def thin_bladed_receiver(width, height, absorptivity, blades):
"""
Constructs lambertian receiver consisting of thin blades.
"""
front = Surface(RectPlateGM(width, height),opt.LambertianReceiver(absorptivity),location=r_[0.,width/-2.,0.],rotation=general_axis_rotation(r_[1,0,0],N.pi/2))
n = 0
front.axis = [1,0,0]
front.tilt = N.pi/2
crit_ls = []
crit_ls.append(front)
while n < blades:
blade = Surface(RectPlateGM(width, height),opt.LambertianReceiver(absorptivity),location=r_[width/2-(n*width/(blades-1)),0.,0.],rotation=general_axis_rotation(r_[0,1,0],N.pi/-2))
blade.number = n+1
blade.axis = [0,1,0]
blade.tilt = N.pi/2
crit_ls.append(blade)
n += 1
rec_obj = AssembledObject(surfs=crit_ls)
#obj.surfaces_for_next_iteration = types.MethodType(surfaces_for_next_iteration, obj, obj.__class__)
return rec_obj, obj_ls, crit_ls
