p and p' are interposed on both the document side and the projection image side, the light beam deflection element p or p' is provided only on one side of the projection lens thread I7o, as shown in the 8th dB and C, respectively. Even with the intervention, it is possible to obtain image 1, a variable magnification projection image with no shift in image weight, as in FIG. 3A.

Wear. That is, in FIG. 8B, the length of the projection lens system (Selfoc lens) Lal Lo is lengthened by ΔL on the lla image side to create a reduced image, and the luminous flux of the lens Lo is changed by the prism P'. Deflect the lens La. Each reduced image 1 by
．． and ■, I are made to overlap. In addition, in FIG. 3C, as explained in FIG. 1C, the lengths of the SELFOC lenses La and Lo are set to ΔL1. .

In addition, the document position is moved further away to form a reduced image of the document 0□, and a prism p is placed on the document side end surface of the SELFOC lens L0, so that the image I,' projected by the lens L0 is changed to the image I,' projected by the lens La. It is structured so that it overlaps with projection maintenance. 1-.

FIG. 4 is a diagram showing the configuration of an example of a variable magnification image projection lens array optical system used in the inventive projection apparatus based on the principle explained in FIG. 8. In Fig. 4, La*...
..., L□, ...t Ln is an individual erect orthogonal image projection lens system in which the optical axes are parallel.

They are arranged in parallel to form a SELFOC, a lens array, or a microlens array L. p and p' are light beam deflection plates, and in this example, a prism plate constructed by arranging a large number of prisms is used. The angle of each prism is shown in Figure 8.

In order to satisfy the conditions explained above, each lens 1'-La
+..., each one is arranged corresponding to Ln. 0 indicates the original, ■ indicates the projected image, and X indicates the projected image.

V + Z e V # W and x', y', z
', v', w' are each 1゜''series/' L/+
The optical axis of 8 f Ll+61 L/+9 e Ln is shown.

The distance between the central lens system Ln and the outermost lens system Ln is 11, and the length e/ is the intersection of the optical axis W of Ln and the optical axis X of Ln. , the length connecting the point where the optical axis W' of 15Ln and the optical axis X' of 15Ln intersect with the image plane is t.
Let i be 1o-1-1,,l-11-1b. The projection magnification is ti/lo, the inclination of the optical axis of the outermost lens system Ln is α and β, and the vertical distance from the light beam deflection plates p and p to the document surface and the image surface is curved (11). Let h and hl be tanα-ta/h, respectively.

tanβ-1b/h'. The smaller α and β are, the easier it is to manufacture the prism, and the occurrence of various aberrations due to bending of the optical axis can be suppressed, which is advantageous. In order to reduce α and β, h and tb may be made small, or h and h' may be made large. The larger the enlargement or reduction ratio of the projected image, the larger the document screen width t. As ta and lb become larger, it becomes larger, so it is preferable to set the lens system so that h and h' are as large as possible when ta and lb are large.

The light beam deflecting plates p and p' are aggregates of minute prisms, and can be commercially manufactured by molding optical materials such as plastic and glass. Examples of optical plastic materials that can be used include styrene resin, methyl methacrylate, cyclohexyl methacrylate, allyl diglycol carbonate, etc., with methyl methacrylate and cyclohexyl methacrylate being particularly superior as materials with little chromatic aberration. .

612) As the molding method, a casting molding method, a compression molding method, an injection molding method, etc. can be applied. With regard to optical glass, recent technological advances have made it possible to obtain processing precision comparable to conventional polishing methods through molding, and there is also a track record of commercialization of the above-mentioned light beam deflection method.

Applicable as a board. As can be understood from the description of FIGS. 8B and 8, the present invention can be implemented using only one of the light beam deflection plates ptp'. In this case, the angle α is required to obtain the same magnification compared to FIG.
Or, since β is about twice the value, it is 0, so if the magnification ratio is small or the effective screen width is small, and h and h' are long, α,
It can be put into practical use suitably when the value of β is small.

If the individual lens systems of SELFOC lenses or microlenses are arrayed in a row, it is possible to construct a prism without considering the thickness of the array. When a row of lens systems is arranged, and the distance between them becomes wider, the overlapping images of the lens systems arranged in the thickness direction of the array will shift, resulting in resolution deterioration.

stir up This deterioration can be prevented by the same method as the method for correcting the deviation of the overlapping images by the lens systems arranged in the longitudinal direction 1 of the array described above. That is, as shown in FIGS. 5A and 5B, two rows of array LL-
1, L-2, the light beam deflecting plates p and p' may be configured to have a deflecting action in the length direction and thickness direction of the array so that the reduced images of each array coincide. In this case, the effects of the light beam polarizing plates p and p', and the relationship between the positions and sizes of the original 0□ and the projected image I are shown in Figure 3.
First,.

