40-20 Scratch / Dig Meniscus Lenses
from HG Optronics, Inc.
The Positive Meniscus Lenses are a convex-concave lens, but it is thicker at the center than at the edges. They are felt polished and are used universally in the ophthalmic industry where convention dictates that lens power be specified in Diopters. The Negative Meniscus Lenses are a convex-concave... [See More]
- Surface Quality: 10-5 Scratch / Dig; 40-20 Scratch / Dig; 40/20(Standard), 10/5(High Precision)
- Center Thickness: 3 to 4
- Lens Application: Infrared
- Edge Thickness: 2.5 to 4.5
from CASTECH, Inc.
Other sizes and focal length are available upon request. Also the lens ring mounts are available upon request. [See More]
- Surface Quality: 40-20 Scratch / Dig
- Materials: BK7 Glass
- Diameter / Length: 25.4
- Surface Flatness: λ/4
from CASTECH, Inc.
Other sizes and focal length are available upon request. Also the lens ring mounts are available upon request. [See More]
- Surface Quality: 40-20 Scratch / Dig
- Materials: BK7 Glass
- Diameter / Length: 25.4
- Surface Flatness: λ/4
from EKSMA OPTICS
Zinc selenide (ZnSe) is the most popular material for infrared applications. Due to a very wide transmission range covering 0.6-22 µm chemical vapor deposition grown ZnSe as a high optical quality material is used to manufacture optical components (windows, mirrors, lenses) for high power IR... [See More]
- Surface Quality: 40-20 Scratch / Dig
- Diameter / Length: 12.7 to 76.2
- Focal Length: 25.4 to 254
from ECOPTIK (CHANGCHUN) LTD
Meniscus Cylindrical Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another lens while maintaining the angular resolution of the optical assembly. This lens shape is best used... [See More]
- Surface Quality: 20-10 Scratch / Dig; 40-20 Scratch / Dig; 60-40 Scratch / Dig
- Center Thickness: 2 to 20
- Lens Application: Visible
- Materials: Sapphire; Optical Glass, Fused Silica
from ECOPTIK (CHANGCHUN) LTD
BRD Optical provide meniscus lens in both positive and negative focal lengths. These lenses are useful when used with another lenses to increase or decrease the focal length. This lens element configuration does not introduce any additional coma or spherical aberrations [See More]
- Surface Quality: 20-10 Scratch / Dig; 40-20 Scratch / Dig; 60-40 Scratch / Dig
- Focal Length: -2000 to -50
- Center Thickness: 2 to 20
- Diameter / Length: 2 to 300