前苏联专利SU1540667A3 Optical head for reproducing information from original image

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优先权

专利摘要:
The invention relates to the field of instrumentation, in particular, devices for reproducing information by optical means, and can be used as an optical head for reproducing information from transparent and opaque originals. The purpose of the invention is to increase the speed and accuracy of focusing the optical head-achieved by using as rods for moving the movable part 9 of the body of the optical head 7 two parallel and optical axis 12 rods 31 and 32. The bar 31 is equipped with a rack 40, with which through the gear wheel 41, the focus knob 43 is connected. The rod 32 moves along roller guides 37 and 38, and the rod 31 moves along recess 34 with an anti-friction coating in the fixed part 8 of the optical head. To determine the zone of the original 4, which is used to reproduce information, a mirror 23 is used, mounted perpendicular to the optical axis of the lens 11 on the movable part 9 of the housing. To illuminate an opaque original, one or more light sources located around the lens 11 are used. 2 cp ff, 3 fig.
公开号:SU1540667A3
申请号:SU864028300
申请日:1986-10-17
公开日:1990-01-30
发明作者:Андрее Клаус；Бальцайт Ральф；Парль Ульрих；Ребетге Лутц
申请人:Др.-Инж.Рудольф Хелль Гмбх (Фирма)；
IPC主号:

专利说明:

