HO-BVL25-40 25mm Dia. N-BK7 Double-Concave Lens; EFL=-1000mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Concave)
- Brand
- Holmarc Opto-Mechatronics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- EFL
- -1000 mm
- R1
- -1043.69 mm
- R2
- 1043.69 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-BVL25-40 25mm Dia. N-BK7 Double-Concave Lens; EFL=-1000mm Uncoated
This is a HO-BVL25-40 25mm Dia. N-BK7 Double-Concave Lens, sourced from Holmarc Opto-Mechatronics. The lens is uncoated and features a base shape of a circle, with a diameter of 25mm and a center thickness of 2.5mm.
The lens is designed with a double-concave geometry, featuring two concave surfaces. The first surface, or the front surface, has a radius of curvature (R1) of -1043.685969mm, while the second surface, or the back surface, has a radius of curvature (R2) of 1043.685969mm. The lens is manufactured from N-BK7 Schott glass, a popular choice for its high refractive index and low dispersion.
The effective focal length (EFL) of this lens is -1000mm, indicating that it is a diverging lens, causing incoming light rays to spread out after refraction. This makes it suitable for applications such as beam expansion or divergence.
The lens is designed to operate at a wavelength of 587.6nm. It is important to note that the lens is uncoated, meaning it does not have any anti-reflective coatings. This could lead to unwanted reflections, especially in high-power applications. However, it also means that the lens is more cost-effective and easier to clean.
In conclusion, this HO-BVL25-40 25mm Dia. N-BK7 Double-Concave Lens is a high-quality, cost-effective solution for applications requiring beam divergence or expansion. It is made from durable N-BK7 Schott glass and is uncoated, offering a straightforward and reliable optical solution.