【発明の名称】光センサ及び光センサ用光ファイバ・ネットワーク

Japanese Patent JPH01502052

A

PCT No. PCT/AU87/00399 Sec. 371 Date Sep. 23, 1988 Sec. 102(e) Date Sep. 23, 1988 PCT Filed Nov. 26, 1987 PCT Pub. No. WO88/04065 PCT Pub. Date Jun. 2, 1988.An optical sensor includes elongate light transmission means such as an optical fibre (13). A lens (16) of at least nearly half-pitch length is positioned with one of its focal planes substantially at a mouth (13a) of the optical fibre to receive and focus a diverging cone of light emergent therefrom. A reflector (20) is disposed substantially at another focal plane of the lens to reflect the focused light back to the mouth of the fibre. Detection means (14) in the path of the light between the mouth and the reflector is arranged to influence the light in response to an external condition in a manner whereby the reflected light received back at the fibre mouth may be monitored to detect the influence and thereby the condition. An optical fibre network has an incident fibre (40) and a detection fibre (42) coupled to plural optical components (60) via respective optical fibres (62) associated with the components and one or more optical fibre couplers (64, 68, 69). The network further includes means (44) to transmit along the incident fibre incident signals of close but discrete wavelengths, and means (82) associated with each of said respective optical fibres (62) to reflect a portion of each of the signals back along the fibre as a respective reference signal.

Barrow, Ross
Elias, Martin Charles
Lions, Peter Robert Ashwell
Jacob, Peter Gordon
Rushley, Scott Clarence

JP50019587A

July 13, 1989

November 26, 1987

Click for automatic bibliography generation  

THE COMMONWEALTH OF AUSTRALIA

G01D5/26; G01D21/00; G01J1/02; G01J5/08; G01K11/12; G02B6/00; G02B6/32; G02B6/36; G08C15/06; (IPC1-7): G01D5/26; G01D21/00; G01J1/02; G01J5/08; G01K11/12; G02B6/00; G08C15/06

JPS61110056A

1986-05-28

Aoki Akira (4 outside)

Previous Patent: JPH01502051

Next Patent: JPH01502053