JPS6255121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line sensor combination method for increasing the number of line sensor elements for a radiometer.

Conventional systems of this kind were as shown in FIGS. 1a, b, and c.

The method shown in a has the disadvantage that all the line sensors are not lined up in a straight line, as line sensor 1 is housed in a package like 2, and is combined by shifting their positions. Image could not be obtained.

In the method shown in b, the incident light is divided into two directions by a half prism 3, and a continuous straight line image can be obtained by every other line sensor 1 arranged at right angles. Because it is far away, it is easily affected by changes in temperature, etc., and because the half prism 3 is used, the back focus of the optical system needs to be longer than in the methods shown in a and c. There were drawbacks such as difficulty in combining.

The method shown in c is a method of using optical fibers 6, but since it is difficult to arrange a large number of them with high precision, it is a method of combining those arranged for each sensor. Although the method shown in c does not have as large a deviation of the straight line when the line sensors 1 are combined as the method shown in a, it is basically the same as the method shown in a, and continuous straight line images could not be obtained.
Tip 4 of fiber optics of the method shown in c.
When the part is enlarged, it becomes as shown in Fig. 2. In the part of the fiber optics 4, the optical fibers 6 are lined up without any gaps, but at a position away from the tip 4, they spread out in the line direction. Therefore, when assembling a plurality of fiber assemblies shown in FIG. 2, it was necessary to use the method shown in c.

The present invention has been made in order to solve the above-mentioned drawbacks of the conventional method, and therefore, an object of the present invention is to cut each fiber assembly of the conventional c-type (see FIG. 2) as shown in FIG. 3. It is an object of the present invention to provide a new combination method of a line sensor that makes it possible to align the tips 4 in a straight line by polishing and arranging a plurality of fiber assemblies.

The above object of the present invention is to arrange each side surface of a plurality of optical fibers having a thickness matching the element size of a line sensor in a straight line without any gaps and fix them in a bundle, and to fix the optical fibers fixed in the bundle in a bundle. A plurality of optical fiber bundles are prepared, one end of the optical fiber bundle is fixed so as to correspond to the element of the line sensor, and the other end of the optical fiber bundle and a side surface of the fixing means adjacent to the other end is cut diagonally, and the angles α and β formed by the end face of the other diagonally cut end of two adjacent optical fiber bundles and the cut side face satisfy α+β≦180°. This is achieved by a radiometer line sensor combination system characterized in that the bundles are aligned and fixed at the other end in a straight line.

Hereinafter, a preferred embodiment of the present invention will be explained in detail with reference to FIG.

Figures 3a and 3b are diagrams for explaining one embodiment of the present invention, and a is a plan view and an end view showing the cutting method and angle of a plurality of optical fiber bundles (four in the embodiment). , b is 4 cut as shown in a
FIG. 3 is an end view showing a state in which several optical fiber bundles are arranged and fixed in a line. In the figure, reference numbers 7, 8, 9, and 10 are the end faces of the fiber assembly (fiber bundle) processed by cutting, polishing, etc., and 11, 12, and 13 are the cutting and polishing angles.

In order to realize this method, the tip surfaces 7, 8 and side surfaces 7', 8' of the fiber assembly are machined so that the angle 11 at one end of the fiber assembly is 90 degrees or less, and the other end is Machining is done so that the angle 12 is as small as possible. At this time, the fiber assembly tip 4 is machined so that both ends coincide with both ends of the fiber,
To prevent the glass cover 5 from popping out at both ends.

9 and 10 are the angles of the ends that contact the tip surfaces 7 and 8 of the fiber assembly (the angle between the tip surface 9 and the side surface 9' and the angle between the tip surface 10 and the side surface 10') 13 is (angle 12) + (angle 13) This is the end surface of the fiber assembly processed to satisfy ≦180°. In this case as well, like the tip surfaces 7 and 8, the fiber assembly tip 4 is processed so that the angle 13 does not protrude beyond the fiber end.

FIG. 3b shows a state in which the end surfaces of the 7 to 10 fiber assemblies shown in FIG. 3a are lined up in a straight line. Fiber assembly tip faces 7, 8
9 and 10, the shapes at the tips 4 of the fibers are different as shown in FIG. Become.

Therefore, with this method, it is possible to line up a plurality of fiber assemblies in a straight line, and even in a radiometer with a wide field of view, it is possible to obtain continuous images over the entire field of view.

As explained above, even when a number of continuous sensor assemblies is required than the number of line sensor elements, and even when the required number of fiber assemblies cannot be lined up due to accuracy etc., the assembly of the present invention can be used to connect multiple sensors. It is now possible to line up individual units in a straight line, which has the advantage of allowing continuous images to be obtained even with a radiometer with a wider field of view.

Although the present invention has been described above with reference to one preferred embodiment thereof, this is merely an illustrative example, and it goes without saying that the present invention is not limited only to the embodiment described herein.

[Brief explanation of the drawing]

Figures 1a, b, and c show a conventional line sensor combination system, Figure 2 is an enlarged view of the tip of the fiber assembly, and Figures 3a and b show an embodiment of the line sensor combination system of the present invention. It is a diagram. DESCRIPTION OF SYMBOLS 1... Line sensor, 2... Line sensor package, 3... Half prism, 4... Tip of fiber optics, 5... Glass cover, 6
...Fiber, 7-10...Tip surface of fiber assembly (processing example), 7'-10'...Side surface, 11
~13... Machining angle of fiber assembly.

Claims (1)

[Claims] 1. Each side surface of a plurality of optical fibers having a thickness that matches the element size of the line sensor is arranged in a straight line without any gaps and fixed in a bundle, and the plurality of optical fiber bundles fixed in the bundle are fixed. preparing one end of the optical fiber bundle so as to correspond to the element of the line sensor, and diagonally cutting the other end of the optical fiber bundle and the side surface of the fixing means adjacent to the other end; The angles α and β formed between the obliquely cut end surfaces of the other ends of two mutually adjacent optical fiber bundles and the cut side surfaces are:
A line sensor combination method for a radiometer, characterized in that fiber bundles satisfying α+β≦180° are aligned and fixed in a straight line at the other end.