Blood vessel image locating system

A blood vessel image locating system, characterized in that said blood vessel image locating system comprises a blood vessel image enhancing device and an image projection device for use in combination with the enhancing device, a transmission light emitted by said enhancing device penetrates through a test portion on a surface of a human body;

• said enhancing device comprises a first light emitting unit and a drive unit driving the first light emitting unit to emit light, the wavelength of the light emitted by the first light emitting unit is 730 nm to 990 nm;
• the drive unit comprises a power supply and a drive circuit connecting the power supply and the first light emitting unit;
• the image projection device further comprises a second light emitting unit, said second light emitting unit is used to emit exciting light to the test portion on the surface of the human body and conduct diffuse reflection on the test portion of the human body, the diffuse reflection light and the transmission light penetrating through the test portion on the surface of the human body are both received by the image projection device and subjected to an image processing, and an image combining the diffuse reflection light and the transmission light is projected to the test portion on the surface of the human body to provide an in situ imaging.