Achromatic Doublet Lenses
Material:
Crown Glass and Flint Glass
Surface Flatness:
N＜3, △N＜λ/4
Focal Length:
+/-1% (EFL＜1m)
+/-2% (EFL＞1m)
Diameter Tolerance:
+0.0,-0.15mm
Surface Quality:
80/50~40/20
Clear Aperture:
>90%
Coating:
AR Coating,
Single Layer MgF₂
Center Thickness:
+/-0.2mm
An achromatic lens, also referred to as an achromat, typically consists of two optical components cemented together, usually a positive low-index (crown) element and a negative high-index (flint) element. In comparison to a singlet lens, or singlet for short, which only consists of a single piece of glass, the additional design freedom provided by using a doublet design allows for further optimization of performance. Therefore, an achromatic lens will have noticeable advantages over a comparable diameter and focal length singlet.
| wdt_ID | Attributes | Value |
|---|---|---|
| 1 | Material | Crown Glass and Flint Glass |
| 17 | Diameter Tolerance | +0.0,-0.15mm |
| 18 | Center Thickness | +/-0.2mm |
| 21 | Surface Quality | 80/50~40/20 |
| 25 | Focal Length | +/-1% (EFL＜1m) +/-2% (EFL＞1m) |
| 26 | Surface Flatness | N＜3, △N＜λ/4 |
| 27 | Clear Aperture | >90% |
| 28 | Coating | AR Coating Single Layer MgF₂ |
Achromatic Doublet Lenses Common Type
wdt_ID Part No. Material dia (mm) f (mm) fb (mm) t c (mm) t e (mm)
241
ACL0610
N-BK7 + N-SF5
6
10
7.8
4.2
3
242
ACL0620
N-BK7 + N-SF5
6
20
18.6
3.1
2.5
243
ACL0630
N-BK7 + N-SF5
6
30
28.8
2.8
2.4
244
ACL1020
N-BK7 + N-SF5
10
20
17
5
3.4
245
ACL1030
N-BK7 + N-SF5
10
30
28.2
3.7
2.7
308
ACL12715
N-BAF10 + N-SF57
12.7
15
10.43
8.5
4.57
309
ACL12725
N-BAF10 + N-SF10
12.7
25
21.83
5.8
4.4
358
ACL12750
N-BK7 + N-SF5
12.7
50
48.1
4.3
3.3
359
ACL12775
N-BK7 + N-SF5
12.7
75
73.3
3.8
3.1
360
ACL2040
N-BK7 + N-SF5
20
40
35.5
8.5
5.4
361
ACL2050
N-BK7 + N-SF5
20
50
46.4
7.4
4.9
362
ACL2060
N-BK7 + N-SF5
20
60
56.8
6.7
4.6
363
ACL25430
N-BAF10 + N-SF57
25.4
30
21.94
14.8
8.42
364
ACL25440
BAFN11 + N-SF57
25.4
40
33.26
11.5
8.7
365
ACL25450
N-BAF10 + N-SF57
25.4
50
43.57
3.5
4.7
366
ACL25475
N-BK7 + N-SF5
25.4
75
70.41
9.5
6.89
367
ACL254100
N-BK7 + N-SF5
25.4
100
96.4
7.7
5.7
368
ACL254125
N-BK7 + N-SF5
25.4
125
120.96
8.4
6.85
369
ACL254150
N-BK7 + N-SF5
25.4
150
147.1
6.5
5.2
370
ACL254175
N-BK7 + N-SF5
25.4
175
170.81
9
7.89
371
ACL254200
N-BK7 + N-SF5
25.4
200
197.3
6.1
5.1
372
ACL3050
N-BK7 + N-SF5
30
50
42.3
13.5
7.7
373
ACL3075
N-BK7 + N-SF5
30
75
69.7
9.9
6.2
374
ACL3090
N-BK7 + N-SF5
30
90
85.7
8.8
5.8
375
ACL40120
N-BK7 + N-SF5
40
120
114.2
12.1
8.1
| wdt_ID | Part No. | Material | dia (mm) | f (mm) | fb (mm) | t c (mm) | t e (mm) |
|---|---|---|---|---|---|---|---|
| 241 | ACL0610 | N-BK7 + N-SF5 | 6 | 10 | 7.8 | 4.2 | 3 |
| 242 | ACL0620 | N-BK7 + N-SF5 | 6 | 20 | 18.6 | 3.1 | 2.5 |
| 243 | ACL0630 | N-BK7 + N-SF5 | 6 | 30 | 28.8 | 2.8 | 2.4 |
| 244 | ACL1020 | N-BK7 + N-SF5 | 10 | 20 | 17 | 5 | 3.4 |
| 245 | ACL1030 | N-BK7 + N-SF5 | 10 | 30 | 28.2 | 3.7 | 2.7 |
| 308 | ACL12715 | N-BAF10 + N-SF57 | 12.7 | 15 | 10.43 | 8.5 | 4.57 |
| 309 | ACL12725 | N-BAF10 + N-SF10 | 12.7 | 25 | 21.83 | 5.8 | 4.4 |
| 358 | ACL12750 | N-BK7 + N-SF5 | 12.7 | 50 | 48.1 | 4.3 | 3.3 |
| 359 | ACL12775 | N-BK7 + N-SF5 | 12.7 | 75 | 73.3 | 3.8 | 3.1 |
| 360 | ACL2040 | N-BK7 + N-SF5 | 20 | 40 | 35.5 | 8.5 | 5.4 |
| 361 | ACL2050 | N-BK7 + N-SF5 | 20 | 50 | 46.4 | 7.4 | 4.9 |
| 362 | ACL2060 | N-BK7 + N-SF5 | 20 | 60 | 56.8 | 6.7 | 4.6 |
| 363 | ACL25430 | N-BAF10 + N-SF57 | 25.4 | 30 | 21.94 | 14.8 | 8.42 |
| 364 | ACL25440 | BAFN11 + N-SF57 | 25.4 | 40 | 33.26 | 11.5 | 8.7 |
| 365 | ACL25450 | N-BAF10 + N-SF57 | 25.4 | 50 | 43.57 | 3.5 | 4.7 |
| 366 | ACL25475 | N-BK7 + N-SF5 | 25.4 | 75 | 70.41 | 9.5 | 6.89 |
| 367 | ACL254100 | N-BK7 + N-SF5 | 25.4 | 100 | 96.4 | 7.7 | 5.7 |
| 368 | ACL254125 | N-BK7 + N-SF5 | 25.4 | 125 | 120.96 | 8.4 | 6.85 |
| 369 | ACL254150 | N-BK7 + N-SF5 | 25.4 | 150 | 147.1 | 6.5 | 5.2 |
| 370 | ACL254175 | N-BK7 + N-SF5 | 25.4 | 175 | 170.81 | 9 | 7.89 |
| 371 | ACL254200 | N-BK7 + N-SF5 | 25.4 | 200 | 197.3 | 6.1 | 5.1 |
| 372 | ACL3050 | N-BK7 + N-SF5 | 30 | 50 | 42.3 | 13.5 | 7.7 |
| 373 | ACL3075 | N-BK7 + N-SF5 | 30 | 75 | 69.7 | 9.9 | 6.2 |
| 374 | ACL3090 | N-BK7 + N-SF5 | 30 | 90 | 85.7 | 8.8 | 5.8 |
| 375 | ACL40120 | N-BK7 + N-SF5 | 40 | 120 | 114.2 | 12.1 | 8.1 |
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