A double concave lens has negative focal length, thereby causing collimated incident light to diverge. Double concave lens has equal radius of curvature on both side of lens. They are generally used to expand light or increase focal length in existing system, such as beam expander and projection systems.
Description Of Double Concave Lens
The double concave lens of BRD Optical has negative focal length, thereby causing collimated incident light to diverge. Double concave lens has equal radius of curvature on both side of lens.
Specifications Of Double Concave Mirror
|
Material
|
Optical glass/ Fused silica/ sapphire etc.
|
|
Diameter
|
2mm~300mm
|
|
Diameter tolerance
|
±0.05mm(≤50mm)
|
|
±0.1mm(＞50mm)
|
|
Focal length
|
-50mm~-2000mm
|
|
Focal length tolerance
|
±0.2%（＜10mm）
|
|
±0.5%（＜10mm-1000mm）
|
|
±1%（＜＞1000mm）
|
|
Center Thickness
|
2mm~20mm
|
|
Surface quality
|
60/40， 40/20， 20/10
|
|
Surface accuracy
|
λ/2~λ/10@632.8nm，532nm
|
|
Clear Aperture
|
>85% dig diameter
|
|
Centration
|
<3arc min~ 30arc sec
|
|
Coating
|
As per customer’s request
|
|
Material
|
Diameter
(mm)
|
Surface Radius 1
(mm)
|
Surface Radius 2
(mm)
|
Center Thickness
(mm)
|
Focal Length
(mm)
|
|
H-ZK3
|
5
|
-14.4
|
-14.4
|
3
|
-9.8
|
|
H-ZF6
|
8
|
-7.2
|
-30.5
|
5
|
-7.4
|
|
H-K9L
|
10
|
-11.1
|
-11.1
|
2
|
-10.4
|
|
JGS1
|
10
|
-9.25
|
-9.25
|
1.25
|
-9.8
|
|
H-ZF7LA
|
11
|
-11.9
|
-11.9
|
2
|
-7.1
|
|
H-K9L
|
12
|
-25.1
|
-25.1
|
1.26
|
-24
|
|
BAF3
|
12
|
-19.5
|
-47.1
|
2
|
-23.4
|
|
ZF11
|
12
|
-12.6
|
-12.6
|
3
|
-7.4
|
|
H-K9L
|
12.5
|
-103
|
-103
|
1.5
|
-98.9
|
|
H-ZF6
|
13
|
-30.6
|
-154
|
3
|
-33.5
|
|
H-LAK7
|
13
|
-48.9
|
-27.7
|
2
|
-24.4
|
|
H-ZK2
|
13
|
-12.1
|
-15.7
|
1
|
-11.3
|
|
H-ZF6
|
13.5
|
-34.7
|
-79.6
|
1.5
|
-31.6
|
|
H-ZF2
|
14
|
-36.2
|
-192
|
3
|
-45
|
|
H-ZF6
|
14
|
-34.7
|
-79.6
|
3
|
-31.6
|
|
H-LAK53A
|
14
|
-31.7
|
-58.8
|
1.5
|
-27
|
|
H-K9L
|
14
|
-27.9
|
-32.2
|
2
|
-19
|
|
H-ZF6
|
15
|
-23
|
-27.7
|
2.8
|
-16.4
|
|
H-ZF6
|
15
|
-27.5
|
-23.6
|
7.23
|
-16.4
|
|
H-F3
|
15
|
-50.5
|
-11.3
|
1.5
|
-14.8
|
|
N-SF6
|
15
|
-13.2
|
-12.1
|
2
|
-7.4
|
|
H-ZF3
|
16
|
-30.6
|
-15.8
|
3
|
-14.6
|
|
H-LAF50B
|
16.7
|
-16.8
|
-17.8
|
1.8
|
-11
|
|
H-LAF50B
|
17.3
|
-37.2
|
-37.2
|
3
|
-23.9
|
|
H-K9L
|
20
|
-299
|
-85.4
|
2
|
-128
|
|
H-ZF52A
|
20
|
-51.6
|
-21
|
1.9
|
-16.7
|
|
H-ZF6
|
21
|
-77.4
|
-77.4
|
2.5
|
-51
|
|
H-ZF7LA
|
21
|
-42.6
|
-184
|
4.064
|
-42.8
|
|
H-ZF7LA
|
22
|
-255
|
-16.2
|
9
|
-18.7
|
|
H-K9L
|
24
|
-11.1
|
-90
|
1
|
-18.9
|
|
JGS1
|
25
|
-92.1
|
-92.1
|
2.5
|
-100
|
|
H-K9L
|
25
|
-52.1
|
-52.1
|
3.5
|
-50
|
|
H-LAF4
|
25
|
-38.4
|
-38.4
|
8.4
|
-25.4
|
|
H-F4
|
25
|
-36.7
|
-29.2
|
3
|
-25
|
|
ZK9
|
27
|
-149
|
-52.9
|
1.45
|
-62.7
|
|
H-ZK21
|
28.6
|
-281
|
-23.8
|
3
|
-35
|
|
BaK2
|
29.5
|
-2249
|
-80.2
|
2
|
-143
|
|
JGS1
|
30
|
-71
|
-71
|
3
|
-77
|
|
BaK2
|
30.5
|
-2249
|
-76.4
|
2
|
-137
|
|
H-ZF3
|
32
|
-11.8
|
-284
|
2
|
-15.7
|
|
ZF1
|
41
|
-692
|
-170
|
2.8
|
-211
|
|
ZF7L
|
44
|
-153
|
-49
|
3
|
-45.8
|
|
ZF4
|
54
|
-340
|
-249
|
2.5
|
-197
|
|
H-ZF3
|
58
|
-73.8
|
-234
|
4
|
-77.8
|
|
F4
|
60
|
-74.9
|
-78.4
|
1
|
-61.3
|
|
ZF1
|
65
|
-516
|
-163
|
5.49
|
-190
|
|
ZBaF3
|
65
|
-296
|
-52.4
|
2.5
|
-67.5
|
|
H-ZF2
|
68
|
-83.5
|
-249
|
5.5
|
-92.3
|
|
F13
|
68
|
-2465
|
-41.8
|
3
|
-65.6
|
|
H-F4
|
72
|
-170
|
-71.8
|
12
|
-80
|
|
H-K9L
|
90
|
-102
|
-347
|
6
|
-15
2
|
BRD Optical is one of professional optical mirror manufacturers. We provide Plano Concave Cylindrical Lens, Plano Convex Cylindrical Lens, optical component and so on. Want to know more? Please conatct us.
