Colored Glass Filters

COLORED GLASS FILTERS

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 ItemStandardHi Precision
Standard Size50mm X 50mm50mm X 50mm
Clear Apparture90%90%
Standard Thickness (*)2.5 mm2.5 mm
Surface RoughnessP2 (Rq < 4nm)P3 (Rq < 2nm)
Flatness3/5(1); λ=632.8nm3/3(1); λ=632.8nm
Wavefront Distortion13/3(0.5); λ=632.8nm13/1(0.5); λ=632.8nm
ParallelismWithin 2 minutesWithin 1 minute
Bubbles, Inclusions1/6 X 0.161/3 X 0.063
Pits, Sleeks, Scuffs,
Scratches, Bubbles and
Inclusions on surface
5/8 X 0.1
L3 X 0.016
(Total length of scratches should not exceed half of the clear aperture dimension which is defined as a circle of 90% in the center of the surface area)
5/3 X 0.063
L3 X 0.006
(Total length of scratches should not exceed half of the clear aperture dimension which is defined as a circle of 90% in the center of the surface area)
StriaeWithin specification of transmitted wavefrontWithin specification of transmitted wavefront
Chip Standard
Chamfer 0.3
Allowed within chamfer E0.25Allowed within chamfer E0.25

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