69-492 12.0mm Dia. x 72.0mm FL; Plano-Convex Lens Laser V-Coat 785nm
- Type
- Lens
- Subtype
- Spherical Lens (Plano-Convex)
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 12 mm
- EFL
- 72 mm
- BFL
- 70.42 mm
- R1
- 37.21 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5110795649082278
- λ
- 785 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
69-492 12.0mm Dia. x 72.0mm FL; Plano-Convex Lens Laser V-Coat 785nm
The 69-492 is a Plano-Convex Spherical Lens, 12.0mm in diameter and featuring a focal length of 72.0mm, specifically designed for use with a 785nm wavelength. This lens is sourced from Edmund Optics, a leading vendor in the optical industry, and is currently in stock.
The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. The Plano-Convex geometry, where one side is flat and the other is rounded, is ideal for collimating or focusing light. The lens has a center thickness of 2.4mm and an edge thickness of 1.91mm, providing a robust structure while maintaining a low profile.
The lens features a front and back coating of EDM Las V-Coat 785, a specialized coating designed to enhance laser damage threshold and improve transmission at the specified wavelength. The effective focal length (EFL) is 72.0mm, and the back focal length (BFL) is 70.42mm, making it suitable for various optical applications.