搜索
Double-Concave Lens

Double-Concave Lens



Biconcave lens is similar to a plano-concave lens in that the focal length is negative, which can cause the rays of parallel incidence to diverge outwards.

0.00
0.00
  



Biconcave lens is similar to a plano-concave lens in that the focal length is negative, which can cause the rays of parallel incidence to diverge outwards.



Products Description

The line between the two curvature centers is called the principal axis and the central point O is called the optical center. Light passing through the center of light is not refracted no matter where it comes from. The light beam with parallel principal axis is refracted on the concave lens and then diverges in a square direction. The extension line in the opposite direction of divergence will all be at one point F on the same side of the light source, and the refracted light will just as if it were emitted from point F. This point is called the virtual focus and there is one on each side of the lens. When used in photonic medium, it can diverge the incident light beam, so it is also called diverging lens. The focal length of a concave lens is the distance from the focus to the center of the lens. The larger the radius of the lens, the longer the focal length.

The principle of geometric drawing of double concave lens imaging is the same as that of convex lens. From the top of the object also as two straight lines: a parallel to the main axis of light, after the biconcave lens deflection into a divergent light, the refraction of light in the opposite direction back to the main focus; The other passes through the optical center of the lens. The two lines intersect at one point. This is the image of the object.

                                                                                                              

Material:              
Optical Glass, Fused Silica etc.
Diameter tolerance:
 +/-0.1mm
Thickness tolerance: 
 +/-0.2mm
Focal tolerance:
 +/-2%
Surface quality :
 40-20, 20-10
Centration: 
 3 arcmin
Surtace flatness:
 2λ, 1/2λ, 1/4λ
Clear aperture:
 90%
Bevel:
 0.2mmX45° Protective bevel    




Related Products​
  • Plano-Convex Lens
  • Plano-Concave Lens
  • Double-Concave Lens
  • Powell Lens
  • Rob Lens
  • Double-Convex Lens
  • Concave-Convex Lenses
  • Achromatic Lens
  • Aspherical Lens
  • Plano-Convex Cylindrical Lens
  • Roof Prism
  • Dove prism
  • Right Angle Prism
  • Ball Lens