10-5 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 Foctek Photonics, Inc.
FOCtek provides five kinds of spheric lens forms, or shapes, that determine the imaging Characteristics. of the lenses, they are plano-convex, plano-concave, Double-convex, Double-concave and Meniscus. Plano-convex lens has a positive focal length, which makes it ideal for collecting and focusing... [See More]
- Surface Quality: 10-5 Scratch / Dig; 60-40 Scratch / Dig
- Surface Flatness: λ/4; <1.5?
- Materials: BK7 Glass; Calcium Fluoride; Sapphire; H-K9, Fused Silica, N-SF10, Silicon
- Lens Features: Antireflection Coating (optional feature)
from Changchun Sunday Optics Co., Ltd.
The H-K9L double concave lens has excellent transmittance from visible to near infrared (350-2000nm).H-K9L (N-BK7) is a commonly used optical glass for the preparation of high-quality optical elements. When the additional advantages of UV melting quartz (good transmittance and low thermal expansion... [See More]
- Surface Quality: 10-5 Scratch / Dig
- Materials: Germanium; Sapphire; Optical glass, UVFS, Germanium, Silicon, CaF2, MgF2, ZnSe ZnS, Sapphire
- Lens Application: Infrared; Visible
- Surface Flatness: λ/10
from MOK Optics Co., Ltd.
meniscus lenses are used to decrease the focal length of another lens while maintaining the angular resolution of the optical assembly. These lenses are commonly used to achieve tighter beam focusing when paired with another positive lens. [See More]
- Surface Quality: 10-5 Scratch / Dig
- Materials: Germanium; Sapphire; Ultra-violet grade Fused Silica; CDGM, SCHOTT, OHARA, HOYA, MgF2, CaF2, ZnSe, ZnS etc
- Diameter / Length: 3 to 250
- Surface Flatness: λ/8