diff --git a/laser_detector.py b/laser_detector.py
index 32db2fe..fe132c7 100644
--- a/laser_detector.py
+++ b/laser_detector.py
@@ -1,4 +1,5 @@
-from maix import camera, image, time
+from maix import image, time
+from camera_manager import camera_manager
 
 _USE_CV = False
 try:
@@ -106,14 +107,8 @@ def find_brightest_bytes(frame, cx, cy, roi_r, th, ratio):
     return final_pos
 
 
-def get_stable_laser_point(cam=None, timeout_ms=15000, stable_count=STABLE_COUNT):
+def get_stable_laser_point(timeout_ms=15000, stable_count=STABLE_COUNT):
     own_cam = False
-    if cam is None:
-        try:
-            cam = camera.Camera(WIDTH, HEIGHT)
-            own_cam = True
-        except Exception:
-            return None
     try:
         last_pos = None
         stable = 0
@@ -122,7 +117,7 @@ def get_stable_laser_point(cam=None, timeout_ms=15000, stable_count=STABLE_COUNT
         while True:
             if abs(time.ticks_diff(time.ticks_ms(), start)) > timeout_ms:
                 return None
-            frame = cam.read()
+            frame = camera_manager.read_frame()
             if frame is None:
                 time.sleep_ms(10)
                 continue