Added AbstractSensor.width_active property. (#35)

Author: roytsmart

msfc_ccd/_sensors.py

@@ -52,6 +52,12 @@ def num_pixel_active(self):
     def width_pixel(self) -> u.Quantity:
         """The physical size of a single pixel on the imaging sensor."""
 
+    @property
+    def width_active(self):
+        """The physical size of the light sensitive area of the sensor."""
+        result = self.width_pixel * self.num_pixel_active
+        return result.to(u.mm)
+
     @property
     @abc.abstractmethod
     def num_blank(self) -> int:

msfc_ccd/_tests/test_sensors.py

@@ -25,6 +25,9 @@ def test_serial_number(self, sensor: msfc_ccd.abc.AbstractSensor):
     def test_width_pixel(self, sensor: msfc_ccd.abc.AbstractSensor):
         assert sensor.width_pixel > 0 * u.um
 
+    def test_width_active(self, sensor: msfc_ccd.abc.AbstractSensor):
+        assert sensor.width_active > 0 * u.um
+
     def test_num_pixels(self, sensor: msfc_ccd.abc.AbstractSensor):
         assert sensor.num_pixel.x > 0
         assert sensor.num_pixel.y > 0