双凹透镜
Double-concave lenses are normally used in combination with other lenses. Typical applications include laser beam expanders, optical character readers, viewers, and projection systems.
Specifications
Material: .............................BK7, Silica, CaF2, Silicon, etc.
Diameter Tolerance: .....................................+0.0, -0.1 mm
tc tolerance: .......................................................±0.1mm
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)
|
Rad1=Rad2(mm)
|
Tc(mm)
|
Te(mm)
|
fb(mm)
|
DCCL 101
|
-10.0
|
10.0
|
10.7
|
2.0
|
4.5
|
-10.6
|
DCCL 102
|
-20.0
|
12.7
|
21.07
|
2.0
|
4.0
|
-20.6
|
DCCL 103
|
-50.0
|
12.7
|
52.17
|
2.0
|
2.8
|
-50.7
|
DCCL 104
|
-100.0
|
25.4
|
104.0
|
2.0
|
3.6
|
-100.7
|
Note: Other sizes and specifications are available upon request.
|