Neutral Density Filter
UPT can offer neutral density filters, Neutral density filters attenuate, split or combine beams in a range of irradiance ratios with little dependence on wavelength. Applications: Imaging Systems, P..
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Neutral Density Filter
UPT can offer neutral density filters, Neutral density filters attenuate, split or combine beams in a range of irradiance ratios with little dependence on wavelength.
Applications: Imaging Systems, Projection Systems
Specifications:
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Material:
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Optical Neutral Density Glass
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Typical Diameter (Φmm)
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10.0, 15.0, 20.0, 25.4, 30.0,
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Diameter Tolerance (mm)
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+/-0.2 (General), +0.0/-0.05 (High Precision)
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Thickness Tolerance (mm)
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±0.2 (General), ±0.05 (High Precision)
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Parallelism
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3 min. (General), 3 sec. (High Precision)
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Surface Quality
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80/50 (General), 20/10 (High Precision)
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Flatness (per 25mm@633nm)
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λ(General), λ/2 (High Precision)
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Optical Density
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0.04, 0.1, 0.2, 0.3, 0.4, 0.5, 0.8, 1.0, 2.0, 3.0, 4.0, etc.
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Optical Density Tolerance
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Typical +/-5%
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Note for Optical density (D) Filter:
(1). Typical diameter is phi 10.0mm, 15.0mm, 20.0mm, 25.4mm, other size at shape of quadrate, triangular, or other multangulars are available upon request.
(2). Typical size tolerance is ±0.2mm, better precision is available upon request.
(3). Typical parallelism is 3 arc minutes, better parallelism is available upon request
(4). Typical flatness is 2λ, high precision such as λ/2 is available upon request.
(5). Typical surface quality is 80/50, better precision such as 60/40, 40/20, 20/10 is available upon request.
(6). Optical density (D) is defined as the base 10 logarithm of the reciprocal of transmittance (T):
D=log(1/T) or T=10(-D), Besides the typical optical density listed as above, others are available upon request.
(1). Typical diameter is phi 10.0mm, 15.0mm, 20.0mm, 25.4mm, other size at shape of quadrate, triangular, or other multangulars are available upon request.
(2). Typical size tolerance is ±0.2mm, better precision is available upon request.
(3). Typical parallelism is 3 arc minutes, better parallelism is available upon request
(4). Typical flatness is 2λ, high precision such as λ/2 is available upon request.
(5). Typical surface quality is 80/50, better precision such as 60/40, 40/20, 20/10 is available upon request.
(6). Optical density (D) is defined as the base 10 logarithm of the reciprocal of transmittance (T):
D=log(1/T) or T=10(-D), Besides the typical optical density listed as above, others are available upon request.