通过旋转滤光片角度可调节OD值
圆形、OD值连续可调
工作波长：240-1200 nm
增透膜：350 nm-700 nm
增透膜：650-1050 nm
通过旋转或平移实现不同光密度的切换
OD范围（圆形）：0.04~1.0（8阶）、0.04~3.0（8阶）或0.04~4.0（10阶）
OD范围（矩形）：0.3~2.0（5阶）
通过旋转角度可调节OD值
Ø50 mm滤光片轮
连续型和阶跃式可选
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