Cometek Double Convex and Concave Lens, Set of 4, Concave and convex of Dia 50mm, F.L.10cm and 20cm

• Configuration Unit: Set of 4 Lenses
• Lens Diameter: 50mm (Standard Size)

Features

• High Purity Transmittance Matrix: Crafted from professional grade optical glass featuring a uniform refractive index to ensure highly defined beam tracking and real-world convergence properties.
• Passivated Perimeter Rims: The 50mm borders undergo secondary diamond-wheel grinding to eliminate sharp burs and resist structural cracks during tight mechanical clamp lockups.
• Scratch-Resistant Surface Engineering: Resists routine finger oils and light surface cleaning friction, ensuring the lenses maintain crystal-clear performance over years of student lab work.

Applications

• Corrective Vision System Models: Ideal for demonstrating the physical core of optometry, showing how concave lenses fix myopia and convex profiles address hyperopia.
• Telescope & Microscope Engineering: Serves as a fundamental teaching model for constructing mock-ups of Galilean telescopes or Keplerian magnifying systems on an optical bench.
• Laser Beam Expansion Setups: Perfect for engineering and photonics labs to expand or collimate concentrated laser sources through specific geometric paths.
• Focal Power Matrix Mapping: Allows academic laboratories to combine convex and concave elements to calculate total effective focal length variations in multi-lens setups.