Biconcave Lenses, φ30 mm, Focal Distance: -80 mm, Back Focus: -80.66 mm, Material : BK-7
Brand :
AS ONE
Caution
Product Description
[Features]
- Biconcave lenses have negative focal length and are used for image contraction and divergence.
[Specifications]
- Material: BK-7
- Outer diameter (φmm): 30
- Focus distance (mm): -80
- Bag focus (mm): -80.66
- Medium thickness (mm): 2
- Koba meat (mm): 4.7
- Design wavelength: 587.6nm
- Refractive index: 1.51680/nd
- Chamfer (45°): 0.2 - 0.5mm
- Tolerance range/Outer diameter: φ+0/-0.1mm
- Tolerance range/Center thickness: ±0.2mm
- Tolerance range/Focal length: ±2%
- Tolerance range/Surface quality: MIL60-40
- Tolerance range/Eccentricity: within 3 minutes (3')