PROBLEM TO BE SOLVED: To provide a light source control device, an ophthalmologic apparatus, and a light source control method which can control the quantity of light to be projected onto an object to be measured without causing upsizing of the optical system and decrease of the light quantity.SOLUTION: The light source control device includes: a light bifurcation unit for bifurcating output light from a wavelength sweeping light source into first output light and second output light； a combined-light creation unit for bifurcating the first output light into first bifurcated light and second bifurcated light, and combines the first bifurcated light and the second bifurcated light, which are routed through their respective optical paths with optical path lengths different from each other, to create combined light； a light receiving unit for receiving the combined light； and a light source control unit for controlling the light quantity of the output light on the basis of a result of light receiving by the light receiving unit.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2019,JPO&INPIT【課題】光学系の大型化や光量の低下を招くことなく、被測定物体に照射される光の光量を制御することが可能な光源制御装置、眼科装置、及び光源制御方法を提供する。【解決手段】光源制御装置は、波長掃引光源からの出力光を第１出力光と第２出力光とに分岐する光分岐部と、第１出力光を第１分岐光と第２分岐光とに分岐し、互いに光路長が異なる光路を経由した第１分岐光と第２分岐光とを合成して合成光を生成する合成光生成部と、合成光を受光する受光部と、受光部による受光結果に基づいて出力光の光量を制御する光源制御部と、を含む。【選択図】図３
