双凹透镜

 

The Double Concave Lenses present an identical concave surface on both sides of the lens.They have a negative focal length and are useful for 1:1 imaging and in multielement systems.

Specifications:
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 (per 25mm@632.8nm)----<1.5λ
IRR ( @632.8nm)--------------------------------<λ/4
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)
Illustration
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
Illustrationc
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

 

Note: Other sizes, material are available upon request.
The ones with Silicon, Ge,CaF2 material pls kindly refer to IR OPTICS section.


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