| Material | H-K9L, Schott BK7 |
|---|---|
| Design wavelength | 632.8 nm |
| Diameter | 3mm-50mm or customized |
| Diameter tolerance | +0.0/-0.1mm |
| CT tolerance | ±0.1mm |
| Focal length tolerance | ±1% |
| Surface quality | 40/20 |
| Surface Accuracy | |
| Centration | ≤3 arcmin |
| Clear Aperture | >90% |
| Bevelling | <0.2X45° |
| Coating | A： BBAR Ravg < 1% From 400nm-700nm； B： BBAR Ravg < 1% From 700nm-1100nm |
Description:
A plane concave lens has a concave side and a plane-side with a negative focal length. Usually used to collimate a beam, increase (decrease) the focal length, or enlarge (decrease) the image. In order to get less spherical aberration, when it is a collimation beam, that should be incident on the concave side of the plane concave lens.
Our plane concave lens with negative focal length is often used in imaging or beam collimation applications, which is made from K9 glass that conforms to the RoHS standard. K9 is the most commonly used material for high-quality optical elements, mostly for visible light and near-infrared applications.
| Item No. | EFL(mm) | Dia(mm) | R1(mm) | BFL(mm) | Tc(mm) | Te(mm) |
|---|---|---|---|---|---|---|
| GPA0618 | -18.00 | 6.00 | -9.27 | -19.32 | 2.00 | 2.50 |
| GPA0624 | -24.00 | 6.00 | -12.36 | -25.32 | 2.00 | 2.40 |
| GPA0927 | -27.00 | 9.00 | -13.91 | -28.32 | 2.00 | 2.70 |
| GPA1225 | -25.00 | 12.70 | -12.88 | -26.98 | 3.00 | 4.70 |
| GPA1230 | -30.00 | 12.70 | -15.45 | -31.98 | 3.00 | 4.40 |
| GPA1250 | -50.00 | 12.70 | -25.75 | -52.31 | 3.50 | 4.30 |
| GPA2550 | -50.00 | 25.40 | -25.75 | -52.31 | 3.50 | 6.90 |
| GPA2575 | -75.00 | 25.40 | -38.63 | -77.31 | 3.50 | 5.60 |
| GPA25100 | -100.00 | 25.40 | -51.51 | -102.64 | 4.00 | 5.60 |
| GPA5075 | -75.00 | 50.80 | 38.63 | -77.31 | 3.50 | 13.00 |
| GPA50100 | -100.00 | 50.80 | -51.51 | -102.64 | 4.00 | 10.70 |
| GPA50150 | -150.00 | 50.80 | -77.26 | -152.64 | 4.00 | 8.30 |
No more endless wasting time on that complex work of optical components. The goal of chineselens team is to make you sit down and relax. We do all the work, including manufacturing, trade, customs and logistics. Our service team will keep you informed of the progress of our manufacturing and trade.
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If you have optical components designed or needed to design, just send us your requirements, we will produce glass optical lenses, optical prisms, optical filters, optical windows and any other optical products for you.
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Factory: Fangxian Town, Danyang City, Jiangsu Province, China
Office: No. 12 East Yanhe Road, Yancheng City, Jiangsu Province, China
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