66-333 40 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=30mm; NA=0.66 BBAR 600-1050nm
- Type
- Lens
- Subtype
- Aspheric Lens
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 40 mm
- EFL
- 30 mm
- BFL
- 20.6 mm
- R1
- 18.23 mm
- R2
- 400 mm
Material
- Name
- L-BAL35
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5891276536746055
- λ
- 587.6 nm
- B1
- 1.1626263
- C1
- 0.0125957437 μm2
- B2
- 0.325661051
- C2
- -0.0032691105 μm2
- B3
- 1.35132486
- C3
- 119.214596 μm2
66-333 40 mm Dia. L-BAL35 Precision Aspheric Lens; EFL=30mm; NA=0.66 BBAR 600-1050nm
This is the 66-333 model from Edmund Optics, a high-precision aspheric lens with a 40 mm diameter. The lens is made from L-BAL35, a material specifically designed for use in the near-infrared (NIR) region. It has a numerical aperture (NA) of 0.66, indicating a wide acceptance angle and high light-gathering capability.
The lens's effective focal length (EFL) is 30 mm, making it suitable for applications that require a moderate level of magnification. The front and back surfaces of the lens are coated with BBAR 600-1050, a broadband anti-reflection coating that reduces surface reflections across the 600-1050 nm wavelength range.
The lens's geometry is defined by several key parameters. The inner radius is 0, suggesting a simple, straightforward design. The outer radius is also 0, indicating a symmetrical structure. The thickness at the edge is 2.56 mm, while the thickness at the center is 15.5 mm. The front and back focal lengths are 4.93e-09 m and 20.6 m, respectively.
The lens's aspheric shape is defined by its radii of curvature (r1 and r2), which are 18.225 mm and 400 mm, respectively. The conic constant (k1) is -0.632215, indicating a moderately deep aspheric surface.
