Double-Concave (DCV) Lenses
- Materials: Optical glass, calcium fluoride, magnesium fluoride, silicon, germanium, zinc selenide, etc.
- Diameter: 1-600mm
- Diameter Tolerance: ±0.03 mm
- Thickness Tolerance: ±0.03mm
- Surface finish (American standard) : 60-40 or 10-5
- Focal length error : ±2%
- Clear Aperture: ＞90
- Eccentricity: ≤3 arcmin
- Bevel: 0.2mmX45°
- Coating: Customization
Description
Introduction of Bote Double-Concave (DCV) Lenses
A biconcave lens is concave on both sides and has the same radius of curvature.
Biconcave lenses with negative focal length are often used to collimate beams, increase (reduce) focal length, or enlarge (shrink) the image.
N-BK7 is the most common lens material. Bote chooses to use N-BK7 to make a variety of lenses, mostly used in visible light and near-infrared applications.
In addition to the N-BK7 biconcave lens, Bote also provides the N-SF11 biconcave lens. Because N-SF11 has a lower Abbe number, it is often used to make lenses with smaller focal lengths.
Bote provides uncoated biconcave lenses and three types of anti-reflection coated lenses: 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm.
Our lenses are all processed with precision and quality is strictly controlled at reasonable prices.
Application
The divergent properties of biconcave lenses make them widely used in many fields:
- Correcting vision problems: In the field of glasses, biconcave lenses are used to correct farsightedness and help the eyes better focus on nearby objects.
- Laser systems: In some laser systems, biconcave lenses are used to expand the beam to match the requirements of other optical components.
- Optical instruments: In optical instruments such as microscopes and telescopes, biconcave lenses can be used as corrective lenses to improve imaging quality.
- Arts and Entertainment: In lighting design and stage effects, biconcave lenses are sometimes used to create special light effects.
Feature of Bote Double-Concave (DCV) Lenses
- Simplifying optical systems: Biconcave lenses can be combined with other types of lenses to correct the shape or focusing characteristics of the beam and simplify the design of optical systems.
- Adjust the beam size: By diffusing the beam, biconcave lenses can adjust the diameter of the beam for applications requiring a specific beam size.
- Cost-Effectiveness: Biconcave lenses are generally simple to manufacture and therefore less expensive to produce in large quantities.
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