JPS5931471B2 - Recording device with reading means - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention optically records letters, numbers, and symbols on a recording material one after another rapidly and clearly, and even while recording, the already recorded letters, numbers, and symbols The present invention relates to a recording device that enables enlarged projection and reading of images.

In general, devices that record letters, numbers, and symbols one by one have a structure that allows the recorded contents to be read during the recording process to check for errors and the suitability of character arrangement. This is desirable in that it allows you to keep recording.

Ordinary typewriters have these characteristics. That is, the structure is such that letters, numbers, and symbols are recorded one after another, and the recorded letters, numbers, and symbols can be read immediately. However, although mechanical recording devices such as typewriters are suitable for instantly reading the recorded content, they are not suitable for fields that require clear recording of minute characters, numbers, and symbols. Furthermore, it is not suitable for the field of enlarging and projecting recorded information using an overhead projector or the like and showing it to a large number of people in terms of clarity and the like. On the other hand, phototypesetting machines used in the printing field cannot confirm the recorded image until all printing is completed and development and fixing operations are performed. However, some recording materials used in optical recording devices do not require development, fixing, etc., and can be visualized and read simultaneously upon irradiation with recording light. For example, it is disclosed in Japanese Patent Application Laid-Open No. 48-19303, in which a thin layer containing a dye or a thin layer of metal is provided on a transparent base material.

These record by utilizing the fact that evaporation or diffusion is caused by the irradiation of light with high energy density, such as a laser or flashlight, and the potential density of that area is reduced. If such a recording material is used, optical recording and reading can be performed simultaneously. By the way, in order to sequentially record letters, numbers, and symbols on the recording material, it is necessary to sequentially shift the irradiation position of the recording nine with respect to the recording material.

For this purpose, there are two methods: fixing the recording material and sequentially shifting the irradiation position for recording, and fixing the irradiation position for recording and sequentially shifting the recording material. In the former method, it is necessary to sequentially shift the source or, in some cases, the condenser lens, optical mask, etc., the drive system becomes large-scale, it is difficult to increase the speed, and there is play due to vibration etc. However, long-term use and precise position control are difficult. On the other hand, the latter method requires recording materials and other materials. Since it is only necessary to drive the holder according to the position, it has the advantage that more precise position control can be easily performed using a smaller drive system. However, if we consider that when this recording material shifts, the letters, numbers, and symbols recorded on the recording material are enlarged and projected, each time we record letters, numbers, and symbols sequentially, the recording material becomes larger for the reading system. As the image shifts, the image projected onto the screen gradually shifts, and eventually most of the main parts end up outside the screen, making it unreadable.

From this point of view, it is conceivable to use a projection device large enough to be able to project even if the recording material moves, and also to use a screen large enough to project the projected image. Not only is it expensive because it requires a large screen, but the position of the image moves each time it is recorded, making it difficult to read and impractical. The purpose of the present invention is to provide a device for sequentially recording characters, symbols, etc., which can read what has already been recorded during the recording, and which is simple in construction and does not require a large screen. It provides:

According to the present invention, a device that optically records letters, numbers, and symbols one after another while moving a recording material one after another at a fixed location is used to record characters, numbers, and symbols already recorded on the recording material. An optical system capable of enlarging and projecting a symbol to read it is provided, and the optical system is structured to move in conjunction with the recording material.

Next, an embodiment of the recording apparatus according to the present invention will be described with reference to the drawings. This example shows a case where light from a light source is converted into a pattern of letters, numbers, and symbols using a mask and recorded on a recording material. In FIG. 1, reference numeral 11 denotes a holder for recording material, and the holder 11 is movable in the left-right direction as indicated by arrow 12 and in the front-rear direction as indicated by symbol 13 in the figure. Recording material 1 on holder 11
4 is retained. The recording material 14 is a thin layer of pigment or metal formed on a transparent paste, and when this is irradiated with a strong light pulse, that portion is thermally evaporated or melted. A magnetic mask 15 is disposed closely facing the recording material 14 . For example, as shown in FIG. 2, the pharmaceutical mask 15 has an open ring-shaped opaque band 18 formed on a glass plate 16 with a chromium thin film of 1 μm thickness from 200 Å, for example, and the opaque band 18 has letters, symbols, numbers, etc. along with this, for example, one side is 20 μm to 500 μm.
They are arranged and formed as a micro character pattern 19 with a size of μm. The optical mask 15 is rotated by a motor 21 around a shaft 17. A likelihood pulse 23 from a high energy light source 22 such as a laser light source is applied to a likelihood mask 15.
The recording position 24 of the recording material 14 is irradiated through the recording material 14 . By generating the light pulse 23 when the micro character pattern 19 of the character to be recorded is located at the recording position 24, the light is transferred to the recording material 1 as the light of the character pattern 19.
4, the thin layer of material evaporates or melts according to the character pattern and is recorded as a direct image. In this invention, a reading light source 26 is provided on the side opposite to the optical mask 15 with respect to the recording material 14.

