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减反射膜(增透膜)，减少或消除透镜、棱镜、平面镜等学表面的反射光，增加元件透光量，减少或消除系统杂散光。
减反射膜以光的波动性和干涉现象为基础。二个振幅，波长相同的光波叠加，光波的振幅增强；二个光波原由相同，波程相差，二个光波叠加，那么互相抵消。镜片表面镀上减反射膜
(AR-coating
），膜层前后表面产生的反射光互相干扰，抵消反射光，达到减反射效果。在单波长实现零反射
,在较宽的光谱区达到好的增透效果，則采双层、三层及多层减反射膜。
应用在镜片及太阳能电池 -
通过制备减反射膜提高光伏组件功率瓦值。晶体硅光伏电池使用的减反射膜是氮化硅，可采等离子增强化学气相淀积，使氨气和硅烷离子化，沉积在硅片表面，有高的折射率，好的减反射效果。光伏电池采用二氧化硅和二氧化钛膜作减反射层。
The refractive index of
a typical commercially
available microlens film
is approximately 1.6 in
the visible spectrum of
light. When light is
incident from air to the
lens surface,
significant reflections
can occur due to the
large refractive index
mismatch. An overcoat
layer with a suitable
refractive index and
film thickness can be
used to effectively
suppress reflections
thus increasing the
amount of light received
by the sensor. the
reflectance for an
air/overcoat/microlens
layer as a function of
overcoat thickness and
refractive index.
Although both the
microlens and overcoat
layers were assumed to
be flat and fully
transparent in the
calculations, a good
approximation of the
reflectance as a
function of film
thickness, refractive
index and incident
wavelength can be made.
The film thickness as
well as refractive index
of the overcoat needs to
be optimized to achieve
minimum reflectance. The
lowest reflectance for
normally incident light
is reached when the
optical thickness of the
film is exactly one
quarter of the incident
wavelength satisfying
the condition for
destructive
interference. The
highest reflectance,
which is equal to having
no overcoat, on the
other hand is achieved
when the film thickness
is half of the incident
wavelength in which case
constructive
interference occurs. The
optimum refractive index
and film thickness
values for an
anti-reflection coating
on a microlens layer
with refractive index of
1.60 were calculated to
be 1.26 and 126 nm,
respectively. The
calculation was done at
633 nm wavelength.
The lowest reflectance
for normally incident
light is reached at 633
nm for which the
anti-reflection coating
was optimized to. Both
longer and especially
shorter wavelengths can
however be seen to have
increased reflectance.
This is due to the fact
that the quarter
wavelength thickness
rule cannot be satisfied
for all wavelengths
simultaneously leading
to incomplete
destructive interference
due to phase changes
between light reflected
from the surface of the
anti-reflection coating
and the underlying film.
The angle of incident
light also affects the
amount of reflected
light because the
distance light travels
in the anti-reflection
coating material changes
which again leads to
phase changes. Despite
the above, the overcoat
layer still manages to
significantly reduce the
reflectance across the
visible spectrum.
The AR materials are a
silica sol and the
particle size is the
same as one tenth of the
visible light
wavelength. These are
necessary materials
which enhance the
anti-reflection property
for CRT glass panels, as
well as plastic lens &
film.
波長：紫外，可見光，紅外線
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Specification
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AT50
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MB215
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Ave. Particle Size(nm)
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60
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40
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Bulk Density
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0.63
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0.35
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Color
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Clear
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Clear
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B.E.T(m2/g)
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10~15
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10~15
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防反射塗層的太陽能光熱接收管和光伏電池板
Generation of
wet-chemical AR-coatings
on plastic substrates by
use of polymerizable
nanoparticles
If you don't find what you're looking for,
Contact Us.
We may have a suitable product that's not listed, or we may be
able to develop a material to fit your specific needs.
Tel : (02)2217-3442 / Fax : (02)2704-4070
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