Spectrometer

Abstract

A spectrometer including a housing, a light input element, a collimating mirror, a reflective grating, a focusing mirror and an optical sensing module is provided. The housing has a first side wall, a second side wall, a third side wall, a fourth side wall connected to each other and an accommodating space. The accommodating space is square. The light input element is used to receive a light to be measured. The collimating mirror faces the light input element with its functional side to receive and collimate the light to be measured. The reflective grating faces the collimating mirror with its functional side to receive and split the collimated light to be measured. The focusing mirror faces the reflective grating with its functional side to receive and focus the light to be measured after splitting. The optical sensing module is located in a corner space formed by the first side wall and the fourth side wall.

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