JPS5817403A - Picture transmission line - Google Patents

Abstract

PURPOSE:To elevate contrast of a transmitted picture, by constituting so that light is not made incident from a clad part. CONSTITUTION:A picture transmission line I formed by bundling a plurality of optical fiber strands 1 being in a row state is stored in a metallic sleeve 4. To the tip part of the metallic sleeve 4, a cylindrical mask adaptor 5 is installed, and to its tip, a mask 6 is stuck. This mask 6 has such size as has expanded an incident end face 7 of the picture transmission line I, and also is formed so as to drop the transmittivity of a part 8 which is not contributed to picture transmission in the incident end face 7. In this picture transmission line, incident light to go into a clad part is absorbed by the nontransmission part 8 on the mask 6, only incident light to go into a core part passes through the transmission part of the mask 6, is projected by a lens 11, and is made incident to the core part on the incident end face 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a modification of an image transmission path using a 7I/4G system, and is intended to enable the transmission of high-contrast O'vir images.

In one of the image transmission paths for transmitting images and single-turn tubes, a large number of optical fiber elements Im, which serve as pixels, each consisting of a core portion with a high refractive index and a cladding portion with a low refractive index that covers the core sows, are bundled in an aligned state. There is a t. With this image transmission path,
As shown in FIG. 1, which is an enlarged view of the area between the two incident ends, the nine beams incident on the core section 2 are Total reflection is repeated at the boundary between the core section 2 and the cladding section 3, and the signal is transmitted inside the bore section 2. and ζroga,
The 9B incident on the cladding s3 is not in a leakage mode, and may be transmitted to the output end as noise light C due to reflection and scattering at various interfaces in the image transmission path. As a result, the contrast of the transmitted image is reduced. (As a preventive measure against ζ, a direct mask method was devised to cover the cladding S7I [i], but the image transmission path was
Tehiro: The relational distance is several μIIB, and there are many fluent combinations that are difficult to apply.

It is an object of the present invention to eliminate such conventional drawbacks and provide a iii* transmission path capable of transmitting high-contrast 1lii images. The structure of the present invention that achieves this object is 'l
In a good image transmission path in which a large number of tyI f * If are bundled in an aligned state, the transmittance of a portion corresponding to a portion of the incident end 1iIi of this image transmission path that is enlarged in size and does not contribute to the transmission of both images on the incident end face. t4! A mask is provided between the incident end face and 0f14 to reduce the t4! It's fine.

Hereinafter, the image transmission path according to the present invention will be described in one review IIa based on an embodiment shown in the drawings.

A picture gk@transmission path I, showing a cross section of the incident end OS of the image transmission path according to the present invention, is formed by bundling a large number of optical 7 eyes Δ strands it in an aligned state.

A cylindrical mask adapter 5 is attached to the tip 11 of the metal sleeve 40.
is attached, and a mask 6 as shown in enlarged No. 31Il is attached to its tip. This mask 6a image @
The part that does not contribute to the image @ road in 7 where the input end of the feed path IO is enlarged and the input end is very hot (O in Figure J13)
(oblique part) 80 transmittance is reduced.

In the mask 6, the partially enlarged portion indicated by the reference numeral 9 is a transparent portion arranged in the same arrangement corresponding to the core portion of the original fiber element II3 on the incident end face. In FIG. 2, reference numeral 10 denotes a nine imaging lens provided in front of the mask 6, which projects the image onto the source tube mask 6. In order to project the incident light projected onto the mask 6 onto the input end my of the image transmission j6I, a magnifying mask projection lens 11 is provided within the mask camera IIS.

In this image transmission path, the incident light that should enter the cladding section is filtered through the mask 6 and the opaque section 8), and only the incident light that should enter the core section is transmitted through the mask 6 @9t through the lens 11. ] and enters the core portion of the input end.

The fourth garden is connected to the tip of the 0 image transmission line 1o, which is connected to the mask's production method, and is equipped with a master projection and yJell inside.
Attach a photographic film 6' to the tip of the master adapter 50. At this time, at least a 12% cutout is made in the film 6' as a matching station for the film 6' Tomasquater S.
1 and a corresponding protrusion on the master adapter No. 1111 surface, and an image transmission path! A light source 14 is placed behind the diffuser [13], and the image transmission path I
The original fiber element 1110 array lens 111 is passed through the incident end face 7 of the film 6'. After this, one film 6' is removed and printed in high contrast, and OII! The mask 6 is obtained by inverting the digits and f'. The part that connects to the core of Hikari 7 AiP element ill is transparent lI9, and the clad ISK@
The roaring portion is defined as a low-transmittance portion 8 with low transmittance. Then, the obtained mask 6 is attached to the surface of the mask amebuta 5oIIa with the notches 12 meeting the protrusions.

There are other ways to make masks, such as etching a thin metal plate.

In addition, the original 1jia-1ILOi1m image-transmission jl and hIl
It can be applied to devices using image transmission paths such as 1*/5).

As described above in detail with reference to one embodiment, the present invention W1
By adding a mask, lens, etc. to the image transmission path from 1gl, the transmission image @ 03 is improved because -yt does not enter from the cladding part due to the double image transmission path according to 1gl. Since it can be realized, it is 1% economical. Before, the conventional direct II! It is easier to manufacture than the mask method.

[Brief explanation of the drawing]

FIG. 1111 is an explanatory diagram of light transmission in a conventional image transmission path, and FIG. 2 is an illustration of image transmission I! according to the present invention. 〇 Fig. 3 is an explanatory view of both longitudinal cross-sectional views of one embodiment, Fig. 3 is a Hiro mask OL purchase drawing, and Fig. 14 is an explanatory drawing of the line-r Nuku. 1 in the drawing! 1 is the image transmission line, 1 is -yt, 7 is the AIP wire, 2 is the core part, 3 is the clad part, 5 is the mask amegeta, 6 is the mask, 7 is the incident end face, 8 is the opaque part, 9 is the transparent part , 10 is an imaging lens, and 1111 is a master projection lens t.

Claims (1)

[Claims] In an image transmission line in which a large number of optical fibers are bundled in a well-sized state, the distance between the input ends of this image transmission line is enlarged to reach 11"g for nine people.
A mask is provided in front of the input end wiO in which the transmittance of a portion corresponding to a portion that does not contribute to image transmission between the input ends is reduced, and the incident light passing through the mask is transmitted between the input ends. An image transmission path characterized in that a lens for projecting is provided between the mask and the input wI box.