| 摘要 |
A body 1 having a hollow internal volume 4 has a first wall 2 having means for receiving and for holding the outermost part terminated by an outermost face 3 of optical fibres F1, F2, etc., one F1 of which is an input fibre whereas the opposite wall 5 contains a plurality of mirrors or concave spherical mirror fractions 6A, 6B which each form an image of the first fibre F1 on a respective second fibre F2, F3. <IMAGE>
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