Testing apparatus and testing method

A detection apparatus, comprising a carrying platform, a light source device, a first objective, a second objective, an objective lens switching device and a measuring device, wherein:

• the carrying platform is configured to carry a sample to be detected;
• the light source device is configured to emit detection light;
• the first objective is configured to receive the detection light and form first measurement light and first reference light, wherein the first measurement light, after being reflected by the sample to be detected, interferes with the first reference light;
• the second objective is configured to converge the detection light on a surface of the sample to be detected to form second measurement light;
• the objective lens switching device is configured to switch between the first objective and the second objective to control the first objective or the second objective to be in an optical path;
• and
• the measuring device is configured to obtain height information of the sample to be detected based on the first measurement light reflected by the sample to be detected and the first reference light, and obtain structure information of the sample to be detected based on the second measurement light,
• wherein the measuring device comprises a first measuring device configured to obtain imaging information of the sample to be detected based on the second measurement light reflected by the sample to be detected.