DE2939149C2 - Projection copier - Google Patents

Description

without the light rays coming from the mirror 3 migrating out of the reflection area of the mirror 4. In the first-mentioned oblique displacement of the mirror 14, a corresponding speed correction is necessary to undertake. The lens 6 steers according to FIG. 2 the light rays via an angle mirror 15 in turn on the process drum 8.

According to FIG. 3, the light rays reach a mirror 23, which in turn is either along the optical Axis is displaceable up to position 23 'or, if it is large enough in area, parallel to the plane of the original. The lens 24 has in this training a mirror surface 25 and thus reflects the light rays onto a fixedly arranged mirror 26. This in turn directs the light beams onto the process stream ^mel8

Assuming that the distance between the mirrors is 3 of the template levels 1 is the same in each of the exemplary embodiments, as are the focal lengths of the Imaging lenses 6 and 24, that these Objecti ve also have the same opening angle, and that Finally, the same number of mirrors is provided in each imaging beam path, namely in each case four, in order to get a reversed image of the original, and that finally the arrangement of the process flow mel 8 is always the same in every device, then the The front surface of the device type according to FIG. 3 is largest in area, namely 100%, that of the device type according to FIG. 1 is the smallest, namely 95.7%, as can be seen from the scale comparison of the figures recognize is The device type of FIG. 2 has an area size of 97.8%, based in each case on the device type in FIG. 3.

According to Figure 4, the mirror 3 is again up to the Position 3 'can be moved. It directs the light rays onto a mirror 34, which is now only along the optical path for the purpose of optical path length compensation Axis can be shifted to position 34 ', since it should be kept as small as possible in terms of area Mirror objective 24,25 directs the light rays onto a fixed mirror 35, which is now in the immediate Near the original plane 1 is arranged such that the light rays falling on the mirror 34 and the light rays reflected on mirror 25 cross each other.

This device is very small due to the special beam guidance. In terms of area, the front surface is approximately 20% smaller than that of the device type according to FIG. 3. In addition, the overall height has become lower, so that the device is very flat In addition, however, the device according to FIG. 4 same advantages as the type after F i g. 3, namely that his lens is cheap because a mirror lens is also used here.

1 sheet of drawings

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Claims (1)

1 2 additional mirrors must be provided of which Claim: in turn, two can be moved. The second mirror directs the light beams in such a way that the axis beam is oblique Projection copier in which one original is inclined to the plane of the original. The other is firmly attached Moving a first mirror parallel to the 5th mirror is in this training from the Trom template level is scanned in strips and is farther away than the mirror of the mirror object a second sliding mirror, the one. NEN optical path length compensation during the All three types of device build relatively large, if Scanning process causes a fixed one assumes that they are based on common conditions mirror lens and a third fixed io gene, for example the same focal length mirror on a rotating light-sensitive of the imaging lens and the same aperture angle. Drum is imaged, wherein the third mirror is also the same path length of the scanning mirror and further away from the photosensitive drum, the same perpendicular distance from this mirror as the mirror lens and the second mirror is the original plane, furthermore the same arrangement of the drum along that between it and the mirror lens 15 In the device Under this condition, the third running optical axis can be moved because the device type is the largest and the first device type is characterized by the fact that the third device is the smallest, ie about 4 to 5% more adhesive than the third device (35) directly below and in addition to the template type, if one starts from the size of the front surface of the plane (1) but outside the path of the device and assumes that the depth of the device is arranged on all mirror (3, 34) that can be moved in such a way is consistent
The object of the invention is to provide an optical image (35) and from the third mirror (35) to the light-emitting beam path, in which the device small-findable drum (8) reduces reflected light rays and is flatter than all of the above-mentioned devices between the first (3) and the second spar. gel (34) intersecting optical axis. 25 a. such a device is cheaper and allowed at the same better inventory, it takes better performance when shipping less packaging material and it offers In addition, better transport options and also better installation options. The invention relates to a projection copier 30. The object according to the invention is achieved by the characteristic the generic term of the claim. Characteristic feature of the claim solved In the case of a first type of device, the displaceable Due to the special beam guidance, is ren mirror moved parallel to the original plane, and the device very flat and otherwise, based on the Although the second mirror with half the speed front surface of the device, about 20% smaller than that speed of the first mirror to find an optical path. H. the device of the third type with to achieve the same balance. The optical axis of the lens mirror lens. This training is also parallel to the tives. The device according to the invention is therefore also Template level and the other permanently arranged parts are much smaller than the smallest described device type, gel is arranged at such an incline behind the lens. Further details can be found in the following that he can see the light rays on the photosensitive drum 40 writing of the drawing. It shows mel directs F i g. 1 the schematic representation of the first to In the case of a second device type, the two device types belonging to the state of the art steer;
sliding mirror that grains from the original plane. 2 the second type of device described; menden light rays obliquely to the plane of the original in the Fig. 3 the device underlying the invention Lens, d. H. the axis of this objective is 45 type to the template; inclined to the opposite plane. The other firmly attached. 4 the device according to the invention, The arranged mirror is in this training by a Angled mirror replaces the original 2 of the same size as seen in the direction of light, which is arranged with the lens guard. In this type of device, a mirror 3 is scanned in strips. For this purpose, the 50 effecting the optical path length compensation is shifted the mirror 3 into position 3 '. This mirror is a simple plane mirror. If this mirror displacement path is the same length for all devices, is designed to be large enough in terms of area, it can measure F i g like the scanning mirror displaced parallel to the plane of the original. 1 on an angle mirror 4.5, which directs the light, so that beams into the lens 6 for the two sliding mirrors. From here, only one guide is required.
move along the optical axis. In order to compensate for the optical path length when connecting speed is then to be corrected accordingly - shifting the mirror 3 is achieved, the spars, gel 4 and 5 shifted to position 4 ', 5', in both device types have four mirrors and create the horizontal component at half the speed therefore a reversed image of the original on the same side as the mirror 3. the photosensitive drum. According to Fig. 2 is the axis of the lens 6 to The optical complexity in both of the described forms of the original plane is inclined. The rays of light arrive device types take up a relatively large amount of space and lead from mirror 3 to a mirror 14, which runs along the large devices. 65 see axis up to position 14 'is shifted when In a third type of device, the objective is both the mirror 3 is moved into position 3 '. One forms the For example, designed as a mirror lens, so that, in terms of area, mirror 14 is large enough, then he can to get a reversed image, only three are moved parallel to the original plane,