HOYA Standard Specification |
Standard specification of the filters we manufacture is as follows.
We also comply with the requirement from the customers. Please ask more details to our sales representatives. |
| Quality Item | Standard | Hi precision |
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| Standard Size | 50mm X 50mm | 50mm X 50mm |
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| Clear Apparture | 90% | 90% |
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| Standard Thickness (*) | 2.5 mm | 2.5 mm |
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| Surface Roughness | P2 ( Rq < 4nm ) | P3 ( Rq < 2nm ) |
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| Flatness | 3/5(1); λ=632.8nm | 3/3(1); λ=632.8nm |
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| Wavefront Distortion | 13/3(0.5); λ=632.8nm | 13/1(0.5); λ=632.8nm |
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| Parallelism | Within 2 minutes | Within 1 minute |
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| Bubbles, Inclusions | 1/6 X 0.16 | 1/3 X 0.063 |
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Pits, Sleeks, Scuffs,
Scratches, Bubbles
and Inclusions on surface | 5/8 X 0.1
L3 X 0.016
( Total length should not exceed
more than half of size of glass incircle ) | 5/3 X 0.063
L3 X 0.006
( Total length should not exceed
more than half of size of glass incircle ) |
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| Striae | Within specification of transmitted wavefront | Within specification of transmitted wavefront |
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Chip
Standard Chamfer 0.3 | Allowed within chamfer E0.25 | Allowed within chamfer E0.25 |
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| The above standard comply with ISO10110 series |
| (*) | Exclude thickness of LA/LB/ND filters
C filters follows HOYA color filter catalog
Standard thickness defines to meet optical characteristics according to HOYA filter catalog |
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