The present invention in reducing the influence of leakage light as much as possible high S / N ratio of the desired The provision of the acquisition possible spectral image acquisition device a spectral image of wavelength. A spectral characteristic by changing either the surface spacing and angle between the pair of optical substrates and the spectral element 1 of the variable, the transmission wavelength setting section 2 for setting the wavelength of light which transmits the spectral element 1, set The first control and the spectral characteristics of the absence of transmission peak within a wavelength band that constitutes the light from the subject 10 for controlling the spectral element 1 on the spectral characteristic of the transmission peak in the vicinity of the set wavelengths through the part 2 is present a spectroscopic element control unit 3 and a second control for controlling the spectral element 1 is switched by changing the lattice distance and angle between the pair of optical substrates, image acquisition for acquiring an image of the light transmitted through the spectral element 1 the difference between the parts 4, and the second image acquiring unit 4 has acquired during the second control by the control unit 3 and the first image acquiring unit 4 has acquired during the first control of the controller 3 I and an image correction processing unit 5 that obtains a. .BACKGROUND 1【課題】漏れ光の影響を極力低減し高S/Nで所望の波長の分光画像を取得可能な分光画像取得装置の提供。【解決手段】一対の光学基板同士の面間隔及び角度のいずれかを変えて分光特性が可変の分光素子1と、分光素子1が透過させる光の波長を設定する透過波長設定部2と、設定部2を介して設定された波長の近傍に透過ピークが存在する分光特性に分光素子1を制御する第1の制御と被写体10からの光を構成する波長帯域内に透過ピークを存在させない分光特性に分光素子1を制御する第2の制御とを一対の光学基板同士の面間隔及び角度を変化させることで切替える分光素子制御部3と、分光素子1を透過した光の画像を取得する画像取得部4と、制御部3による第1の制御の際に取得部4が取得した第1の画像と制御部3による第2の制御の際に取得部4が取得した第2の画像との差分を取得する画像補正処理部5とを備えている。【選択図】図1
