SU1205108A1 - Device for printing additional information in frame - Google Patents

Description

 12051

2. A device according to claim 1, characterized in that a first transparent conductive coating, a layer of electro-optical material and are successively applied on the second side surface of the polyhedron. second transparent conductive coating.

one

The invention relates to optical instrument making, in particular to photo-camera devices equipped with built-in printing devices when shooting a subject of additional information in a frame.

The purpose of the invention is to simplify the design of the device.

FIG. 1 shows a camera with a device for imprinting additional information, a general view when the back cover is open; FIG. 2 shows obtaining an optical unit in the form of a polyhedron by cutting a straight, coal parallelepiped; in fig. 3 - a polyhedron and a course of rays in it, a general view; in fig. 4 - a polyhedron with an optical prism fixed on it and the course of rays in it, about PC1Y view; in fig. 5 is a structural diagram of an embodiment of an electro-optic cell; in fig. 6 is a diagram of the location of the imprinted information on the positive.

The optical unit in the form of the polyhedron 1 of the device for imprinting additional information into the frame, mounted in the pressure table 2, mounted on the back cover 3 of the camera 4, serves to orient the imprinted additional information to the horizontal 5 and 6 vertical locations on the captured frame 7 of photographic film 8 On the side surface of Polyhedron 1 there is applied a composite electrically-optic cell 9 and an additional optical polyhedron 10 can be installed (glued) to create an optical block with an additional tional system to output information on the side face 6 is applied to electro-cell component 11 and attached

08

An optical prism is also installed on its base, one of the faces of which is parallel to the front surface of the polyhedron and tilted at an angle of 45 ° to the base of the prism, and the opposite edge is perpendicular to the base of the prism.

optical prism 12. At the same time, one of the variants of electro-optical cells 9 and 11 implies the content of transparent 5 coatings 13, orienting coatings 14, electro-optical material (liquid-crystal) 15 and gaskets 16 in their composition.

The impressed information is located on the photograph (positive) 17, respectively, in the horizontal 18 and vertical 19 directions.

An optical unit in the form of a polyhedron 1 can be obtained by cutting a rectangular parallelepiped-. Yes ABCDA B C D, IB the base of which lies on the rectangle ABCD, which is in a variety of planes.

20

Section of the parallelepiped ABCDA B C D

produced as follows. A portion of the parallelepiped at the vertex A is clipped by the first plane of the SEF, inclined at an angle of 45 ° to the base of the parallelepiped ABCD, with the straight line ES of the plane of the SEF oriented below. angle 45 to the straight line SO of the SOE plane, coinciding with the base plane of the parallelepiped. The part of the parallelepiped at the vertex C is dissected by the second 30 by the plane S F G inclined under

 an angle of 45 ° to the base of the parallelepiped ABCD, and the straight line S G of the plane S F G is oriented at an angle of 45 to the straight line S O of the plane

35 S Q G coinciding with the plane

base of parallelepiped. In this construction, the SEF plane is perpendicular to the S F G plane.

40 As a result of the completed sections, the polyhedron 1 is formed in the form of a truncated pair of the shellepiped ABCDKLMNPQRT (Fig. 2).

On the side face of the PQRT of the ABCDKLMNPQRT polyhedron, an electro-optical cell 9 is applied, which changes its optical characteristics (refractive index value) under the action of an applied electric field created by transparent electrodes (not shown), and an additional optical polyhedron 10 is installed (glued) the face of the resulting polyhedron is the face of AKNPTD, reflecting the faces — the faces ABCD and bCLMN. The action of the PQRT face of the polyhedron ABCDKLMNPQRT depends on the presence of an electric field that changes the value of the refractive index of the electro-optical cell 9 (p), i.e. the PQRT face of the ABCDKLMNPQRT polyhedron can be reflective or refractive.

The dimensions of the optical unit 1 are determined based on the diameter of the incident light flux d and the magnitude of the required displacement b

R (b + d) + a;

h (b + d) / 2 + D;

t d + d

where L - allowances for chamfers and mount.

When installing the optical unit on the optical axis of the device, the beam L, falling normally on the AKNPTD face and parallel to ABCD, hits the face. RTPQ. Then, depending on the ratio of the values of pm (the refractive index of the cell 9) and (the refractive index of the optical glass), the course of the rays in the optical unit may be as follows. For n Hjj, the light beam passes the face of RTPQ, cell 9 and falls into the additional polyhedron PQRTC O. Through. face QC R the beam leaves the optical unit in the direction Q. In this case, with inequality n and the face RTPQ is refractive. With p m: the light beam experiences total internal reflection, provided that the angle of incidence of the beam on this face is greater than the limit angle of total internal reflection, defined by the expression sinS np

 one

Pet

At the angle of incidence of the beam, the edge of the RTPQ. equal to 45, this condition fulfills a large class of optical glasses with a refractive index

5108

  1.5. Thus, having experienced. on the verge of RTPQ, total internal reflection, the beam is reflected at an angle of 45 °

 on the edge ABCD. The angle of the ray on the edge ABCD is also equal to 45 °, respectively, the beam experiences a full internal reflection on this face and is reflected on the KLMN face. Since the KLMN face is tilted at an angle of 45 to

to the base of the ABCD, then the reflected beam incident on it at an angle of 45 also experiences total internal reflection and, through the face of the BLMQRC, exits the optical unit in the direction a. With such a path, the plane of incidence on the face of KLMN and PQRT is perpendicular to each other, and the plane of incidence on the face of ABCD is an angle of 45 ° with each of these planes. As a result of the triple total internal reflection and spatial course of the rays, the image formed by the luminous flux is displaced and rotated by 90 (Fig. 3).

