Detection system and a portable detection device

A portable detection device, for detecting an object of interest in a lateral flow immunoassay strip, wherein the lateral flow immunoassay strip comprises a detection carrier and a reporter, the detection carrier comprising a control zone and a test zone, the portable detection device comprising:

• a laser light source, for providing a laser light, wherein the laser light is a continuous-wave green laser or a red laser;
• a scanning and spatial modulation module, for receiving the laser light and then providing a scanning and spatially modulating laser beam for irradiating the reporters on the control zone and the test zone to generate a detecting signal, wherein the scanning and spatially modulating laser beam is produced by a reflection mirror rotating driven by a stepper motor;
• a signal acquisition assembly, receiving the detecting signal, wherein the signal acquisition assembly comprising a photodiode with a fluorescence filter configured to selectively detect the fluorescence signal, wherein the orange filter is selected for detecting the fluorescence signal while the laser light is the continuous-wave green laser;
• a processing device, electronic connecting to the signal acquisition assembly, wherein the processing device receives the detecting signal from the signal acquisition assembly;
• and a housing for accommodating the laser light source, the scanning and spatial modulation module, the signal acquisition assembly, and the processing device.