Since the explanation of FIG. 4 can be applied as is, the explanation will be omitted.

In the explanations of FIGS. 3, 4, and 5, Selfoc lens arrays or microlens arrays are arranged at intervals, and one prism is arranged 1° for each lens system. However, in such an arrangement, the distance between adjacent lens systems cannot be sufficiently narrowed because each lens system and prism correspond one-to-one, and therefore sufficient brightness cannot be obtained from the lens array as a whole. 1.7° There is a problem that it is difficult to move.

FIG. 6A is a diagram showing a close-packed arrangement that has been put to practical use in order to obtain the maximum amount of light in a cell 7 oxygen lens array. This kind of intertwined lens arrangement or Selfoc lens.

It is not necessarily easy to create all the prisms to accommodate lenses with a diameter of approximately 1 am. In such a case, as shown in No. 6 IN B, instead of the prism, for example, a cylinder having a curved cross-sectional shape spanning the plurality of lenses constituting the lens array L is used.

It is sufficient to arrange divided light beam deflecting plates S and S' in the shape of a trical lens or a Fresnel lens. In addition, when a lens array is constructed by arranging about two rows of A/7 lenses each having a diameter of about 1 inch, the deviation in the overlap of images (5) due to the lens arrangement in the thickness direction of the lens array can be ignored; When the number of lenses arranged in the horizontal direction increases, or when lenses with large diameters are used, the overlapping deviation cannot be ignored. In such a case, as shown in the sixth dO, a lens array L is used as the light beam deflection plates F and F'.
Thickness 11 (15) It is sufficient to use a Fresnel lens having a curvature also in the width direction to correct the deviation of image overlap in the width direction of the lens array L.

(16) FIG. 7 is a one-line diagram showing the configuration of an example of the projection device of the present invention, which is applied to an electrophotographic copying machine. In this example, a lens array optical system 18 for projecting an equal-magnification image and a lens array optical system 14 for projecting a reduced image are arranged side by side between the document table 11 and the photosensitive drum 12, and these lens array optical systems 18° A shutter plate 15 is provided between the document table 11 and the document table 11, and the shutter plate 15 is selectively moved in the direction indicated by the double-headed arrow d by a driving means (not shown). .

- Forming an aperture 16 that opens the optical path of the optical system.

The same-magnification image projection lens array optical system 18 is constituted by a lens array 17 such as a conventionally known SELFOC lens array or microlens array, and the reduced image projection lens array optical system 14 is composed of a thin 15's array 17 and its both end surfaces. It is constructed with light beam deflection plates 18 and 19 arranged on the side. In this example, the document placed on the document table 11 is transported in the direction shown by the arrow e, and the document is illuminated by 2 degrees by the lighting device 2o while the photosensitive drum 12 is rotated in the direction shown by the arrow f. , the image is IJPI on the shutter plate 15
By projecting onto the photosensitive drum 12 through the aperture 116 and the lens array optical system facing the aperture 116, the same-magnification image and the reduced image are selectively scanned and exposed. Incidentally, the illumination device 20 includes a fluorescent lamp 21 and a fluorescent lamp 21 emitted from the fluorescent lamp 21.

The fluorescent lamp 21 includes a reflecting mirror 22 for effectively guiding the light emitted to the document surface, and the fluorescent lamp 21 is formed with an output opening 28 and a reflecting portion 24 shown with diagonal lines to direct illumination light to the document surface. In FIG. 7, the aperture 16 of the shutter plate 15 faces the optical path of the lens array optical system 18 for projecting a 1-magnification image.
In this state, a same-size image can be projected onto the photosensitive drum 12. In addition, the shutter plate 15 is shifted to the left in the figure so that its opening 16 faces the optical path of the reduced image projection lens array optical system 14, and the optical path of the same-magnification image projection lens array optical system 18 is closed to the shutter plate 15. Board 15
By closing it, a reduced image can be projected.