Thus, the use of the access block allows the orientation of the imprinted information in the frame 7 to be changed by 90 ° by changing the refractive index of p. Prip - Pst orientation of the projected image, coincides with the position of the matrix of sign-synthesizing elements; at PM Pst, the image is rotated by 90 °.

In the process of shooting with the rear cover 3 closed, frame 7 onto the film 8 from the substrate side with an optical unit is inserted horizontally (5) or vertically (6) information typed on the matrix and the sign of the synthesizing elements (not shown) Depending on the orientation of the camera 4 during shooting, it is produced by a switch located on the outer side of the rear cover 3 (not shown). The switch supplies the supply voltage to the transparent conductive coatings 13 applied to the surface of the lateral face of the RTPQ polyhedron and the base of the additional polyhedron 10. In this case, the electric field arising from the melody current with the coatings 13 the electro-optical material 15, which leads to a change in the PC.

When shooting with a horizontal camera, the side of the image taken with the print 17 is long

5 1

horizontally (axis XX), while information 18 is imprinted (Fig. 6). In the case of c-filming with a vertically positioned camera, the short side of the snapshot 17 is horizontally oriented when printing (ocb d d), while the information 19 is imprinted.

In order to visualize additional information in the process of shooting, transparent conductive coatings 13 are deposited on the surface of the KLMI face of polyhedron 1, between which a layer of electrophocic material 15 is inserted, and an optical prism of 12 KLMNUH is installed, which has a perpendicular plane UH1-1L KLMN plane. Such an optical unit allows to obtain three displaced and differently oriented images: images

a and - The image of cx is formed as follows. When there is a layer 11 on the KLMN face, the beam experiences total internal reflection and propagates in the a direction, if n i Pet In the case of a n g-1, the beam hits the UHML face and exits through the UHMK face about. . When forming the image (the mode of visualization of the imprinted information), it is necessary to use an additional projection device.

to

051086

Each electro-optical cell (9 and 11) is positioned with substrates (for example, 1 and 10), which are the faces of the corresponding multi- 5 facets on which transparent conductive coatings 13 are deposited with orienting layers 14 applied to them. for example, 1 and 10) are sealed with an epoxy resin, and the distance between them is set by gaskets 16, for example, from Teflon. A nematic liquid crystal 16 is introduced into the forming cavity. The supply voltage U is applied to layers 13 5, as a result, the molecules are reoriented in the layer of liquid crystal 16. This changes the refractive index of the liquid crystal layer by an amount determined by different values of the refractive index of the liquid crystal layer at its initial orientation and in an electric field. When the voltage is removed, the initial orientation of the liquid crystal layer is restored. Depending on the initial orientation and feed U 20

25

thirty

but get the following modes:

wtx ". „, Ei.1,„ WCX

P

AND

 P

P

 Pet or n ;, P, i.e. It is possible to realize with the help of a reflector various options for imprinting and visualizing additional information.

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but

FIG.

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FIG. five

Editor A. Ogar

Compiled by S. Shigalovich

Tech1) ed..S.Migunova Proofreader M.Maksimishinets

Order 8527/49 Circulation 447 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., D. 4/5

".- - -

Branch ShSh Patent, Uzhgorod, 4 Project St.

In FIG. 6

 18

Claims (2)

1. DEVICE FOR IMPRESSING ADDITIONAL INFORMATION IN THE FRAME, containing sequentially located along the optical axis a matrix of symbol-synthesizing elements with a illuminator and a projection system, characterized in that, in order to simplify the design, it is equipped with an optical unit made of optically transparent material installed behind the projection system, made in a polyhedron, the front surface of which is parallel to the rear surface and perpendicular to the base, to which the first and second are located at an angle of 45 ° I have the side surfaces facing the front and rear surfaces, respectively, the front surface being perpendicular to the optical axis, at an angle to which the first side surface is optically paired with the second through the base, and the first transparent conductive coating, a layer of electro-optical, is sequentially applied to the first side surface material and a second transparent conductive coating. 01S0ZI oo> 2. The device according to π. 1, characterized in that the first transparent conductive coating, a layer of electro-optical material and are sequentially applied to the second side surface of the polyhedron. the second transparent conductive coating, as well as an inserted optical prism mounted on its base, one of its faces parallel to the front surface of the polyhedron and inclined at an angle of 45 ° to the base of the prism, and the opposite face is perpendicular to the base of the prism.