See all 12 Products in Family

5mm Diameter, Extended B270 Half-Ball Lens

B270 Half-Ball Lenses

Stock #21-904 New
- +
Qty 1-10
Qty 11+
Volume Pricing
Request Quote
Get Product Downloads
Diameter (mm):
5.00 ±0.1
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Half-Ball Lens
Center Thickness CT (mm):
2.80 ±0.15
Index of Refraction nd:
Radius R (mm):
Wavelength Range (nm):
360 - 2700

Regulatory Compliance

RoHS 2015:
Reach 224:
Certificate of Conformance:

Product Family Description

  • Available in Hemispherical, Truncated, and Extended Geometries
  • High Transmission in the Visible and NIR
  • Ideal for Cost Sensitive Applications

B270 Half-Ball Lenses feature a molded spherical surface and polished plano surface, facilitating easier mounting compared to ball lenses. The B270 substrates have high transmission from the visible to the near infrared (NIR) and have a similar refractive index to N-BK7, making these lenses an ideal alternative for cost sensitive applications. Each diameter of lens is available in three form factors, standard hemispherical, truncated (hypo-hemisphere), and extended (hyper-hemisphere), providing multiple options to best meet system mechanical requirements. B270 Half-Ball Lenses are used in high power LED, fiber coupling, endoscopy, microscopy, and laser measurement applications.