projector's light can't walk through polarizer or circular

[guge2]

I am simulating a scan system. Use a projector and camera, everything going on util polarization are needed, there are some code of me:

'filter1_shape': {
      'type': 'obj',
      'id': 'filter1',
      'filename': str(data_root / '../scenes_mitsuba/meshes/rectangle.obj'),
      'bsdf': {
          'type': 'circular',
          'left_handed': False
      },
      'to_world': mi.ScalarTransform4f().translate([0, 10, -object_mean_distance+100])\
                  .scale(20*scale_to_meter).rotate([0, 0, 1], angle=45)\
                  .rotate([0, 1, 0], angle=180)
  },
"emitter": {
      "type": "projector",
      "irradiance": {
          "type": "bitmap",
          "filename": photo_abs_root
      },
      "scale": 0.05 * 1000000 / scale_to_meter / scale_to_meter,
      "to_world": proj_transform,
      "fov": fov_proj
  }

nomatter use polarizer or circular;
nomatter put filter before my projector how far between projector and object;
nomatter turn every degree;
nomatter what intensity I set;
the projector's light can't through the filter, the filter: rectangle.obj is a slice, download from official example: meshes/rectangle.obj.

why, help please, I'm gonna cry now.