Aspherical/Specialty Lenses
FOCUSROD -屈折率分布レンズ-

Micro GRIN Rod Lenses
FOCUSROD®

Micro GRIN (Gradient-index) lenses with diameter of 0.15 - 0.8 mm.

  • Wide viewing angle and small chromatic aberration
  • Since the end face is flat, FOCUSROD is easy to be mounted on a micro fiberscope as an objective lens
  • Customized available: focal length (0.04 – 50 mm), angle of view (65 – 80°)
  • RoHS compliant

Specifications

Product type FR-80 FR-70 FR-65
Diameter 0.350+0/-0.005 0.350+0/-0.010 0.350+0/-0.010
Lens length 0.732±0.050 0.762±0.050 0.780±0.050
Resolution ≧ 400 LP/ mm at center
≧ 150 LP/ mm at periphery
Magnificatio 1:23 1:20 1:18
View angle 80±2° 70±2° 65±2°
Working distance 5.0 mm
Field curvature ≦40 µm ≦30 µm ≦25 µm
Chromatic aberration ≦15 µm
Refractive index at center About 1.674 About 1.665 About 1.660
Convergence parameter About 2.21 About 2.11 About 2.08
  • Field curvature data shows the distance of the image forming point between a central part and a peripheral part of a lens.
  • Tolerance of cracks and chips in surface is limited to outside of 90% of lens radius.

Images through FR-80 GRIN Lens

  • Numbers

  • Coin

  • Liquid Crystal Panel

FOCUSRODⓇ and Focus Rod are registered trademarks of Sumita Optical Glass, Inc.

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