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  • 氟化钙平凹透镜
 
氟化钙平凹透镜

 

CaF2 Plano concave Lenses are made from CaF2 material. They present a concave surface and a plano surface. They have a negative focal length and are used for image reductinon or to spread light. These lenses diverge collimated incident light and form virtual images which are seen through the lens. They are often used to expand light or to increase focal lengths in existing systems.
Specifications:
Material:-----------------------------------------------------------CaF2
Design Wavelength:----------------------------------------------1500nm,n=1.425
Diameter Tolerance:----------------------------------------------+0.0/-0.15mm
Focal Length Tolerance (mm):----------------------------------+/-2%
Centration:---------------------------------------------------------<3 arc minutes
Clear Aperture:---------------------------------------------------->85%
Surface Figure:-----------------------------------------------------<λ/4@633nm
Surface Quality:-----------------------------------------------------80/50
Protected Bevel:---------------------------------------------------<0.25mmx45deg
Coating:--------------------------------------------------------------uncoated

Part No.
F(mm)
f(mm)
R(mm)
Tc(mm)
Te(mm)
Fb(mm)
PCV4-201
25.4
-50.0
21.31
2.0
6.2
-51.4
PCV4-202
25.4
-75.0
31.96
2.0
4.6
-76.4
PCV4-203
25.4
-100.0
42.63
2.0
3.9
-101.4
PCV4-204
25.4
-150.0
63.94
2.0
3.3
-151.4
PCV4-205
25.4
-200.0
85.25
2.0
2.95
-201.4
PCV4-206
25.4
-250.0
106.56
2.0
2.75
-251.4
PCV4-207
25.4
-300.0
127.88
2.0
2.6
-301.4
PCV4-208
25.4
-500.0
213.13
2.0
2.4
-501.4

 

CaF2 Plano Concave Lens


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