Title:
OPTICAL COMBINER
Document Type and Number:
WIPO Patent Application WO/2020/225957
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an optical combiner for coupling lights having markedly different wavelengths. The present invention is an optical combiner which uses a gradient-index lens, for emitting, from an emission-end surface 11B, light which is incident on an incidence-end surface 11A, wherein partial regions 11A_101, 11A_102, 11A_103 at different distances z101, z102, z103 from the emission-end surface 11B of the gradient-index lens are provided in the incidence-end surface 11A of the gradient-index lens, and the wavelength collected in the optical axis 12 of the emission-end surface 11B is established in advance for each partial region 11A_101, 11A_102, 11A_103.
Inventors:
ARISHIMA KOICHI (JP)
NAKAHARA MOTOHIRO (JP)
NAKAHARA MOTOHIRO (JP)
Application Number:
PCT/JP2020/006506
Publication Date:
November 12, 2020
Filing Date:
February 19, 2020
Export Citation:
Assignee:
NAKAHARA OPTO ELECTRONICS LABORATORIES INC (JP)
International Classes:
G02B6/32; G02B6/293
Foreign References:
| US6011885A | 2000-01-04 | |||
| US5892868A | 1999-04-06 | |||
| US6219477B1 | 2001-04-17 |
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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