def create_cemented_doublet(power=0., bending=0., th=None, sd=1.,
glasses=('N-BK7,Schott', 'N-F2,Schott'),
**kwargs):
from opticalglass.spectral_lines import get_wavelength
from opticalglass import glass
wvls = np.array([get_wavelength(w) for w in ['d', 'F', 'C']])
gla_a = gfact.create_glass(glasses[0])
rndx_a = gla_a.calc_rindex(wvls)
Va, PcDa = glass.calc_glass_constants(*rndx_a)
gla_b = gfact.create_glass(glasses[1])
rndx_b = gla_b.calc_rindex(wvls)
Vb, PcDb = glass.calc_glass_constants(*rndx_b)
power_a, power_b = achromat(power, Va, Vb)
if th is None:
th = sd/4
t1 = 3*th/4
t2 = th/4
if power_a < 0:
t1, t2 = t2, t1
lens_a = lens_from_power(power=power_a, bending=bending, th=t1, sd=sd,
med=gla_a)
cv1, cv2, t1, indx_a, sd = lens_a
# cv1 = power_a/(rndx_a[0] - 1)
# delta_cv = -cv1/2
# cv1 += delta_cv
# cv2 = delta_cv
# cv3 = power_b/(1 - rndx_b[0]) + delta_cv
indx_b = rndx_b[0]
cv3 = (power_b/(indx_b-1) - cv2)/((t2*cv2*(indx_b-1)/indx_b) - 1)
s1 = Surface(profile=Spherical(c=cv1), max_ap=sd,
delta_n=(rndx_a[0] - 1))
s2 = Surface(profile=Spherical(c=cv2), max_ap=sd,
delta_n=(rndx_b[0] - rndx_a[0]))
s3 = Surface(profile=Spherical(c=cv3), max_ap=sd,
delta_n=(1 - rndx_b[0]))
g1 = Gap(t=t1, med=gla_a)
g2 = Gap(t=t2, med=gla_b)
g_tfrm = np.identity(3), np.array([0., 0., 0.])
ifc_list = []
ifc_list.append([0, s1, g1, 1, g_tfrm])
ifc_list.append([1, s2, g2, 1, g_tfrm])
ifc_list.append([2, s3, None, 1, g_tfrm])
ce = CementedElement(ifc_list)
tree = ce.tree()
return [[s1, g1, None, rndx_a, 1],
[s2, g2, None, rndx_b, 1],
[s3, None, None, 1, 1]], [ce], tree
def compute_principle_points(self, seq):
""" Returns paraxial p and q rays, plus partial first order data.
Args:
seq: a sequence containing interfaces and gaps to be traced.
for each iteration, the sequence should return a
list containing: **Intfc, Gap, Trfm, Index, Z_Dir**
Returns:
(p_ray, q_ray, (efl, pp1, ppk, ffl, bfl))
- p_ray: [ht, slp, aoi], [1, 0, -]
- q_ray: [ht, slp, aoi], [0, 1, -]
- efl: effective focal length
- pp1: distance of front principle plane from 1st interface
- ppk: distance of rear principle plane from last interface
- ffl: front focal length
- bfl: back focal length
"""
n_0 = seq[0][mc.Indx]
z_dir_before = seq[0][mc.Zdir]
n_k = seq[-1][mc.Indx]
z_dir_k = seq[-1][mc.Zdir]
path = [[Surface(), Gap(), None, n_0, z_dir_before]]
path.extend(seq[1:])
pp_info = fo.compute_principle_points(iter(path),
n_0=z_dir_before * n_0,
n_k=z_dir_k * n_k)
return pp_info
def compute_principle_points(self, node, seq):
n_0 = seq[0][mc.Indx]
z_dir_before = seq[0][mc.Zdir]
n_k = seq[-1][mc.Indx]
z_dir_k = seq[-1][mc.Zdir]
path = [[Surface(), Gap(), None, n_0, z_dir_before]]
path.extend(seq[1:])
pp_info = fo.compute_principle_points(iter(path),
n_0=z_dir_before * n_0,
n_k=z_dir_k * n_k)
return pp_info
def create_lens(power=0., bending=0., th=None, sd=1., med=None, **kwargs):
if med is None:
med = Glass()
lens = lens_from_power(power=power, bending=bending, th=th, sd=sd, med=med)
cv1, cv2, th, rndx, sd = lens
s1 = Surface(profile=Spherical(c=cv1), max_ap=sd, delta_n=(rndx - 1))
s2 = Surface(profile=Spherical(c=cv2), max_ap=sd, delta_n=(1 - rndx))
g = Gap(t=th, med=med)
le = Element(s1, s2, g, sd=sd)
tree = le.tree()
return [[s1, g, None, rndx, 1], [s2, None, None, 1, 1]], [le], tree
def create_lens(power=0., bending=0., th=None, sd=1., med=None):
if med is None:
med = Glass()
rndx = med.rindex('d')
cv1 = power / (2 * (rndx - 1))
cv2 = -power / (2 * (rndx - 1))
s1 = Surface(profile=Spherical(c=cv1), max_ap=sd, delta_n=(rndx - 1))
s2 = Surface(profile=Spherical(c=cv2), max_ap=sd, delta_n=(1 - rndx))
if th is None:
th = sd / 5
g = Gap(t=th, med=med)
le = Element(s1, s2, g, sd=sd)
return [[s1, g, None, rndx, 1], [s2, None, None, 1, 1]], [le]
def create_air_gap(t=0., **kwargs):
g = Gap(t=t)
ag = AirGap(g, **kwargs)
tree = ag.tree()
return g, ag, tree
def create_air_gap(t=0., ref_ifc=None):
g = Gap(t=t)
ag = AirGap(g, ref_ifc)
return g, ag
