add comment to explain reference_ratio_y_axis_list / reference_ratio_…

…z_axis_list

s2e-ff/data/initialize_files/components/qpd_sensor_csv_files/qpd_sensor_reference.csv

@@ -1,4 +1,4 @@
-displacement[m],reference_ratio_y_axis_,reference_ratio_z_axis
+displacement[m],reference_ratio_y_axis_list,reference_ratio_z_axis_list
 -4.00e-3,1,-1
 -3.99e-3,1,-1
 -3.98e-3,1,-1

s2e-ff/data/initialize_files/components/quadrant_photodiode_sensor.ini

@@ -2,6 +2,10 @@
 // This quadrant photodiode sensor is a sensor that observes position displacement on 
 // the y-z plane in the component coordinate system. 
 // The x-axis is the direction normal to the plane of sensitivity of the quadrant photodiode sensor.
+// The output values of this quadrant photodiode sensor is listed as follows:
+// qpd_sensor_output_y_axis_V  :  This value changes corresponding to the displacement in the y-axis direction. 
+// qpd_sensor_output_z_axis_V  :  This value changes corresponding to the displacement in the z-axis direction.
+// qpd_sensor_output_sum_V     :  This value changes corresponding to the sum of the light intensity of a laser beam.
 
 quaternion_b2c(0) = 0.0
 quaternion_b2c(1) = 0.0
@@ -12,9 +16,10 @@ position_b_m(0) = -0.5
 position_b_m(1) = 0
 position_b_m(2) = 0.012
 
-// To observe position variation, a converter is needed to calculate position variation
-// based on the values output from the quadrant sensors.
+// It is required to have a position calculation converter based on the output values of the quadrant sensors.
 // The following file contains the arrays required to determine the position displacements.
+// reference_ratio_y_axis_list : List of `qpd_sensor_output_y_axis_V / qpd_sensor_output_sum_V` at each point on the y-axis.
+// reference_ratio_z_axis_list : List of `qpd_sensor_output_z_axis_V / qpd_sensor_output_sum_V` at each point on the z-axis.
 qpd_sensor_file_directory = ../../data/initialize_files/components/qpd_sensor_csv_files/
 
 qpd_sensor_radius_m = 3.9e-3