Changchun Realpoo Photoelectric Co.,Ltd.

Concave Lens (Negative Lens)
Beam Expansion & Divergence Control for Laser and Optical Systems
Lens Types: Plano-Concave (PCV) / Bi-Concave (BCV) / Meniscus Concave
Customization: Diameter • Focal Length • Curvature • Coating • Mounting

What Is a Concave Lens?
A concave lens (also called a negative lens) is used to diverge light rays. It creates a virtual focal point and is widely used for:
  Beam expansion (laser beam expander systems)
  Divergence control
  Optical system correction (aberration/field adjustment)
  Telescope and imaging optics

Material & Coating Options
Materials
Optical glass (BK7 etc.): standard visible applications
Fused silica: UV/NIR & laser durability
IR materials (Ge / ZnSe / ZnS / Si): infrared systems (custom)
Coatings
AR coating (single wavelength): lowest reflection at target nm
BBAR: broadband wavelength support
Dual-side AR: higher transmission efficiency
Laser-grade coating: improved durability for industrial lasers