How to use the raytracing.Space function in raytracing

obj = Objective(f=10, NA=0.8, focusToFocusLength=60, backAperture=18, workingDistance=2, label="Objective")
print("Focal distances: ", obj.focalDistances())
print("Position of PP1 and PP2: ", obj.principalPlanePositions(z=0))
print("Focal spots positions: ", obj.focusPositions(z=0))
print("Distance between entrance and exit planes: ", obj.L)

path = ImagingPath()
path.fanAngle = 0.0
path.fanNumber = 1
path.rayNumber = 15
path.objectHeight = 10.0
path.label = "Demo #14 Path with generic objective"
path.append(Space(180))
path.append(obj)
path.append(Space(10))
path.display()

'''


path = LaserPath()
path.label = "Demo #18: Laser beam and vendor lenses"
path.append(Space(d=50))
path.append(thorlabs.AC254_050_A())
path.append(Space(d=50))
path.append(thorlabs.AC254_050_A())
path.append(Space(d=150))
path.append(eo.PN_33_921())
path.append(Space(d=50))
path.append(eo.PN_88_593())
path.append(Space(d=180))
path.append(olympus.LUMPlanFL40X())
path.append(Space(d=10))
path.display()

from raytracing import ImagingPath, Space, Lens, Aperture

'''
    Demo #9 - Infinite telecentric 4f telescope
'''


path = ImagingPath()
path.label = "Demo #9: Infinite telecentric 4f telescope"
path.append(Space(d=5))
path.append(Lens(f=5))
path.append(Space(d=10))
path.append(Lens(f=5))
path.append(Space(d=5))
path.display()

from raytracing import ImagingPath, Space, ThickLens

'''
Demo #11 - Thick diverging lens
'''


path = ImagingPath()
path.label = "Demo #11: Thick diverging lens"
path.objectHeight = 20
path.append(Space(d=50))
path.append(ThickLens(R1=-20, R2=20, n=1.55, thickness=10, diameter=25, label='Lens'))
path.append(Space(d=50))
path.display()

from raytracing import ImagingPath, Space, Lens

'''Demo #3 - A finite lens
   An object at z=0 (front edge) is used with default properties (see Demo #1). Notice the aperture stop (AS)
   identified at the lens which blocks the cone of light. There is no field stop to restrict the field of view,
   which is why we must use the default object and cannot restrict the field of view. Notice how the default
   rays are blocked.'''


path = ImagingPath()
path.label = "Demo #3: Finite lens"
path.append(Space(d=10))
path.append(Lens(f=5, diameter=2.5))
path.append(Space(d=3))
path.append(Space(d=17))
path.display()

from raytracing import ImagingPath, Space, Lens, Aperture


'''
    Demo #8 - Virtual image at -2f with object at f/2
'''


path = ImagingPath()
path.label = "Demo #8: Virtual image at -2f with object at f/2"
path.append(Space(d=2.5))
path.append(Lens(f=5))
path.append(Space(d=10))
path.display()

from raytracing import ImagingPath, Space, DielectricInterface

'''
Demo #12 - Thick diverging lens built from individual elements
'''


path = ImagingPath()
path.label = "Demo #12: Thick diverging lens built from individual elements"
path.objectHeight = 20
path.append(Space(d=50))
path.append(DielectricInterface(R=-20, n1=1.0, n2=1.55, diameter=25, label='Front'))
path.append(Space(d=10, diameter=25, label='Lens'))
path.append(DielectricInterface(R=20, n1=1.55, n2=1.0, diameter=25, label='Back'))
path.append(Space(d=50))
path.display()

'''
Demo #17 - Vendor Lenses
'''


path = ImagingPath()
path.label = "Demo #17: Vendor Lenses"
path.append(Space(d=50))
path.append(thorlabs.AC254_050_A())
path.append(Space(d=50))
path.append(thorlabs.AC254_050_A())
path.append(Space(d=150))
path.append(eo.PN_33_921())
path.append(Space(d=50))
path.append(eo.PN_88_593())
path.append(Space(180))
path.append(olympus.LUMPlanFL40X())
path.append(Space(10))
path.display()

'''


path = ImagingPath()
path.label = "Demo #17: Vendor Lenses"
path.append(Space(d=50))
path.append(thorlabs.AC254_050_A())
path.append(Space(d=50))
path.append(thorlabs.AC254_050_A())
path.append(Space(d=150))
path.append(eo.PN_33_921())
path.append(Space(d=50))
path.append(eo.PN_88_593())
path.append(Space(180))
path.append(olympus.LUMPlanFL40X())
path.append(Space(10))
path.display()

from raytracing import ImagingPath, Space, Lens

'''Demo #1 - An object at z=0 (front edge) is used. It is shown in blue. The image (or any intermediate images) are shown in red.\n\
This will use the default objectHeight and fanAngle but they can be changed with:
path.objectHeight = 1.0
path.fanAngle = 0.5
path.fanNumber = 5
path.rayNumber = 3'''


path = ImagingPath()
path.label = "Demo #1: lens f = 5cm, infinite diameter"
path.append(Space(d=10))
path.append(Lens(f=5))
path.append(Space(d=10))
path.display()