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Double Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths. HG OPTRONICS offers Double Concave lenses with a variety of coating options.
Product Origin:
ChinaShipping Port:
Fuzhou, ChinaLead Time:
5-6weeks
4.1.What is Biconcave lens?
Double Concave lenses(biconcave lens) are manufactured with two concave surfaces to provide a negative focal length. The lens is also called a negative or diverging lens.
4.2.What is biconcave lens used for?
These lenses are normally used in applications that require to expand light beams or to increase focal lengths. Such as Beam Expanders, Projection lenses, viewers, Medical Ophthalmic Detection... and so on.
4.3. What can HG OPTRONICS do?
HG OPTRONICS as a developing and responsible optical component & assembly manufacturers from China, produces high quality Biconvex lenses out of many variations of optical glass, fused silica, crystal and Infrared materials, and with the aid of the cutting-edge thin film technology.
Coatings such as Broadband AR or V-AR can be applied to these spherical lenses to provide added performance.
4.4. Double Concave lens Common Specification
|
Material |
Optical glass, BK7,H-K9L, Fused Silica, CDGM,Schott, OHARA, YAG CaF2,Germanium etc. |
|
Dimension Tolerance |
±0.1mm(Standard), ±0.01mm(High Precision) |
|
Center Thickness Tolerance |
±0.1mm(Standard), ±0.02mm(High Precision) |
|
Design wavelength |
546.1nm |
|
Focal tolerance |
±1% |
|
Surface quality |
40/20(Standard), 10/5(High Precision) |
|
Clear Aperture |
>90% |
|
Surface flatness |
N=3 △N=0.5 |
|
Centration |
3 arc minutes |
|
Bevel |
<0.2mm×45° |
|
Coating Optional: |
Single layer MgF2, Multiple layers BBAR coating Designed for 0° Angle of Incidence |
4.5. Double Concave Lense case show
|
Part No |
Material |
F(mm) |
Φ(mm) |
R1=R2(mm) |
Tc(mm) |
Te(mm) |
Fb(mm) |
|
HGQ22250 |
BK7 |
-10.0 |
10.0 |
10.7 |
2.0 |
4.5 |
-10.6 |
|
HGQ22251 |
BK7 |
-15.0 |
12.7 |
15.88 |
2.0 |
4.6 |
-15.6 |
|
HGQ22259 |
BK7 |
-25.0 |
12.7 |
26.25 |
2.0 |
3.6 |
-25.7 |
|
HGQ22260 |
BK7 |
-30.0 |
12.7 |
31.44 |
2.0 |
3.3 |
-30.7 |
|
HGQ22278 |
BK7 |
-40.0 |
12.7 |
41.8 |
2.0 |
3.0 |
-40.7 |
|
HGQ22280 |
BK7 |
-50.0 |
12.7 |
52.17 |
2.0 |
2.8 |
-50.7 |
|
HGQ22311 |
BK7 |
-35.0 |
25.4 |
36.62 |
2.0 |
6.5 |
-35.7 |
|
HGQ22324 |
BK7 |
-75.0 |
25.4 |
78.09 |
2.0 |
4.1 |
-75.7 |
|
HGQ22328 |
BK7 |
-100.0 |
25.4 |
104 |
2.0 |
3.6 |
-100.7 |
|
HGQ22330 |
BK7 |
-150.0 |
25.4 |
155.830 |
2.0 |
3.0 |
-150.70 |
|
HGQ22335 |
BK7 |
-200.0 |
25.4 |
207.660 |
2.0 |
2.8 |
-200.70 |
|
HGQ22336 |
BK7 |
-250.0 |
25.4 |
259.490 |
2.0 |
2.6 |
-250.70 |
|
HGQ22344 |
BK7 |
-300.0 |
25.4 |
311.320 |
2.0 |
2.5 |
-300.70 |
|
HGQ22346 |
BK7 |
-500.0 |
38.0 |
518.810 |
3.0 |
3.7 |
-501.00 |
|
HGQ22348 |
BK7 |
-100.0 |
50.0 |
104.170 |
3.0 |
9.1 |
-101.00 |
|
HGQ22350 |
BK7 |
-150.0 |
50.0 |
156.000 |
3.0 |
7.0 |
-151.00 |
|
HGQ22356 |
BK7 |
-200.0 |
50.0 |
207.830 |
3.0 |
6.0 |
-201.00 |
|
HGQ22360 |
BK7 |
-250.0 |
50.0 |
259.660 |
3.0 |
5.4 |
-251.00 |
|
HGQ22372 |
BK7 |
-400.0 |
50.0 |
415.150 |
3.0 |
4.5 |
-401.00 |
|
HGQ22382 |
BK7 |
-500.0 |
50.0 |
518.820 |
3.0 |
4.2 |
-501.00 |
|
HGQ22396 |
JGS1 |
-15.0 |
12.7 |
14.110 |
2.0 |
5.0 |
-15.70 |
|
HGQ22423 |
JGS1 |
-20.0 |
12.7 |
18.710 |
2.0 |
4.2 |
-20.70 |
|
HGQ22426 |
JGS1 |
-30.0 |
12.7 |
27.920 |
2.0 |
3.5 |
-30.70 |
|
HGQ22429 |
JGS1 |
-25.0 |
25.4 |
23.320 |
2.0 |
9.5 |
-25.70 |
|
HGQ22433 |
JGS1 |
-50.0 |
25.4 |
46.320 |
2.0 |
5.6 |
-50.70 |
|
HGQ22435 |
JGS1 |
-100.0 |
25.4 |
92.330 |
2.0 |
3.8 |
-100.70 |
|
HGQ22461 |
JGS1 |
-50.0 |
38.0 |
46.480 |
3.0 |
11.1 |
-51.00 |
|
HGQ22463 |
JGS1 |
-100.0 |
38.0 |
92.490 |
3.0 |
6.9 |
-101.00 |
|
HGQ22466 |
JGS1 |
-150.0 |
38.0 |
138.500 |
3.0 |
5.6 |
-151.00 |
|
HGQ22468 |
JGS1 |
-200.0 |
38.0 |
184.500 |
3.0 |
5.0 |
-201.00 |
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