FILTER UNIT

WIPO Patent Application WO/2024/116671

A1

This filter unit comprises: a support having a light passing part; a Fabry-Perot interference filter which is superposed on the light passing part when viewed in a first direction; and a wiring board which is not superposed on the Fabry-Perot interference filter when viewed in the first direction. First and second recesses formed in the support are arrayed in a second direction. The Fabry-Perot interference filter is disposed in the first recess. The wiring board is disposed in the second recess. Regarding the width Wf of the Fabry-Perot interference filter in a third direction, the width Ws of the wiring board in the third direction, the width W1 of the first recess in the third direction, and the width W2 of the second recess in the third direction, a relationship of "Wf≤W1