In this way, if the 1% lens array optics 13 and 14 are used to project the same-magnification image and the reduced image, and these are selected by the shutter plate 15,
The apparatus can be made smaller and simpler, and it is also possible to easily select between a full size image and a reduced size image. In addition, instead of moving one optical system in response to changes in projection magnification and correcting the optical path length as in the past, each lens array optical system is fixed, making it easier to achieve positional accuracy. This has the advantage of simplifying the configuration. Furthermore, in the past, it took time to move mirrors and lenses when changing the magnification, and during that time the copying process
Although it was necessary to interrupt step 1 and wait, this embodiment has the advantage that the magnification can be changed easily and can be completed in a short time. Note that as the magnification changes, it is necessary to change the start timing and scanning speed of document scanning in order to align the leading edge of the copied image and the leading edge of the original. It may be determined based on the position where the optical axes of the systems 13 and 14 intersect the original surface of the original platen 11 and the photosensitive drum 12, the original scanning start position, and the scanning scan rate.

FIG. 8 shows the configuration of another example of the projection device of the present invention!・：・
FIG. In this example, the same-magnification image projection lenses are also arranged side by side, and the illumination device 20 is connected to the shutter plate 1.
．． The seventh point is that 5G is installed and moved as one.
It is different from the illustration. The enlarged image projection lens array optical system 25 is similar to the reduced image projection lens array optical system 14,
It is composed of a lens array 17 and light beam deflecting plates 18 and 19 arranged on both end surfaces thereof. With this configuration, it is possible to selectively scan and expose the reduced image and the enlarged image of the 14-magnification image 14, and the opening 16 of the shutter plate 15 can efficiently cover the portion of the document table corresponding to the lens array optical system that is opposed to it. can be illuminated. Note that the optical axes of the lens array optical systems 14 and 25 for reducing and enlarging images are tilted with respect to the optical axis of the lens array optical system 3 for projecting a same-magnification image, as shown in the figure. This is to obtain the best image formation using a lens array optical system when and the image receiving surface are not parallel planes, and this condition can be satisfied when γ-γ' and δ-δ'.

FIG. 9 is a diagram showing the configuration of still another example of the projection apparatus of the present invention. This example differs from that shown in FIG. 8 in that a reduced image and an expanded image can be selectively projected by one variable magnification image projection lens array optical system 26. The variable magnification image projection lens array optical system 26 includes a lens array 17 and light flux deflecting plates 1s* arranged on both end surfaces thereof, similarly to the lens array optical systems 16 and 25 for reducing and enlarging image projection shown in FIG. In this example, the lens array optical system 26 is provided so as to be rotatable around the optical midpoint 0 of the optical path connecting the document table 11 and the photosensitive drum 12. When it is at the solid line position, the projection imaging condition for the reduced image is satisfied, and when it is rotated half a turn around the intermediate point 01) to the position shown by the imaginary line as shown by the arrow, the projection imaging condition for the enlarged image is satisfied. Make sure to satisfy the following. With this configuration, a reduced image and an enlarged image can be selectively projected by one variable magnification image projection lens array optical system 26, so the apparatus can be made even smaller by 2.0 mm compared to FIG. 8.

can. Further, since the selection l of projection of a reduced image and an enlarged image can be made by rotating the lens array optical system 26 by half a rotation as required, there is an advantage that the configuration can be simplified and positional accuracy can be easily achieved.

Note that the present invention is not limited to the above-mentioned example, but can be modified or changed in many ways.

For example, in FIG. 7, the illumination device 20 is connected to the shutter plate ■
It is also possible to construct such a structure that a portion of the document table corresponding to the lens array optical system that is moved together with the document plate 5 is efficiently illuminated. In addition, when moving the lighting device 20 in this way, the lighting device 2o is not provided integrally with the shutter plate 15, but is moved in conjunction with the lighting device 2o based on a signal for moving the shutter plate 15. Furthermore, without moving the entire lighting device 20,
For example, only the reflecting mirror 22 may be moved in conjunction with the shutter plate 15. Even in this case, it is sufficiently effective to obtain the necessary amount of light, and in this case, the fluorescent lamp 21 can be fixedly installed, but the illumination system can be easily moved. Further, in the above-described embodiment, the shutter plate I5 is formed by a wide plate-like member having a part of the opening I6, but it is also possible to use a shutter plate divided into shapes corresponding to the respective G of each lens array optical system. . Furthermore, the light beam deflection plate may be arranged only on either the incident end side or the outgoing end side of the lens 2'' (23) array, and its deflection effect may be different from that at one end of the lens array. It is also possible to construct a structure in which there is no difference, and the number increases sequentially from one end toward the other end. Furthermore, the lens length can be sequentially shortened on one side or both sides in accordance with the deflection action of the light beam deflection plate, thereby correcting deviations in imaging conditions due to the deflection action. Furthermore, as mentioned above, when a light beam deflection plate is used, its chromatic aberration deteriorates the resolution when reproducing a black and white image, and when reproducing a color image 1, there is a problem that color shift occurs. In order to solve this problem, it is also possible to provide the lens array with chromatic aberration so as to correct the chromatic aberration of the light beam deflection plate.

