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Convex lens can be divided into biconvex, planoconvex and concave convex (or positive meniscus). Thin convex lens has the function of convergence, so it is also called condensing lens. Thicker convex lens has the function of telescope, divergence or convergence, which is related to the thickness of lens.
Convex lens can be divided into biconvex, planoconvex and concave convex (or positive meniscus). Thin convex lens has the function of convergence, so it is also called condensing lens. Thicker convex lens has the function of telescope, divergence or convergence, which is related to the thickness of lens.
Concave lens specifications and parameters
Product material: Optical quartz glass; optical h-k9l glass; others need to be custom-made
Standard level: Surface Quality 40-20 Parallelism<5
Diameter tolerance: -0.1mm
Thickness tolerance: ±0.1mm
Chamfering of lens: 0.5mm 45°
Optical aperture: ≥90%
Coating: 1064nm AR Coating. According to customer requirements for coating.
Focus lens type: [monolithic] Plano convex Lenses/Plano Concave Lenses
Double convex + crescent moon
Product quantity: In stock
How many types of concave lenses are there?
1. The plane concave lens: They have a negative focal length and are used to radiate a beam of parallel light. The concave lens is spherical on one side and flat on the other. The middle is thinner than the two sides.
2. Flat convex lens: The focal length of a single lens is the distance from the principal point to the focal point. Because the focal length changes with the wavelength, when it is used for other wavelengths, the focal length also changes.
3. Concave convex lens: It's a thicker lens in the center. Convex lens can be divided into biconvex, planoconvex and concave convex (or positive meniscus). Thin convex lens has the function of convergence, so it is also called condensing lens. Thicker convex lens has the function of telescope, divergence or convergence, which is related to the thickness of lens.
4. Biconvex lens: A biconvex lens is a kind of biconvex lens sheet, which comprises an incident surface and an emitting surface. The biconvex lens sheet is characterized in that the focal length of the middle part of the lens surface is longer, and the focal length of the end part of each transparent mirror is shorter. Biconvex lens is mainly used to gather light from point source or transfer image to other optical systems.
What is the purpose of a plano concave lens?
The main functions of the focus lens are as follows:
1. The ability of edge beam incident on detector is improved;
2. In the same main optical system, the additional field lens will reduce the area of the detector; If the same detector area is used, the field of view can be expanded and the incident flux can be increased;
3. The non-uniform illumination on the photosensitive surface of the detector is homogenized.
How does a concave lens work?
The concave lens are the focus lens: Focusing lens is to focus light beam, which can produce focus lens with high energy density. The main materials are fused quartz, zinc sulfide, zinc selenide, calcium fluoride and so on. Different appearance features have different uses. Focusing lens is one of the important parts of laser marking machine, which aims to focus the laser on the whole marking plane of the workpiece. We can provide various laser lens solutions, please contact us.
