Method and apparatus for adjusting exposure time of camera and device based on energy value when camera collecting an imaging light spot

An apparatus for adjusting an exposure time of a camera, applied to determine whether multiple optical modules to be aligned in an imaging component are aligned or not, comprising:

• a memory storing instructions;
• and
• a processor configured to execute the instructions to:
• control the camera to collect an imaging light spot of the imaging component with a first exposure time;
• obtain an energy value received by a photosensitive element in the camera when the camera collecting the imaging light spot;
• in response to the energy value being within a set energy range, using the first exposure time as an optimal exposure time of the camera collecting the imaging light spot;
• in response to the energy value being higher than an upper limit of the set energy range, reducing the duration of the first exposure time by a set amount to update the first exposure time;
• in response to the energy value being lower than a lower limit of the set energy range, increasing the duration of the first exposure time by the set amount to update the first exposure time;
• and
• repeatedly controlling the camera to collect the imaging light spot of the imaging component with the updated first exposure time, until an updated energy value is within the set energy range, wherein when each time repeatedly controlling, an imaging brightness of the imaging component is controlled to be constant.