HO-BVL25-20C 25mm Dia. N-BK7 Double-Concave Lens; EFL=-500mm Single Layer MgF2
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Holmarc Opto-Mechatronics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -500 mm
- R1
- -522.1 mm
- R2
- 522.1 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167984379050088
- λ
- 587.6 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
HO-BVL25-20C 25mm Dia. N-BK7 Double-Concave Lens; EFL=-500mm Single Layer MgF2
The HO-BVL25-20C is a high-quality double-concave lens offered by Holmarc Opto-Mechatronics, a renowned vendor in the optical industry. This lens, with a base shape of a circle, is designed for use in a wide range of optical applications.
The lens has a diameter of 25mm and a center thickness of 2.5mm, making it compact and suitable for various setups. The effective focal length (EFL) of this lens is -500mm, indicating its double-concave nature. This negative focal length is crucial in applications where light needs to be diverged or where a virtual image is required.
The lens is made from N-BK7, a popular optical glass from Schott, known for its excellent optical properties and wide transparency range. This material is particularly suitable for applications in the visible spectrum, as demonstrated by the wavelength of 587.6nm specified in the item data.
The lens features a single layer of MgF2 coating on both the front and back surfaces. This coating, known for its high transmittance and durability, is designed to reduce reflection and increase the lens's overall light transmission. The coating is applied at 0 degrees angle of incidence (AOI), ensuring uniformity and consistency.