| 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:
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. | 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 |
...
Factory: Fangxian Town, Danyang City, Jiangsu Province, China
Office: No. 12 East Yanhe Road, Yancheng City, Jiangsu Province, China
Tel: +86-515-69939697
Mob: +86-18005107299
Chineselens has a very strong support team and we will usually reply to you within a working day.
Please make sure that the email information you filled in is correct, otherwise, we will not be able to contact you and give you an offer.
Chineselens Is A Website Focused On Providing Information About Precision Glass And Optical Components.
We will contact you within one working day, please pay attention to the replied email: [email protected]