| 摘要 |
PURPOSE:To place all parts so as to contact tightly with each other, and to obtain a compact constitution by providing a saw tooth-like inclined surface on the side face of a plate glass, forming a filter on this inclined surface, and sticking a prism. CONSTITUTION:A saw tooth-like inclined surface is provided on two surfaces opposed to each other of a plate glass 7. On each inclined surface provided on one surface of them, BPFs 3, 4, 5 and 6 for making only a light lambda1, lambda2, lambda3 and lambda4 grown successively transmit and reflecting a light of other wavelength are formed, and on each inclined surface provided on other surface, a mirror 8 is formed. On each inclined surface on which the BPF and the mirror are formed, a prism 9 having the same angle as an inclined angle of each inclined surface is stuck, respectively, and a glass block 10 is constituted. Refractive index distribution type lenses 11a-11e having a refractive index distribution which becomes small in proportion to square toward the diameter direction from the optical axis are placed on the side face of the glass block 10. Optical fibers 1a- 1e are connected to one end face of the refractive index distribution type lenses 11a-11e. |
