光學衰減濾鏡(ND filter)

光學衰減鏡片 利用薄膜工藝吸收入射光強度,達到降低及控制光強度的功能。
使用於各種光學儀器、燈源亮度控制、照相系統、影像系統、雷射設備等等..
依據客戶需求可製作衰減比例不同的效果：
Neutral density filters are useful in a number of applications such as attenuators for broadband spectral sources, partial reflectors for light balancing applications and for use as neutral beamsplitters. Metallic type neutral density filters obtain their optical density by depositing a metal alloy coating onto a specific type of substrate which is determined by the wavelength region. ND filters are produced using optical glass, and rely strictly on the absorptive effects of the glass to obtain the desired attenuation level. 

 Transmittance 80%   Transmittance 70%   Transmittance 60%

 Transmittance 50%   Transmittance 40%   Transmittance 30%

 Transmittance 20%   Transmittance 10%   Transmittance  5%