JPS6157906A - Array calibrating device for both ends of optical fiber - Google Patents

Abstract

PURPOSE:To obtain an inexpensive image transmission device or system by using an inexpensive optical fiber which is easily obtained by adding a function which corrects random element wire arrays at both ends of the optical fiber and variance in light transmissivity due to the inclination of element wires at both ends. CONSTITUTION:An object image 21 is incident on one terminal of the optical fiber 23 as a luminance signal through an image pickup lens 22. A luminance signal appearing at the other terminal of the optical fiber 23 is guided to a CCD element 25 for luminance-electric signal conversion through a matching lens 24 and converted into a voltage signal proportional to luminance. Then the signal is converted by an A/D converter 26 into a digital signal, which is saved in a memory 127. Its contents are matched by a matching device 29 through said calibrating operation according to the both-terminal array correspondence of the optical fiber and contents of corrected values of light transmissivity of element wires which are saves in a memory 28, and rearranged and outputted. A video screen corresponding to the object image picked up through the image pickup lens 22 is reproduced on a television screen.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention calibrates the arrangement and light transmittance of each strand at both ends of an optical fiber to enable transmission of video image information. This invention relates to an array calibration device.

[Prior Art] ' Conventionally, as a fiber for optically transmitting an image, there is an image fiber whose both ends are arranged in a 1:1 ratio, that is, the strands are arranged so that the strands are arranged in the same position on both end faces. However, it was extremely expensive in terms of cost. On the other hand, optical fibers are low-cost, but as shown in Figure 3, each element at both ends (inlet/outlet)
The arrangement of S, . . . is random, and the positions of both end faces are not matched. Also, due to manufacturing reasons, each strand S is 0 at both ends,...
are not all positioned in parallel, but are cut at an angle as shown by B in the figure, and the light incident angle and light transmittance of each element wire are not constant.

[Problem that the invention seeks to solve]

For this reason, in the past, optical fibers could not be used for image transmission, and expensive image fibers had to be used. This has led to a significant increase in costs.

[Means and effects for solving the problems] The present invention has the following features:
For video signal transmission, we use an inexpensive optical fiber that has a track record of being used under conditions of about 200 degrees Celsius. This system adds a function to correct for variations, making it possible to reproduce the incident video signal as it is.This allows the use of inexpensive and easily available optical fibers for image transmission, without using expensive image fibers. As a result, an inexpensive image P-image transmission device or system can be realized.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing an embodiment of the present invention for obtaining optical fiber arrangement calibration and light transmittance calibration information, and FIG. 2 is a block diagram showing a specific example of application of the above embodiment device. .

[Sequence calibration]

In FIG. 1, reference numeral 1 denotes a light spot generating device, and in the figure, a light spot (dot information of a certain size) is drawn at the upper left corner of the video screen 2. 3 is an imaging lens, and this lens 3
The focal point of is coupled to the left end (one end) of the optical fiber 4, and the light spot on the video screen 2 passes through the optical fiber 4 as a brightness signal and is guided to the right end (the other end) of the optical fiber 4.
The brightness signal obtained at the right end is transmitted through the matching lens 5,
Brightness/'Ei signal conversion CCD element 6tlC is guided,
The brightness is converted into a proportional voltage signal. The voltage signal obtained from the CCD element 6 is converted into a digital signal by the A/D converter 7 and sequentially saved in the memory 8 (for example, 256×256 horizontally).

The processing unit 9 saves the memory INK and CCD.
Check the i&high value of the contents of element 6 (for example, 256 x 25608 bit unit information), use this to recognize the location (position of CCD element) of the data of the optical fiber on the entrance side and exit side, and write a memo v-nxo Save above. In the subsequent calibration, the period of the light spot generating device 1 and the processing device 9 is determined by the signal on the signal path 13, and the light spots on the video screen 2 are sequentially shifted so that, for example, the number of strands of the optical fiber is 10,00.
If 0 is targeted, the total of 1001 horizontal and vertical Zoo is 10,0
Automatically calibrate the 00iW location from start to finish. f&Finally, on the memory ■10, 10, corresponding to each light point,
000 location information will be saved.

