Customer Service Department
HUVITZ Co.,Ltd
2013. 08. 16
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•6
Blue filter
Vacancy
Heat absorption filter
(IR)
ND(25%) filter
(Gray)
Green filter
① The cobalt blue filter is used in conjunction with fluorescein dye.
② The green filter (red-free) obscures anything that is red, thus blood
vessels or hemorrhages appear black.
③ Neutral Density filter (ND) is to reduces the amount of light.
④ Heat absorption (IR) filter is mainly used in lighting systems to absorb
the heat from a light source.
Illumination System – Filter 1
•4
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