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moves along the roller guides 37 and 38, and the rod 3 - along the recess of the anti-friction coating in the fixed part 8 of the optical head. To determine the zone of the original 4 with which information is reproduced, a mirror 23 is used, mounted perpendicular to the optical axis of the lens 11 on the movable part 9 of the housing. To illuminate an opaque original, one or more light sources located around the lens 11 are used. 2 s. f-ly, 3 ill.
The invention relates to instrumentation, in particular, to devices for reproducing information by optical means, and can be used as an optical head for reproducing information from transparent and opaque originals.
The purpose of the invention is to increase the speed and accuracy of focusing the optical head.
Figure 1 shows the principal optical layout of the optical head; Fig. 2 shows the same embodiment; fig. 3 shows an optical head, a general view.
The device for reproducing information from the original, which includes an optical head, contains a sweep drum 1 (Fig. 1) mounted on the axis of rotation 2 and having the ability to move in the direction of the arrow 3, the original 4, mounted on the sweep drum 1 inside which, when reproducing information from a transparent original, there is an illuminator 5, which forms a light spot 6 in the plane of the original 4.
The optical head 7 comprises a fixed 8 and a movable 9 parts of the body, in the front panel of the movable part there is a hole 10 in which the lens 11 is placed, the optical axis 12 of which coincides with the radius of the developing drum 1.
In the stationary part 8 of the housing on the optical axis 12 of the lens 11, a diaphragm 13 and optoelectronic converter 14 of the information light beam 15 are mounted. The information signal of the optoelectronic converter is removed from the output bus 16.
On the fixed part 8 of the housing is the leading nut 17, kinematic
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Scientifically associated with the lead screw 18, the axis of which is parallel to the axis 2 of rotation of the sweep drum 1. To facilitate setting the image clarity and location of information from the original, in the fixed part of the body between the lens 11 and the diaphragm 13 is installed a rotating mirror 19, optically connected to the ocular 20 in the form of a lens 21 and frosted glass 22, and, on the movable part 9 of the housing, is a mirror 23. A cover 24 is used to protect the internal cavity of the optical head 7.
When reproducing information from an opaque original in the recess 25 of the front panel of the movable body part 9, light sources (not shown) or condensers 27 are located in the openings 26, which are mounted so that their optical axes 28 pass through the zone of focus of the lens 11. In the case of the use of condensers 27, the luminous flux is supplied to them via light-guide cables 29 and is focused in the zone 30 of the lens 11.
In the movable part of the optical head housing, parallel rods 31 and 32 are mounted parallel to the optical axis 12, mounted for movement in the direction of the arrow 33 relative to the fixed part 8 of the housing, in which a recess 34 is made lined with antifriction material. The rod 31 is located in the recess 34 and springs 35 and 36 covered with an anti-friction coating are pressed to its surface, and the rod 32 is placed between the roller bearings 37 and 38, while the rod 31 is provided with a recess 39 with a gear rack 40 located in it that engages with a gear wheel 41 mounted on the shaft 42. The latter is driven in rotation by a handle 43.
515
A device for reproducing information from the original, which includes an optical head, works as follows.
The illuminator 5 (Fig. 1) illuminates the transparent original 4 located on the development drum 1 with a focused light beam. The modulated information beam of light is directed by the lens 11 through the aperture
13a optoelectronic converter
14, an information signal is output from the output bus 16 of this converter. Scanning of the original 4 is carried out by moving the optical head 7 along the lead screw 18 (FIG. 3). The lens AND is focused by moving the movable part 9 relative to the fixed part 8 of the optical head body. The movement is ensured by the movement of the rod 31 with the toothed rack 40 mounted on it with the gear wheel 41 connected via the shaft 42 to the focusing handle 43.
The bar 31 is installed in the recess 34 lined with antifriction material in the fixed part 8 of the housing, and the supporting bar 32 is located in the roller bearings 37 and 38, which ensures smooth movement - not the movable part 9, and therefore the smooth focusing of the lens 1
To facilitate the work of the operator in determining the location of information reproduction from the original and to set the image sharpness in the optical head 7, the mirror 23 on the movable part 9 and the swivel mirror 19, as well as the eyepiece in the form of a lens 2 and ground glass 22 in the fixed part can be used. 8 optical head.
When reproducing information from an opaque original, the illuminator is made in the form of one or several light sources or condensers 27 (FIG. 2) optically coupled to the output ends of the light guide cables 29, and the light source or condensers are located in the movable part 9 of the optical head body 7 around the lens 11.
Otherwise, the operation of the device for reproducing information from an opaque original is similar to the operation of a device for reproducing information from a transparent original.
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Formula
the invention
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权利要求:
Claims (3)
[1]
1. An optical head for reproducing information from the original, comprising a housing consisting of moving and stationary parts interconnected by means of guides kinematically connected with a means of movement, an objective is mounted in the moving part of the housing, and
in stationary, a diaphragm and an optoelectronic transducer, the lens, aperture and optoelectronic transducer are placed sequentially on the optical axis of the head, and the movable part faces the original with the possibility of movement along the optical axis, which in order to increase the speed and accuracy of focusing the optical head, a roller bearing, flat springs with an anti-friction coating and a gear rack are inserted into it, and in the fixed part of the body there is a recess covered with anti-friction materials The guides are made in the form of two rods parallel to the optical axis and placed at one end in the movable part of the body, while the other ends of the rods are located in the stationary part of the body, while one of the rods is kinematically connected to the roller bearing installed in the fixed part of the body, in the recess of which another boom is installed, equipped with a toothed rack, is pressed to the surface of the recess by flat springs and connected with a displacement means made in the form of a shaft fixed in the fixed part of the housing, on at one end of the shaft is a focus knob, and on the other is a gear wheel, kinematically connected with a rack gear.
[2]
2. The optical head according to claim 1, about the fact that at least one light source is installed on the movable part of the body, the optical axis of which is intersected
with the optical axis of the lens within the zone of depth of its sharpness.
[3]
3. The optical head according to claims 1 and 2, characterized in that on the moving part of the housing from the original there is a mirror outside the lens, the surface of which is oriented perpendicular to the optical axis of the lens.
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引用文献:

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JPH0321892B2|1980-03-19|1991-03-25|Fuji Photo Film Co Ltd|

US4403235A|1981-06-23|1983-09-06|Burroughs Corporation|Optical scanning and imaging system utilizing laser diode|

JPS6095764U|1983-12-07|1985-06-29|

GB2152326B|1983-12-26|1988-02-17|Casio Computer Co Ltd|Document reading apparatus utilizing printer mechanism|

JPH0232830B2|1984-03-16|1990-07-24|Dainippon Screen Mfg|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

DE19853537857|DE3537857A1|1985-10-24|1985-10-24|OPTOELECTRONIC SCAN HEAD|

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