Plano-Convex Lenses, φ15 mm, Focal Distance: 70 mm, Back Focus : 67.5 mm

[Features]
- This optical lens having positive focal length is mainly used for magnification of image and light condensing.
- Made of quartz, this product offers high transmittance in all regions from ultraviolet region to infrared ray wavelength region (approximately 900nm).
- Its low thermal expansion coefficient ensures excellent heat resistance.
- This product is usually used with the curved surface of the lens facing the object.
[Specifications]
- Outer diameter (φmm): 15
- Focus distance (mm): 70
- Bag focus (mm): 67.5
- Medium thickness (mm): 3.6
- Koba meat (mm): 2.76
- Material: Synthetic quartz
- Design wavelength: 587.6 nm
- Refractive index: 1.45850 /nd
- Chamfer (45°): 0.2-0.5mm
- Tolerance range Outer diameter: φ+0/-0.1 mm
- Tolerance range Center thickness: ±0.2 mm
- Tolerance range Focal length: ±2 %
- Tolerance range Surface quality: MIL60-40
- Tolerance range Eccentricity: within 3 minutes (3')