57 lines
2.4 KiB
Python
57 lines
2.4 KiB
Python
from .AHotOpticalComponent import AHotOpticalComponent
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from ..SpectralQty import SpectralQty
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from ..IRadiant import IRadiant
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from astropy import units as u
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from typing import Union
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class Lens(AHotOpticalComponent):
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"""
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A class to model the optical characteristics of a lens.
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"""
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@u.quantity_input(temp=[u.Kelvin, u.Celsius], obstructor_temp=[u.Kelvin, u.Celsius])
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def __init__(self, parent: IRadiant, transmittance: str,
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emissivity: Union[int, float, str] = 1, temp: u.Quantity = 0 * u.K,
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obstruction: float = 0, obstructor_temp: u.Quantity = 0 * u.K, obstructor_emissivity: float = 1):
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"""
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Instantiate a new lens model
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Parameters
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----------
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parent : IRadiant
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The parent element of the optical component from which the electromagnetic radiation is received.
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transmittance : str
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The spectral transmittance coefficients of the filter.
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emissivity : Union[int, float, str]
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The spectral emissivity coefficient for the optical surface.
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temp: Quantity in Kelvin / Celsius
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Temperature of the optical component
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obstruction : float
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The additional obstruction factor of the optical component. 0 means the component is not obstructed, 1
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denotes a completely obstructed component with therefore no incoming flux. It is important to note, that
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the obstruction factor reflects the obstruction of the optical component additionally to the obstruction
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factors of the prior elements in the beam.
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obstructor_temp : Quantity in Kelvin / Celsius
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Temperature of the obstructing component.
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obstructor_emissivity : float
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Emissivity of the obstructing component.
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"""
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self._transmittance = SpectralQty.fromFile(transmittance, u.nm, u.dimensionless_unscaled)
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super().__init__(parent, emissivity, temp, obstruction, obstructor_temp, obstructor_emissivity)
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def _propagate(self, rad: SpectralQty) -> SpectralQty:
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"""
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Propagate incoming radiation through the optical component
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Parameters
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----------
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rad : SpectralQty
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The incoming radiation
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Returns
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-------
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rad : SpectralQty
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Manipulated incoming radiation
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"""
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return rad * self._transmittance
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