Patent ID: 11865663
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 9:
10. A device for polishing an optical surface, the device comprising:
a flexible substrate that is conformable to a lens, the flexible substrate comprising a front side for facing a lens, the flexible substrate further comprising a back side for coupling with a lens-polishing device;
a cushion located on the back side of the flexible substrate;
cerium oxide particles, comprising:
at least ninety-five percent (95%) fine cerium oxide particles, each fine cerium oxide particle having a particle size that is between approximately 0.5 micrometers (μm) and approximately 5.0 μm; and
at most five percent (5%) coarse cerium oxide particles, each coarse cerium oxide particle having a particle size that is greater than approximately 5.0 μm; and

a water-insoluble binder on the front side of the flexible substrate, the water-insoluble binder binding the cerium oxide particles to the flexible substrate.