The present invention discloses a photoplethysmography (PPG) signal optical imaging device and an optical measurement method. The PPG signal optical imaging device comprises a light emitting unit, a condenser unit, a beam splitter unit, an image sensing unit, and an image analysis unit. The light emitting unit provides a light signal. The condenser unit receives the light signal and transforms the light signal into a parallel light. The beam splitter unit receives the parallel light and reflects it to a tested region. The image sensing unit receives a light signal reflected from the tested region and converts it into image signals. The image analysis unit is connected with the image sensing unit and analyzes the image signals to obtain PPG signals of the tested region. The optical imaging device may be optionally arranged in an anti-light pollution unit to prevent optical noise interference and obtain higher measurement precision.一種光體積變化訊號之光學成像裝置及其光學量測方法,包括有:一光發射單元、一聚光鏡單元、一分光鏡單元、一影像感測單元以及一影像分析單元。光發射單元提供一光訊號。聚光鏡單元接收光訊號,並將其轉換為一平行光。分光鏡單元接收平行光,並將其反射至待測部位。影像感測單元接收自待測部位所反射出之光訊號,以將其轉換為影像訊號。影像分析單元連接於影像感測單元,並且分析影像訊號,以取得待測部位之光體積變化訊號。上述之光學成像裝置更可選擇設置於一防光害單元中,藉此杜絕光雜訊之干擾,獲得較佳之量測精度。1...待測部位101...光發射單元102...聚光鏡單元103...分光鏡單元104...防光害單元105...影像感測單元106...影像分析單元
