Periscope is main used in bulk.it's the main system to observe and conceal the object above the sea.
Specifications
|
Material
|
BK7 and Fused silica typically, Visible optical glass, Infrared optical glass.
|
Tolerances
|
Low precision
|
Standard Precision
|
High precision
|
|
Glass Quality
|
nd
|
±0.001
|
±0.0005
|
Melt controlled
|
|
vd
|
±0.8%
|
±0.3%
|
Melt controlled
|
|
Dimension Tolerance (mm)
|
±0.20
|
±0.10
|
+0.01/-0.01
|
|
Angle Tolerance (θⅠ)
|
10 minutes
|
3-5 minutes
|
5 second
|
|
Angle Tolerance (θⅡ)
|
10 minutes
|
3-5 minutes
|
10 second
|
|
Scratch-Dig
|
80-50
|
60-40
|
10-5
|
|
Wave front Distortion @632.8nm
|
λ per 25mm
|
λ/4per 25mm
|
λ/20 per 25mm
|
|
Clear Aperture
|
80%
|
90%
|
100%
|
|
Bevel
|
0.2±0.10mmx45°or upon requirement
|
No bevel
|
|
Coating
|
Coating may be available by custom order
|
