To provide a specification capable of switching a mode between a plurality of imaging modes with different imaging range while avoiding size increase of a device.SOLUTION: An imaging device comprises: a coupler 1113 for branching a light from a light source 1111 into a measurement light and a reference light； an optical member of an optical path L2 for radiating a line-shaped measurement light to an eyeground Er of an eye to be examined E being a measurement target； a line camera 1142 for detecting an interference light which is acquired by interference between a return light of the line-shaped measurement light from the eyeground Er of the eye to be examined E, and the line-shaped reference light； and a whole control part 1310 for changing a line width of the measurement light to be radiated to the eyeground Er of the eye to be examined E by the optical member of the optical path L2, for every imaging mode in the plurality of imaging modes in which the imaging range of the eyeground Er of the eye to be examined E is different from each other.SELECTED DRAWING: Figure 1【課題】装置の大型化を回避しつつ、撮影範囲が異なる複数の撮影モードを切り替える撮影を行える仕組みを提供する。【解決手段】光源１１１１からの光を測定光と参照光とに分岐するカプラ１１１３と、測定対象である被検眼Ｅの眼底Ｅｒに対してライン状の測定光を照射する光路Ｌ２の光学部材と、被検眼Ｅの眼底Ｅｒからのライン状の測定光の戻り光とライン状の参照光とを干渉させることにより得られる干渉光を検出するラインカメラ１１４２と、被検眼Ｅの眼底Ｅｒの撮影範囲が異なる複数の撮影モードにおける撮影モードごとに、光路Ｌ２の光学部材によって被検眼Ｅの眼底Ｅｒに照射する測定光のライン幅を変更する制御を行う全体制御部１３１０を備える。【選択図】図１
