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The plano concave lens has a concave surface on one side and a plano surface on the other side and with a negative focal length. It is usually used for beam collimation, increasing (decreasing) focal length, or enlarging (reducing) images. In order to obtain a smaller spherical aberration, when the incident beam is a collimated beam, the collimated beam should be incident onto the concave surface of the plano concave lens.
Plano concave lenses with negative focal length are commonly used in imaging or beam collimation applications, and coated lenses are also widely used in visible and near-infrared applications.
| Material: | BK7, Fused Silica, SF10, CaF2, Sapphire .etc. |
| Paraxial Focal Length Tolerance: | ±2% |
| Dimension Tolerance: | ±0.2(General). ±0.05(High Precision) |
| Centration: | <3 arc min |
| IRR: | λ/4@633nm（General),λ/10@633nm(High Precision) |
| Clear Aperture: | >80%(Small Size), >95%(Laege Size) |
| Surface Figure: | <1.5λ@633nm（General),<λ/4@633nm(High Precision) |
| Surface Quality: | 60/40（General),10/5(High Precision) |
| Bevel: | <0.25mm |
| Coating: | Uncaoted, AR,PR, HR, etc. |
The plano concave lens has a concave surface on one side and a plano surface on the other side and with a negative focal length. It is usually used for beam collimation, increasing (decreasing) focal length, or enlarging (reducing) images. In order to obtain a smaller spherical aberration, when the incident beam is a collimated beam, the collimated beam should be incident onto the concave surface of the plano concave lens.
Plano concave lenses with negative focal length are commonly used in imaging or beam collimation applications, and coated lenses are also widely used in visible and near-infrared applications.
| Material: | BK7, Fused Silica, SF10, CaF2, Sapphire .etc. |
| Paraxial Focal Length Tolerance: | ±2% |
| Dimension Tolerance: | ±0.2(General). ±0.05(High Precision) |
| Centration: | <3 arc min |
| IRR: | λ/4@633nm（General),λ/10@633nm(High Precision) |
| Clear Aperture: | >80%(Small Size), >95%(Laege Size) |
| Surface Figure: | <1.5λ@633nm（General),<λ/4@633nm(High Precision) |
| Surface Quality: | 60/40（General),10/5(High Precision) |
| Bevel: | <0.25mm |
| Coating: | Uncaoted, AR,PR, HR, etc. |
