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FOV and speed calculator

Selecting appropriate lens​

  • All qtec camera heads are made with the C-mount type lens mount.
  • Check the sensor list in order to determine the required lens size (based on sensor size)
  • Remember to select a lens with the appropriate resolution (pixel size)
    • A low resolution lens can result in the blurring of pixels

Calculating FOV and framerate​

Formulas​

  • focal_length[mm] / sensor_size[mm] = distance_to_object[mm] / field_of_view[mm]
  • sensor_size[mm] = sensor_size[px]*pixel_size[um]*1000
  • resolution[mm/px] = field_of_view[mm] / sensor_size[px]
  • field_of_view[deg] = 2 * atan2(sensor_size[mm]/2, focal_length[mm]) * 180/PI
  • sensor_size_y[px] = slit_size[um] / pixel_size[um]
  • framerate = 1 / (resolution[mm/px] / belt_speed[mm/s]) for keeping aspect ratio
  • framerate = 1 / (sensor_size_y[px] * resolution[mm/px] / belt_speed[mm/s]) for 1 to 1 sampling
  • motion_blur[mm] = belt_speed[mm/s] * exp_time[s]
  • motion_blur[px] = motion_blur[mm] / resolution[mm/px]
  • max_bands[lines] = (1/fps - B) / A, where A and B depend on the sensor type and bit mode