The light source 26 is focused by a reflecting mirror 27 and condensing lenses 28 and 29, and projected onto a portion of the recording material including the recording position 24 through, for example, a transparent portion of the holder 11. Recording material 1
The reading light transmitted through 4 passes through a projection lens 31, is reflected by a reflecting mirror 32, and is projected onto a screen 33. Any number of documents can be recorded on the recording material 14, and the ends of one page of the recording are marked with dots 34 on both sides of the recording position 24.
35, this area the size of one page is illuminated by light source 2.
The image from 6 is projected onto the screen 33. Further, a reading light source 26, a reflecting mirror 27, lenses 28, 2
An optical system 36 consisting of 9, a projection lens 31, and an optical system 37 consisting of a reflecting mirror 32 are mechanically connected to the holder 11 so that the movement of the recording material 14 is interlocked.

The reflecting mirror 32 does not necessarily have to be interlocked. At the time of recording, although not shown in the figure, for example, by the operator operating the keyboard, a desired microcharacter pattern on the optical mask 15 is moved to the recording position 24 as described above, and immediately thereafter A laser beam 23 from a light source 22 is irradiated diagonally above the recording position 24VC, and the optical mask 1
The selected letters, numbers, and symbols of No. 5 are recorded on the recording material 14.

After one letter, number, or symbol is recorded, the holder 11 of the recording material 9 is moved in a direction perpendicular to the paper surface by about one letter, number, or symbol, and the recording position 24 is A new portion of recording material 14 is moved. For each recording of one character, the transparent part 20, which is a missing circle of the opaque band 18 of t, is located between the points 34 and 35 of the atomistic mask 16. Therefore, as described above, by using a recording material 14 that does not require a phenomenon and becomes visible at the same time as the light is irradiated, the characters recorded on the recording material by the reading optical systems 36 and 37 can be read. , numbers, and symbols are enlarged and projected onto the screen 33. Therefore, the operator can immediately read the characters that have just been recorded, even though they are correct. Thereafter, letters, numbers, and symbols are recorded one after another in the same way, and when one line has been recorded, a line feed is performed and the letters, numbers, and symbols are recorded one after another on a new line.
In this way, a page's worth of letters, numbers, and symbols are recorded, and in the process, the screen 33
FIG. 3 shows the state of the projected image appearing above. For comparison, the structure is almost the same as that shown in FIG. 1, but FIG. The device VC. } FIG. 5 shows the state of the projected image appearing on the screen 33. This can be obtained by sequentially recording - the line length of the page image (
That is, the length in the horizontal direction is a, and the length in the vertical direction is b. A rectangle 38 labeled ABCD indicates the projection at the edgemost position of the page to be recorded. If the enlargement projection magnification of the reading optical system is n, the lengths of AB and CD are equal to Navc, and the lengths of AD and BC are equal to NbVC. Initially, the recording position is located at point A, and at this point, characters, numbers, and symbols are recorded, and at the same time, the recording material 14 is placed in a direction perpendicular to the paper surface as shown in FIGS. 1 and 4. , is driven by about one character of the symbol. This is repeated one after another, and when the end of the first line is reached, in the case of the device shown in Fig. 1, the projected image of this page is A, B, which is shifted laterally by a distance a, as shown in Fig. C, D, whereas in the case of the apparatus shown in FIG. 4, it becomes A2B2C2D2, which is shifted laterally by a distance of Na, as shown in FIG. In this way, in the device of this invention shown in FIG. 1, the image projected onto the screen 33 shifts by only 1/n of the entire image, whereas in the case of the device shown in FIG. It can be seen that it is the same size as the image of Therefore, the larger the enlargement projection magnification n is, the more effective the device of the present invention becomes. For example, in the case of a projection state such as an overhead projector that is to be shown to a large number of people at the same time, the enlargement projection magnification is normally used at 4 times or more, but even at such a magnification, the effect of this invention is sufficiently large. . Further, when micro characters are enlarged and projected, the enlargement projection magnification n is generally 10 or more, and the effect of the present invention is very large. Also, when the lines are sequentially advanced and the recording position reaches the first position of the last line, the recording material moves by an amount b to the left as shown in Figures 1 and 4.
At this time, in the case of the apparatus shown in FIG. 1, the reading aperture system moves to the left by an amount b along with the recording material, so its enlargement projection magnification increases very slightly. If this is set as N3, the projected image becomes A3B3C3D3 in FIG. Here, A3B3 and C
Each length of 3D3 is equal to N5a, A3D3 and B3C
Each length of 3 is equal to n:b. At this time, the projection lens 3
The distance from 1 to the screen 33 via the reflecting mirror 32 is S.
+b, the change in enlargement projection magnification is given by the following equation. In this way, the enlargement projection magnification is (distance traveled by the recording material) ÷
(the projection distance from the projection lens to the screen).

