issue date：2016-3-31 15:35:44 visit frequency：2952
Double Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double Concave Lenses which have two concave surfaces are Optical Lenses with negative focal lengths. We provide a large variety kinds of specifications according to clients’ request or Personalized customization for precision grade Double Concave lenses with tighter tolerances . Our Double Concave lenses are available in a range of coating or substrate options. Anti-reflection coatings range from the Ultraviolet (UV) to the Infrared (IR).
|
Material |
Optical Glass |
|
|
Focal Length(F) |
+/-2mm------+/-3000mm |
|
|
Diameter(φ) |
φ2mm------φ300mm |
|
|
Radius(R) |
2mm------1500mm |
|
|
Central Thickness(Tc) |
0.5mm------50mm |
|
|
Edge Thickness(Te) |
0.5mm-----50mm |
|
|
Flatness |
N=0.5,1,2,3 △N=0.2,0.5,1 |
|
|
Surface Quality |
10-5,20-10,40-20,60-40,80-50,120-80 |
|
|
Centration |
30'',1’,2’,3’,5’ |
|
|
Coating |
Uncoated, R, R, R Coating, etc |
The followings are available in stocks or customize per request specification:
|
Part No. |
f (mm) |
F (mm) |
R1=R2 (mm) |
t c (mm) |
t e (mm) |
f b (mm) |
|
LDCV101 |
-25.0 |
12.7 |
26.25 |
2.0 |
3.6 |
-25.7 |
|
LDCV102 |
-30.0 |
12.7 |
31.44 |
2.0 |
3.3 |
-30.7 |
|
LDCV103 |
-40.0 |
12.7 |
41.80 |
2.0 |
3.0 |
-40.7 |
|
LDCV104 |
-50.0 |
12.7 |
52.17 |
2.0 |
2.8 |
-50.7 |
|
LDCV105 |
-25.0 |
25.0 |
26.25 |
2.0 |
8.6 |
-25.7 |
|
LDCV106 |
-35.0 |
25.4 |
36.62 |
2.0 |
6.5 |
-35.7 |
|
LDCV107 |
-50.0 |
25.4 |
52.17 |
2.0 |
5.1 |
-50.7 |
|
LDCV108 |
-75.0 |
25.4 |
78.09 |
2.0 |
4.1 |
-75.7 |
|
LDCV109 |
-100.0 |
25.4 |
104.00 |
2.0 |
3.6 |
-100.7 |
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