Audited Supplier
Doublet lens
Repair for free for any quality problem
1 year
Lighting, Medical, Optical, Photography, Astronomy
Convex Lens
90%-95%
Cemented
Optical Glass
Clear
RoHS, ISO9001, CE, TUV
Customized
Anti-Reflection
CPG
Carton, Blister, Customized
as required
China
9001909090
Product Description
Dia25.4mm 400-700nm AR Coated Optical Doublet Achromatic Lens
Descriptions:
Spherical aberration occurs because spherical surfaces are not the ideal shape with which to make a lens, but they are by far the simplest shape to which glass can be ground and polished and so are often used. Spherical aberration causes beams parallel to, but distant from, the lens axis to be focused in a slightly different place than beams close to the axis. This manifests itself as a blurring of the image. Lenses in which closer-to-ideal, non-spherical surfaces are used are called aspheric lenses. These were formerly complex to make and often extremely expensive, but advances in technology have greatly reduced the manufacturing cost for such lenses. Spherical aberration can be minimized by careful choice of the curvature of the surfaces for a particular application: for instance, a Plano-convex lens which is used to focus a collimated beam produces a sharper focal spot when used with the convex side towards the beam source.Features:
Specification:
| Items | Description | |
| Achromatic Lens | Material: | Schott N-FK5 |
| Schott F2 | ||
| Diameter: | 25.4+0.0/-0.1mm | |
| Center thickness: | 5.0+/-0.2mm | |
| Focal length: | 50.0mm+/-5%@632.8nm | |
| ROC1: | infinity | |
| ROC2=ROC3: | 74.83+/-0.1mm CX | |
| ROC4: | 74.83+/-0.1mm CX | |
| Flatness: | S1&S2&S3&S4:IRR<1/[email protected] | |
| Surface quality: | S1&S2&S3&S4:60-40 | |
| Centerness: | <3arcmin | |
| Clear Aperture: | >D9.0mm | |
| Chamfer: | <0.25mmx45deg | |
| Coating: | S1&S4:AR coating,R>98%@400-700nm,AOI=0deg | |
| Standard: | MIL-PRF-13830B | |
Descriptions:
Spherical aberration occurs because spherical surfaces are not the ideal shape with which to make a lens, but they are by far the simplest shape to which glass can be ground and polished and so are often used. Spherical aberration causes beams parallel to, but distant from, the lens axis to be focused in a slightly different place than beams close to the axis. This manifests itself as a blurring of the image. Lenses in which closer-to-ideal, non-spherical surfaces are used are called aspheric lenses. These were formerly complex to make and often extremely expensive, but advances in technology have greatly reduced the manufacturing cost for such lenses. Spherical aberration can be minimized by careful choice of the curvature of the surfaces for a particular application: for instance, a Plano-convex lens which is used to focus a collimated beam produces a sharper focal spot when used with the convex side towards the beam source.