However, this value is generally small; for example, in the case of an overhead projector, the moving distance of the recording material is about 11 peaks [about the size of the material, for example, about 20 cm, whereas the projection distance is usually 150 cm or more; Therefore, the change in magnification is also less than 20/150=1/7. A change in magnification of this magnitude has no practical problem. Furthermore, in the case of a microfilm enlargement projection device, the change in magnification is even smaller; for example, if the moving distance of the recording material is 1 cm and the projection distance is 50 cm, the change in magnification Q is 1/5.
If it is around 0, there is no problem at all in practice. Furthermore, as will be described later, it is possible to select a form of the apparatus of this invention that does not cause a change in magnification, and the apparatus of this invention can be used without any problems even in applications where even slight changes in enlargement projection magnification are undesirable. be able to. On the other hand, in the case of the device shown in FIG. 4 as a comparative example, 0
ζThe upper left end of the frame, which was initially at position A in Figure 5, changes its position to point A2 or point A4, and then to point A.

Therefore, with such a device, the image projected gradually shifts, which not only makes it difficult to see, but also requires at least A5B4C in order to be able to read the entire page at all times.
Screen 33 covering D2 and nine sources 26 for reading
A reading light source 26 that is large enough to cover even if the recording material is shifted is required. On the other hand, with the device of this invention, an almost still image is always displayed on the screen 33.
It is easy to read the image projected on the screen, and the reading light source 26, screen 33, etc. can be made much smaller than in the apparatus shown in FIG. Although the reading-type reflecting mirror 32 may be omitted in some cases, or more than one may be used, it goes without saying that it is not necessary for all of them to move in conjunction with the recording material 14. stomach.

The screen 33 can also be said to be an element of the reading optical system 5, but it does not need to have a structure that moves in conjunction with other reading optical systems. In FIG. 1, the reflecting mirror 32 of the reading optical system
An example was shown in which the recording material moves in conjunction with the recording material.
It can be seen that the enlargement projection magnification changes only slightly, and the deviations among the four positions of the image are also very small, so there is no problem at all for normal use.

However, for example, if there is no reflecting mirror 32, or if the reflecting mirror 32 forms an angle between the recording materials 14 and 45 and is not structured to move in conjunction with the recording material, the projection distance from the projection lens to the screen will change. Therefore, the enlargement projection magnification does not change at all. Therefore, such a reading optical system is preferable when a slight change in the enlargement projection magnification becomes a big problem. The above explanation assumes that letters, numbers, and symbols are recorded sequentially, but information can also be added as needed to the margins (non-image areas) of an image that has already been recorded. Needless to say, it is used.

Furthermore, although the example in FIG. 1 shows a case where the area of the page is much smaller than the area of the recording material 14, for example, an overhead projector or the like in which the size of the recording material 14 is exactly one page is used. It can be applied in exactly the same way. As the recording material used in the apparatus of this invention, it is possible to use a recording material that is partially visualized through a simple and quick developing process, but it is possible to use a recording material that is partially visualized through a simple and rapid developing process, but it is possible to use a recording material that is partially visualized at the same time as exposure without going through a developing process. The most desirable one is For example, as shown in Japanese Patent Application Laid-open No. 19303/1983, when the energy within the material increases beyond a certain critical threshold as a result of energy absorption, continuous recording of the solid material at that location is possible. Thin films of diffusive imaging materials can be used in which images can be recorded using evaporation or discontinuity of the thin layer. Since the recording device of the present invention is an optical recording device, the point of the light source required for recording is particularly sensitive to micro characters, for example, characters approximately 20μ on one side.
m-}}record micro characters that are approximately 500 μm,
It is suitable for a device that simultaneously enlarges and projects the image and reads it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the main parts of a recording device having a reading means according to the present invention, FIG. 2 is a plan view showing an example of a magnetic mask, and FIG. 3 is a screen diagram of the device shown in FIG. 1. FIG. 4 is a diagram showing the configuration of a recording device for comparison with the apparatus of the present invention, and FIG. 5 is a diagram showing the displacement of the projected image on the screen of the apparatus No. 7. 11: Recording material holder, 14: Recording material, 15: Optical mask, 19: Character pattern, 22: Recording light source, 33
: Screen, 36, 37: Reading optical system.

Claims (1)

[Claims] 1 A recording material holder that holds a recording material, and the recording material holder is moved independently (two-dimensional movement) in two directions parallel to and perpendicular to the plane formed by the recording material held therein. ), an optical mask facing the recording material held in the recording material holder and having a transparent character pattern such as letters, numbers, symbols, etc.; a recording light source for irradiating a light pulse to the recording position through the optical mask to record the selected character pattern on the recording material as a transparent pattern; , a reading light source disposed facing one side of the held recording material and projecting a reading light onto a portion including the recording position; and a reading light source disposed facing the other side of the held recording material, the above-mentioned A projection lens for enlarging and projecting the reading light transmitted through the recording material onto a screen, and mechanically connecting the projection lens and the reading light source to the recording material holder to hold the recording material. A recording device having a reading means and an interlocking means for moving the tool by the same amount in conjunction with the tool.