Double-Concave (DCV) Lenses

Double-Concave (DCV) Lenses

  • Focal Length Tolerance (%): ±1
  • Surface Quality: 40-20
  • Power (P-V) @ 632.8nm: 1.5λ
  • Irregularity (P-V) @ 632.8nm: λ/4
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What Are Double-Concave Lenses?

Double-Concave (DCV) lenses are optical components with two inwardly curved surfaces.

They are primarily used to diverge collimated light beams and to expand optical paths.

Therefore, it can adjust the focal length of the optical system and has a divergent effect on light.

Because of their negative focal length, they are often used in laser beam expanders, optical instruments, and imaging systems where light divergence and control are required.

Key Features of Double-Concave Lenses

  • Negative Focal Length – Ideal for diverging parallel beams. People often use them in image situations.
  • Symmetrical Design – Provides minimal spherical aberration for collimated light.
  • High Precision Manufacturing – Ensures optical clarity and consistent performance.
  • Material Versatility – Available in N-BK7, fused silica, ZnSe, CaF₂, and other optical-grade materials to support UV, visible, and IR wavelengths.

Applications

  • Laser Beam Expanders

Double concave lenses are often used in combination with convex lenses to expand and regulate the diameter of the laser spot.

Because then can effectivly improve the collimation and beam quality of the laser.

  • Optical System Adjustment

By changing the path of light propagation and the focal length, people often use the lenses to make more exoeriments.

  • Imaging Systems

People also choose the lenses to correct distortion and control aberrations in imaging instruments such as microscopes and telescopes,

  • Projection and Illumination Systems

The lenses are suitable for use in optical lighting systems such as projectors and stage lights.

  • Spectroscopy and Measurement Devices

In spectrometers, interferometers and other scientific research instruments can use the double-concave lenses.

  • Infrared and Ultraviolet Applications

Some situations like laser processing, infrared imaging, and ultraviolet detection.

The Chenyu uncoated double-convex (DCV) lenses offer the best performance within the range of 350 nanometers to 2200 nanometers.

These lenses also provide options such as VIS-EXT, MgF, VIS o, VIS NIR, NIR I, or with a NIR II anti-reflection coating.

Chen Yu supports customized services.

If you have any needs, you can contact us at any time or check out our other lens products.

 

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