Optical monitor device and optical intensity measurement method

Abstract

An object of the present disclosure is to enable measurement of a light intensity beyond a limit of a measurable intensity of light receiving elements using a light receiving portion in which many light receiving elements are two-dimensionally arranged. The present disclosure is an optical monitor device that detects an intensity of light propagating through a plurality of optical fibers, the optical monitor device including: an optical component that splits a part of incident light from the plurality of optical fibers into a first direction and a rest into a second direction at a constant splitting ratio, and emits light; and a light receiving portion that receives emitted light in a second direction from the optical component, in which the light receiving portion includes a light receiving surface having a size that enables light reception of all emitted light from the optical component in the second direction, light receiving elements larger in number than the optical fibers are two-dimensionally arranged on the light receiving surface, and exposure times of the light receiving elements are variable.

Dependencies are inferred from the claim text.