12 is a monitor TV, and the right end area of the optical fiber and CC
At the same time as comparing the light receiving areas or checking the focus, it is possible to monitor the state of the right end of the optical fiber with respect to each light spot on the video screen 2.

[Calibration of light transmittance]

The calibration equipment is the same as the array calibration described above, and a light spot is generated in the entire area of the video screen 2 (for example, the light reception at the left end of 4 is made uniform, and in the same way, a matching lens 5, a CCD transducer 6, and a saving conversion are used. 57 and is saved on the memory 8 (for example, 256 horizontally x 256 vertically).

CC saved in memory I8 by processing bag W, 9
The highest value of the contents of the D element (for example, 256x256 8-bit unit information) is checked, and the memory is calculated by array calibration based on this highest value...The transmission of each optical fiber strand corresponding to the 10th place fFl information The magnification is calculated and the result is saved in the memory @11.

[Application example]

In FIG. 3, a limb image 21 is input to one end of an optical fiber 23 by an imaging lens 22 as a luminance signal.

This luminance signal is transmitted by an optical fiber 23 to the other end of an optical fiber 23 provided at an arbitrary position.

The 'NN times signal sent to the other end of the optical fiber 23 is converted through the matching lens 24 into a '#411[/''LL signal conversion signal.

The voltage signal obtained from the CCD element 25 is converted into a digital signal by the A/D converter 26, and the voltage signal is sent to the memory I.
27 (for example, 256 width x 256 height).

Memo! The contents of J-1xy are matched and reorganized by the matching device 29 according to the optical fiber both-end arrangement correspondence and the contents of the correction value of the light transmittance of each strand, which were previously saved in the memory 28 by the above-mentioned calibration operation. is output.

Therefore, on the television screen 30, a video screen corresponding to the imaged object captured by the image pickup/display lens 22 can be reproduced.

Compatible with optical fiber double-end arrangement and light transmittance correction value:
Calibrate as in the above example and check the result (Memo! 7)
-n l o, ) -f: Memory 28 is obtained by converting the Lee KIIIC stored friend data) into a ROM or storing it in a storage medium.

As mentioned above, by storing correction data for the alignment and light transmittance of both ends of the optical fiber in the memo UIIJO and the memory N1xVC, and calibrating the image data at Kff based on this data, the image fiber using the optical fiber can be used. Image transmission processing is now possible, and by including light transmittance correction, image quality can be further improved.

〔Effect of the invention〕

As described in detail above, according to the present invention, by calibrating the arrangement of both ends of the optical fiber and the light transmittance, and by making it possible to transmit video image information, an inexpensive optical fiber can be transmitted without using an expensive image fiber. It is possible to provide an optical fiber both-end arrangement calibration device that makes it possible to realize a video transmitter m having an economically advantageous configuration using fibers.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing an application example of the above embodiment, and FIG. 3 is for explaining the end structure of an optical fiber targeted by the present invention. This is a diagram. 1... Light spot generator, 2... Image 1-elephant screen, 3
゜22...Imaging lens, 4.23...Optical fiber,
5゜24... Matching lens, 6.25... CCD element, 726... A/D converter, 8, 10, 11, 27゜28... Memory, 9... Processing device, 12 ... Monitor TV, 29... Matching device. Applicant Sub-Agent Patent Attorney Takehiko Suzue Figure 1

Claims (1)

[Claims] A video screen on which one end of an optical fiber to be calibrated is placed facing each other, a light spot generating means for displaying a bright and dark image on the video screen through predetermined surface scanning, and a CCD element on which the other end of the optical fiber is placed facing each other. an A/D converter that converts the image signal output from the CCD element into digital information; a first storage means that stores the information output from the A/D converter; a processing device for obtaining each correction information of the positions of both ends of the optical fiber bundle and the light transmittance based on the information stored in the storage means and the scanning information of the light spot generating means; 1. An optical fiber double-end arrangement calibration device, comprising: second storage means for storing information obtained by the calibration process.