Plano concave lens, K9
| Material | K9 |
|---|---|
| Design wavelength | 587.6 nm |
| Diameter | 3mm-50mm or customized |
| Diameter tolerance | +0.0/-0.1mm |
| CT tolerance | ±0.2mm |
| Focal length tolerance | ±2% |
| Surface quality | 40/20 |
| Surface flatness（@633 nm） | λ/2 |
| Centration | ≤3 arcmin |
| Coating | UV, VIS, NIR, SWIR |
Description:
- Material: K9
- Working wavelength: 350 nm-2 μm
- Usage: Imaging, beam expanding or beam contracting
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.
K9 Plano concave lens, size (mm)
| Item No. | Material | φ | R | f' | Tc |
|---|---|---|---|---|---|
| CHL006098 | K9 | 6.0 | 5.069 | -9.8 | 1.0 |
| CHL010015 | K9 | 10.0 | 7.767 | -15.0 | 1.5 |
| CHL010020 | K9 | 10.0 | 10.339 | -20.0 | 1.5 |
| CHL010030 | K9 | 10.0 | 15.504 | -30.0 | 1.5 |
| CHL127019 | K9 | 12.7 | 9.841 | -19.0 | 2.0 |
| CHL127254 | K9 | 12.7 | 13.130 | -25.4 | 2.0 |
| CHL127381 | K9 | 12.7 | 19.690 | -38.1 | 2.0 |
| CHL020030 | K9 | 20.0 | 15.507 | -30.0 | 2.5 |
| CHL020050 | K9 | 20.0 | 25.842 | -50.0 | 2.5 |
| CHL020060 | K9 | 20.0 | 31.009 | -60.0 | 2.5 |
| CHL020080 | K9 | 20.0 | 41.344 | -80.0 | 2.5 |
| CHL254030 | K9 | 25.4 | 15.500 | -30.0 | 3.0 |
| CHL254040 | K9 | 25.4 | 20.670 | -40.0 | 3.0 |
| CHL254508 | K9 | 25.4 | 26.261 | -50.8 | 3.0 |
| CHL254075 | K9 | 25.4 | 38.761 | -75.0 | 3.0 |
| CHL254100 | K9 | 25.4 | 51.680 | -100.0 | 3.0 |
| CHL254150 | K9 | 25.4 | 77.520 | -150.0 | 3.0 |
| CHL254200 | K9 | 25.4 | 103.360 | -200.0 | 3.0 |
| CHL030060 | K9 | 30.0 | 31.109 | -60.0 | 3.0 |
| CHL030120 | K9 | 30.0 | 62.016 | -120.0 | 3.0 |
| CHL030150 | K9 | 30.0 | 77.520 | -150.0 | 3.0 |
| CHL040100 | K9 | 40.0 | 51.684 | -100.0 | 3.5 |
| CHL040200 | K9 | 40.0 | 103.359 | -200.0 | 3.5 |
| CHL040400 | K9 | 40.0 | 206.719 | -400.0 | 3.5 |
| CHL508250 | K9 | 50.8 | 129.199 | -250.0 | 4.0 |
| CHL508400 | K9 | 50.8 | 206.719 | -400.0 | 4.0 |
| CHL508500 | K9 | 50.8 | 258.398 | -500.0 | 4.0 |
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