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Product classification
GCL-010420 BK7 Bi-Concave Lenses
GCL-0104 BK7 Bi-Concave Lenses
Similar to plano- concave lenses, a bi-concave lens diverges parallel input rays and has a negative focal length. It has a virtual focus at the object side of the lens. Bi-concave lenses are usually suitable for absolute conjugate ratios closer to 1:1.
• Material: BK7 grade A, fine annealed
• Focal Length (f'): ±2% at 587.6nm
• Diameter(φ) Tolerance: +0.0/-0.20
• Center Thickness(Tc): ±0.1
• Centration: 3′
• Form Error: 1~5 fringes
• Irregularity of Fringes: 0.2~0.5 fringes
• Surface Quality: 60-40 scratch-dig
• Coating: 1/4 wave MgF2 coating at 550nm for 0° angle of incidence
• Clear Aperture: 90% diameter
GCL-0104 BK7 Bi-Concave Lenses
|
Part No |
Ø |
f' |
fb |
Tc |
Te |
Weight(g) |
|
6.0 |
-9.8 |
-10.4 |
2.0 |
2.9 |
1 |
|
|
10.0 |
-15.1 |
-15.8 |
2.0 |
3.6 |
1 |
|
|
10.0 |
-30.0 |
-30.7 |
2.0 |
2.8 |
1 |
|
|
12.7 |
-19.0 |
-19.7 |
2.0 |
4.2 |
1 |
|
|
12.7 |
-25.4 |
-26.0 |
2.0 |
3.6 |
1 |
|
|
12.7 |
-38.1 |
-38.8 |
2.0 |
3.0 |
1 |
|
|
20.0 |
-30.0 |
-30.8 |
2.7 |
6.0 |
3 |
|
|
20.0 |
-40.0 |
-40.9 |
2.7 |
5.1 |
3 |
|
|
20.0 |
-60.0 |
-61.2 |
2.7 |
4.3 |
3 |
|
|
25.4 |
-50.8 |
-51.8 |
3.0 |
6.2 |
6 |
|
|
25.4 |
-75.0 |
-76.3 |
3.0 |
5.1 |
6 |
|
|
25.4 |
-100.0 |
-101.7 |
3.0 |
4.6 |
6 |
|
|
25.4 |
-150.0 |
-150.9 |
3.0 |
4.1 |
6 |
|
|
30.0 |
-60.0 |
-61.3 |
3.5 |
7.1 |
7 |
|
|
30.0 |
-180.0 |
-181.1 |
3.5 |
4.7 |
7 |
|
|
30.0 |
-250.0 |
-251.3 |
3.5 |
4.4 |
7 |
|
|
40.0 |
-100.0 |
-101.4 |
4.0 |
7.9 |
19 |
|
|
40.0 |
-150.0 |
-151.4 |
4.0 |
6.6 |
18 |
|
|
50.8 |
-250.0 |
-251.5 |
5.0 |
7.5 |
29 |
|
|
50.8 |
-400.0 |
-401.6 |
5.0 |
6.6 |
29 |
|
|
50.8 |
-500.0 |
-501.7 |
5.0 |
6.3 |
29 |
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