Double Concave Lenses are characterized by identical concave surfaces on both sides, giving them a negative focal length. These lenses inherently diverge incoming light rays. In 1:1 imaging, they ensure faithful image reproduction without distortion. Within multielement systems, they partner with other lenses to rectify aberrations and fine - tune focal lengths, optimizing overall optical performance. Their light - diverging property makes them essential in optical setups demanding precise light - path control, enhancing functionality in diverse applications.
Item No :
Double Concave LensProduct Origin :
FuZhouSpecifications:
Material: | N-BK7, Fused Silica, N-SF10, Silicon, Ge,CaF2, etc. |
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: | 60/40 |
Protected Bevel: | <0.25mmx45deg |
Coating: | uncoated, AR, HR, PR Coating, etc. |
N-BK7 Double Concave Lens
Design wavelength: 546.1nm Design Index:1.5183 ± 0.0005
Part No.
|
f (mm)
|
dia (mm)
|
R1=R2 (mm)
|
t c (mm)
|
t e (mm)
|
Fb (mm)
|
DCV1201
|
-25.0
|
12.7
|
26.25
|
2.0
|
3.6
|
-25.7
|
DCV1202
|
-30.0
|
12.7
|
31.44
|
2.0
|
3.3
|
-30.7
|
DCV1203
|
-40.0
|
12.7
|
41.80
|
2.0
|
3.0
|
-40.7
|
DCV1204
|
-50.0
|
12.7
|
52.17
|
2.0
|
2.8
|
-50.7
|
DCV1301
|
-25.0
|
25.0
|
26.25
|
2.0
|
8.6
|
-25.7
|
DCV1302
|
-35.0
|
25.4
|
36.62
|
2.0
|
6.5
|
-35.7
|
DCV1303
|
-50.0
|
25.4
|
52.17
|
2.0
|
5.1
|
-50.7
|
DCV1305
|
-75.0
|
25.4
|
78.09
|
2.0
|
4.1
|
-75.7
|
DCV1306
|
-100.0
|
25.4
|
104.00
|
2.0
|
3.6
|
-100.7
|
Fused silica Double Concave Lens
Design wavelength: 546.1nm Design Index:1.46008
Part No.
|
F (mm)
|
f(mm)
|
R1=R2(mm)
|
Tc
|
Te
|
Fb
|
BCV2001
|
6.0
|
15.0
|
14.03
|
1.5
|
2.15
|
15.50
|
BCV2002
|
6.0
|
30.0
|
27.84
|
1.5
|
1.82
|
30.51
|
BCV2101
|
12.7
|
15.0
|
14.11
|
2.0
|
5.02
|
15.67
|
BCV2102
|
12.7
|
20.0
|
18.71
|
2.0
|
4.22
|
20.67
|
BCV2103
|
12.7
|
25.0
|
23.32
|
2.0
|
3.76
|
25.68
|
BCV2104
|
12.7
|
30.0
|
27.92
|
2.0
|
3.46
|
30.68
|
BCV2105
|
12.7
|
40.0
|
37.12
|
2.0
|
3.09
|
40.68
|
BCV2201
|
25.4
|
25.0
|
23.32
|
2.0
|
9.52
|
25.68
|
BCV2202
|
35.4
|
35.0
|
32.52
|
2.0
|
7.17
|
35.68
|
BCV2203
|
25.4
|
50.0
|
46.32
|
2.0
|
5.55
|
50.68
|
BCV2204
|
25.4
|
75.0
|
69.33
|
2.0
|
4.35
|
75.69
|
BCV2205
|
25.4
|
100.0
|
92.33
|
2.0
|
3.76
|
100.68
|
BCV2206
|
25.4
|
150.0
|
138.34
|
2.0
|
3.17
|
150.68
|
BCV2207
|
25.4
|
200.0
|
184.35
|
2.0
|
2.88
|
200.69
|
BCV2208
|
25.4
|
250.0
|
230.36
|
2.0
|
2.70
|
250.69
|
BCV2209
|
25.4
|
300.0
|
276.36
|
2.0
|
2.58
|
300.68
|
BCV2210
|
25.4
|
500.0
|
460.40
|
2.0
|
2.35
|
500.69
|
BCV2211
|
25.4
|
1000.0
|
920.48
|
2.0
|
2.18
|
1000.69
|
BCV2301
|
38.0
|
50.0
|
46.48
|
3.0
|
11.12
|
51.02
|
BCV2302
|
38.0
|
100.0
|
92.49
|
3.0
|
6.95
|
101.03
|
BCV2303
|
38.0
|
150.0
|
138.50
|
3.0
|
5.62
|
151.03
|
BCV2304
|
38.0
|
200.0
|
184.50
|
3.0
|
4.96
|
201.02
|
BCV2305
|
38.0
|
350.0
|
322.53
|
3.0
|
4.13
|
351.03
|
BCV2306
|
38.0
|
500.0
|
460.55
|
3.0
|
3.78
|
501.02
|
BCV2307
|
38.0
|
750.0
|
690.59
|
3.0
|
3.52
|
751.02
|
BCV2308
|
38.0
|
1000.0
|
920.64
|
3.0
|
3.39
|
1001.04
|
What is the use of a double concave lens?
In high precision optical imaging systems, double concave lenses collaborate with other optical elements to correct aberrations (such as spherical aberration), ensuring clear and undistorted imaging. In laser beam shaping systems, they are used to expand and diverge laser beams, adjusting the beam’s divergence angle to meet application requirements, such as uniform illumination in material processing. In optical communication systems, they assist in optimizing light signal coupling, regulating the light path to improve the efficiency of optical signal transmission and reception. Their divergence characteristic makes them indispensable in advanced optical setups requiring precise control over light propagation and distribution.