Light sensor, and detecting mechanism and light-measuring mechanism in analyzing device

A light-measuring mechanism for a test tool, comprising:

• one or more light-emitting units for emitting light onto a test tool used for analyzing a sample;
• and one or more light-receiving units for receiving reflection light from the test tool;
• wherein the one or more light-emitting units and the one or more light-receiving units are disposed such that a light emission axis of the one or more light-emitting units and a light reception axis of the one or more light-receiving units are parallel or substantially parallel to each other.

A detecting mechanism of a test tool for detecting whether or not a test tool exists in a target area, comprising:

• a light-emitting unit for emitting light toward the target area;
• and a light-receiving unit for receiving reflection light from the test tool;
• wherein the light-receiving unit is constituted to receive light that is reflected regularly by the test tool selectively, among the light emitted by the light-emitting unit.

A detecting mechanism of a test tool for detecting whether or not a test tool exists in a target area, comprising:

• a light-emitting unit for emitting light toward the target area;
• and a light-receiving unit for receiving reflection light from the test tool;
• wherein at least one of light traveling toward the target area from the light-emitting unit and light traveling toward the light-receiving unit from the target area is refracted.