PROBLEM TO BE SOLVED: To detect not only abnormal eggs caused by blood eggs but also abnormal eggs caused by Pseudomonas aeruginosa and stain adhesion. SOLUTION: The light including the absorption wavelength component of the blood egg from the first light source 2a and the intensity-modulated light for generating fluorescence by irradiation of Pseudomonas aeruginosa or dirt from the second light source 2b are emitted to the egg W. The light is irradiated, and the transmitted light or the diffusely reflected light is branched into two by the light branching device 3b. One of the lights has a wavelength component absorbed by the blood egg, the light of the second light source 2b, and the fluorescence generated by the second light source 2b is blocked by the first filter 3c. The optical power detector 3e detects the optical power. The other light blocks the light of the second light source 2b by the second filter 3f, transmits the light of the absorption wavelength component of blood eggs, and the fluorescence generated by the second light source 2b, and outputs a voltage signal according to the light amount. The second optical power detector 3h detects the optical power, and the optical modulated light power detector 3i detects the optical power of the intensity modulated light. The processing unit 4 determines whether the egg W is normal or abnormal based on these optical powers. [Selection diagram] Figure 1【課題】血卵による異常卵だけでなく緑膿菌や汚れ付着などによる異常卵の検出も可能にする。【解決手段】第１光源２ａからの血卵の吸収波長成分を含む光と、第２光源２ｂからの緑膿菌や汚れへの照射により蛍光を発生させるための強度変調光とを卵Ｗに照射し、透過光または拡散反射光を光分岐器３ｂにて二分岐する。一方の光は、血卵が吸収する波長成分の光、第２光源２ｂの光、第２光源２ｂにより発生した蛍光が第１フィルタ３ｃにて阻止され、その光量に応じた電圧信号から第１光パワー検出部３ｅが光パワーを検出する。他方の光は、第２フィルタ３ｆにて、第２光源２ｂの光を阻止し、血卵の吸収波長成分の光、第２光源２ｂにより発生した蛍光を透過し、その光量に応じた電圧信号から第２光パワー検出部３ｈが光パワーを検出し、光変調光パワー検出部３ｉが強度変調光の光パワーを検出する。処理部４は、これら光パワーを元に卵Ｗが正常か異常かを判断する。【選択図】図１
