# US 2017/0285278 A1 · Optical transmission connector device

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- Number: US 2017/0285278 A1
- Document ID: US20170285278A1
- Status: Published application
- Kind: A1
- Application number: 15/630,656
- Filed: 2017-06-22
- Published: 2017-10-05
- Earliest claimed: 2014-12-25
- Assignees: Olympus Corporation
- Applicants: Olympus Corporation
- Inventors: Ryu OTA
- Web page: https://patentgrep.com/patent/US20170285278A1

## CPC

- G02B 6/3885: {Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type (optical ribbon cable G02B6/4403, G02B6/448)}
- G02B 6/264: {with optical elements between opposed fibre ends which perform a function other than beam splitting (having lens focusing means G02B6/32; utilising prism or grating G02B6/34)}
- G02B 6/32: having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)}
- G02B 23/26: using light guides {(for illumination G02B23/2469)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

An optical transmission connector device includes: a transmission-side connector sending optical signals; and a reception-side connector receiving the optical signals sent from the transmission-side connector. The transmission-side and the reception-side connectors have: optical fibers transmitting optical signals; and optical members disposed in contact with or in the vicinity of one end surfaces of the optical fibers. The optical member of the transmission-side connector is formed so as to convert the optical signals emitted from the one end surfaces of the optical fibers into approximately parallel beams of light and so as to cause the centers of light beams of the approximately parallel beams of light to intersect at approximately one point. The optical member of the reception-side connector is formed so as to cause the optical signals converted into the approximately parallel beams of light at the optical member of the transmission-side connector to enter the separate optical fibers.

## Claims

### Claim 1

An optical transmission connector device comprising:
a transmission-side connector that sends a plurality of optical signals; and
a reception-side connector that receives the plurality of optical signals sent from the transmission-side connector,
wherein the transmission-side connector and the reception-side connector each have: a plurality of optical fibers that transmit the optical signals; and an optical member that is disposed in contact with or in the vicinity of one end surfaces of the plurality of optical fibers;
the optical member of the transmission-side connector is formed so as to convert the plurality of optical signals emitted from the one end surfaces of the optical fibers into approximately parallel beams of light and so as to cause the centers of light beams of the approximately parallel beams of light to intersect at approximately one point;
the optical member of the reception-side connector is formed so as to cause the plurality of optical signals converted into approximately parallel beams of light at the optical member of the transmission-side connector to enter the separate optical fibers;
at least one of the plurality of optical fibers are tilted with respect to an optical axis; and
the following conditional expressions (1), (2), and (3) are satisfied;
D1/D2<2 (1)
D1/2f tan(ω/2)<2 (2)
2{P+f tan(ω/2−θ)}/2f tan(ω/2)<2 (3)
where D1 is the maximum effective diameter of the optical member of the transmission-side connector, D2 is the maximum light-beam diameter of the parallel light, ω is a divergence angle of the signal light from the optical fibers, f is the focal length of the optical member, P is the distance between the optical axis and each of the optical fibers, and θ is a tilt angle of the optical fiber.