In this case, for example, each lens system constituting the lens array may have a chromatic aberration that corrects the chromatic aberration of the corresponding light beam deflection plate, or the light beam deflection plate may be placed in the center of the lens array. In all lens systems, there is no deflection effect from the center to the end (if the deflection effect increases sequentially from the center to the edge, a lens array is constructed.) The lens system C located approximately midway between the central part and the end part 1 may be provided with chromatic aberration to correct the chromatic aberration of the light beam deflection plate, or the lens array may be provided with n lenses between the center part and the end part. (n≧2
) as a group, all the len of each group.

It can be constructed by providing the lens system with a chromatic aberration that corrects the chromatic aberration of the light beam deflection plate corresponding to the lens thread located approximately in the middle of the group.

In addition, as a method for imparting chromatic aberration to a lens array, for example, when a SELFOC lens is used, the refractive index and Atsube number in the radial direction of the lens are controlled by selecting ions, and microlenses are used. When used, a desired chromatic aberration can be easily provided by controlling the refractive index and Abbe's number of a plurality of lenses constituting one projection optical system.

As described above, in the present invention, a lens array optical system for projecting a 1-magnification image and a lens array optical system for projecting a variable-magnification image are used, and these are selected by a shutter mechanism.・Easy to use (as well as the selection of 1-magnification and variable-magnification images).

The selection can be made easily and quickly. In addition, by moving part or all of the illumination device depending on the selection of the lens array optical system for equal-magnification image projection and the lens array optical system for variable-magnification image projection, sufficient light intensity can be obtained when projecting each image. be able to. Furthermore, by making one variable magnification image projection lens array optical system rotatable, a reduced image and an enlarged image can be selectively projected with a small and simple configuration.

[Brief explanation of the drawing]

Fig. 1A-113 is a diagram showing eight examples of projection devices applied to copying machines, and Fig. 21iJA and B show forms of projection image formation by a lens array in which a plurality of erect orthogonal image projection lens systems are arranged. Figures 8A, B, and C are diagrams for explaining the principle of the lens array optical system for variable magnification image projection used in the projection device of the present invention. A diagram showing the configuration of an example of a variable magnification image projection lens array optical system to be used. 5 and B similarly show the configuration of another example; FIG. 6 A, B, and C are diagrams for explaining the configuration of still another example; and FIG. 7 is a projection of the present invention. The configuration of an example of the device is shown. FIG. 8 is a diagram showing the configuration of another example, and FIG. 9 is a diagram showing the configuration of still another example. 11...Original table ■2...Photosensitive drum 13...Lens array optical system for projecting a same-size image 11...Lens array optical system for projecting a reduced image 15
...Shutter plate 16 ...Aperture 17
. . . Lens array ts, 19 . . . Luminous flux deflection plate 20 . Enlarged image projection lens array optical system 26
...Lens array optical system for variable magnification image projection. Figure 3 Figure 4 Figure 5 Figure 8

Claims (1)

[Claims] L゛ A lens array optical system for projecting a 1-magnification image of an object on the object plane onto the image-receiving plane between a predetermined object plane and an image-receiving plane; A lens array optical system for projecting a variable magnification image to be projected is provided side by side, and a shutter mechanism is provided for selectively opening and closing the optical paths of these optical systems so as to open only one optical path and close the optical path of the Noh. ．． . A projection device characterized in that the object is illuminated by an illumination device and a constant-magnification image and a variable-magnification image of the object can be selectively projected onto the image receiving surface. Tortoise In conjunction with the operation of the shutter mechanism, the optical path 1-. A special iFF characterized in that part or all of the illumination device is configured to be movable so as to efficiently illuminate an object portion on the object surface corresponding to an optical system that is opened.
A projection device according to claim 1. & The lens array optical system for variable magnification image projection is in front. It is configured to be rotatable around the center of the optical path connecting the recording object surface and the image receiving surface, and to selectively project a reduced image and an enlarged image by selectively rotating the optical path by half a rotation. A projection device BL according to claim 1 or 2, characterized in that: