平凹透镜
Plano-concave lens has a negative focal length, diverges collimated incident light, and forms only virtual images which are seen through the lens. It is often used to expand light beams or increase focal lengths in existing systems.
Specifications
Material: ........................................BK7, Silica, CaF2, etc.
Diameter Tolerance: .....................................+0.0, -0.1 mm
tc tolerance: ......................................................±0.1 mm
Clear Aperture: ........................................................>85%
Surface Quality: .......................................................40-20
Flatness: .....................................................N=2, △N=0.5
Centration: ....................................................±3 arc mins
Size (φ): ............................................3 to 200mm or larger
|
Part No.
|
F(mm)
|
Dia(mm)
|
Rad(mm)
|
Tc(mm)
|
Te(mm)
|
fb(mm)
|
|
PCCL 101
|
-10.0
|
6.0
|
5.18
|
2.0
|
2.9
|
-11.3
|
|
PCCL 102
|
-20.0
|
10.0
|
10.37
|
2.0
|
3.2
|
-21.3
|
|
PCCL 103
|
-50.0
|
12.7
|
25.92
|
2.0
|
2.5
|
-51.3
|
|
PCCL 104
|
-100.0
|
25.4
|
51.83
|
2.0
|
3.6
|
-101.3
|
