Realization of high-precision micro-groove forming with roll molds for optical films
Video devices such as TVs and displays are becoming higher resolution types, such as "4K8K", and having smaller and more complex structures such as xR (VR/AR/MR, etc.) goggles. In order to achieve these technologies, finer machining of precision molds for optical films and optical elements is required.
The use of fine cutting tools with mono-crystal diamond enables high-precision fine groove forming with continuous pitch in the machining of roll molds for optical films. Mono-crystal diamond has excellent wear resistance and contributes to the long-time continuous machining of large rolls.
Example of mono-crystal diamond ultrafine cutting tool edge shape
Reference example of nano radius ultrafine cutting tool (radius size under R1μm)
Expected effects for optical parts mold are contributing smoother release ability, improvement of surface texture, and suppression of rainbow reflection.
Supposed production range: R100nm ～ under R800nm
Mono-crystal diamond ultrafine cutting tool
These mono-crystal diamond bites have fine cutting edges made of single-crystal diamonds, which have excellent wear resistance and can make the edges very sharp. By using single-crystal diamond microbites, a cutting edge controlled in micrometers (μm) is transferred to a workpiece, and a fine groove pattern can be formed with high precision and a continuous pitch.
Machining of optical films for FPDs and precision molds for optical elements
Micro-pattern forming and planer machining
Machining of diffraction gratings
Other MEMS and bio-related micro-pattern machining
Standard Specification [Nose angle under 15°] [Size: mm]