| 摘要 |
PROBLEM TO BE SOLVED: To make a parabolic reflecting mirror small. SOLUTION: Three adaptor horns constitute a horn adaptor 3. The adaptor horns at both sides of the central adaptor horn are bent outward. Thus, the three adaptor horns are placed at a short interval. Then an aperture of a parabolic reflecting mirror 2 is made small. The horn adaptor 3 is configured by fixing the upper and lower halves and designed as a separate unit from converter units 5a-5c, so that diversified combinations of them are attained. Furthermore, a chock is formed at an exit of the three adaptor horns and this chock is covered with a horn cap.
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