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The
Double Concave Lenses are made from BK7 material, which are manufactured with
both surfaces concave. These lenses have negative focal lengths. These lenses
diverge collimated incident light and form virtual images, which are seen
through the lens. They are often used to expand light or increase focal lengths
in existing systems. They are used in laser beam expanders, optical character
readers, viewers, and projection systems. We will provide precision grade
Double Concave Lenses with tighter manufacturing tolerances.
Material: |
Fused
Silica or BK7 |
Design
Wavelength: |
546.1nm,
n=1.46008 |
Diameter
Tolerance: |
+0.0/ |
Paraxial
Focal Length: |
±2% |
Centration: |
3
arcmin |
Surface
Figure : |
/4 @
632.8 nm |
Surface
Quality: |
20/10 |
Clear
Aperture: |
>80% |
Bevel: |
< |
Coating: |
AR
coating or HR coating |
Item# |
Dia(mm) |
f(mm) |
R2=R2(mm)
|
Tc |
Te |
Fb |
BCV1-001 |
6.0 |
15.0 |
15.20 |
2.10 |
1.5 |
14.30 |
BCX1-002 |
6.0 |
30.0 |
30.83 |
1.79 |
1.5 |
29.42 |
BCV1-101 |
12.7 |
15.0 |
14.65 |
4.89 |
2.0 |
13.27 |
BCV1-102 |
12.7 |
20.0 |
20.04 |
4.07 |
2.0 |
18.62 |
BCV1-103 |
12.7 |
25.0 |
25.35 |
3.62 |
2.0 |
23.82 |
BCV1-104 |
12.7 |
30.0 |
30.55 |
3.33 |
2.0 |
28.89 |
BCV1-105 |
12.7 |
40.0 |
41.02 |
2.99 |
2.0 |
39.04 |
BCV1-106 |
12.7 |
50.0 |
51.40 |
2.79 |
2.0 |
49.08 |
BCV1-107 |
12.7 |
75.0 |
77.45 |
2.52 |
2.0 |
74.24 |
BCV1-108 |
12.7 |
100.0 |
103.28 |
2.39 |
2.0 |
99.16 |
BCV1-201 |
25.4 |
25.0 |
24.72 |
9.02 |
2.0 |
22.24 |
BCV1-202 |
25.4 |
31.7 |
31.55 |
7.34 |
2.0 |
29.15 |
BCV1-203 |
25.4 |
35.0 |
35.08 |
6.76 |
2.0 |
32.66 |
BCV1-204 |
25.4 |
50.0 |
50.93 |
5.22 |
2.0 |
48.22 |
BCV1-205 |
25.4 |
75.0 |
77.09 |
4.11 |
2.0 |
73.63 |
BCV1-206 |
25.4 |
100.0 |
103.04 |
3.57 |
2.0 |
98.73 |
BCV1-207 |
25.4 |
125.0 |
129.12 |
3.25 |
2.0 |
123.92 |
BCV1-208 |
25.4 |
150.0 |
155.10 |
3.04 |
2.0 |
149.00 |
BCV1-209 |
25.4 |
175.0 |
181.13 |
2.89 |
2.0 |
174.12 |
BCV1-210 |
25.4 |
200.0 |
207.00 |
2.78 |
2.0 |
199.07 |
BCV1-211 |
25.4 |
250.0 |
258.90 |
2.62 |
2.0 |
249.12 |
BCV1-212 |
25.4 |
300.0 |
310.80 |
2.52 |
2.0 |
299.17 |
BCV1-213 |
25.4 |
500.0 |
518.30 |
2.31 |
2.0 |
499.21 |
BCV1-214 |
25.4 |
1000.0 |
1037.10
|
2.16 |
2.0 |
999.32 |
BCV1-301 |
38.0 |
45.0 |
44.87 |
10.44 |
2.0 |
41.46 |
BCV1-302 |
38.0 |
50.0 |
49.97 |
10.50 |
3.0 |
46.40 |
BCV1-303 |
38.0 |
100.0 |
102.57 |
6.55 |
3.0 |
97.78 |
BCV1-304 |
38.0 |
150.0 |
154.70 |
5.34 |
3.0 |
148.23 |
BCV1-305 |
38.0 |
200.0 |
206.70 |
4.75 |
3.0 |
198.46 |
BCV1-306 |
38.0 |
350.0 |
362.40 |
4.00 |
3.0 |
348.66 |
BCV1-307 |
38.0 |
500.0 |
518.10 |
3.70 |
3.0 |
498.79 |
BCV1-308 |
38.0 |
700.0 |
725.60 |
3.50 |
3.0 |
698.84 |
BCV1-309 |
40.0 |
63.5 |
64.42 |
8.27 |
1.9 |
60.70 |
BCV1-501 |
50.0 |
100.0 |
102.06 |
9.20 |
3.0 |
96.90 |
BCV1-502 |
50.0 |
150.0 |
154.27 |
7.10 |
3.0 |
147.60 |
BCV1-503 |
50.0 |
200.0 |
206.28 |
6.00 |
3.0 |
198.00 |
BCV1-504 |
50.0 |
250.0 |
258.22 |
5.40 |
3.0 |
248.20 |
BCV1-505 |
50.0 |
400.0 |
413.87 |
4.50 |
3.0 |
398.50 |
BCV1-506 |
50.0 |
450.0 |
465.73 |
4.30 |
3.0 |
448.60 |
BCV1-507 |
50.0 |
500.0 |
517.58 |
4.20 |
3.0 |
448.60 |
BCV1-508 |
50.0 |
600.0 |
621.28 |
4.00 |
3.0 |
598.70 |
BCV1-509 |
50.0 |
800.0 |
828.64 |
3.8 |
3.0 |
798.70 |