Material: Bk7, Fused Silica, Germanium, Silicon, Sapphire, MgF2
Specifications
| Material |
Bk7, (other material upon request) |
| Focal Length Tolerance |
2% |
| Fringes |
1-5 |
| Irregularity of Fringes |
0.2-0.5 |
| Diameter Tolerance |
+0.10/-0.10 mm |
| Center Thickness(Tc) Tolerance |
+0.10/-0.10 mm |
| Centration |
3 arc minutes |
| Clear Aperture |
90% of diameter |
| Surface Quality: |
60-40 scratch and dig |
| Coating |
Single-layer MgF2 AR Coateds |
Product list
| Product No. |
Diameter (mm)
|
Focal Length f (mm)
|
fb
|
Center Thickness Tc (mm)
|
Edge Thickness Te (mm)
|
|
LDA601
|
6.0
|
-9.8
|
-10.4
|
2.0
|
2.9
|
|
LDA101
|
10.0
|
-15.1
|
-15.8
|
2.0
|
3.6
|
|
LDA102
|
10.0
|
-30.0
|
-30.7
|
2.0
|
2.8
|
|
LDA121
|
12.7
|
-19.0
|
-19.7
|
2.0
|
4.2
|
|
LDA122
|
12.7
|
-25.4
|
-26.0
|
2.0
|
3.6
|
|
LDA123
|
12.7
|
-38.1
|
-38.8
|
2.0
|
3.0
|
|
LDA201
|
20.0
|
-30.0
|
-30.8
|
2.7
|
6.0
|
|
LDA202
|
20.0
|
-40.0
|
-40.9
|
2.7
|
5.1
|
|
LDA203
|
20.0
|
-60.0
|
-61.2
|
2.7
|
4.3
|
|
LDA251
|
25.4
|
-50.8
|
-51.8
|
3.0
|
6.2
|
|
LDA252
|
25.4
|
-75.0
|
-76.3
|
3.0
|
5.1
|
|
LDA253
|
25.4
|
-100.0
|
-101.7
|
3.0
|
4.6
|
|
LDA254
|
25.4
|
-150.0
|
-150.9
|
3.0
|
4.1
|
|
LDA301
|
30.0
|
-60.0
|
-61.3
|
3.5
|
7.1
|
|
LDA302
|
30.0
|
-180.0
|
-181.1
|
3.5
|
4.7
|
|
LDA303
|
30.0
|
-250.0
|
-251.3
|
3.5
|
4.4
|
|
LDA381
|
38.1
|
-125.0
|
-126.5
|
4.0
|
6.8
|
|
LDA382
|
38.1
|
-200.0
|
-201.6
|
4.0
|
5.8
|
|
LDA383
|
38.1
|
-300.0
|
-301.5
|
4.0
|
5.2
|
|
LDA401
|
40.0
|
-100.0
|
-101.4
|
4.0
|
7.9
|
|
LDA402
|
40.0
|
-150.0
|
-151.4
|
4.0
|
6.6
|
|
LDA501
|
50.8
|
-250.0
|
-251.5
|
5.0
|
7.5
|
|
LDA502
|
50.8
|
-400.0
|
-401.6
|
5.0
|
6.6
|
|
LDA503
|
50.8
|
-500.0
|
-501.7
|
5.0
|
6.3
|
Note: special material and size
are available upon request.
