Ultrasound-modulated optical tomography (UOT) has high spatial resolution of ultrasonic location and high sensitivity of optical detection. Both of scattering objects and absorption objects can be imaged by UOT. The signal to noise ratio and image contrast of UOT is improved by laying two apertures between the sample and the detector (photomultiplier tube, PMT) and choosing appropriate position of PMT. One dimensional imaging of scattering objects and absorption objects buried in turbid media is provided. The experimental results indicate that the relationship between modulation depth of ultrasound-modulated signal and the scattering and absorption properties of media is dependent on detection position of PMT. The scattering objects and absorption objects are imaged simultaneously and distinguishable when PMT is at an appropriate position.